Advanced regeneration and fixed-bed study of ammonium and potassium removal from anaerobic digested wastewater by natural zeolite

被引：30

作者：

Guo, Xuejun ^{[1
,2
]}

Zeng, Larry ^{[2
]}

Jin, Xin ^{[1
]}

机构：

[1] Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing 100875, Peoples R China

[2] Alberta Res Council Inc, Environm Technol, Vegreville, AB T9C IT4, Canada

来源：

JOURNAL OF ENVIRONMENTAL SCIENCES | 2013年 / 25卷 / 05期

关键词：

regeneration; removal; ammonium; potassium; natural zeolite; ION-EXCHANGE; AQUEOUS-SOLUTION; BIOLOGICAL REGENERATION; CHINESE CLINOPTILOLITE; AUSTRALIAN ZEOLITE; CO-DIGESTION; COLUMN; MANURE; WASTEWATERS;

D O I：

10.1016/S1001-0742(12)60115-6

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Highly efficient regeneration of natural zeolite was developed in conjunction with the removal of high concentrations of ammonia and potassium from the reverse osmosis effluent of anaerobic-digested wastewater by fixed-bed ion exchange. The elution and uptake behavior of ammonium and potassium in the fixed bed were studied. Both batch desorption tests and on-column regeneration were conducted to develop an optimum regeneration condition compatible with the wastewater requirements. The effectiveness of ammonium elution increased with increasing alkaline concentration. The increase of salt dose significantly enhanced the ammonium maximum in the elution solution. Complete ammonium elution was achieved in 6 bed volumes (BV) when the alkaline and salt concentrations were respectively 0.1 mol/L and 18.6 g/L at a flow rate of 2.5-3.0 BV/hr. Due to the higher affinity of potassium with natural clinoptilolite, complete potassium elution was not achieved in all cases.

引用

页码：954 / 961

页数：8

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