A/O生物滤池处理高盐废水低温启动与影响分析

针对海水的高盐浓度压舱水,采用阶段挂膜启动A/O生物滤池工艺处理。高盐环境下,考察了盐质量浓度为33 g/L左右时反应器的低温生物强化过程,不同运行条件(滤速、回流比、气水比)下反应器中有机物和氨氮的降解情况,探讨了滤池反冲洗对处理效果的影响。结果表明,滤池最佳回流比、气水比分别为3∶1,最经济滤速为1.5m/h。反应器的COD、NH3-N及TN出水水质可满足国家一级A出水标准。

Low temperature starting and infIuence anaIysis of A/O biochemicaI fiIter for the treatment of high-saIinity wastewater

Aiming at the ballast water with high chlorine ions in seawater,the staged membrane formation technology has been used for starting up the treatment process of A/O biological filter ,In an environment with high salinity ,the low temperature biological enhancement process of the reactor ,when the salt content is about 33 g/L ,and the degra-dation situations of organic substances and ammonia-nitrogen in the reactor,under different operation conditions (filtering speed,reflux ratio,and gas water ratio) are investigated,The influences of filter backwashing on the treat-ment effect are discussed. The results show that the best reflux ratio and gas water ratio are 3∶1,respectively,the most economical filter speed is 1.5 m/h. The effluent water quality of the reactor COD,NH3-N,and TN can meet the requirements for the national first level A effluent standard.