Removal of ammonium nitrogen from pretreated domestic sewage using a natural ion exchanger

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	Removal of ammonium nitrogen from pretreated domestic sewage using a natural ion exchanger
	Aiyuk, S ; Xu, H ; van Haandel, A ; Verstraete, W
刊名	ENVIRONMENTAL TECHNOLOGY
	2004
卷号	25 期号:11 页码:1321-1330
关键词	sewage treatment nutrient removal clinoptilolite ion selectivity chemical regeneration
ISSN号	0959-3330
通讯作者	Verstraete, W, State Univ Ghent, LabMET, Coupure Links 653, B-9000 Ghent, Belgium
中文摘要	Ammonium nitrogen was removed from pretreated domestic sewage using a natural zeolite-clinoptilolite, applying a column with downflow regime. The pretreated wastewater had an average total ammonium nitrogen (TAN) of 23 mg I-1. Ion exchange was allowed to take place under normal sewage treatment plant conditions and tropical temperature setting. The sorption capacity of the natural clinoptilolite was studied with the column fitted to a chemically enhanced primary treatment (CEPT)-upflow anaerobic sludge blanket (UASB) system, operating at 33degreesC. Optimal operational cation exchange capacity (CEC) of 14 g TAN kg(-1) zeolite was obtained for the zeolite granulometry of 1-2.5 mm in a reversible way. The treatment was done at 3.9 bed volumes (BV) per day, and breakthrough was attained after about 560 BV. Regeneration of exhausted zeolite was effected with a 25 g NaCl l(-1) salt solution, rendering the column amenable to reuse. Employing a 3-column test and bed contact times of 6, 2.6 and 1.1 minutes, the use of pretreated wastewater with average concentration of 38 mg NH4+-N l(-1) showed that the operational cation exchange capacity also depended on flow rate, with the removal efficiency decreasing from 95 to 47 % with increase in the flow rate. Overall, the approach of removing TAN from digested sewage offers potential to recover the TAN from the domestic wastewater, thus minimizing the need for subsequent nitrification-denitrification of the whole water volume.
学科主题	Environmental Sciences
收录类别	SCI
语种	英语
WOS记录号	WOS:000226354500012
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/55207]
专题	沈阳应用生态研究所_沈阳应用生态研究所_期刊论文
推荐引用方式 GB/T 7714	Aiyuk, S,Xu, H,van Haandel, A,et al. Removal of ammonium nitrogen from pretreated domestic sewage using a natural ion exchanger[J]. ENVIRONMENTAL TECHNOLOGY,2004,25(11):1321-1330.
APA	Aiyuk, S,Xu, H,van Haandel, A,&Verstraete, W.(2004).Removal of ammonium nitrogen from pretreated domestic sewage using a natural ion exchanger.ENVIRONMENTAL TECHNOLOGY,25(11),1321-1330.
MLA	Aiyuk, S,et al."Removal of ammonium nitrogen from pretreated domestic sewage using a natural ion exchanger".ENVIRONMENTAL TECHNOLOGY 25.11(2004):1321-1330.