Co-treatment of reject water from sludge dewatering and supernatant from sludge lime stabilization process for nutrient removal: A cost-effective approach

被引：38

作者：

Hu, Dalong ^{[1
]}

Zhou, Zhen ^{[1
]}

Niu, Tianhao ^{[1
]}

Wei, Haijuan ^{[2
]}

Dou, Weixiao ^{[1
]}

Jiang, Lu-Man ^{[1
]}

Lv, Yan ^{[2
]}

机构：

[1] Shanghai Univ Elect Power, Coll Environm & Chem Engn, 2588 Changyang Rd, Shanghai 200090, Peoples R China

[2] Shanghai Chengtou Wastewater Treatment Co Ltd, Shanghai 201203, Peoples R China

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2017年 / 172卷

基金：

中国国家自然科学基金;

关键词：

Reject water; Sludge lime stabilization; Membrane bioreactor; Fouling; Microbial community; SUBMERGED MEMBRANE BIOREACTOR; BIOLOGICAL NITROGEN REMOVAL; WASTE-WATER; COMMUNITY STRUCTURE; PH; MECHANISMS; IMPROVEMENT; PHOSPHORUS;

D O I：

10.1016/j.seppur.2016.08.032

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A cost-effective method for reject water treatment by reusing supernatant from sludge lime stabilization (SLS) process was investigated to achieve simultaneous COD, nitrogen and phosphorus removal. SLS supernatant was characterized as an alkaline wastewater containing high concentrations of calcium ion, alkalinity, biodegradable COD and ammonium nitrogen. Dosing SLS supernatant into a membrane bioreactor for reject water treatment enhanced COD and phosphorus reduction by 105.1% and 184.6%, increased pH of mixed liquor, formed large sludge flocs and mitigated membrane fouling. Illumina-MiSeq sequencing showed that SLS supernatant addition also increased microbial abundance and biodiversity, enriched nitrifying biomass, and converted predominant ammonia oxidizing genera from Nitrosospira to Nitrosomonadaceae_uncultured and Nitrosomonas. The combined treatment of reject water using a proposed step-feeding oxicianoxicioxic process can utilize biodegradable COD in SLS supernatant for denitrification, fully compensate alkalinity for nitrification, and save costs of phosphorus precipitants, external carbon and alkalinity. The results suggest that co-treatment of reject water and SLS for nutrient removal was technically and economically effective. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：357 / 365

页数：9

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