仿生态复合酶制剂用于剩余污泥减量的试验研究

Study on Complex Eco-enzyme Preparations for Sludge Reduction

采用仿生态复合酶制剂在某污水处理厂进行剩余污泥减量试验。设A、B、C三组相同装置，A不投加酶制剂，而B、C组分别投加约为处理水量0．01％和0．02％的酶制剂，均采用常规活性污泥法且运行操作相同，比较三组试验装置的污泥减量效果。结果表明：相比于A组，B、C组的剩余污泥减量效果分别达到了38．4％、56．7％，并且对出水水质没有消极影响，反而提高了对TN、TP的去除效果。A、B、C组出水COD均值分别为37、42、46mg／L。氨氮均值分别为1．76、1．36、1．52mg／L，TN均值分别为17．9、13．5、14．3mg／L，TP均值分别为0．54、0．45、0．37mg／L。通过估算，投加0．01％一0．02％酶制剂进行污泥减量，其处置成本仍然高于传统的填埋，但污泥焚烧处置的推广，将为酶制剂污泥减量技术提供广阔的市场应用前景。

The excess sludge reduction tests were conducted by using complex eco-enzyme preparations in a wastewater treatment plant. Three sets of experimental devices named A, B and C, which used conventional activated sludge process under the same operation conditions, were employed to com- pare the sludge reduction effect. The dosages of the enzyme preparations added to A, B and C were 0, 0.01% and 0.02% of the treated wastewater, respectively. Compared to A, B and C achieved sludge reduction of 38.4% and 56.7% without deteriorating the effluent quality, and improved the removal effi- ciency of TN and TP. The effluent qualities of A, B and C were as follows ： average COD of 37 mg/L, 42 mg/L and 46 mg/L; average ammonia nitrogen of 1.76 mg/L, 1.36 mg/L and 1.52 mg/L; average TN of 17.9 mg/L, 13.5 mg/L and 14.3 mg/L; and average TP of 0.54 mg/L, 0.45 mg/L and 0.37 mg/ L. Although the cost of sludge reduction using enzyme preparations of 0.01% to 0.02% was higher than that of landfill, extension of sludge incineration would provide wide application prospects for sludge reduction using enzyme preparations.