利用两级交替回流/厌氧/局部供氧生物膜技术处理农业园区的分散污水,研究了有机物和氮的去除效果.结果表明,COD、BOD5、氨氮和总氮的平均去除率分别为64.9％、71.6％、64.4％、45.5％,出水平均质量浓度分别为54.7、15.3、9.2、17.2 mg/L,基本达到了《城镇污水处理厂污染物排放标准》(GB 18918-2002)一级B标准.该技术在冬季低温期和水质复杂期也能够稳定运行.%An anaerobic/local oxygen supply biofilm technology with two-stage alternate returns was utilized to treat decentralized wastewater from an agricultural garden.The removal efficiency of nitrogens and organics was studied.Results indicated that the average removal rate of COD,BOD5,ammonia nitrogen and total nitrogen were 64.9 ％,71.6 ％,64.4 ％ and 45.5％,respectively.The average effluent mass concentrations of COD,BOD5,ammonia nitrogen and total nitrogen were 54.7,15.3,9.2 and 17.2 mg/L,respectively,almost all meeting "Discharge standard of pollutants for municipal wastewater treatment plant" (GB 18918-2002) first level B standard.It was worth mentioning that the process could stably run during low temperature period and complicated period.
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