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模块化生物滤池-人工湿地对农村生活污水的处理
Treatment of rural domestic wastewater by modular biological filter and constructed wetland
【摘要】 以常用的农村污水处理工艺“厌氧池+好氧生物滤池”为研究对象,对好氧生物滤池进行模块化设计,并与人工湿地相组合,将滤池出水接入潜流人工湿地。通过运行参数的调控,考察了工艺对COD、NH4+-N、TN、TP的去除效果,使其成为用于处理农村生活污水的新型组合处理装置。结果表明:在好氧生物滤池回流比为300%,布水间歇为2 min:8 min时,组合工艺的出水NH4+-N、TN、COD和TP均满足《农村生活污水处理设施水污染物排放标准》(DB32/3462-2020)一级A标准中水质要求。对滤池不同高度上的微生物组成进行了分析,结果表明,池内微生物种类丰富,并以Proteobacteria、Firmicutes菌门为主。根据属水平上的微生物分析以及冗余性分析,对氮的去除主要发生在滤池的中下部。
【Abstract】 The commonly used rural sewage treatment process of Anaerobic Tank+Aerobic Biological Filter was taken as the research object, the aerobic biological filter was designed modularly and combined with constructed wetlands. The filter effluent flowed into the subsurface flow constructed wetland. The removal effect of CODCr, NH4+-N, TN and TP was investigated through the operation parameters regulation, which made it a new combined treatment device for rural domestic sewage. The experimental results show that when the reflux ratio of aerobic biofilter was 300% and the interval of water distribution was 2 min:8 min, NH4+-N, TN,COD and TP in the effluent of the combined process met the water quality requirements in the first-class A standard of Discharge Standard of Water Pollutants for Rural Domestic Sewage Treatment Facilities(DB32/3462-2020).Microbial community analysis at different heights from the top of filter bed reveals a diverse microbial composition within the filter, which was primarily dominated by the Proteobacteria and Firmicutes phyla.Microbial analysis and redundancy analysis at the genus level suggests that nitrogen removal primarily occurred in middle and lower part of the filter bed.
【Key words】 rural domestic sewage; modular biofilter; biological nitrogen removal; microbial community;
- 【文献出处】 环境工程学报 ,Chinese Journal of Environmental Engineering , 编辑部邮箱 ,2024年03期
- 【分类号】X799.3
- 【下载频次】128