活性炭污泥回流处理季节性微污染东江水

Enhanced treatment of Dongjiang water of seasonal light pollution with activated carbon sludge recirculation

利用炭砂滤池中试系统,将粉末活性炭和聚合氯化铝混合污泥回流至炭砂滤池的絮凝池,考察无炭泥回流与炭泥回流比为1%、3%、5%时对浊度、有机物和氨氮的去除效果,得出最优回流比。结果表明:系统稳定运行前提下,炭泥回流工艺会明显提升对浊度、有机物和氨氮的去除效果;在一定范围内(≤3%),去除率随着回流比的增加而增大;回流比为5%时,受微絮体以及过多回流污泥影响,沉淀池和滤池负担过大,影响各指标的去除效果。

Using the experimental carbon-sand filter system to make the PAC and PACL mixed sludge circumfluence to flocculation pool,the removal effect of organic matter and ammonia nitrogen was investigated,the optimal reflux ratio are obtained.The results show that when the system is in steady running,coal mud reflow process on turbidity,organic matters and ammonia nitrogen removal efficiency are better than carbon mud reflux process;within a certain range（3%） or less,the removal rate increases with the increase of reflux ratio increases;when the reflux ratio is 5%,because of the micro-flocs and excess backflow sludge,the effect of sedimentation tank and filter burden is too large,affecting the removal efficiency of each index.