硫酸盐
化学
活性污泥
生物降解
硫酸盐还原菌
基质(水族馆)
废水
微生物
碱度
酵母
污水处理
制浆造纸工业
乙醇燃料
环境化学
发酵
废物管理
化学需氧量
细菌
环境科学
环境工程
食品科学
生物化学
有机化学
生物
生态学
工程类
遗传学
作者
Tülay Yılmaz,Deniz Uçar
摘要
Abstract BACKGROUND The cost of the substrate plays a crucial role in sulfate‐containing wastewater treatment. Utilizing a natural or low‐cost substrate is essential for effective sulfate reduction. This study investigates and compares the sulfate reduction performance of excess yeast and excess activated sludge as substrates to that of ethanol, one of the most commonly used substrates. RESULTS Both waste sludge groups underwent initial anaerobic digestion and were subsequently fed into an anaerobic up‐flow bed reactor. The reactor operated through five periods using synthetic water containing 2000 mg SO 4 2− L −1 . To assess electron donor performance during transitions between carbon sources, famine periods (without substrate addition) were implemented. Maximum sulfate reduction efficiencies for ethanol, excess yeast and excess activated sludge, and yeast were 89%, 54% and 70%, respectively, with corresponding chemical oxygen demand oxidation rates of 86%, 81% and 92%. The ethanol‐fed period exhibited the highest sulfide (720 mg L −1 on day 116) and alkalinity (2035 mg CaCO 3 L −1 on day 109) production. It is evident that waste activated sludge, primarily composed of prokaryotic bacteria, was more susceptible to biodegradation than eukaryotic waste yeast. CONCLUSIONS While ethanol is a favorable source of electrons, this study suggests that the waste products of biological processes can serve as an alternative to ethanol for sulfate reduction. This approach has the potential to reduce operating costs in treatment systems by using biological waste as a carbon source. © 2023 The Authors. Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).
科研通智能强力驱动
Strongly Powered by AbleSci AI