Ammonium removal from digested effluent of swine wastewater by using solid residue from magnesium-hydroxide flue gas desulfurization process
文献类型： 外文期刊
作者： Lin, Huanjia 1 ; Lin, Yunqin 1 ; Wang, Dehan 1 ; Pang, Yuwan 1 ; Zhang, Fabao 2 ; Tan, Shuanhu 2 ;
作者机构： 1.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 570642, Guangdong, Peoples R China
2.Guangdong Acad Agr Sci, Inst Agr Resource & Environm, Guangzhou 570642, Guangdong, Peoples R China
关键词： Digested effluent of swine wastewater;Ammonium removal;Solid residue from MFGD process;MAP precipitation
期刊名称：JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY （ 影响因子：6.064； 五年影响因子：5.914 ）
ISSN： 1226-086X
年卷期： 2018 年 58 卷
页码：
收录情况： SCI
摘要： This paper focused on the ammonium removal from the digested effluent of swine wastewater (DESW) via MAP precipitation using the residue from magnesium-hydroxide flue gas desulfurization (MFGD) process as a Mg source. The MAP precipitation was proceeded in a 500-mL beaker with a magnetic stirrer. It was found that around 60% of ammonium in the DESW was removed at pH 9.5, HRT 10 min and the P:Mg:N molar ratio of 0.6:0.7:1. The NH4+ concentration (183.2 mg/L) in the DESW after MAP precipitation was lower than 200 mg L-1, being alternative for the downstream biological process. A low content of PO43- (3.64 mg L-1) and a high concentration of Mg2+ (67.17 mg L-1) were also observed in the solution. The main composition of the precipitate was proved to be MAP via XRD and SEM-EDX analysis. Besides, the total chemical cost was saved by 29.17% using the MFGD residue as a Mg source instead of the commercial MgCl2 center dot 6H(2)O. Hence, reusing MFGD residue as a Mg source to remove ammonium from the DESW was feasible with cost saving, resource recovery and environment protection. (C) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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