Iron carbon particle dosing for odor control in sewers: Laboratory tests
Iron carbon particle dosing for odor control in sewers: Laboratory tests
复制标题
用于控制下水道气味的铁碳颗粒剂量：实验室测试
DOI：
10.1016/j.envres.2022.114476
复制
发表时间：
2022
影响因子：
8.3
通讯作者：
Zhang Tuqiao
中科院分区：
文献类型：
--
作者：
Zhou Yongchao;Tang Lei;Zhang Wenming;Zhang Yiping;Fang Lei;Zhang Tuqiao
处理下水道系统中的恶臭是许多城市的优先事项，因为人类健康问题，下水道管道腐蚀预防。在本研究中，采用实验室规模的模拟重力流下水道系统的反应器，研究了铁碳（Fe-C）颗粒对液相硫化物、硫化氢（H2S）和甲基硫醇（MeSH）的去除效果。结果表明，在70 g/L和50 g/L Fe-C颗粒加入后，液相中硫化物由15.1 ~ 16.5 mg S/L降至0.05和0.14 mg S/L；H2S和MeSH在顶空气中的通量也受到抑制，其通量下降幅度高达99%。同时，对沉积物表面和水中硫酸还原菌（SRB）和硫氧化菌（SOB）的微生物群落结构进行了分析，结果表明，添加Fe-C颗粒后，水和沉积物表面硫酸还原菌（SRB）的相对丰度明显受到抑制，尤其是硫螺旋菌（sulfurospirillum）、梭状芽孢菌（Clostridium）和脱硫弧菌（desulfovibrio），而Fe-C颗粒则促进了SOB的生长。此外，通过x射线光电子能谱（XPS）对表面沉积进行了收集和分析，结果表明，硫化物可以与Fe-C微电解形成的铁离子共沉淀去除。本研究为控制污水系统原位臭气污染提供了新的途径。
Treatment of malodor in the sewer system is a priority in many municipalities for human health concerns, sewer pipe corrosion prevention. In this study, the removal effects of iron-carbon (Fe–C) particles on the inhibition of sulfide in the liquid phase, as well as hydrogen sulfide (H2S) and methyl mercaptan (MeSH) in the headspace were investigated using laboratory-scale reactors simulating gravity-flow sewer system. The results indicated that the sulfide in the liquid phase can be reduced from 15.1 to 16.5 mg S/L to 0.05 and 0.14 mg S/L after 70 g/L and 50 g/L Fe–C particles dosing. The flux of H2S and MeSH in the headspace was also inhibited, and its flux decreased by up to 99%. Meanwhile, the microbial community structures of sulfate-reducing bacteria (SRB) and sulfur-oxidizing bacteria (SOB) in the sediment surface and water were also analyzed, and the results revealed that the relative abundance of SRB in the water and sediment surface was inhibited greatly after adding Fe–C particles, especially forSulfurospirillum, Clostridium, andDesulfovibrio, while Fe–C particles promoted the growth of SOB. Moreover, the surface deposition was collected and analyzed through X-ray photoelectron spectroscopy (XPS), and the results indicated that sulfide can be removed by co-precipitation with ferrous ions formed through micro-electrolysis of Fe–C. This study provides a new approach to control the in-situ odor pollution for sewage systems.