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首页> 外文会议>Asian Pacific Confederation of Chemical Engineering congress >Organic contamination and flocculation treatment of landfill leachate secondary effluent
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Organic contamination and flocculation treatment of landfill leachate secondary effluent

机译：垃圾渗滤液二级出水的有机污染及絮凝处理

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The most popular biological process in use today for the treatment of landfill leachate frequently does not conform to the National Industry Drainage Standard. Current post-treatment technology is limited by high operating costs, low treatment efficiency, or sensitive operating conditions. In this study, leachate secondary effluent was treated with a novel inorganic coagulant, poly-aluminum(III)-magnesium(II)-sulfate (PMAS), and its organic matter content was determined by gas chromatography coupled with mass spectrometry (GC-MS). We described the procedure used to prepare PMAS and the major properties of PMAS and the leachate secondary effluent. We determined the removal of color, chemical oxygen demand (COD), and biological oxygen demand (BOD5) and the solid separation of sludge. Organic contaminants in the secondary effluent before and after treatment were identified by GC-MS. The results demonstrate that removal of color,COD, and BOD5 by coagulation with PAMS can reach 85.6%, 62.6%, and 58.8%, respectively, which greatly reduces the extent of pollution and improves its appearance. PMAS performs coagulation/flocculation mainly by charge-neutralization and the flocculation sludge has good solid separation. More than 40 organic species were identified in the secondary effluent and some of them belong to the Black List of environmental preferred controlled pollutants considered by the USA and China Environmental Protection Agency. The alkyl, alkene, acyclic alcohol and acyclic acyl amine species are removed efficiently (～ 85%), and some are removed completely, while the acid, ester and ketone species are mostly removed (～ 65%) and species with a benzene ring, such as aromatic hydrocarbons, hydroxybenzenes, aromatic alcohols, and aromatic acyl amines, are partially removed (～ 50%).
机译：如今，用于处理垃圾渗滤液的最流行的生物工艺通常不符合国家工业排水标准。当前的后处理技术受到高运行成本，低处理效率或敏感的运行条件的限制。在这项研究中，用新型无机混凝剂聚铝（III）-硫酸镁（II）（PMAS）处理渗滤液的二次废水，并通过气相色谱-质谱联用（GC-MS）测定其有机物含量。 ）。我们描述了用于制备PMAS的程序以及PMAS的主要特性以及沥滤液的二次流出物。我们确定了颜色，化学需氧量（COD）和生物需氧量（BOD5）的去除以及污泥的固体分离。通过GC-MS鉴定了处理前后二次废水中的有机污染物。结果表明，通过PAMS混凝去除颜色，COD和BOD5分别达到85.6％，62.6％和58.8％，这大大减少了污染程度并改善了外观。 PMAS主要通过电荷中和进行凝结/絮凝，絮凝污泥具有良好的固体分离能力。在次要废水中发现了40多种有机物种，其中一些属于美国和中国环境保护总署考虑的环境优先受控污染物黑名单。有效去除烷基，烯烃，无环醇和无环酰基胺类物质（约85％），并完全去除其中的一部分，同时去除酸，酯和酮类物质（约65％）和带有苯环的物种，诸如芳香烃，羟苯，芳香醇和芳香酰基胺等部分被去除（〜50％）。

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