A modified BAF system configuring synergistic denitrification and chemical phosphorus precipitation: Examination on pollutants removal and clogging development

被引：32

作者：

Wang, Hongjie ^{[1
]}

Dong, Wengyi ^{[1
]}

Li, Ting ^{[2
]}

Liu, Tongzhou ^{[1
]}

机构：

[1] Harbin Inst Technol, Shenzhen Grad Sch, Shenzhen Key Lab Water Resource Utilizat & Enviro, Shenzhen 518055, Peoples R China

[2] Space Sci & Technol Inst South China, Shenzhen 518100, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2015年 / 189卷

关键词：

BAF; Pre-denitrification; Chemical phosphorus precipitation; Ferrous iron; Clogging development; BIOLOGICAL AERATED FILTER; WASTE-WATER; NITROGEN REMOVAL; NITRIFICATION; OXIDATION; SIZE; IRON;

D O I：

10.1016/j.biortech.2015.03.132

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The performance of a BAF system configuring simultaneous chemical phosphorus precipitation in the pre-denitrification stage was examined using a continuously operated setup to treat real domestic wastewater. The effects of using no chemical, dosing sole Fe2+, and dosing combined Fe2+, PAM, and NaHCO3 in the pre-denitrification tank were assessed by monitoring COD, nitrogen, and phosphorus removal and hydraulic headloss development in the BAF column. Though dosing sole Fe2+ significantly enhanced phosphorus removal, it would consume alkalinity through hydrolysis and form smaller-sized sludge flocs in the pre-denitrification tank, and hence resulted in affected NH4+-N, insoluble COD, and SS removal in the BAF. Dosing combined Fe2+, PAM, and NaHCO3 can enhance sludge flocculation to form larger flocs and compensate alkalinity consumption. It exhibited sound performance on COD, nitrogen, and phosphorus removal, and led to less frequent BAF backwashing by slowing clogging development in the BAF filter layer. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：44 / 52

页数：9

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