A review on the mechanism of adding iron and iron compounds to control volatile sulfur compounds during anaerobic digestion of sludge
JIAO Ling-jie1, LI Yong-mei1, WEI Hai-juan2, CHEN Guang2
1. State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; 2. Shanghai Chengtou Wastewater Treatment Co., Ltd., Shanghai 201203, China
Abstract：Anaerobic digestion is an effective method for sludge reduction and resource recovery. However, volatile sulfur compounds (VSCs) formed during the anaerobic digestion of sludge have caused many problems, such as reducing digestion efficiency, causing equipment corrosion, and damaging human health. In-situ sulfide control technologies like using iron or iron compounds are effective in controlling VSCs emissions. To deeply understand the role of iron in the anaerobic digestion process, this review summarized the formation mechanism of VSCs and focuses on the mechanism of controlling VSCs by adding iron salts, scrap iron, and iron ore. The practical applicability of adding iron and iron compounds to control VSCs in anaerobic digestion is evaluated, and the future research direction is prospected. This review provides ideas and strategies for cost-effective in situ VSCs control during anaerobic digestion processes.
焦玲洁, 李咏梅, 魏海娟, 陈广. 铁及其化合物控制污泥厌氧消化VSCs机理研究进展[J]. 中国环境科学, 2023, 43(7): 3454-3463.
JIAO Ling-jie, LI Yong-mei, WEI Hai-juan, CHEN Guang. A review on the mechanism of adding iron and iron compounds to control volatile sulfur compounds during anaerobic digestion of sludge. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(7): 3454-3463.
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