Department of Environmental Engineering, Faculty of Engineering, Firat University, 23119-Elazig, Turkey.
Water Sci Technol. 2009;60(12):3121-7. doi: 10.2166/wst.2009.748.
Young leachate was a high strength wastewater with regard to carbon and nitrogen matter, and up to now many researchers have focused on a number of treatment methods to treat the leachate. By using various treatment processes, joint treatment of leachate with domestic wastewater, resulted from same community, is one of the most significant methods because domestic wastewater has either larger mass or lower strength than leachate. In this study, a submerged membrane bioreactor (sMBR) was used for treatment of blending wastewater, including differential mixture ratios of domestic wastewater and leachate. In raw leachate, BOD(5)/COD was between 0.40 and 0.67 and total phosphorus was between 17 and 24 mg/l. After the leachate was blended with domestic wastewater in the ratios of 1/5-1/20, the influent COD decreased from 8,500-14,200 mg/l to 750-2,400 mg/l as ammonium decreased from 1,100-2,150 mg/l to 30-180 mg/l. The sMBR, which was aerated intermittently, accomplished both COD oxidation and nutrient removal at optimal conditions without adding the external phosphorus source, providing < 15 mg COD/l, <1.3 mg NH(4) (+)-N/l, and <2.0 mg P/l on average at solid retention times (SRT) higher than 10 days. Consequently, the results showed the mixture of leachate and domestic wastewater could be an acceptable alternative by means of membrane bioreactor technology.
年轻的渗滤液是一种高碳氮强度的废水，到目前为止，许多研究人员已经专注于许多处理方法来处理渗滤液。通过使用各种处理工艺，对来自同一社区的渗滤液和生活污水进行联合处理是最有效的方法之一，因为生活污水的质量或强度比渗滤液要大或小。在这项研究中，采用浸没式膜生物反应器（sMBR）处理混合废水，包括不同比例的生活污水和渗滤液混合。在原渗滤液中，BOD(5)/COD 在 0.40 到 0.67 之间，总磷在 17 到 24mg/l 之间。将渗滤液与生活污水以 1/5-1/20 的比例混合后，进水 COD 从 8500-14200mg/l 降至 750-2400mg/l，同时氨氮从 1100-2150mg/l 降至 30-180mg/l。在最佳条件下，采用间歇曝气的 sMBR 同时完成 COD 氧化和营养物去除，无需添加外部磷源，在固体停留时间（SRT）高于 10 天时，COD 平均<15mg/l，NH(4) (+)-N<1.3mg/l，P<2.0mg/l。因此，结果表明，渗滤液和生活污水的混合物可以通过膜生物反应器技术作为一种可接受的替代方法。
