CN101700951A - Emulsified liquid waste water treatment method - Google Patents

Abstract

The invention discloses an emulsified liquid waste water treatment method; in the method, active life sludge culture is carried out to domestic sewage, the life sludge generated in the domestic sewage treatment process is utilized to carry out adsorption treatment to pollutants of the emulsified liquid waste water, so as to skillfully use nutritive materials in the domestic sewage and the active sludge generated in the domestic sewage treatment process. Heating treatment and the operation of feeding the combination of lime milk and polyacrylamide PAM are carried out in the emulsified liquid breaking and solid-liquid separation links, aluminium polychlorid or polyferric sulfate or other coagulant is not used, the sludge amount is less and the solid-liquid separation effect is good when sedimentation is carried out. A chemical method, a microorganism method and a physical method are systematically combined, by adopting skillful process combination and on the basis of low cost operation, the oil content of the generated solid sludge is low, so as not to need to treat the solid sludge as hazardous waste and lead the emulsified liquid waste water to reach the three-level discharge standard requirements of GB8978-1996 integrated wastewater discharge standard.

Description

A kind of emulsified liquid waste water treatment method

Affiliated technical field

The present invention relates to a kind of emulsified liquid waste water treatment method, the method of the emulsifying liquid waste water that especially a kind of process metal surfaces processing and mechanical processing industry produce, the emulsifying liquid waste water processing aspect that it can be used for metal finishing belongs to environmental engineering and water-treatment technology field.

Background technology

Its principal pollutant composition of emulsifying liquid waste water is mineral oil, emulsifying agent, releasing agent and rust-preventive agent etc., also contains the nitrite of part simultaneously.Outward appearance is milky white dark yellow, and the intensive rotten odor is arranged.

The treatment process of this waste water is divided three classes chemical method, microbial method and physics method at present.

Wherein:

Chemical process is broadly divided into combustion method, displacement development, coagulation method and acidization etc., the most frequently used is the chemical agent breakdown of emulsion, dosing coagulant polymerize aluminum chloride PAC or bodied ferric sulfate PFS etc. then, add flocculation agents such as polyacrylamide PAM etc. again, the drawback of present method is that sludge quantity is big, treatment effect is undesirable, and can't reach the emission request of three grades of emission standards of GB8978-1996 " integrated wastewater discharge standard ".

Microbial method, mostly be chemical method in conjunction with common sewage biochemical processing process, as carry out anaerobic biological treatment and aerobic biological treatment, when but biochemical process is handled waste water, usually the ratio that requires to answer biochemical oxygen demand (BOD) BOD value and chemical oxygen demand COD value is greater than 0.3, the BOD value is very low in the emulsifying liquid waste water, and the COD value is high comparatively speaking, differs ten to tens times.Microorganism growth is difficulty very, and add nutritive substances such as a large amount of carbonaceous organic materials of people, nitrogen, phosphorus, the material of emulsifying liquid waste water the inside has certain toxicity or other disadvantageous effect to microorganism in addition, suppresses microbial growth, so emulsifying liquid waste water should not directly adopt microbial method to handle.

The physics method, be broadly divided into methods such as gravity separation, centrifugation, concentrating and separating, membrane sepn, separated from solvent and fractionation by adsorption, wherein treatment effect is relatively good comparatively speaking for membrane separation process, but the concentrated liquid measure that membrane sepn produces is big and intractability is very big, other several physics method treat effluent effects are all bad, are difficult to reach the emission request of three grades of emission standards of GB8978-1996 " integrated wastewater discharge standard ".

Summary of the invention

The present invention organically combines chemical method, microbial method and physics method, combination is handled in sanitary sewage disposal and emulsifying liquid waste water, cultivate and activated sludge absorption by oily water separation, chemical demulsification, gravity separation, active sludge microorganism, carrying out process integrations such as anaerobic biological treatment and aerobic biological treatment again handles emulsifying liquid waste water, final emulsifying liquid waste water water outlet reaches emission request or reuse water requirement, this invention, by rational combination, the absorption property running cost that makes full use of active sludge is low, treatment effect is good, and sludge quantity is few.

Implementation method of the present invention is as follows:

At first sanitary sewage and emulsifying liquid waste water are introduced different equalizing tank sanitary sewage equalizing tank 1 and emulsifying liquid waste water equalizing tank 3 respectively.

A sanitary sewage part enters in the aerobic biochemical process sanitary sewage disposal unit 2 carries out biochemical treatment, and main purpose is to carry out active sludge microorganism to cultivate, and a sanitary sewage part enters emulsion anaerobic biological treatment unit 8.

4 pairs of emulsifying liquid waste waters carry out oily water separation to emulsifying liquid waste water in the oily water separation unit, oily substance enters 12 pairs of waste oil of oil storage unit and collects, emulsifying liquid waste water through oily water separation enters breakdown of emulsion and solid-liquid separation unit 5, the clear liquid of breakdown of emulsion and solid-liquid separation unit enters pH adjustment unit 6, the emulsifying liquid waste water of adjusting through pH enters activated sludge absorption processing unit 7, the emulsifying liquid waste water clear liquid of handling through activated sludge absorption enters anaerobic biological treatment unit 8, clear liquid after anaerobic biological treatment enters aerobe processing unit 9, and the clear liquid after aerobe is handled enters discharging pond 10.

The mud that aerobic biochemical process sanitary sewage disposal unit 2, breakdown of emulsion and solid-liquid separation unit 5, activated sludge absorption processing unit 7, anaerobic biological treatment unit 8, aerobe processing unit 9 produce enters mud and concentrates anddewatering unit 11.

Innovative point of the present invention mainly contains as follows:

1, carrying out active domestic sludge with sanitary sewage cultivates, utilize the domestic sludge that produces in the sanitary sewage disposal process that the pollution substance of emulsifying liquid waste water is carried out adsorption treatment, the active sludge that produces in nutritive substance in the ingenious use sanitary sewage and the sanitary sewage disposal process.

2, use heat treated and add milk of lime and polyacrylamide PAM combination at emulsion breakdown of emulsion and solid-liquid separation link, do not use coagulating agent such as polymerize aluminum chloride or bodied ferric sulfate, sludge quantity is few, good effect of separating solid from liquid during precipitation.

3, the present invention has organically combined chemical method, microbial method and physics method, ingenious combination by technology, moving on the basis cheaply, the solid mud oleaginousness that produces is low, need not dispose, and make emulsifying liquid waste water reach the emission request of three grades of emission standards of GB8978-1996 " integrated wastewater discharge standard " according to danger wastes.

Description of drawings

A kind of process flow diagram of handling the emulsifying liquid waste water method of Fig. 1

Among the figure: 1. sanitary sewage equalizing tank; 2. aerobic biochemical process sanitary sewage disposal unit; 3. emulsifying liquid waste water equalizing tank; 4. oily water separation unit; 5. breakdown of emulsion and solid-liquid separation unit; 6.pH adjustment unit; 7. activated sludge absorption processing unit; 8. anaerobic biological treatment unit; 9. aerobe processing unit; 10. discharging pond; 11. mud concentrates and dewatering unit; 12. oil storage unit.

Embodiment

The present invention will be further described below in conjunction with drawings and Examples.

As shown in Figure 1, at first sanitary sewage and emulsifying liquid waste water are introduced different equalizing tank sanitary sewage equalizing tank 1 and emulsifying liquid waste water equalizing tank 3 respectively, introduce the water yield of sanitary sewage and the water yield of emulsifying liquid waste water and can be controlled in certain proportional range, promptly the water yield ratio of the water yield of sanitary sewage and emulsifying liquid waste water generally should be greater than 2: 1.

A sanitary sewage part enters in the aerobic biochemical process sanitary sewage disposal unit 2 carries out biochemical treatment, the sanitary sewage amount that enters this processing unit is determined according to the treatment capacity of emulsifying liquid waste water, the water yield of control sanitary sewage is more than 1 times of activated sludge absorption processing unit 7 emulsifying liquid waste water flooding quantitys, this processing unit is common domestic sewage treatment process, can be that sequencing batch active sludge also can be other sewage activated sludge method commonly used, sanitary sewage is handled through aeration and biological, the sanitary sewage chemical oxygen demand COD is reduced to below the 100mg/l by influent concentration, this processing unit main purpose is to carry out active sludge microorganism to cultivate, the active sludge excess sludge of cultivating all enters activated sludge absorption processing unit 7, for the activated sludge absorption processing unit provides active sludge.A sanitary sewage part enters emulsion anaerobic biological treatment unit 8, and the sanitary sewage water yield that enters emulsion anaerobic biological treatment unit 8 is to enter more than 0.5 times of this unitary emulsifying liquid waste water amount.

4 pairs of emulsifying liquid waste waters carry out oily water separation to emulsifying liquid waste water in the oily water separation unit, oily substance enters 12 pairs of waste oil of oil storage unit and collects, emulsifying liquid waste water through oily water separation enters breakdown of emulsion and solid-liquid separation unit 5, in emulsion breakdown of emulsion and solid-liquid separation unit 5 during breakdown of emulsion, in emulsion, add the milk of lime of calcium hydroxide preparation, it is 100mg/l-2000mg/l that calcium hydroxide gets consumption, more than the pH regulator to 10; Clear liquid after the solid-liquid separation enters pH adjustment unit 6 afterwards, utilize hydrochloric acid or sulfuric acid that pH is adjusted into 6-9, the emulsifying liquid waste water of adjusting through pH enters activated sludge absorption processing unit 7, in activated sludge absorption processing unit 7 by aerobic biochemical process sanitary sewage disposal unit 2 in the row active sludge and the emulsion of coming stir, alr mode can be a pneumatic blending, waterpower stirs or mechanical stirring, reaction times is 5 minutes-120 minutes, reaction is after solid-liquid separation, the emulsifying liquid waste water clear liquid enters anaerobic biological treatment unit 8, mix with the sanitary sewage that enters anaerobic biological treatment unit 8 and to carry out anaerobic biological treatment, clear liquid after anaerobic biological treatment enters aerobe processing unit 9, emulsion clear liquid COD concentration after aerobe is handled is reduced to below the 500mg/l, reach the emission request of three grades of emission standards of GB8978-1996 " integrated wastewater discharge standard ", the waste water that reaches emission request enters discharging pond 10.

The mud that aerobic biochemical process sanitary sewage disposal unit 2, breakdown of emulsion and solid-liquid separation unit 5, activated sludge absorption processing unit 7, anaerobic biological treatment unit 8, aerobe processing unit 9 produce enters mud and concentrates anddewatering unit 11, and the sewage backflow that mud concentrates anddewatering unit 11 produces is handled to aerobic biochemical process sanitary sewage disposal unit 2.

Specific embodiment

Embodiment 1

Wuxi City mechanical fitting manufacturing enterprise workshop produces emulsifying liquid waste water in process of production, this emulsifying liquid waste water COD15780mg/l, pH6.7, mineral oil content 1200mg/l, the water yield is 0.8 ton/day, for handling emulsifying liquid waste water, other utilizes 1.6 tons/day in this enterprise's daily life sewage, sanitary sewage water-quality COD 326mg/l, pH6.9, wherein sanitary sewage enters in the aerobic biochemical process sanitary sewage disposal unit 2 0.8 ton/day, enters in the anaerobic biological treatment unit 8 0.8 ton/day.Emulsion water quality after oily water separation is COD7636mg/l, at breakdown of emulsion and solid-liquid separation unit calcium hydroxide consumption is 1000mg/l, be heated to 50 ℃, 10 minutes stirring reaction time, by the time during normal temperature, add PAM10mg/l, 10 minutes stirring reaction time, through precipitating 1 hour, supernatant C OD reduces to 3105mg/l, clear liquid enters pH adjustment unit 6, utilize hydrochloric acid that pH is adjusted into 6-9, supernatant liquor enters in the activated sludge absorption processing unit 7, mixes with the active sludge of coming in, adopted aeration agitation 10 minutes, precipitate that supernatant C OD reduces to 2427mg/l after 1 hour, supernatant liquor enters in the anaerobic biological treatment unit 8, mixes with sanitary sewage in entering anaerobic biological treatment unit 8, hydraulic detention time is 16 hours, supernatant C OD will be 849mg/l, and supernatant liquor enters aerobe processing unit 9, hydraulic detention time 8 hours, COD will be 384mg/l, reach the emission request of three grades of emission standards of GB8978-1996 " integrated wastewater discharge standard ".

Embodiment 2

Wuxi City mechanical fitting manufacturing enterprise workshop produces emulsifying liquid waste water in process of production, this emulsifying liquid waste water COD15780mg/l, pH6.7, mineral oil content 1200mg/l, the water yield is 0.8 ton/day, for handling emulsifying liquid waste water, other utilizes 3.2 tons/day in this enterprise's daily life sewage, sanitary sewage water-quality COD 326mg/l, pH6.9, wherein sanitary sewage enters in the aerobic biochemical process sanitary sewage disposal unit 2 1.6 tons/day, enters in the anaerobic biological treatment unit 8 1.6 tons/day.Emulsion water quality after oily water separation is COD7636mg/l, at breakdown of emulsion and solid-liquid separation unit calcium hydroxide consumption is 1000mg/l, be heated to 50 ℃, 10 minutes stirring reaction time, by the time during normal temperature, add PAM5mg/l, 10 minutes stirring reaction time, through precipitating 1 hour, supernatant C OD reduces to 3105mg/l, clear liquid enters pH adjustment unit 6, utilize sulfuric acid that pH is adjusted into 6-9, supernatant liquor enters in the activated sludge absorption processing unit 7, mixes with the active sludge of coming in, adopted aeration agitation 10 minutes, precipitate that supernatant C OD reduces to 1873mg/l after 1 hour, supernatant liquor enters in the anaerobic biological treatment unit 8, mixes with sanitary sewage in entering anaerobic biological treatment unit 8, hydraulic detention time is 16 hours, supernatant C OD will be 464mg/l, and supernatant liquor enters aerobe processing unit 9, hydraulic detention time 8 hours, COD will be 237mg/l, reach the emission request of three grades of emission standards of GB8978-1996 " integrated wastewater discharge standard ".

Embodiment 3

Wuxi City mechanical fitting manufacturing enterprise workshop produces emulsifying liquid waste water in process of production, this emulsifying liquid waste water COD15780mg/l, pH6.7, mineral oil content 1200mg/l, the water yield is 0.8 ton/day, for handling emulsifying liquid waste water, other utilizes 3.2 tons/day in this enterprise's daily life sewage, sanitary sewage water-quality COD 326mg/l, pH6.9, wherein sanitary sewage enters in the aerobic biochemical process sanitary sewage disposal unit 2 1.6 tons/day, enters in the anaerobic biological treatment unit 8 1.6 tons/day.Emulsion water quality after oily water separation is COD7636mg/l, at breakdown of emulsion and solid-liquid separation unit calcium hydroxide consumption is 1000mg/l, 30 minutes stirring reaction time, by the time during normal temperature, add PAM15mg/l, 10 minutes stirring reaction time, through staticly settling 2 hours, supernatant C OD reduces to 2971mg/l, and clear liquid enters pH adjustment unit 6, utilizes hydrochloric acid that pH is adjusted into 6-9, supernatant liquor enters in the activated sludge absorption processing unit 7, mix with the active sludge of coming in, adopted aeration agitation 10 minutes, precipitate that supernatant C OD reduces to 1646mg/l after 1 hour, supernatant liquor enters in the anaerobic biological treatment unit 8, mix with the sanitary sewage in entering anaerobic biological treatment unit 8, hydraulic detention time is 16 hours, and supernatant C OD will be 495mg/l, supernatant liquor enters aerobe processing unit 9, hydraulic detention time 8 hours, COD will be 325mg/l, reach the emission request of three grades of emission standards of GB8978-1996 " integrated wastewater discharge standard ".

Embodiment 4

Wuxi City mechanical fitting manufacturing enterprise workshop produces emulsifying liquid waste water in process of production, this emulsifying liquid waste water COD15780mg/l, pH6.7, mineral oil content 1200mg/l, the water yield is 0.8 ton/day, for handling emulsifying liquid waste water, other utilizes 3.2 tons/day in this enterprise's daily life sewage, sanitary sewage water-quality COD 326mg/l, pH6.9, wherein sanitary sewage enters in the aerobic biochemical process sanitary sewage disposal unit 2 1.6 tons/day, enters in the anaerobic biological treatment unit 8 1.6 tons/day.Emulsion water quality after oily water separation is COD7636mg/l, at breakdown of emulsion and solid-liquid separation unit calcium hydroxide consumption is 2000mg/l, 10 minutes stirring reaction time, by the time during normal temperature, add PAM50mg/l, 10 minutes stirring reaction time, through precipitating 1 hour, supernatant C OD reduces to 2651mg/l, and clear liquid enters pH adjustment unit 6, utilizes sulfuric acid that pH is adjusted into 6-9, supernatant liquor enters in the activated sludge absorption processing unit 7, mix with the active sludge of coming in, adopted aeration agitation 10 minutes, precipitate that supernatant C OD reduces to 1873mg/l after 1 hour, supernatant liquor enters in the anaerobic biological treatment unit 8, mix with the sanitary sewage in entering anaerobic biological treatment unit 8, hydraulic detention time is 16 hours, and supernatant C OD will be 464mg/l, supernatant liquor enters aerobe processing unit 9, hydraulic detention time 8 hours, COD will be 237mg/l, reach the emission request of three grades of emission standards of GB8978-1996 " integrated wastewater discharge standard ".

Embodiment 5

Wuxi City mechanical fitting manufacturing enterprise workshop produces emulsifying liquid waste water in process of production, this emulsifying liquid waste water COD15780mg/l, pH6.7, mineral oil content 1200mg/l, the water yield is 0.8 ton/day, for handling emulsifying liquid waste water, other utilizes 3.2 tons/day in this enterprise's daily life sewage, sanitary sewage water-quality COD 326mg/l, pH6.9, wherein sanitary sewage enters in the aerobic biochemical process sanitary sewage disposal unit 2 1.6 tons/day, enters in the anaerobic biological treatment unit 8 1.6 tons/day.Emulsion water quality after oily water separation is COD7636mg/l, at breakdown of emulsion and solid-liquid separation unit calcium hydroxide consumption is 500mg/l, 10 minutes stirring reaction time, by the time during normal temperature, add PAM20mg/l, 10 minutes stirring reaction time, through precipitating 1 hour, supernatant C OD reduces to 2651mg/l, and clear liquid enters pH adjustment unit 6, utilizes hydrochloric acid that pH is adjusted into 6-9, supernatant liquor enters in the activated sludge absorption processing unit 7, mix with the active sludge of coming in, adopted aeration agitation 10 minutes, precipitate that supernatant C OD reduces to 1382mg/l after 1 hour, supernatant liquor enters in the anaerobic biological treatment unit 8, mix with the sanitary sewage in entering anaerobic biological treatment unit 8, hydraulic detention time is 10 hours, and supernatant C OD will be 978mg/l, supernatant liquor enters aerobe processing unit 9, hydraulic detention time 6 hours, COD will be 409mg/l, reach the emission request of three grades of emission standards of GB8978-1996 " integrated wastewater discharge standard ".

Embodiment 6

Wuxi City mechanical fitting manufacturing enterprise workshop produces emulsifying liquid waste water in process of production, this emulsifying liquid waste water COD15780mg/l, pH6.7, mineral oil content 1200mg/l, the water yield is 0.8 ton/day, for handling emulsifying liquid waste water, other utilizes 8.0 tons/day in this enterprise's daily life sewage, sanitary sewage water-quality COD 326mg/l, pH6.9, wherein sanitary sewage enters in the aerobic biochemical process sanitary sewage disposal unit 2 5.6 tons/day, enters in the anaerobic biological treatment unit 8 2.4 tons/day.Emulsion water quality after oily water separation is COD7636mg/l, at breakdown of emulsion and solid-liquid separation unit calcium hydroxide consumption is 100mg/l, 10 minutes stirring reaction time, by the time during normal temperature, add PAM5mg/l, 10 minutes stirring reaction time, through precipitating 1 hour, supernatant C OD reduces to 2651mg/l, and clear liquid enters pH adjustment unit 6, utilizes hydrochloric acid that pH is adjusted into 6-9, supernatant liquor enters in the activated sludge absorption processing unit 7, mix with the active sludge of coming in, adopted aeration agitation 10 minutes, precipitate that supernatant C OD reduces to 1582mg/l after 1 hour, supernatant liquor enters in the anaerobic biological treatment unit 8, mix with the sanitary sewage in entering anaerobic biological treatment unit 8, hydraulic detention time is 10 hours, and supernatant C OD will be 477mg/l, supernatant liquor enters aerobe processing unit 9, hydraulic detention time 6 hours, COD will be 305mg/l, reach the emission request of three grades of emission standards of GB8978-1996 " integrated wastewater discharge standard ".

Embodiment 7

Wuxi City mechanical fitting manufacturing enterprise workshop produces emulsifying liquid waste water in process of production, this emulsifying liquid waste water COD15780mg/l, pH6.7, mineral oil content 1200mg/l, the water yield is 0.8 ton/day, for handling emulsifying liquid waste water, other utilizes 8.0 tons/day in this enterprise's daily life sewage, sanitary sewage water-quality COD 326mg/l, pH6.9, wherein sanitary sewage enters in the aerobic biochemical process sanitary sewage disposal unit 24 tons/day, enters in the anaerobic biological treatment unit 84 tons/day.Emulsion water quality after oily water separation is COD7636mg/l, at breakdown of emulsion and solid-liquid separation unit calcium hydroxide consumption is 500mg/l, 10 minutes stirring reaction time, by the time during normal temperature, add PAM2mg/l, 10 minutes stirring reaction time, through precipitating 1 hour, supernatant C OD reduces to 2651mg/l, and clear liquid enters pH adjustment unit 6, utilizes hydrochloric acid that pH is adjusted into 6-9, supernatant liquor enters in the activated sludge absorption processing unit 7, mix with the active sludge of coming in, adopted aeration agitation 10 minutes, precipitate that supernatant C OD reduces to 1382mg/l after 1 hour, supernatant liquor enters in the anaerobic biological treatment unit 8, mix with the sanitary sewage in entering anaerobic biological treatment unit 8, hydraulic detention time is 10 hours, and supernatant C OD will be 327mg/l, supernatant liquor enters aerobe processing unit 9, hydraulic detention time 6 hours, COD will be 185mg/l, reach the emission request of three grades of emission standards of GB8978-1996 " integrated wastewater discharge standard ".

Embodiment 8

Wuxi City mechanical fitting manufacturing enterprise workshop produces emulsifying liquid waste water in process of production, this emulsifying liquid waste water COD15780mg/l, pH6.7, mineral oil content 1200mg/l, the water yield is 0.8 ton/day, for handling emulsifying liquid waste water, other utilizes 8.0 tons/day in this enterprise's daily life sewage, sanitary sewage water-quality COD 326mg/l, pH6.9, wherein sanitary sewage enters in the aerobic biochemical process sanitary sewage disposal unit 2 6.4 tons/day, enters in the anaerobic biological treatment unit 8 1.6 tons/day.Emulsion water quality after oily water separation is COD7636mg/l, at breakdown of emulsion and solid-liquid separation unit calcium hydroxide consumption is 500mg/l, 10 minutes stirring reaction time, by the time during normal temperature, add PAM2mg/l, 10 minutes stirring reaction time, through precipitating 1 hour, supernatant C OD reduces to 2651mg/l, and clear liquid enters pH adjustment unit 6, utilizes hydrochloric acid that pH is adjusted into 6-9, supernatant liquor enters in the activated sludge absorption processing unit 7, mix with the active sludge of coming in, adopted aeration agitation 10 minutes, precipitate that supernatant C OD reduces to 1497mg/l after 1 hour, supernatant liquor enters in the anaerobic biological treatment unit 8, mix with the sanitary sewage in entering anaerobic biological treatment unit 8, hydraulic detention time is 10 hours, and supernatant C OD will be 346mg/l, supernatant liquor enters aerobe processing unit 9, hydraulic detention time 6 hours, COD will be 198mg/l, reach the emission request of three grades of emission standards of GB8978-1996 " integrated wastewater discharge standard ".

Claims (6)

1. emulsified liquid waste water treatment method, comprise sanitary sewage equalizing tank (1), aerobic biochemical process sanitary sewage disposal unit (2), emulsifying liquid waste water equalizing tank (3), oily water separation unit (4), breakdown of emulsion and solid-liquid separation unit (5), pH adjustment unit (6), activated sludge absorption processing unit (7), anaerobic biological treatment unit (8), aerobe processing unit (9), discharging pond (10), mud concentrates and dewatering unit (11), oil storage unit 12 assembled units such as (12), it is characterized in that: entire method organically combines sanitary sewage disposal and emulsifying liquid waste water processing, part sanitary sewage is handled separately, mainly carrying out active sludge when handling sanitary sewage cultivates, another part sanitary sewage adds emulsifying liquid waste water in the anaerobic biological treatment unit (7) that emulsifying liquid waste water is handled, emulsion breakdown of emulsion and solid-liquid separation link can be selected heat treated or non-heat treated for use, add milk of lime and polyacrylamide PAM combination then.

2. a kind of emulsified liquid waste water treatment method according to claim 1 is characterized in that: the sanitary sewage of sanitary sewage equalizing tank (1) gets 2 with the water yield ratio that enters the emulsifying liquid waste water of emulsifying liquid waste water equalizing tank (3): 1-10: 1.

3. a kind of emulsified liquid waste water treatment method according to claim 1 is characterized in that: the congenial amount of the calcium hydroxide in breakdown of emulsion and the solid-liquid separation unit (5) is got 100mg/l-2000mg/l by the sewage volume, the dosage 2mg/l-50mg/l of PAM.

4. a kind of emulsified liquid waste water treatment method according to claim 1 is characterized in that: the flooding quantity ratio of the emulsifying liquid waste water of the sanitary sewage flooding quantity of aerobic biochemical process sanitary sewage disposal unit (2) and activated sludge absorption processing unit (7) gets 1: 1-8: 1.

5. a kind of emulsified liquid waste water treatment method according to claim 1 is characterized in that: the flooding quantity ratio of the emulsifying liquid waste water of the sanitary sewage flooding quantity of anaerobic biological treatment unit (8) and anaerobic biological treatment unit (8) gets 1: 1-5: 1.

6. a kind of emulsified liquid waste water treatment method according to claim 1 is characterized in that: the emulsifying liquid waste water of breakdown of emulsion and solid-liquid separation unit (5) can be taked the mode of first heat treated, also can not adopt type of heating.

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