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为解决传统农村庭院式分散养殖仍普遍存在的排放的废水规模小、波动大、收集与处理困难,规模化养殖废水集中处理模式难以适用的问题,研究采用上流式污泥床(UBF)-复合生物滤池-人工湿地组合工艺进行处理。结果表明,在进水COD为542~1 448 mg/L,TN、NH3-N、TP的质量浓度分别为88.48~475.6、74.92~301.9、4.99~31.63mg/L条件下,组合工艺对COD、TN、NH3-N以及TP平均去除率分别可达到87.50%、71.79%、77.03%和91.17%。而当复合生物滤池水力负荷为0.42 m3/(m2·d),人工湿地水力停留时间为5 d,回流体积比1:1时各项指标处理效果最佳。可为农村分散型养殖废水处理提供模式与参考。
In order to solve the problems of small scale, large fluctuation, difficulty of collection and treatment, and difficulty of centralized treatment of large-scale farming wastewater in traditional rural courtyard-type decentralized farming, the use of upflow-type sludge bed (UBF) Biological filter - Constructed wetland process technology. The results showed that under the conditions of influent COD of 542-1 448 mg / L, TN, NH3-N and TP concentrations of 88.48 ~ 475.6, 74.92 ~ 301.9 and 4.99 ~ 31.63 mg / L, The average removal rates of TN, NH3-N and TP reached 87.50%, 71.79%, 77.03% and 91.17% respectively. However, when the hydraulic load of composite bio-filter was 0.42 m3 / (m2 · d), the hydraulic retention time of constructed wetland was 5 d, and the reflux volume ratio was 1: 1, the indexes were the best. It can provide a model and reference for the decentralized farming wastewater treatment in rural areas.