CN202968252U - COD (Chemical Oxygen Demand)-N shared-pool synchronous degrading device for high-concentration wastewater - Google Patents

Abstract

The utility model relates to a COD (Chemical Oxygen Demand)-N shared-pool synchronous degrading device for high-concentration wastewater. The device mainly comprises a biochemical pool, wherein a first-cell high-density return-ring shaped aeration device and a second-cell high-density return-ring shaped aeration device are arranged on the bottom of the biochemical pool; the first-cell high-density return-ring shaped aeration device and the second-cell high-density return-ring shaped aeration device are connected with a first air blower and a second air blower, respectively; a functional partition wall is arranged in the biochemical pool and used for dividing the biochemical pool into a first-cell aeration area and a second-cell aeration area; a hole of the functional partition wall is formed on the bottom of the functional partition wall; a pneumatic lifting device for returning a mixed solution is arranged on the second-cell aeration area and used for returning one part of the mixed solution at the tail end of the second-cell aeration area to a water inlet end of the first-cell aeration area; and the second-cell aeration area is communicated with a mud-water separating device by a water pump. The COD-N shared-pool synchronous degrading device for high-concentration wastewater has the beneficial effects of improving the COD removing efficiency of a biological synchronous nitrogen removal process and achieving the COD-N shared-pool synchronous degrading. The process can be used for domestic wastewater treatment and is more suitable for industrial treatment of the wastewater with the high-concentration COD and N.

Description

High-concentration waste water COD and N are with the synchronous decomposition apparatus in pond

Technical field

The utility model relates to a kind of waste water treatment process and device, is mainly that a kind of high-concentration waste water COD and N are with the synchronous decomposition apparatus in pond.

Background technology

Consisting of wastewater through organic matter has the elements such as C, N, P, and wherein C is the main component of COD, and N comprises ammonia nitrogen, total nitrogen etc., and the Important Problems that water pollutes is the pollution of COD and ammonia nitrogen, so treatment of Organic Wastewater must be removed COD and N.

The COD degraded is mainly the oxidizing reaction that microorganism occurs in aerobic environment, and the enzyme of microorganism and the synergy of the oxygen in waste water are oxidized to CO with C₂Organonitrogen was in aerobic or anaerobic environment before this for the degradation process of N, and ammonification becomes inorganic nitrogen, then in aerobic environment, nitration reaction occurs, and reduction reaction occurs in anaerobic environment afterwards generate nitrogen.Therefore enough dissolved oxygens are the biodegradable prerequisites of waste water COD, and suitable dissolved oxygen is the controlled condition of biological denitrificaion.

Synchronous nitration and denitrification theoretical (SND) and low oxygen dissolving control technology provide new theoretical basis and technique means to biological denitrificaion, and last century, the nineties Holland and the country such as Belgian researched and developed corresponding CANON technique and OLAND technique.The core of its technique is: control biochemistry pool low dissolved axygen environment, realize the biochemical reactions such as short distance nitration and Anammox, aerobic nitrification and aerobic denitrification in same reactor, namely with the pond simultaneous denitrification.Biological simultaneous denitrification technique is compared with traditional technique, has obvious advantage, and the one, technique is simple and direct, floor space is little, convenient management; The 2nd, working cost is low, need not to add alkali, mends carbon, and the mud discharge capacity is few, and power consumption is low; The 3rd, it is high that total nitrogen is removed efficient.

But along with through engineering approaches is used, when high concentration COD and N and the Industrial Wastewater Treatment of depositing, the contriver finds that biological simultaneous denitrification technique is left to be desired:

The one, " low dissolved oxygen " narrow (value 0.1 ~ 0.5mg/L) of scope of technique initialization aeration zone, the oxygen supply insufficient total amount, abundant not to the oxidation of high concentration COD, the COD degradation efficiency is low, need to extend the biochemical residence time or increase the biochemistry pool capacity, causing engineering economics decline;

The 2nd, low dissolved oxygen is controlled stable not, because biochemistry pool is low dissolved oxygen aeration, aeration rate is little, conventional bar shaped aeration mode, aeration is inhomogeneous, the aeration dead angle appears in biochemistry pool surrounding pool side and corner, and mud easily sinks to the bottom, and causes the not good and COD degradation efficiency of the three-phase mass transfer effect of " waste water oxygen mud " to descend;

The 3rd, return current ratio of the mixed liquid is set and is only considered to improve flow condition with the dilution of COD, do not consider the indexs such as B/C ratio, C/N ratio and toxic in conjunction with wastewater property, the excessive energy consumption that causes of reflux ratio increases, the too small high-concentration waste water that causes of reflux ratio is to the microorganisms restraining effect, and the COD degradation efficiency descends;

The 4th, the sludge concentration of technique initialization is high, and the mud-water separation difficulty is large, during greater than 7500mg/L, adopts the method for inclined tube and swash plate clarification as MLSS, and water outlet band mud phenomenon is more serious, and COD is up to standard unstable.

The utility model content

The purpose of this utility model is to provide a kind of high-concentration waste water COD and N with the device of the synchronous degraded in pond, by improving the method for aeration mode and mud-water separation, device gets final product simultaneous denitrification, can improve the COD degradation efficiency again, realizes that COD and N are a device inter-sync degraded.

The purpose of this utility model is completed by following technical solution.High-concentration waste water COD described in the utility model and N with the synchronous decomposition apparatus in pond, are that high-concentration waste water COD of the present utility model and N use with the through engineering approaches of the synchronous degradation technique in pond.

Described device is a biochemistry pool, functional partition wall is set in biochemistry pool biochemistry pool is divided into the first lattice aeration zone and the second lattice aeration zone, the first lattice high-density winding type aerating apparatus and the second lattice high-density winding type aerating apparatus are arranged at the biochemistry pool bottom, are connected with the second blower fan with the first blower fan respectively; In the second lattice aeration zone, the mixed-liquor return pneumatic lifter is set, with mixed-liquor return to the first lattice aeration zones feed-water end of the second lattice aeration zones end; The second lattice aeration zone arranges water pump and is connected with device for separating mud and water, clear water discharging after mud-water separation.

As preferably, the functional partition wall of described device can utilize structural partition wall, but does not comprise structural partition wall, and the height of partition wall and pond outer wall are contour, the position of partition wall take the biochemical residence time 〉=6 of satisfying the first lattice aeration zone hour as benchmark, 6 ~ 12 hours biochemical residence time of optimization.Reserved function partition wall hole on functional partition wall is positioned at the feed-water end of the first lattice water side and the second lattice, and the hole bottom is connected with at the bottom of the pond, and satisfied the first lattice of bore hole size go out water mixed liquid overcurrent speed 0.2 ~ 0.4m/s.

As preferably, the winding type aerating apparatus mounting means of described device can adopt fixed and portable, theouter circumference 2 ~ 80m of aeration tube, preferred 8 ~ 32m, the outer circumference of aeration tube can adopt artificial lifting less than 8m, and the outer circumference of aeration tube is greater than 8m, the preferred mechanical lifting that uses, promoting point of fixity is the aeration blast pipe; Aeration tube outer wall spacing 80 ~ 350mm, preferred 100 ~ 200mm; Spacing 100 ~ 200mm at the bottom of aeration tube and pond; Aeration tube and pool wall spacing 150 ~ 250mm; Aeration tube is plastics tubing and other material pipe, diameter 50 ~ 80mm, preferred microbubble plastic hose, diameter 50 ~ 65mm.Aeration tube adopts the press strip pressure pipe, and press strip spacing 500 ~ 800mm is to prevent the aeration tube floating.

As preferably, the first lattice high-density winding type aerating apparatus of described device and the second lattice high-density winding type aerating apparatus, can select back-shaped layout, bottom airduct and four limit shaped steel that two of bottoms intersection is communicated with form hollow aeration tube frameworks, vertical blast pipe on airduct corner, bottom is connected with blower fan, on the airduct of bottom, the interval arranges several connectors, four connectors equidistant with airduct center, bottom form back-shaped corner, connector one end is communicated with the bottom airduct, and two ends connect aeration tube and form back-shaped aeration coil structures.

As preferably, the first lattice high-density winding type aerating apparatus of described device and the second lattice high-density winding type aerating apparatus, can select and be circular layout, two of bottoms intersection shaped steel and four limit shaped steel form annular aeration tube frameworks, annular aeration circle nook is admission, admission is installed connector, a vertical blast pipe of end welding of connector, and another two ends connect aeration tube.

As preferably, the blast pipe of the high-density winding type aerating apparatus of the utility model device is connected with the airduct of blower fan, tie point is more than water surface 800mm, and mode of connection is detached type, and a valve and a loose joint with bore are installed on the blast pipe of aerating apparatus.

Utilize device described in the utility model to realize high-concentration waste water COD and N with the synchronous degradation technique in pond, step is as follows:

(1), biochemistry pool of the present utility model adopts low dissolved oxygen to control, and by functional partition wall, this biochemistry pool is divided into the first lattice aeration zone that different dissolved oxygen controls and the second lattice aeration zone, the bottom, aeration zone arranges high-density winding type aerating apparatus;

(2), waste water and phegma mix and aeration at the first lattice aeration zones feed-water end, the first lattice aeration zones end mixed solution flows into the second lattice aeration zone and aeration, carries out the degraded of COD and N in the first lattice aeration zone and the second lattice aeration zone.The mixed solution part of the second lattice aeration zones end is back to the first lattice aeration zones feed-water end, and another part enters device for separating mud and water, the clear water discharging after mud-water separation.

First lattice aeration zone dissolved oxygen span of control 0.1 ~ 0.5mg/L of described technique, its effect is that simultaneous denitrification reaction and part COD degraded occur, the first lattice aeration zone generation denitrification is relatively important, its biochemical residence time must be satisfied the requirement of denitrification process, therefore the position by changing functional partition wall is to guarantee the first biochemical residence time 〉=6, lattice aeration zone hour, preferred biochemical 6 ~ 12 hours residence time.The biochemistry pool total residence time requires design according to wastewater treatment.

Dissolved oxygen is suitably improved according to different wastewater properties in the second lattice aeration zone of described technique under low dissolved oxygen level, in simultaneous denitrification, can improve the degraded to COD.Preferred second lattice aeration zone dissolved oxygen span of control 0.1 ~ 1.8mg/L shows that microorganism is in the critical environment of " oxygen of holding concurrently " and " aerobic ", and microbial population is abundant, to the more diversification of organic mechanism of degradation.In " oxygen of holding concurrently " environment, the oxygen heterotrophic bacterium of holding concurrently is hydrolyzed into small molecules, anoxic denitrification bacterium with NO with macromole such as organic carbon and protein₂^-And NO₃^-Be reduced into N₂^-, anaerobic ammonia oxidizing bacteria becomes N with ammonia oxidation₂In " aerobic " environment, aerobic heterotrophic bacterium is oxidized to CO with organic carbon₂, the aerobic nitrification bacterium becomes NO with ammonia oxidation₂^-With a small amount of NO₃^-, aerobic denitrifying bacteria becomes N with ammonia oxidation₂By above-mentioned serial biochemical reaction, realize that COD and N synchronously degrade with the pond.

As preferably, the second lattice aeration zone of described technique is low dissolved oxygen aeration, and it is C C that dissolved oxygen calculates formula₀+ r * K * e^-x, wherein:

Dissolved oxygen floors C₀Be under minimum aeration rate, guarantee that biochemistry pool is the oxygen attitude of holding concurrently and prevents again the dissolved oxygen value that mud sinks to the bottom, preferred 0.1 ~ 0.3mg/L simultaneously;

Aeration coefficient r is the variable range of aerating system hardware, preferred 0.75 ~ 1.25;

Mud COEFFICIENT K reflection sludge concentration size is different to the demand of aeration intensity, and preferred 0.7 ~ 1.3;

Wastewater property is adjusted coefficient x, is industry or factory's coefficient, and waste water composition composition and the concentration of its expression different industries, factory are not identical, and its low dissolved axygen is controlled also different, and exponent function relation, and preferred 0.1 ~ 1.2.

The dissolved oxygen computational mathematics model of the utility model the second lattice aeration zone can calculate the dissolved oxygen value of different waste water fast and accurately, makes the dissolved oxygen span of control adapt to more accurately wastewater characteristics, helps the COD degraded.Under preferred dissolved oxygen was controlled, COD and N were ideal with the synchronous degradation efficiency in pond.

The wastewater treatment of a plurality of industries of contriver and factory practice, the dissolved oxygen scope of the second lattice aeration zone is different.The reactive printing waste water COD_Cr~ 5000mg/L, total nitrogen ~ 500mg/L, B/C ratio ~ 0.25, dissolved oxygen scope 0.2 ~ 0.9mg/L; Soybean wastewater COD_Cr~ 10000mg/L, total nitrogen ~ 500mg/L, B/C ratio ~ 0.55, dissolved oxygen scope 0.3 ~ 1.2mg/L; Leather waste water COD_Cr~ 3000mg/L, total nitrogen ~ 300mg/L, Fe is contained in B/C ratio ~ 0.35²⁺And S^2-Etc. the material of reductibility, dissolved oxygen scope 0.3 ~ 1.6mg/L.

As preferably, the high-density winding type aerating apparatus of described technique.High-density winding type aerating apparatus mounting means has fixed and portable, and preferred portable installation guarantees that the maintenance of aerating system does not affect production; The aeration tube of high-density winding type aerating apparatus is that high-density is laid, aeration tube spacing 80 ~ 350mm, preferred 100 ~ 200mm,aeration tube density 10 ~ 13m/m at the bottom of the pond², bubble upflow velocity 0.2 ~ 0.6m/s, bubble is idle distributes minimizing, can improve dissolved oxygen efficiency, reduces power consumption, can avoid strong aeration to the shearing of microorganism flco simultaneously, and sludge coagulating is good, flco is large, degree of compactness is moderate; The aeration tube of high-density winding type aerating apparatus is furnished with back-shaped layout and is circular layout two kinds, shape has that straight-flanked ring is logical, circular rings logical, the rhombus ring is logical and other Polygons ring is logical, preferred straight-flanked ring is logical, aeration tube is laid and is made the winding type into from bar shaped, aeration tube can pave pool side surrounding and corner, simultaneously the multiple spot air inlet can be arranged in winding type inside, and at the bottom of the pond, more even, aeration dead band and the sludgd deposition that biochemistry pool surrounding and corner can not occur of aeration, be conducive to stable low dissolved oxygen environment; The aeration tube of high-density winding type aerating apparatus is plastics tubing and other material pipe, diameter 50 ~ 80mm, preferred microbubble plastic hose, diameter 50 ~ 65mm, on flexible pipe, opening diameter is little, and the unit length number of aperture is many, the rising bubble diameter is little, and (Φ 2 ~ 4mm), the small bubbles of in the flco surface adhesion are conducive to the oxidation of aerobic repiration and carbon, nitrogen, and the dissolved oxygen of flco inside is not enough and abundance carbon source is conducive to the generation of denitrification, the degradation efficiency of raising COD and N.

As preferably, described technique the second lattice aeration zones end mixed-liquor return is to the feed-water end of the first lattice aeration zone, and the reflux ratio calculation formula is: M_j=(C_j0-C_j1)/K * 100%;

Wherein:

C_j0Certain water concentration (COD, N, hazardous and noxious substances etc.) of intaking, mg/L;

C_j1Corresponding water outlet water concentration, mg/L;

K technique initialization coefficient, 80 ~ 120;

M_jAccording to the reflux ratio that certain water-quality guideline is determined, %, preferred individual event reflux ratio is 0.008 ~ 0.013 times of certain water quality Inlet and outlet water concentration difference;

M system reflux ratio, %.

The utility model return current ratio of the mixed liquid computational mathematics model can calculate individual event water quality reflux ratio and system's reflux ratio fast, and system's backflow specific energy reflects the requirement of the indexs such as technique B/C ratio, C/N ratio and toxic exactly.When processing high-concentration waste water or containing the waste water of poisonous objectionable impurities, the high power backflow of mixed solution makes the every water-quality guideline of feed-water end and system operational parameters more stable, and opposing impact and the ability of poisoning are stronger, the microorganism characterization is obvious, and is more effective to COD and N degraded.Due to the high power backflow of mixed solution, in biochemistry pool, activated sludge concentration increases, and the maximization of microbe population improves COD and N degradation efficiency, reduces simultaneously tankage, the reduce mud quantity discharged.

As preferably, the second lattice aeration zones end mixed-liquor return of described technique is to the first lattice aeration zones feed-water end, the lifting gear of employing take air as power, the potential energy increase that phegma promotes 0.1 ~ 0.3m has just been satisfied in the air acting of lifting gear, can reduce the power consumption that the super liquid level of dynamo-electric pump head promotes, theoretical power consumption is only 1/6 of water pump, and lifting gear has again the oxygenation function, source of the gas obtains dual utilization, and technique is more energy-conservation.

As preferably, the mud-water separation of the second lattice aeration zones end mixed solution of described technique adopts the method for inclined tube and swash plate clarification, settling section surface load 0.5 ~ 1.0m³/ m².h, preferred membrane separation technique.Utility model people's practice shows, as the high-concentration waste water treatment of bean product industry, wastewater biodegradability is good, sludge yield is large, sludge concentration is high, during greater than 7500mg/L, adopts the method for inclined tube or swash plate clarification as MLSS, water outlet band mud phenomenon is more serious, therefore when high concentration COD and N and the wastewater treatment of depositing, preferred ultra-filtration membrane, it is stable that film is processed clear water COD, film is processed the feed-water end that concentrated solution is back to the first lattice aeration zone, and small part is discharged to the sludge disposal system outward.

As preferably, the dissolved oxygen of the utility model device adopts automation control method, and arranges two and overlap independently PLC Controlling System.At feed-water end, wastewater flow meter, COD on-line monitoring instrument are set; Electric butterfly valve and pressure unit are set on the blower fan airduct, at Ventilator Room, the PLC Controlling System are set, the first lattice aeration zone with the second lattice aeration zone, online dissolved oxygen meter is set, COD on-line monitoring instrument is set going out water outlet.

The beneficial effects of the utility model are: the utility model is to the upgrading of biological simultaneous denitrification technique and the improvement of low oxygen dissolving control technology, has COD and N with the function of the synchronous degraded in pond, the wastewater treatment that more is applicable to high concentration COD and N and deposits.With existing comparison of technology, the removal efficient of the one, COD and N is high, COD_CrClearance is greater than 95%, and ammonia nitrogen removal frank is greater than 95%, and nitrogen removal rate is greater than 80%; The 2nd, sludge discharge reduces more than 30%, and processing cost reduces more than 30%.

Description of drawings

Fig. 1 is the embodiment schematic diagram of the utility model technique and apparatus system flow process;

Fig. 2 is the floor map of the utility model technique and device embodiment;

Fig. 3 is the A-A sectional view of Fig. 2;

Fig. 4 ~ 8, it is the embodiment schematic diagram of the utility model high-density hollow aerating apparatus, wherein Fig. 4 is the back-shaped laying mounting means of high-density hollow aeration tube schematic diagram, Fig. 5 is the portable mounting means schematic diagram of high-density hollow aeration tube, and Fig. 6, Fig. 7 and Fig. 8 are respectively high-density hollow aerating apparatus aeration tube connector vertical view, A to view and B to view.

Fig. 9 ~ 12, it is the embodiment schematic diagram of the ring-like aerating system of the utility model high-density, wherein Fig. 9 is that the ring-like aeration tube annular of high-density is laid the mounting means schematic diagram, Figure 10 is the portable mounting means schematic diagram of the ring-like aeration tube of high-density, and Figure 11 is that schematic diagram, Figure 12 of the ring-like aeration tube head and the tail of high-density connector is the schematic diagram of connector in the ring-like aeration pipe ring of high-density.

The explanation of each mark in accompanying drawing:

1-online the under meter of intaking, the online COD instrument of 2-water inlet, 3-biochemistry pool, the 4-the first lattice aeration zone, 5-functional partition wall, 6-functional partition wall hole, the 7-the second lattice aeration zone, 8-device for separating mud and water, the online COD instrument of 9-water outlet, the 10-the first lattice high-density winding type aerating apparatus, the 11-the second lattice high-density winding type aerating apparatus, 12-pneumatic lifter, 13-the first online dissolved oxygen meter in lattice aeration zone, 14-the second online dissolved oxygen meter in lattice aeration zone, 15-the first blower fan, 16-the first air duct pressure transmitter, 17-the-airduct electrically operated valve, 18-the-blower fan PLC Controlling System, the 19-the second blower fan, the 20-the second air duct pressure transmitter, the 21-the second airduct electrically operated valve, the 22-the second blower fan PLC Controlling System, 23-vertical blast pipe valve, 24-vertical blast pipe loose joint, 25-vertical blast pipe, 26-bottom airduct, 27-aeration tube, 28-high-density hollow aerating apparatus connector, the ring-like aerating apparatus head and the tail of 29-high-density connector, connector in the middle of the ring-like aerating apparatus of 30-high-density, the portable framework of 31-high-density hollow aerating apparatus, the portable framework of the ring-like aerating apparatus of 32-high-density, 33-aeration tube press strip, 34-connector anchor ear.

Embodiment

In order better to understand the technical solution of the utility model, set forth below in conjunction with embodiment:

See also Fig. 1, Fig. 1 is the embodiment schematic diagram of the utility model technique and apparatus system flow process.Diagram reflection high-concentration waste water COD and N are in the flow process ofbiochemistry pool 3 interior degradeds: waste water mixes inflow afterwards the firstlattice aeration zone 4 with backflow mixed liquor, then flow into the second lattice aeration zone 7 by functional partition wall 5, the mixed solution of the second lattice aeration zones 7 ends is back to the firstlattice aeration zones 4 feed-water ends by pneumatic lifter 12, partially mixed liquid filters through muddy watermembrane separation unit 8, clear water effluxes, concentrated solution is back to the firstlattice aeration zones 4 feed-water ends, and the small portion concentrated solution enters the sludge disposal system.

See also Fig. 2 and Fig. 3, Fig. 2 is the floor map of the utility model technique and device embodiment, and Fig. 3 is the A-A sectional view of Fig. 2, and Fig. 2 and Fig. 3 reflect that the system of the utility model technique and device forms and engineering is arranged.

The Pollutant monitoring system: the monitor signal of intake online undermeter 1 and theonline COD instrument 2 of water inlet can reflect the water inlet total amount of pollutant, and the monitor signal of the online COD instrument 9 of water outlet is representing the water outlet total amount of pollutant.

Biochemistry pool 3:biochemistry pool 3 has the firstlattice aeration zone 4 and the second lattice aeration zone 7, and adopts different low dissolved oxygens to control.

The first lattice aeration zone 4: waste water adopts the multiple spot water distribution evenly to mix with backflow mixed liquor at the feed-water end of the firstlattice aeration zone 4, the first lattice high-density windingtype aerating apparatus 10 is installed at the bottom of the pond, the first online dissolvedoxygen meter 13 in lattice aeration zone, dissolved oxygen scope 0.1 ~ 0.5mg/L are installed in the pond.

Functional partition wall 5: functional partition wall 5 is divided into two lattice with the aeration zone, the mixed solution of the firstlattice aeration zone 4 flows to the second lattice aeration zone 7 through functional partition wall hole 6 and carries out aerated reaction again, during concrete enforcement, functional partition wall 5 can utilize the structural partition wall ofbiochemistry pool 3.

The second lattice aeration zone 7: the second lattice high-density windingtype aerating apparatus 11 is installed at the bottom of the pond, the second online dissolvedoxygen meter 14 in lattice aeration zone is installed in the pond, the dissolved oxygen of the second lattice aeration zone 7 suitably improves than the firstlattice aeration zone 4, during concrete enforcement, can calculate in conjunction with wastewater property and mathematical formula of the present utility model, preferred 0.1 ~ 1.8mg/L can do corresponding correction whenbiochemistry pool 3 operation debugging.

Mixed-liquor return: the available depth 5 ~ 6m of aeration zone, the water level of the second lattice aeration zones 7 ends is than the low 0.1～0.3m of feed-water end water level of the firstlattice aeration zone 4, therefore the mixed-liquor return lift height is very little, the pneumatic lifter 12 of employing take air as power has larger advantage, and device can adopt stripping tube, the gentle device etc. that gushes of airlift pump.In the specific implementation, reflux ratio can be calculated in conjunction with wastewater property and mathematical formula of the present utility model, in debugging and when operation, can control quantity of reflux and reflux ratio by adjusting air intake valve, also can adjust quantity of reflux and reflux ratio by the water quality that detects the firstlattice aeration zones 4 feed-water ends.

High-density winding type aeration: be provided with the first lattice high-density windingtype aerating apparatus 10 and the second lattice high-density windingtype aerating apparatus 11 in thisbiochemistry pool 3 bottoms, be connected with thesecond blower fan 19 with the first blower fan 15 respectively, regulate the first airduct electrically operatedvalve 17, the second airduct electrically operatedvalve 21, vertical blast pipe valve 23 can be adjusted aeration rate, dismantle vertical blast pipe loose joint 24 and can promote high-density winding type aerating apparatus, realize on-line maintenance.

Mud-water separation: mud-water separation can adopt the method for inclined tube and swash plate clarification, preferred ultrafiltration membrance filter.The mixed solution of the second lattice aeration zones 7 ends rises to device for separating mud andwater 8 with water pump, and the pump sump mouth is positioned at water level top.Ultra-filtration membrane clear water COD is stable, and concentrated solution is back to the firstlattice aeration zones 4 feed-water ends, and small part is discharged to the sludge disposal system outward.

Air feed and dissolved oxygen automatic control: dissolved oxygen adopts automation control method, sets up two and overlaps independently the PLC system and control respectively two lattice aeration zones dissolved oxygens.The first lattice aeration zone 4 is because the dissolved oxygen modification scope is relatively fixing, therefore the first blower fan PLC system 18 mainly controls the air quantity of the first blower fan 15 according to the first online dissolved oxygen meter 13 signals in lattice aeration zone, and its corresponding device of controlling has: the first online dissolved oxygen meter 13 in lattice aeration zone, the first blower fan 15, the first air duct pressure transmitter 16, the first airduct electrically operated valve 17 etc.; The second lattice aeration zones 7 dissolved oxygen modification scopes are relatively large, and be subject to the influence of fluctuations of the water yield and water quality, the second blower fan PLC system 22 mainly controls the air quantity of the second blower fan 19 according to signals such as the second online dissolved oxygen meter 14 in lattice aeration zone, the online under meter 1 of water inlet, the online COD instrument 2 of water inlet, the online COD instrument 9 of water outlet, its corresponding control device has: the second online dissolved oxygen meter 14 in lattice aeration zone, the second blower fan 19, the second air duct pressure transmitter 20, the second airduct electrically operated valve 21, the online under meter 1 of water inlet, the online COD instrument 2 of water inlet, the online COD instrument 9 of water outlet etc.

Fig. 4 ~ Fig. 8 is the high-density hollow aerating apparatus embodiment schematic diagram of the utility model technique and device, comprise the back-shaped aeration tube paving mode of high-density hollow aerating apparatus, the portable mounting means of high-density hollow aerating apparatus, high-density hollow aerating apparatus assembly mounting means etc.

Theaeration tube 27 of high-density hollow aerating apparatus is high-density arrangement, spacing 100 ~ 200mm; Bottom airduct 26 and four limit shaped steel that two of bottoms intersection is communicated with form hollow aeration tube frameworks,vertical blast pipe 25 onairduct 26 corners, bottom is connected withblower fan 15,19, on theairduct 26 of bottom, the interval arranges several high-density hollowaerating apparatus connectors 28, form the corner of hollows with equidistant four the high-density hollowaerating apparatus connectors 28 inbottom airduct 26 centers, high-density hollowaerating apparatus connector 28 1 ends are communicated withbottom airduct 26, two ends connectaeration tube 27, fixing withconnector anchor ear 34, and form back-shaped aeration coil structures.

Bottom airduct 26 and four limit shaped steel that two of bottoms intersection is communicated with form hollow aeration tube frameworks, be combined into theportable framework 31 of high-density hollow aerating apparatus withvertical blast pipe 25, close vertical blast pipe valve 23 when concrete enforcement maintenance, remove blast pipe slip-knot 24, theportable framework 31 of high-density hollow aerating apparatus can be keeped in repair, do not affect other facility operation, can realize on-line maintenance.

Fig. 9 ~ 12nd, the ring-like aerating apparatus embodiment of the high-density of the utility model technique and device schematic diagram, comprise the ring-like aerating apparatus annular of high-density aeration tube paving mode, the portable mounting means of the ring-like aerating apparatus of high-density, the ring-like aerating apparatus assembly of high-density mounting means etc.

Theaeration tube 27 of the ring-like aerating apparatus of high-density is high-density arrangement, spacing 100 ~ 200mm, two of bottoms intersection shaped steel and four limit shaped steel form annular aeration tube frameworks, annular aeration circle nook is admission, admission is installed the ring-like aerating apparatus head and the tail of high-density connector 29, themiddle connector 30 of the ring-like aerating apparatus of high-density, avertical blast pipe 25 of end welding ofconnector 30 in the middle of the ring-like aerating apparatus head and the tail of high-density connector 29, the ring-like aerating apparatus of high-density, another two ends connectaeration tube 27, and are fixing withconnector anchor ear 34.

Two of bottoms intersection shaped steel and four limit shaped steel form annular aeration tube frameworks, be combined into theportable framework 32 of the ring-like aerating apparatus of high-density withvertical blast pipe 25, close vertical blast pipe valve 23 when concrete enforcement maintenance, remove blast pipe slip-knot 24, theportable framework 32 of the ring-like aerating apparatus of high-density can be keeped in repair, do not affect other facility operation, can realize on-line maintenance.

Theaeration tube 27 of high-density winding type aerating apparatus adopts 33 compactings of aeration tube press strip, aerationtube press strip 33 spacing 500 ~ 800mm, and aerationtube press strip 33 2 ends are connected with four limits of aeration tube framework, aerationtube press strip 33 and aeration tube outer wall spacing 20 ~ 40mm.

Utilize technique of the present utility model and device to carry out actual waste water and process practice, concrete case:

Example 1: certain printing and dyeing mill's reactive printing wastewater treatment, waste water COD and total nitrogen concentration are high, and former treatment process is " equalizing tank+flocculation sedimentation tank+anaerobic pond+Aerobic Pond+flocculation sedimentation tank ", processes water outlet COD_CrNot up to standard with ammonia nitrogen, use the utility model and carry out the technique adjustment.

Technical process: equalizing tank+with the pond of synchronously degrading, pond.

Technique and device parameter: high-density hollow aeration; First lattice aeration zone dissolved oxygen scope 0.2 ~ 0.5mg/L, biochemical 12 hours residence time, second lattice aeration zone dissolved oxygen scope 0.3 ~ 0.9mg/L, biochemical 63 hours residence time; Biochemistry pool aeration zone MLSS 6300 ~ 6900mg/L; Mixed-liquor return equipment is the air lift water pump, 60 times of reflux ratios; Mud-water separation adopts inclined tube clarification, water outlet COD_CrReach " integrated wastewater discharge standard " three grades of emission standards and " sewage enters the town sewer water quality standard " C grade emission standard (CJ343-2010) (GB8978-1996) with ammonia nitrogen.

Before and after technique is adjusted, water-quality ratio is referring to table 1.

Certain high-concentration waste water COD of printing and dyeing mill of table 1 and N are with the comparison of the synchronous degradation technique in pond and former art breading

Analytical table 1, the utility model is when the reactive printing waste water of processing high concentration COD and N and depositing:

(1) ammonia nitrogen removal frank 99%, and water outlet is up to standard, shows that ammonia nitrogen degradation efficient of the present utility model is high;

(2) nitrogen removal rate 82%, and water outlet is up to standard, shows that the performance of synchronous nitration and denitrification of the present utility model is very strong, and the total nitrogen degradation efficiency is high;

(3) COD_CrClearance 95%, water outlet is up to standard, shows to the utlity model has COD and N with the synchronous degradation function in pond;

(4) in the water outlet total nitrogen, nitrite nitrogen only accounts for 0.2%, shows in the utility model technological process, there is no nitrite accumulation, has that half way is nitrated, the function of short-cut nitrification and denitrification;

(5) show that the utility model sludge quantity reduces 40%.

Example 2: certain Bean Products Factory's wastewater treatment, waste water COD and total nitrogen concentration are high, and former treatment process is " preliminary sedimentation tank+anaerobic pond+Aerobic Pond+air flotation pool ", and the water outlet ammonia nitrogen exceeds standard, and uses the utility model and carries out the technique adjustment.

Technical process: equalizing tank+with the pond of synchronously degrading, pond.

Technique and device parameter: high-density hollow aeration, first lattice aeration zone dissolved oxygen scope 0.2 ~ 0.5mg/L, biochemical 10 hours residence time, second lattice aeration zone dissolved oxygen scope 0.3 ~ 1.2mg/L, biochemical 86 hours residence time, aeration zone MLSS 7400 ~ 8360mg/L, mixed-liquor return equipment is the air lift water pump, 106 times of reflux ratios, mud-water separation adopts tubular ultra-filtration membrane, and effluent quality reaches " integrated wastewater discharge standard " primary standard (GB8978-1996).

Before and after technique is adjusted, water-quality ratio is referring to table 2.

Certain Bean Products Factory's waste water COD of table 2 and N are with the comparison of the synchronous degradation technique in pond and former art breading

Analytical table 2 shows that the utility model technique is when the soybean wastewater of processing high concentration COD and N and depositing:

(1) ammonia nitrogen removal frank 98%, and water outlet is up to standard, shows that the utility model ammonia nitrogen degradation efficient is high;

(2) nitrogen removal rate 92%, and water outlet is up to standard, shows that the performance of the utility model synchronous nitration and denitrification is very strong, and the total nitrogen degradation efficiency is high;

(3) COD_CrClearance 98%, water outlet is up to standard, shows to the utlity model has COD and N with the synchronous degradation function in pond;

(4) show that the utility model sludge quantity reduces 70%.

(5) show that the utility model working cost reduces 32%.

The utility model is not limited to above-mentioned embodiment; no matter do any variation on its shape or material formation; every employing structure design provided by the utility model is all a kind of distortion of the present utility model, all should think within the utility model protection domain.

Claims (4)

1. a high-concentration waste water COD and N are with the synchronous decomposition apparatus in pond, it is characterized in that: this device mainly comprises biochemistry pool (3), be provided with the first lattice high-density winding type aerating apparatus (10) and the second lattice high-density winding type aerating apparatus (11) bottom this biochemistry pool (3), the first lattice high-density winding type aerating apparatus (10) is connected with the second blower fan (19) with the first blower fan (15) respectively with the second lattice high-density winding type aerating apparatus (11), functional partition wall (5) is set in this biochemistry pool (3) biochemistry pool (3) is divided into the first lattice aeration zones (4) and the second lattice aeration zones (7), be provided with the hole (6) that is communicated with the first lattice aeration zones (4) and the second functional partition wall in lattice aeration zones (7) in the bottom of functional partition wall (5), be provided with the pneumatic lifter (12) of mixed-liquor return in the second lattice aeration zones (7), be used for the mixed solution part of the second lattice aeration zones (8) end is back to the first lattice aeration zones (4) feed-water end, the second lattice aeration zones (7) are connected with device for separating mud and water (8) by water pump.

2. high-concentration waste water COD according to claim 1 and N are with the synchronous decomposition apparatus in pond, it is characterized in that: the aeration tube (27) of described the first lattice high-density winding type aerating apparatus (10) and the second lattice high-density winding type aerating apparatus (11) is selected the back-shaped layout of high-density, the bottom airduct (26) that two of bottoms intersection is communicated with forms hollow aeration tube frameworks with four limit shaped steel, vertical blast pipe (25) on airduct (26) corner, bottom is connected with blower fan, the upper interval of bottom airduct (26) arranges several high-density hollow aerating apparatus connectors (28), four the high-density hollow aerating apparatus connectors (28) equidistant with bottom airduct (26) center form back-shaped corner, high-density hollow aerating apparatus connector (28) one ends are communicated with bottom airduct (26), two ends connect aeration tube (27), fixing with connector anchor ear (34), and form back-shaped aeration coil structures.

3. high-concentration waste water COD according to claim 1 and N are with the synchronous decomposition apparatus in pond, it is characterized in that: the aeration tube (27) of described the first lattice high-density winding type aerating apparatus (10) and the second lattice high-density winding type aerating apparatus (11) selects high-density to be circular layout, two of bottoms intersection shaped steel and four limit shaped steel form annular aeration tube frameworks, annular aeration circle nook is admission, admission is installed connector (29, 30), connector (29, 30) an end welding vertical blast pipe (25), another two ends connect aeration tube (27), fixing with connector anchor ear (34).

4. according to claim 2 or 3 described high-concentration waste water COD and N with the synchronous decomposition apparatus in pond, is characterized in that: be provided with aeration tube press strip (33) on described aeration tube (27), aeration tube press strip (33) two ends are connected with four limits of aeration tube framework.

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