ABSTRACT

Landfill leachate is a liquid generated due to rainwater percolation through the waste in a landfill or dumping site that may contain high levels of organic matter, both biodegradable and non-biodegradable, which are the major sources of water pollution. Chemical oxygen demand (COD) and Ammoniacal Nitrogen (NH₃-N) contents have been relevant indicators of severity and pollution potential of landfill leachate. The reductions of COD and NH₃-N were investigated in this study using different combinations of media ratios of green mussel (GM) and zeolite (ZEO). Generally, ZEO is considered as a renowned adsorbent but with a relatively high in cost. In Malaysia, mussel shell is abundantly available as a by-product from the seafood industry, is regarded as waste, and is mostly left at the dumpsite to naturally deteriorate. Its quality and availability make GMs a cost-effective material. In this research study, leachate samples were characterized and found to contain high concentrations of COD and NH₃-N. The adsorption process was conducted to find out the best combination media ratio between GM and ZEO. The removing efficiency was determined at different amounts of composite media ratios. The optimal adsorbent mixture ratios between (GM: ZEO) of 1.0:3.0 and 1.5:2.5 were considered as a more efficient technique in removing COD and NH₃-N compared to exploiting these adsorbents individually. The optimal extenuation removal reduction was found at an approximately 65% of COD and 78% of NH₃-N. The adsorption Isotherm Langmuir model exhibited a better fit with high regression coefficient for COD (R² = 0.9998) and NH₃-N (R² = 0.9875), respectively. This means that the combination of GM: ZEO adsorption of landfill leachate in this analysis is homogeneous with the monolayer. The mixture of GMs and ZEO was observed to provide an alternative medium for the reduction of COD and NH₃-N with comparatively lower cost.

Implications: The concentration of organic constituents (COD) and ammoniacal nitrogen in stabilized landfill leachate have significantly strong influences of human health and the environment. The combination of mixing media green mussel and zeolite adsorbent enhancing organic constituents (COD) and ammoniacal nitrogen reduction efficiency from leachate. This would be greatly applicable in future research as well as conventionally minimizing high cost materials like zeolite, thereby lowering the operating cost of leachate treatment.

摘要

垃圾填埋场渗滤液是由于雨水渗入垃圾填埋场或倾倒场的废物而产生的液体，其中可能含有高水平的可生物降解和不可生物降解的有机物，这是水污染的主要来源。化学需氧量（COD）和氨氮（NH ₃ -N）含量一直是垃圾渗滤液严重程度和污染潜力的相关指标。COD和NH _3的减少-N 在本研究中使用绿贻贝 (GM) 和沸石 (ZEO) 的不同介质比例组合进行了研究。通常，ZEO被认为是一种著名的吸附剂，但成本相对较高。在马来西亚，贻贝壳作为海鲜工业的副产品大量供应，被视为废物，大多留在垃圾场自然变质。它的质量和可用性使 GM 成为一种具有成本效益的材料。在这项研究中，对渗滤液样品进行了表征，发现其含有高浓度的 COD 和 NH ₃-N。进行吸附过程以找出GM和ZEO之间的最佳组合介质比。去除效率是在不同数量的复合介质比率下确定的。与单独使用这些吸附剂相比，1.0:3.0 和 1.5:2.5 之间的最佳吸附剂混合比 (GM: ZEO) 被认为是一种更有效的去除 COD 和 NH _{3 -N 的技术。在大约 65% 的 COD 和 78% 的 NH 3} -N时发现了最佳的稀释去除减少。吸附等温线 Langmuir 模型对 COD (R ²  = 0.9998) 和 NH ₃ -N (R ² = 0.9875），分别。这意味着该分析中垃圾渗滤液的 GM：ZEO 吸附与单层的结合是均匀的。观察到 GM 和 ZEO 的混合物以相对较低的成本为减少 COD 和 NH _{3 -N 提供了一种替代介质。}

启示：稳定的垃圾填埋场渗滤液中有机成分 (COD) 和氨氮的浓度对人类健康和环境具有显着的强烈影响。混合介质绿贻贝和沸石吸附剂的组合增强了有机成分 (COD) 和渗滤液中氨氮的减少效率。这将极大地适用于未来的研究以及传统上最大限度地减少沸石等高成本材料，从而降低渗滤液处理的运营成本。