摘要
采用无纺布为厌氧滤池NWAF的填料,研究不同填充率无纺布厌氧滤池35%NWAF,50%NWAF和65%NWAF在不同水力停留时间下处理分散式生活污水的效能。结果表明:不同填充率无纺布厌氧滤池NWAF分别在水力停留时间3d,2d和1d工况下运行,随着填充率增大,COD去除率升高,日产甲烷量增加,出水VFA降低。填料填充率及水力停留时间对TN和TP的去除率影响有限。考虑到分散式生活污水处理效能及其成本,NWAF优选50%填充率,与此同时,为了达到GB 18918-200排放标准,NWAF需与后续处理系统相结合。
The non-woven anaerobic filters(NWAFs) under different carrier filling ratios(35%, 50% and 65%, respectively) were used to evaluate the performance of decentralized domestic wastewater treatment at different hydraulic retention times. The results showed that the average COD removal efficiency and the daily CH4 production increased with an increase in carrier filling ratios at HRTs(3d, 2d and 1d, respectively). In addition, the effluent concentration of VFA decreased with an increase in carrier filling ratios. Meanwhile, carrier filling ratios had limited influence on the removal efficiency of TN and TP. Considering the performance and the costs of the NWAF, 50% carrier filling ratio was suitable for the NWAF in decentralized wastewater treatment. Additionally, in order to meet the "urban sewage treatment plant pollutant discharge standard"(GB 18918-2002), post-treatment of NWAF should be used.
引文
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