Coagulation of landfill leachate by FeCl3: process optimization using Box–Behnken design (RSM)

被引：30
作者：
Kumar S.S. [1 ]
Bishnoi N.R. [1 ]
机构：
[1] Department of Environmental Science and Engineering, Guru Jambheshwar University of Science and Technology, Hisar, 125001, Haryana
来源：
Applied Water Science | 2017年 / 7卷 / 4期
关键词：
Box–Behnken design; Coagulation; COD; Decolorization; Ferric chloride; Landfill leachate; Optimization; Phosphate removal; Response surface methodology; Sulfate removal;
D O I：
10.1007/s13201-015-0372-1
中图分类号：
学科分类号：
摘要：
FeCl3 coagulation was used to achieve maximum reduction of COD, phosphate, sulfate and color and process optimization (FeCl3 dosage, pH, reaction time) was done by BBD-RSM. Responses were recorded in terms of EC, COD, phosphate, color and sulfate removal. Variables A (pH) and B (reaction time) were negatively related to removal of COD and phosphate, whereas, C (FeCl3 dosage) was positive in case of COD removal and negative for phosphate removal. pH and coagulant dosage had negative relationship with color removal; however, reaction time showed positive relationship. In case of percent sulfate removal, variable A (pH) demonstrated negative relationship whereas B (reaction time) and C (FeCl3 dosage) were found to be positively related. Numerical optimization of the model revealed a maximum reduction of 71, 93, 86 and 99.6 % COD, phosphate, color and sulfate at optimal FeCl3 dosage = 3 g/l, pH 8, and reaction time = 95 min. © 2015, The Author(s).
引用
收藏
页码：1943 / 1953
页数：10
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