Examination And Research About Anaerobic Digestion Effect Factor Of Sulfate Antibiotic Pharmacentical Wastewater

Currently water pollution is extremely serious in China. High concentration sulfate Wastewater, one of the sewage constituents, can lead to the water body lower pH value, acid soil, thus bringing damage to surrounding ecologic environment. Consequently it has long before been a hot topic among environmental engineers to search for an effective sulfate Wastewater disposal technique.Antibiotics, the most widely clinically applied medicine, brings along typical sulfate high concentration organic Wastewater during the course of production. This Wastewater is notorious for its high concentration of COD, high degree of chroma and gestation, high sulfate concentration, and being not biodegradable.High concentration organic Wastewater is suitable for anaerobic biological treatment. However, once the Wastewater contains high concentration sulfate, the sulfate will inhibit anaerobic biological treatment of Wastewater. Yet H₂S, deoxidized by Sulfate Reducing Bacteria (SRB) from abundant sulfate in the Wastewater during anaerobic biological treatment, will inhibit and/or poison Methane Producing Bacteria (MPB) , which obstructs anaerobic biological treatment.The present study traced and monitored the antibiotic Wastewater from Sichuan Pharmacy (Pengzhou) Co. Ltd. The researcher carefully selected and finely tuned some crucial factors in an Up-flow Anaerobic Sludge Bed (UASB), i.e. pretreatment, pH value, temperature, COD/ SO₄^2- ratio, SO₄^2- concentration, sulfate and SRB and MPB's initial quantity, and obtained the variation rules related with sulfate reduction efficiency from the Wastewater on the spot, in search for an optimal conditions and parameters of this Wastewater. After UASB-SBR pretreatment while controlling the temperature at (35±1)℃, pH value about 7.2, COD/SO₄² ratio above 5, COD concentration between 6000-8000 mg/L and infall sulfate concentration lower than 1800mg/L, COD concentration arrived at less than 300mg/L at sewage plant exit, thus reached the second class of ((Comprehensive Sewage Discharge Standard)). Finally this paper emphasizes discussion on anaerobic digestion dynamics, based on which a sulfate anaerobic dynamics model is established, which is applied in explanation of some problems that we encountered and may encounter in the process of practical sewage treatment.