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In recent years , the garlic manufacturing industry to flourish , garlic processing enterprises have been expanding , and the resulting large number of processing wastewater , but garlic the wastewater has strong inhibitory effect , therefore , for the study of this type of wastewater few . The paper studies the ABR- aerobic combined process for the degradation of garlic water , and the effects of adding the subsequent coagulation treatment of COD removal . This paper studies the the ABR reactor separate processing garlic processing wastewater . The first hydraulic retention time of the indicators characterized homemade ABR reactor the increasing filler to extend the residence time of the reactor , to improve the COD removal rate . Successfully launched ABR reactor for COD 3000mg / L influent , the removal rate stabilized at around 75% . Also investigated the impact of temperature , and water organic load removal rate to determine the optimal operation of this experiment ABR reactor process , that is, at 35 ℃ , the influent flow rate of 1L / h, influent organic load to 5000mg / L, then the COD removal rate stabilized at about 80%. Aerobic combined technique of ABR- investigated under optimum conditions in ABR reactor for wastewater removal rate : ABR reactor for wastewater removal is always stable at around 80% , the removal efficiency of the aerobic reactor is always maintained at between 85 % and 90% , ABR- aerobic combined technique of total removal rate remain at about 97% , and water quality meet the national discharge standard . Another experiment to determine the optimum combination process influent COD concentration of 5500mg / L, the optimum temperature can reach 45 ° C , while re-entering the aerobic reactor after ABR treating wastewater processing than the same COD garlic water directly into the aerobic reactor COD removal increased 8% , the visible the ABR to improve the biodegradability of the wastewater . At the same time , the present study also investigated the subsequent add - coagulation treatment effluent COD removal . Compare different coagulant dosage for COD removal efficiency , determine the experimental coagulant dosage to 60mg / L, after coagulation treatment , the effluent COD can be reduced to less than 60mg / L and water clarification , good transparency, and meet the national emission standards .
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