ABR-aerobic Treatment Of Garlic-processing Wastewater

In recent years,because of the expanding of garlic processing enterprises,it produces a lot of wastewater,however the garlic wastwater has characteristics of antiseptic and detoxification, and currently there is few research for this kind of wastewater.This paper studied the effect of ABR-aerobic process on the degradation of garlic wasterwater,and researched the influence of continuerous added coagulation treatment on the removal efficiency of COD in the wasterwater.This article firstly studied the ABR reactor separately treated garlic processing wastewater.Characterized the self-made ABR reactor with HRT,indicating adding the packings will increase the reactor residence,and improve the COD removal rate. Successfully launched the ABR reactor, for the influent of COD 3000mg/L,removal rate maintained about 75%.Meanwhile,the effects of temperature and influent organic loading on the removal rate were studied,the optimal operation process of the ABR reactor was determined which the water flow rate of 1L/h and water organic load of 5000mg/L under the temperature of 35℃,the removal rate of COD stabilized at 80%.Studied the wastewater removal rate of ABR-aerobic process,wastewater removal rate of ABR reactor stabilized at about 80%,the removal rate of aerobic reactor maintained at 85% to 90%,and the total ABR-aerobic process removal rate remained at about 97%,the effluent attained the state's second-class standard for the environmental quality of surface water. Determined the optimum influent COD is 5500mg/L,while the optimal temperature of ABR-aerobic combined process can reach 45℃.Compared with the same organic load garlic water directly entered the anaerobic reactor,the COD removal of wastewater entered after treatment by ABR reactor enhanced 8%,it can be seen that the wastewater's biochemical ability can be increased by ABR.As the same time,this experiments also investigated the coagulation process for the effect of COD removal.Comparing the COD removal rate under different dosage and finally determined coagulant dosing quantity of this experiment is 60mg/L,and after coagulation, COD can be reduced to below 60mg/L,the effluent kept clear and attained the state's first-class standard for the environmental quality of surface water.