活性炭海绵动态膜生物反应器用于污水处理提标改造中试研究

Application of Activated Carbon Sponge-Dynamic Membrane Bioreactor in Transformation of Wastewater Treatment

自行设计研发了以活性炭海绵作为膜基材的动态膜生物反应器,为污水处理的提标排放及资源化利用提供了科学依据及实际参考价值。详细考察了该反应器对污染物的去除效果和运行特性,通过和现有污水处理厂处理效果比较,探索活性炭海绵基材动态膜生物反应器用于城市污水提标改造的可行性。结果表明,在水力停留时间8h、污泥浓度8 000mg/L的条件下,活性炭海绵动态膜生物反应器出水COD、NH3-N、TN和TP浓度分别≤35.0mg/L、≤1.4mg/L、≤10.2mg/L和≤0.3mg/L,出水达到《城镇污水处理厂污染物排放标准》GB18918 2002一级A标准。活性炭的吸附性能和海绵的空间结构特征协同作用强化了系统对污染物的去除效果,活性炭海绵动态膜生物反应器可完全取代现有污水厂深度处理工艺应用于提标改造。曝气反冲洗可有效减缓出水通量下降,使系统出水通量稳定在30L/(m2·h)左右。

Dynamic membrane bioreactor （DMBR） based on activated carbon sponge materials was studied and developed independently. The pollutant removal efficiency and operational characteristics were investigated in detail, and the feasibility of DMBR application in transformation of real wastewater treatment plant （WWTP） was discussed by comparing the effluents. Results showed that the concentrations of COD, NH3-N, TN and TP in effluents were below 35.0 rag/L, 1.4 rag/L, 10.2 mg/L and 0.3 rag/L, respectively, with the HRT of 8 h and MLSS of 8 000 mg/L. The ultimate effluent was qualified to standard A of ＂Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant＂ （GB 18918-2002）. Adsorption of activated carbon and the spatial structure of sponge synergistically strengthen the pollutant removal. DMBR can be used in upgrading and transformation of WWTP by replacing the existing advanced treatment process. The flux of the DMBR was recovered by intensified aeration backwashing and maintained steadily at the level of 30 L/（m2 h）.