城市污水处理厂A^(2)/O工艺调试运行实例分析

An Case Analysis of A^(2)/O Process Debugging and Operation in Urban Sewage Treatment Plant

江苏某污水厂实际进水NH3-N值高于设计值。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、活性污泥的培养驯化、改进生化池缺氧段等技术措施,提高好氧池硝化能力,使NH3-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。因为污水处理厂工艺流程复杂就必须不断地进行调试分析,本文是以改污水处理厂为研究对象进行调试研究,并根据调试中遇到的问题提出解决措施和注意事项。

In Jiangsu,the actual influent NH3-N value of a sewage plant is higher than the design value during the operation.Due to the aging of some aeration facilities and the short actual mud age of the aerobic tank,the number of nitrifying bacteria in existence cannot meet the requirements of stable ammonia nitrogen,resulting in the fact that the actual effluent quality cannot meet the standard stably.In order to improve the nitrification capacity of the aerobic tank,make NH3-N and other main water quality indicators meet the discharge standard of pollutants from urban sewage treatment plants of Class A(GB18918-2002).Which has gotten by improving the actual hydraulic retention time of the aerobic section,the cultivation and domestication of activated sludge,and the improvement of the anoxic section of the biochemical tank.Because the process flow of the sewage treatment plant is complex,it must be continuously debugged and analyzed.This article takes the modification of the sewage treatment plant as the research object to carry out debugging research,and proposes solutions and precautions according to the problems encountered in the debugging.