A critical review of chemical uses in urban sewer systems

被引:26
作者
Cen, Xiaotong [1 ]
Li, Jiuling [1 ]
Jiang, Guangming [2 ]
Zheng, Min [1 ]
机构
[1] Univ Queensland, Australian Ctr Water & Environm Biotechnol, St Lucia, Qld 4072, Australia
[2] Univ Wollongong, Sch Civil Min & Environm Engn, Wollongong, NSW 2522, Australia
基金
澳大利亚研究理事会;
关键词
Sewer network; Sulfide and methane control; Chemical dosing; Chemical cost; Online control; Urban wastewater system; Integration; WASTE-WATER TREATMENT; FREE NITROUS-ACID; HYDROGEN-SULFIDE EMISSION; ELECTROCHEMICAL PRODUCTION; CORRODING CONCRETE; PREDICTIVE CONTROL; METHANE PRODUCTION; OXYGEN INJECTION; ONLINE CONTROL; IRON SALTS;
D O I
10.1016/j.watres.2023.120108
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Chemical dosing is the most used strategy for sulfide and methane abatement in urban sewer systems. Although conventional physicochemical methods, such as sulfide oxidation (e.g., oxygen/nitrate), precipitation (e.g., iron salts), and pH elevation (e.g., magnesium hydroxide/sodium hydroxide) have been used since the last century, the high chemical cost, large environmental footprint, and side-effects on downstream treatment processes demand a sustainable and cost-effective alternative to these approaches. In this paper, we aimed to review the currently used chemicals and significant progress made in sustainable sulfide and methane abatement technology, including 1) the use of bio-inhibitors, 2) in situ chemical production, and 3) an effective dosing strategy. To enhance the cost-effectiveness of chemical applications in urban sewer systems, two research directions have emerged: 1) online control and optimization of chemical dosing strategies and 2) integrated use of chemicals in urban sewer and wastewater treatment systems. The integration of these approaches offers considerable systemwide benefits; however, further development and comprehensive studies are required.
引用
收藏
页数:13
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