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In aerobic activated sludge wastewater treatment systems, microbial activity is to determine the wastewater treatment efficiency is the key factor. In this paper, Fuxin City Qingyuan sewage treatment plant sludge as a biochemical reaction cell inoculation sludge culture method using intermittent drowning , and ultimately develop a stable with good aerobic biological degradation activity of activated sludge . Experimental studies using sequencing batch of copper , zinc, nickel ion concentration at different conditions, the apparent yield of activated sludge , bio- degradable adsorption capacity , sludge flocculation performance and oxygen consumption rate and other aspects, and the two kinds of metal ions was determined in a case of coexistence , in its different dosing concentration , the interaction between metal ions . Experimental results show that : Cu2, Zn2, Ni2 the concentration of 10mg / L, 5mg / L, 1 Omg / L or less , Cu2 and Zn2, Cu2 and Ni2, Zn2 and Ni2 coexistence of the total concentration of 5mg / L, 5mg / L, 10mg / L or less, the apparent yield of sludge is not large , the system can be stable operation. Nickel ions and zinc ions in the mixture is relatively independent of the performance ; Cu2, Zn2, Ni2 concentrations were 5mg / L, 10mg / L, 5mg / L or less , Cu2 and Zn2, Cu2 , and Ni2, Zn2 and Ni2 coexistence in case of the total concentration of 5mg / L, 3mg / L, 3mg / L or less, no effect of the removal of CODCr , MLSS can increase stability , than this basis , the system can not run normally ; Zn2, Ni2 than 1mg / L when respiration inhibition of nearly 100% . Cu2, Ni2 case of coexistence of the respiration of microorganisms have a synergistic inhibitory effect ; Zn2, Ni2 case of coexistence of inhibition of microbial activity than a single nickel ions present when milder .
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