摘要
对从太湖打捞的蓝藻进行离心脱水后获得藻浆压滤液,其中含有大量藻类细胞液,N、P以及微囊藻毒素(MC LR)含量较高,如不经处理直接排放,必将引起二次污染。采用下向流曝气生物滤池(BAF)工艺处理藻浆压滤液,考察了对COD、氨氮、TN、TP、MC LR等污染物的去除效果。结果表明,当水力负荷为0.40m3/(m2·h)时,出水COD、氨氮、TN、TP、MC LR平均去除率分别为73.4%、91.6%、39.6%、13.2%和88.3%。出水COD、氨氮达到《城镇污水处理厂污染物排放标准(GB 18918-2002)》中的一级A标准,MC LR低于《生活饮用水卫生标准(GB 5749-2006)》的限值。对BAF系统中微生物种属进行分析,通过构建系统发育树确定其优势菌种分别为赖氨酸杆菌、气单胞菌、芽孢杆菌、不动杆菌、无色菌、梭状杆菌和假单胞菌,启动期投加的藻毒素降解菌T1在BAF系统中生长良好并形成优势菌种。
When the salvaged cyanobacteria was dehydrated by centrifugation, the algae pulp filtrate produced. And there were a large number of algae cell sap, nitrogen, phosphorus, and algae toxin. If it is discharged into water directly, it would cause secondary pollution. The downward-flow biological aerated filter was used to treat the algae pulp filtrate, and the removal effect of COD, NHd-N, TN, TP and MC- LR was investigated. The result showed that the average removal rate of COD, NHd-N, TN, TP and MC- LR were 73.4%, 91.6%, 39.6%, 13.2% and 88.3% respectively under the condition that the hydraulic loading was for 0.40 md/（m2 · h）. The COD and NHd-N meet standard A of the first class in ＂Discharge standard of pollutants for municipal wastewater treatment plant＂（GB18918--2002）, and the concentration of MC-LR is lower than the limit of ＂Standards for Drinking Water Quality＂ （OB 5749--2006）. The microbial species in biological aerated filter was analyzed. The dominant bacteria were Lysinibacillus, aeromonas, bacillus, acinetobacter, aehromobaeter, bacillus, fusiformis, and pseudomonas respectively determined by constructing phylogenetie tree. The cyanobacteria toxin degradation bacterium of T1 which was put in biological aerated filter in start-up grew well and form certain advantages.
出处
《土木建筑与环境工程》
CSCD
北大核心
2013年第5期55-61,77,共8页
Journal of Civil,Architectural & Environment Engineering
基金
国家水体污染控制与治理科技重大专项(2012ZX07301-001)
江苏省自然科学基金(BY2012100)
安徽省自主创新专项(12010402103)
关键词
藻浆压滤液
曝气生物滤池
生物降解
DNA提取
菌种鉴定
系统发育
algae pulp filtrate, biological aerated filter, biodegradation, DNA extraction, strain identification,phylogeny
