Potential use of oil palm trunk starch as coagulant and coagulant aid in semi-aerobic landfill leachate treatment

IF 2.4 4区环境科学与生态学 Q2 WATER RESOURCES

Water Quality Research Journal Pub Date : 2019-08-01 DOI:10.2166/WQRJ.2019.041

M. Yusoff, H. A. Aziz, M. Alazaiza, Long Rui

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引用次数: 22

Abstract

Landfill leachate is highly polluted wastewater and generated as a result of water infiltration through solid waste produced domestically and industrially. This study investigates the potential use of oil palm trunk starch (OPTS) and crosslinks oil palm trunk starch (C-OPTS) as coagulant and coagulant aid in tandem with polyaluminum chloride (PAC) for the treatment of landfill leachate. As primary coagulant, the optimum pH and dosage for OPTC were 7 and 500 mg/L, respectively. For C-OPTS, the optimum conditions were pH 8.3 and 1,000 mg/L C-OPTS dosage. However, the optimum conditions for PAC were pH 7 and 8,000 mg/L PAC dosage. Results show that OPTS demonstrated superior feasibility as a selective coagulant targeting heavy metals such as Mn (100% removal), Cu (95.6% removal), Zn (100% removal), and PO43− (100% removal), whereas C-OPTS can be employed as both bulk and selective coagulants. On the other hand, C-OPTS prevailed over PAC in Mn, Zn, PO43−, and chemical oxygen demand (COD) removals by huge margins of 100%, 54.8%, 24.3%, and 17.1%, respectively, without any pH adjustments and with optimum dosage 87.5% lower than that of PAC.

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油棕干淀粉作为混凝剂和助凝剂在半好氧垃圾渗滤液处理中的应用前景

垃圾填埋场渗滤液是一种高度污染的废水，是由于家庭和工业生产的固体废物渗入水而产生的。本研究探讨了油棕榈干淀粉(OPTS)和交联油棕榈干淀粉(C-OPTS)作为混凝剂和助凝剂与聚氯化铝(PAC)联用处理垃圾渗滤液的潜力。OPTC作为一级混凝剂的最佳pH为7 mg/L，投加量为500 mg/L。C-OPTS的最佳提取条件为pH 8.3，投加量为1000 mg/L。PAC的最佳提取条件为pH为7,PAC的投加量为8000 mg/L。结果表明，OPTS作为选择性混凝剂对锰(100%去除率)、铜(95.6%去除率)、锌(100%去除率)和PO43−(100%去除率)等重金属具有优越的可行性，而C-OPTS既可以作为整体混凝剂，也可以作为选择性混凝剂。另一方面，C-OPTS对Mn、Zn、PO43−和化学需氧量(COD)的去除率分别为100%、54.8%、24.3%和17.1%，且不需要调整pH值，其最佳投加量比PAC低87.5%。

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来源期刊

Water Quality Research Journal WATER RESOURCES-

CiteScore

4.50

自引率

8.70%

发文量