Lim Chi Kim, Seow Ta Wee, Neoh Chin Hong, Md Nor Muhamad Hanif, Ibrahim Zaharah, Ware Ismail, Mat Sarip Siti Hajar
Department of Construction Management, Faculty of Technology Management and Business, Universiti Tun Hussein Onn Malaysia, 86400, Parit Raja Batu Pahat, Johor, Malaysia.
Centre for Environmental Sustainability and Water Security, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia.
3 Biotech. 2016 Dec;6(2):195. doi: 10.1007/s13205-016-0513-8. Epub 2016 Sep 7.
Sanitary landfilling is the most common way to dispose solid urban waste; however, improper landfill management may pose serious environmental threats through discharge of high strength polluted wastewater also known as leachate. The treatment of landfill leachate to fully reduce the negative impact on the environment, is nowadays a challenge. In this study, an aerobic sequencing batch reactor (ASBR) was proposed for the treatment of locally obtained real landfill leachate with initial ammoniacal nitrogen and chemical oxygen demand (COD) concentration of 1800 and 3200 mg/L, respectively. ASBR could remove 65 % of ammoniacal nitrogen and 30 % of COD during seven days of treatment time. Thereafter, an effective adsorbent, i.e., zeolite was used as a secondary treatment step for polishing the ammoniacal nitrogen and COD content that is present in leachate. The results obtained are promising where the adsorption of leachate by zeolite further enhanced the removal of ammoniacal nitrogen and COD up to 96 and 43 %, respectively. Furthermore, this combined biological-physical treatment system was able to remove heavy metals, i.e. aluminium, vanadium, chromium, magnesium, cuprum and plumbum significantly. These results demonstrate that combined ASBR and zeolite adsorption is a feasible technique for the treatment of landfill leachate, even considering this effluent's high resistance to treatment.
卫生填埋是处理城市固体废弃物最常见的方式；然而，不当的填埋管理可能会通过排放高强度污染废水（即渗滤液）对环境造成严重威胁。如今，处理填埋渗滤液以充分减少其对环境的负面影响是一项挑战。在本研究中，提出了一种好氧序批式反应器（ASBR）来处理当地获取的实际填埋渗滤液，其初始氨氮和化学需氧量（COD）浓度分别为1800mg/L和3200mg/L。ASBR在七天的处理时间内可去除65%的氨氮和30%的COD。此后，使用一种有效的吸附剂——沸石作为二级处理步骤，以去除渗滤液中存在的氨氮和COD。所获得的结果很有前景，沸石对渗滤液的吸附进一步将氨氮和COD的去除率分别提高到了96%和43%。此外，这种生物 - 物理联合处理系统能够显著去除重金属，即铝、钒、铬、镁、铜和铅。这些结果表明，即使考虑到这种废水对处理的高抗性，ASBR与沸石吸附相结合仍是一种处理填埋渗滤液的可行技术。
