废铁屑协同曝气去除污水硫化物效能及机制

赵航; 张志强; 金峰; 卢金锁

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中国环境科学 ›› 2024, Vol. 44 ›› Issue (11) : 6148-6155.

水污染与控制

废铁屑协同曝气去除污水硫化物效能及机制

赵航¹, 张志强^1,2, 金峰¹, 卢金锁^1,2

作者信息 +

Efficacy of sewage sulfide removal by co-aeration of scrap iron filings

ZHAO Hang¹, ZHANG Zhi-qiang^1,2, JIN Feng¹, LU Jin-suo^1,2

Author information +

文章历史 +

摘要

The iron-oxygen-sulfide control system was constructed by the synergistic aeration technology through the processing of industrial scrap irons into the wastewater. The scrap irons were used to enhance the oxidation process of sulfide by oxygen to improve the inefficiency of traditional aeration and oxygenation to control sulfide in the water phase. A simulated wastewater pipeline reactor was constructed, and the iron-oxygen system composed of scrap iron filings and dissolved oxygen was evaluated for the control of sulfide by regulating the amount of scrap iron filings and the pH value of wastewater. The iron-oxygen system was compared with the direct catalytic oxygen oxidation process of Fe²⁺ and Fe³⁺, and its sulfide control mechanism was explored by the first-order rate equation of total sulfide concentration, and the effectiveness of the iron-oxygen system for the long-term control of sulfide was verified in a continuous flow reactor. The results showed that the sulfide in the wastewater could be removed nearly 100% within 10min when the dosage of scrap iron filings was above 40g/L, and the increase in pH of the wastewater was favorable to the removal of sulfide. In a 30 day continuous flow test, the sulfide concentration was below the detection limit at a gas-to-water ratio of (2 + 1.25)% iron filings, and the average H₂S concentration in the gas-phase space of the reactor was maintained at 20.5×10^-6.

Abstract

导出引用

赵航, 张志强, 金峰, 卢金锁. 废铁屑协同曝气去除污水硫化物效能及机制[J]. 中国环境科学. 2024, 44(11): 6148-6155

ZHAO Hang, ZHANG Zhi-qiang, JIN Feng, LU Jin-suo. Efficacy of sewage sulfide removal by co-aeration of scrap iron filings[J]. China Environmental Science. 2024, 44(11): 6148-6155

中图分类号： X703.5

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