A^2/O工艺处理高氨氮城市污水调试运行

Debugging Operation of High Ammonia-nitrogen Containing Sewage Treatment by A^2/O Process

华北某城市污水厂实际进水NH_3-N值和SS值均高于设计值。运营以来,由于部分曝气设施老化,好氧池实际泥龄短,生存的硝化菌数量不能实现氨氮稳定达标的要求而导致实际出水水质不能稳定达标。通过提高好氧段实际水力停留时间、校核剩余污泥排放能力、改进生化池缺氧段等技术措施,提高好氧池硝化能力,使NH_3-N及主要水质指标达到城镇污水处理厂污染物排放标准(GB18918-2002)一级A标准。

he actual influent values of NH3-N and SS of a sewage plant in North China were higher than design values. Sinceoperation, because some aeration facilities age and the practical sludge age of aerobic pool was short, the number of survived nitrifying bacteria could not meet the requirement of ammonia nitrogen stabilization standards, so that the practical effluent quality could not met the standard steadily. By improving the actual residence timeofaerobicperiod, checking the residual sludge discharge capacity, improvingtechnicalmeasuresoffhebiochemicalpoolanoxicperiod, enhancing nitrification ability of aerobic pool, to make NH3-N and the main water quality indexes meet the in＇st level A discharge standard of pollutants for municipal wastewater treatment plant （GB 18918-2002）.