Pharmaceutical factory sewage treatment methodTechnical Field
The invention relates to the field of sewage treatment discharged by pharmaceutical factories, in particular to a sewage treatment method for pharmaceutical factories.
Background
The pharmacy is mainly divided into chemical synthesis and biological synthesis, the chemical synthesis is more, the pharmacy wastewater is rapidly increased along with the increase of the pharmacy scale, the pharmacy wastewater has complex components, more byproducts and complex components, and the COD concentration range of the chemical synthesis pharmacy enterprise is 423 and 32140mg/L and most enterprises are below 15000mg/L according to the display of related detection statistical data in China; the BOD concentration range is 300-800mg/L, and most enterprises are below 1000 mg/L; the concentration range of the SS is 80-2318mg/L, and most enterprises are below 500 mg/L; the concentration range of NH3-N is 4.8-1764 mg/L. However, the waste water produced by pharmaceutical factories in many places is discharged randomly without treatment, which causes damage to the surrounding environment and also affects the health of the surrounding residents.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a pharmaceutical factory sewage treatment method, which can be used for pretreating pharmaceutical factory wastewater and avoiding the pollution of the drugs with special components in the pharmaceutical factory to the surrounding environment.
The technical scheme adopted by the invention is that the pharmaceutical factory sewage treatment method is implemented according to the following steps:
step 1, introducing the sewage into a primary filtering tank for primary filtering, then introducing the sewage into a dust sand tank, adding a flocculating agent into a sand settling tank, wherein the mass-to-volume ratio of the flocculating agent to the sewage is 120-180 g: 1L, a dust and sand tank is provided with a variable speed stirrer, stirring is carried out for 5-15min, then stirring is carried out for 30-40min at the rotating speed of 150-;
introducing the sewage in the aeration tank into a photoreactor after the step 2 and the step 1H, and adding H with the mass concentration of 20% into the supernatant2O2Irradiating the solution with ultraviolet lamp, stirring, and standing for 20-30 min; na was added in a molar concentration of 0.1mM2SO3Until no bubble is generated in the sewage;
step 3, analyzing the treatment result of the effluent obtained in the step 2, and then sending the effluent into a contact disinfection tank and ClO2And (4) performing reaction disinfection, and finally discharging the effluent of the contact disinfection tank to a common sewage treatment tank.
The invention is also characterized in that:
the flocculant is an organic flocculant.
The organic flocculant is one or a mixture of polyacrylamide and poly dimethyl diallyl ammonium chloride.
The photoreactor is mainly made of quartz glass materials, a quartz pipe sleeve is vertically arranged in the middle of the photoreactor, an ultraviolet lamp is arranged in the quartz pipe, and the ultraviolet light is emitted by the ultraviolet lamp.
The ultraviolet lamp is a 25W mercury lamp.
The invention has the beneficial effects that:
the invention relates to a pharmaceutical factory sewage treatment method, which can carry out oxidative decomposition on drug impurities in pharmaceutical factory wastewater, carry out pretreatment on the drug wastewater and prevent environmental pollution.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The invention relates to a pharmaceutical factory sewage treatment method, which is implemented according to the following steps:
step 1, introducing the sewage into a primary filtering tank for primary filtering, then introducing the sewage into a dust sand tank, adding a flocculating agent into a sand settling tank, wherein the mass-to-volume ratio of the flocculating agent to the sewage is 120-180 g: 1L, a dust and sand tank is provided with a variable speed stirrer, stirring is carried out for 5-15min, then stirring is carried out for 30-40min at the rotating speed of 150-;
introducing the sewage in the aeration tank into a photoreactor after the step 2 and the step 1H, and adding H with the mass concentration of 20% into the supernatant2O2Irradiating the solution with ultraviolet lamp, stirring, and standing for 20-30 min; na was added in a molar concentration of 0.1mM2SO3Until no bubble is generated in the sewage;
step 3, analyzing the treatment result of the effluent obtained in the step 2, and then sending the effluent into a contact disinfection tank and ClO2And (4) performing reaction disinfection, and finally discharging the effluent of the contact disinfection tank to a common sewage treatment tank.
The flocculant is an organic flocculant.
The organic flocculant is one or a mixture of polyacrylamide and poly dimethyl diallyl ammonium chloride.
The photoreactor is mainly made of quartz glass materials, a quartz pipe sleeve is vertically arranged in the middle of the photoreactor, an ultraviolet lamp is arranged in the quartz pipe, and the ultraviolet light is emitted by the ultraviolet lamp.
The ultraviolet lamp is a 25W mercury lamp.
Example 1
A pharmaceutical factory sewage treatment method is implemented according to the following steps: introducing sewage into a primary filter tank for primary filtration, then introducing the sewage into a dust sand tank, adding polyacrylamide and poly dimethyl diallyl ammonium chloride into a sand settling tank, wherein the mass-to-volume ratio of the polyacrylamide to the sewage is 120 g: 1L, stirring for 5min by using a variable speed stirrer in a dust and sand tank, stirring for 30min at the rotating speed of 150r/min for flocculation, then introducing the sewage into an aeration tank, and introducing oxygen into the aeration tank;after 1H, introducing the sewage in the aeration tank into a photoreactor, and adding H with the mass concentration of 20% into the supernatant2O2Irradiating the solution with 25W mercury lamp, stirring, and standing for 20 min; na was added in a molar concentration of 0.1mM2SO3Until no bubble is generated in the sewage; analyzing the treatment result of the effluent, and then sending the effluent into a contact disinfection tank and ClO2And (4) performing reaction disinfection, and finally discharging the effluent of the contact disinfection tank to a common sewage treatment tank.
The photoreactor is mainly made of quartz glass materials, a quartz pipe sleeve is vertically arranged in the middle of the photoreactor, an ultraviolet lamp is arranged in the quartz pipe, and the ultraviolet light is emitted by the ultraviolet lamp.
Example 2
A pharmaceutical factory sewage treatment method is implemented according to the following steps: introducing sewage into a primary filter tank for primary filtration, then introducing the sewage into a dust sand tank, adding polyacrylamide and poly dimethyl diallyl ammonium chloride into a sand settling tank, wherein the mass-to-volume ratio of the polyacrylamide to the sewage is 150 g: 1L, stirring for 10min by using a variable speed stirrer in a dust and sand tank, stirring for 35min at the rotating speed of 200r/min for flocculation, then introducing the sewage into an aeration tank, and introducing oxygen into the aeration tank; after 1H, introducing the sewage in the aeration tank into a photoreactor, and adding H with the mass concentration of 20% into the supernatant2O2Irradiating the solution with 25W mercury lamp and stirring for 25 min; na was added in a molar concentration of 0.1mM2SO3Until no bubble is generated in the sewage; analyzing the treatment result of the effluent, and then sending the effluent into a contact disinfection tank and ClO2And (4) performing reaction disinfection, and finally discharging the effluent of the contact disinfection tank to a common sewage treatment tank.
The photoreactor is mainly made of quartz glass materials, a quartz pipe sleeve is vertically arranged in the middle of the photoreactor, an ultraviolet lamp is arranged in the quartz pipe, and the ultraviolet light is emitted by the ultraviolet lamp.
Example 3
A pharmaceutical factory sewage treatment method is implemented according to the following steps: introducing the sewage into a primary filter tank for primary filtration, then introducing the sewage into a dust sand tank, adding polyacrylamide, poly dimethyl diallyl ammonium chloride and the sewage into the sand settling tankThe mass-to-volume ratio of (A) is 180 g: 1L, stirring for 15min by using a variable speed stirrer in a dust and sand tank, stirring for 40min at the rotating speed of 250r/min for flocculation, then introducing the sewage into an aeration tank, and introducing oxygen into the aeration tank; after 1H, introducing the sewage in the aeration tank into a photoreactor, and adding H with the mass concentration of 20% into the supernatant2O2Irradiating the solution with 25W mercury lamp and stirring for 30 min; na was added in a molar concentration of 0.1mM2SO3Until no bubble is generated in the sewage; analyzing the treatment result of the effluent, and then sending the effluent into a contact disinfection tank and ClO2And (4) performing reaction disinfection, and finally discharging the effluent of the contact disinfection tank to a common sewage treatment tank.
The photoreactor is mainly made of quartz glass materials, a quartz pipe sleeve is vertically arranged in the middle of the photoreactor, an ultraviolet lamp is arranged in the quartz pipe, and the ultraviolet light is emitted by the ultraviolet lamp.
Through the mode, the pharmaceutical wastewater treatment method can be used for carrying out oxidative decomposition on pharmaceutical impurities in pharmaceutical wastewater, pretreating the pharmaceutical wastewater and preventing environmental pollution.