摘要
在人工湿地模型中,研究了人为增加湿地植物根际微生物对生活污水中COD的降解效果:将2株从湿地分离的根际微生物扩增培养(分别用于模型1与模型2),与一定比例的生活污水混合后注入到湿地模型中,在停留12,24,36,48 h时分别测定污水中COD的去除率。结果表明,加菌模型对COD的去除率显著高于空白模型(P<0.05),且随着时间的延长,二者的差异性越大,至48 h时,空白模型和2个加菌模型(模型1和模型2)对自然污水COD的去除率分别为50.6%,73.0%,75.3%,对灭菌污水COD的去除率分别为52.2%,76.3%,80.1%。说明向人工湿地中添加植物根际微生物将大大提高湿地对生活污水中COD的去除率,具有进一步开发的价值。
The experiment studies the effects of artificial adding of rhizosphere microorganism on the degradation of COD in sanitary wastewater by wetland models. Two rhaizesphere bacteria isolated from the constructed wetland are mixed with a certain proportion of waste water and injected into the wetland model. The degradation of COD is examined at 12 h, 24 h, 36 h, 48 h respectivelyr The results indicates that the COD degradation ratio of the bacteria models is significantly higher than that of the controlled model （ P 〈 0.05）, and the difference is even greater along with the time extension. The 48 h COD degradation ratio for natural sanitary wastewater in controlled model and the two bacteria models （model 1 and model 2） is 50.6%, 73.0% and 75.3% respectively and for sterilized sanitary wastewater, the 48 h COD degradation ratio is 52.2 %, 76.3 % and 80.1% respectively. The result implies that artificial adding of rhizesphere microorganism may significantly improve the COD degradation ratio of sanitary wastewater in wetland, and further work should be carried to exoloit the technology.
出处
《工业安全与环保》
北大核心
2009年第8期9-10,共2页
Industrial Safety and Environmental Protection
基金
湖北省科技攻关计划(2006AA305A0402)
武汉市科技攻关计划(200860423206)
广州市政府采购科技项目(GPC-[2007]303)资助
关键词
COD
根际微生物
湿地模型
COD rhizosphere microorganism wetland model
