中国环境科学

作者：赵航, 张志强, 金峰, 卢金锁

单位：1. 西安建筑科技大学环境与市政工程学院, 陕西省环境工程重点实验室, 陕西 西安 710055;2. 西安建筑科技大学, 西部绿色建筑国家重点实验室, 陕西 西安 710055

关键词：污水管道,废铁屑,曝气,硫化氢,以废治废

基金：国家自然科学基金资助项目(52370100)

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.

来源：2024年第11期

《中国环境科学》期刊编辑部

查看中国环境科学杂志2024年第11期