Asynchronous Cultivation and Domestication of Aerobic Activated Sludge to Treat the Pickle Wastewater

The domestication of activated sludge which was from domestic sewage treatment plant was studied, the effects of the pre acclimated sludge and acclimated sludge on the pickle wastewater were investigated, and the effects of pH, HRT (hydraulic retention time), aeration intensity, dissolved oxygen DO and other factors on the removal efficiency of COD were studied during the continuous operation of acclimated sludge. Experimental results show, the domesticated sludge which has been domesticated for 28 days has a stronger ability to adapt and deal with the sludge before acclimation. Under the condition of continuous water inlet and outlet, pH = 7, aeration intensity of 1000ml / (min. L), temperature of 17 degrees C, HRT = 4h, the removal rates of COD, NH3-N and TP were 93%, 36% and above, respectively, the effluent concentrations were 88, 1.27 and 1.17mg/L respectively, and the removal load of COD was about 1.38kgCOD/(m(3).d).