Chemical wastewater treatment is multi-industry and multi-variety. Chemical wastewater includes mine wastewater, petrochemical industrial wastewater, acid-base industrial wastewater, chemical fertilizer industrial wastewater, plastic industrial wastewater, dye industrial wastewater, washing industrial wastewater, etc. Chemical wastewater is wastewater discharged during the production of chemical products, including process wastewater, cooling water, waste washing water, equipment and site washing water, etc. Different industries, different enterprises, different raw materials, different production methods and different types of equipment all have a great impact on the amount of wastewater produced and the types and concentrations of pollutants. Chemical wastewater treatment must first understand the water quality of the raw water, and consider the use of various combinations.
The main source of chemical wastewater
(1) The waste water formed by the loss of some materials and washed by rainwater or water during the process of production, packaging, transportation and stacking of raw materials and products in chemical production;
(2) waste produced by incomplete chemical reaction;
(3) Waste water generated by side reactions in chemical reactions;
(4) cooling water;
(5) Wastewater discharged from some specific production processes.
Process one:
Pretreatment + biochemical treatment + advanced treatment.
Pretreatment is mainly sedimentation (if necessary, sedimentation needs to be added), air flotation, oil separation, micro-electrolysis and other treatment processes to remove oil, reduce SS and improve the biodegradability of sewage. Biochemistry includes anaerobic and aerobic. Anaerobic process has Hydrolytic acidification, UASB, ABR, IC, etc. Aerobic processes include activated sludge, biological contact oxidation, SBR, etc. When the effluent water quality is high, further advanced treatment is required. The advanced sewage treatment processes include fiber filter, membrane method, etc.
Processing technology two:
The waste water discharged from the workshop first passes through the grid to remove large suspended matter, then enters the regulating tank to adjust the water quality and quantity, and then is pumped into the primary reaction tank by the lift pump to oxidize the elemental phosphorus into phosphate, then enters the primary coagulation tank, and puts it into the primary reaction tank. Add lime to form calcium phosphate precipitate, then enter the primary flocculation tank to form large particle flocs, and then enter the primary sedimentation tank for solid-liquid separation and removal, and then enter the secondary reaction, coagulation and flocculation reaction for further reaction, and then Enter the secondary sedimentation tank to remove phosphorus-containing substances in the water. The supernatant enters the intermediate tank, and then is pumped into the multimedia filter by the lift pump for filtration, then enters the discharge tank, and then is metered and discharged through the metering discharge tank. The sludge after pressure filtration is regularly outsourced for treatment.
Chemical wastewater treatment is difficult, the water quality is complex, and there are many types of pollutants with high content. There are many biodegradable substances, harmful and toxic pollutants are common, and their biodegradability is poor. Therefore, the requirements for technology and process design are high, and it is necessary to design the process according to the water quality conditions. Henan Huatai environmental company supply chemical sewage treatment solution, any need please email to info01@cnoilmachine.com