Department of Environmental Engineering, Faculty of Engineering and Green Technology (FEGT), Universiti Tunku Abdul Rahman, 31900 Kampar, Perak, Malaysia.
Department of Environmental Engineering, Faculty of Engineering and Green Technology (FEGT), Universiti Tunku Abdul Rahman, 31900 Kampar, Perak, Malaysia.
J Environ Manage. 2018 Jan 1;205:244-252. doi: 10.1016/j.jenvman.2017.09.068. Epub 2017 Oct 6.
The increase in landfill leachate generation is due to the increase of municipal solid waste (MSW) as global development continues. Landfill leachate has constantly been the most challenging issue in MSW management as it contains high amount of organic and inorganic compounds that might cause pollution to water resources. Biologically treated landfill leachate often fails to fulfill the regulatory discharge standards. Thus, to prevent environmental pollution, many landfill leachate treatment plants involve multiple stages treatment process. The Papan Landfill in Perak, Malaysia currently has no proper leachate treatment system. In the current study, sequential treatment via sequencing batch reactor (SBR) followed by coagulation was used to treat chemical oxygen demand (COD), ammoniacal nitrogen (NH-N), total suspended solids (TSS), and colour from raw landfill leachate. SBR optimum aeration rate, L/min, optimal pH and dosage (g/L) of Alum for coagulation as a post-treatment were determined. The two-step sequential treatment by SBR followed by coagulation (Alum) achieved a removal efficiency of 84.89%, 94.25%, 91.82% and 85.81% for COD, NH-N, TSS and colour, respectively. Moreover, the two-stage treatment process achieved 95.0% 95.0%, 95.3%, 100.0%, 87.2%, 62.9%, 50.0%, 41.3%, 41.2, 34.8, and 22.9 removals of Cadmium, Lead, Copper, Selenium, Barium, Iron, Silver, Nickel, Zinc, Arsenic, and Manganese, respectively.
随着全球发展的继续，垃圾填埋场渗滤液的产生量不断增加，这是由于城市固体废物（MSW）的增加所致。由于垃圾填埋场渗滤液含有大量的有机和无机化合物，可能会对水资源造成污染，因此一直是 MSW 管理中最具挑战性的问题。经过生物处理的垃圾填埋场渗滤液往往无法达到规定的排放标准。因此，为了防止环境污染，许多垃圾填埋场渗滤液处理厂都涉及多个阶段的处理过程。马来西亚霹雳州的帕潘垃圾填埋场目前没有适当的渗滤液处理系统。在本研究中，采用序批式反应器（SBR）和混凝沉淀法的顺序处理工艺，对原始垃圾填埋场渗滤液中的化学需氧量（COD）、氨氮（NH3-N）、总悬浮固体（TSS）和色度进行处理。确定了 SBR 的最佳曝气速率（L/min）、最佳 pH 值和聚合氯化铝（Alum）的投加量（g/L）作为后处理。SBR 序批式反应器和混凝沉淀（Alum）两步顺序处理工艺对 COD、NH3-N、TSS 和色度的去除效率分别达到 84.89%、94.25%、91.82%和 85.81%。此外，该两级处理工艺对镉、铅、铜、硒、钡、铁、银、镍、锌、砷和锰的去除率分别达到 95.0%、95.3%、100.0%、87.2%、62.9%、50.0%、41.3%、41.2%、34.8%和 22.9%。
