D-A^2O技术处理生活污水的示范工程研究

Demonstration Project of Treating Domestic Sewage by D-A^2O Technology

针对D-A^2O污水处理示范工程,确定了该工程基本运行条件及参数,并以间歇运行的方式作为应对水量及碳源极度缺乏的调控策略。在确定的运行条件和参数下,以间歇运行方式为调控策略可获得高效、稳定的污染物去除效果。当水温为24℃时,系统对COD、TN、NH_3-N、TP的去除率分别为77.92%、90.55%、91.93%、62.23%;低温时系统对COD、TN、NH_3-N、TP的去除率分别为75.36%、80.12%、82.04%、51.32%。不同温度下示范工程出水COD、TN、NH_3-N、TP浓度分别为(19.12~23.07)、(0.65~1.02)、(0.34~0.68)、(0.21~0.36)mg/L,出水水质均优于一级A标准。在应对碳源极度缺乏的调控策略下,D-A^2O示范工程中污泥可保持较高活性。根据D-A^2O技术的发展沿革,分析了示范工程研究成果的适用性,据此阐明其推广应用的可能性。

The basic operation conditions and parameters of the D-A20 sewage treatment demon- stration project were determined, and the intermittent operation mode was used as a regulation strategy to cope with the insufficient sewage quantity and the extreme lack of carbon source. Under the determined operation conditions and parameters, the intermittent operation mode as the regulation strategy could obtain a more efficient and stable pollutant removal efficiency. When sewage temperature was 24℃, the removal rates of COD, TN, NH3 - N and TP were 77.92%, 90. 55%, 91.93% and 62.23%, respectively. The removal rates of COD, TN, NH3 - N and TP at low temperature were 75.36%, 80. 12%, 82.04% and 51.32%, respectively. The effluent concentrations of COD, TN, NH3 -N and TP at different temperatures were 19.12 to 23.07 rag/L, 0.65 to 1.02 mg/L, 0.34 to 0.68 mg/L and 0.21 to 0.36mg/L, respectively. The effluent quality was superior to the level A criteria specified in the national discharge standards. Under the regulation strategy for extreme lack of carbon source, the activated sludge in the D-A2O demonstration project could maintain a high activity. According to the development and evolution of D-A2O technology, the applicability of the research results of the demonstration project was analyzed, and the possibility of its application was expounded.