Sorption and biodegradation of artificial sweeteners in activated sludge processes

被引:78
|
作者
Ngoc Han Tran [1 ]
Gan, Jie [2 ]
Viet Tung Nguyen [2 ,3 ]
Chen, Huiting [2 ]
You, Luhua [2 ]
Duarah, Ankur [3 ]
Zhang, Lifeng [3 ]
Gin, Karina Yew-Hoong [2 ]
机构
[1] Natl Univ Singapore, NUS Environm Res Inst, Singapore 117411, Singapore
[2] Natl Univ Singapore, Fac Engn, Dept Civil & Environm Engn, Singapore 117576, Singapore
[3] PUB, WaterHub, Singapore, Singapore
基金
新加坡国家研究基金会;
关键词
Activated sludge process; Artificial sweeteners (ASs); Biodegradation; Sorption; Wastewater treatment plants (WWTPs); WASTE-WATER TREATMENT; AQUATIC ENVIRONMENT; RECLAMATION PLANT; SURFACE-WATER; SUCRALOSE; GROUNDWATER; FATE; SUITABILITY; BIOTRANSFORMATION; MICROPOLLUTANTS;
D O I
10.1016/j.biortech.2015.08.083
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
There is limited information on the occurrence and removal of artificial sweeteners (ASs) in biological wastewater treatment plants, and in particular, the contribution of sorption and biodegradation to their removal. This study investigated the fate of ASs in both the aqueous and solid phases in a water reclamation plant (WRP). All the four targeted ASs, i.e. acesulfame (ACE), sucralose (SUC), cyclamate (CYC) and saccharine (SAC), were detected in both the aqueous and solid phases of raw influent and primary effluent samples. The concentrations of CYC and SAC in secondary effluent or MBR permeate were below their method detection limits. ACE and SUC were persistent throughout the WRP, whereas CYC and SAC were completely removed in biological treatment (>99%). Experimental results showed that sorption played a minor role in the elimination of the ASs due to the relatively low sorption coefficients (K-d), where K-d < 500 L/kg. In particular, the poor removal of ACE and SUC in the WRP may be attributed to their physiochemical properties (i.e. logK(ow) < 0 or logD < 3.2) and chemical structures containing strong withdrawing electron functional groups in heterocyclic rings (i.e. chloride and sulfonate). (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:329 / 338
页数:10
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