作　　者： ; ; ; ; ;

机构地区： 仲恺农业工程学院环境科学与工程学院环境科学与工程系

出　　处： 《安徽农业科学》 2009年第12期5794-5795,5807,共3页

摘　　要： [目的]研究了停留时间对植物-生物膜氧化沟净化污水的影响,为植物-生物膜氧化沟的应用提供理论依据。[方法]3套植物-生物膜氧化沟系统中,系统1采用4 h停留时间,系统2采用8 h停留时间,系统3采用12 h停留时间。[结果]试验表明,该植物-生物膜氧化沟系统出水COD、NH4+-N、SS等的浓度分别在60、25和30 mg/L以下,均达到国家城镇二级污水处理厂排放标准;各污染物的去除随着停留时间的延长而提高。[结论]在CODS、S的去除上,12 h HRT和8 h HRT之间差异不显著,但为了加强脱氮除磷,建议采用12h水力停留时间。 [Objective] The effect of the holding time of the sewage in the oxidation ditch of plant bio-film on its purification was studied for the provision of the theoretical basis of the application of the oxidation ditch. [Method] There were 3 sets of systems of oxidation ditch of plant bio-film and the system 1 was with holding time of 4 hours; the system 2, 8 hours and the system 3, 12 hours. [Results] The testing result showed that the concentration of COD, N1-14. -N and SS in the effluent from the system were less than 60, 25 and 30 mg/L, respectively, which met the demand of the National Standard of Sewage Discharge of Class-2 Treatment Plant at township. With the holding time-prolonging of the sewage the removal amount of pollutants was increased. [Conclusion] There was not significant difference in the removal amount of COD and SS between 12 hour HRT and 8 hour HU, but in order to strengthen the nitrogen and phosphorus removal, it was recommended to use 12 hour HRT.

关 键 词： 停留时间 植物 生物膜氧化沟 污水处理

领　　域： [环境科学与工程]