Performance and mechanism of anaerobic biotrickling filter for removal of sulfite, sulfate, and hydrosulfite

Journal of Water Reuse and Desalination

Wang, Jianhua¹  Xue, Niantao¹  Zheng, Tianlong¹  Wang, Qunhui¹  Wang, Li² 

[1] Department of Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China;State Environmental Protection Engineering (Beijing) Center for Industrial Wastewater Pollution Control, Beijing Municipal Research Institute of Environmental Protection, 59 Xiaoyingfang Middle Street, Xicheng District, Beijing 100037, China

关键词: biotrickling filter;    carbon source;    flue gas desulfurization;    hydrosulfite (HSO3-);    sulfate (SO42-);    sulfite (SO32-);   

DOI  :  10.2166/wrd.2015.003

学科分类：工程和技术（综合）

来源: IWA Publishing

【 摘 要 】

A biotrickling filter (BTF) was designed for removal of sulfite (SO32−), sulfate (SO42−), and hydrosulfite (HSO−3) produced from flue gas adsorbent during dual-alkali flue gas desulfurization. With an SO32− concentration of 0.89 g-S/(L packing), BTF could completely remove SO32− within 3 h with an elimination capacity (EC) of 296 g-S/(m3h). With an SO42− concentration of 0.60 g-S/(L packing), the removal efficiency (RE) of SO42− reached 90.3% at 5.25 h and 95% at 24 h. With an HSO−3 concentration of 0.74 g-S/(L packing), HSO−3 could not be detected in the trickling liquid at 2 h with an EC of 370 g-S/(m3h). The difference in desulfurization performance of the BTF was minor when sodium lactate and sodium acetate were used as carbon sources. Acetate was more superior when taking both the carbon/sulfur ratio (C/S) and RE into account. The total dissolved sulfide yield was over 70% with sodium acetate as the carbon source, which was 15–20% higher than that with sodium lactate. Sodium lactate was not completely degraded and acetic acid was produced. All oxidation–reduction potential values were lower than −370 mV, indicating a perfect anaerobic condition in the BTF. The BTF could efficiently treat sulfite, sulfate, and hydrosulfite and could replace the regeneration stage of the dual-alkali process.

【 授权许可】

CC BY-NC-ND