| Title: | Unraveling the role of polyferric chloride in anaerobic digestion of waste activated sludge |
| Address: | "College of Environment and Resources, Xiangtan University, Xiangtan 411105, China. College of Environment and Resources, Xiangtan University, Xiangtan 411105, China. Electronic address: chenhongbo@hnu.edu.cn" |
| DOI: | 10.1016/j.biortech.2021.126620 |
| ISSN/ISBN: | 1873-2976 (Electronic) 0960-8524 (Linking) |
| Abstract: | "This study explored the effect of polyferric chloride (PFC) as a flocculant on waste activated sludge anaerobic digestion. The results verified that PFC has an inhibitory effect on methane production during anaerobic digestion. PFC with a concentration of 40 g/kg total suspended solids reduced methane production from 195 +/- 2.10 to 156 +/- 1.50 L/kg volatile suspended solids, a decrease of 20.0 +/- 0.09%. PFC released hydroxyl polymers and Fe(III). Hydroxy polymers aggregated sludge flocs and hindered the release of dissolved organic matter. Fe(III) induced dissimilar iron reduction processes to contend with methyl-CoM for electrons, thereby further reducing methane production. In addition, PFC enriched iron-reducing bacteria and reduced the abundance of methanogens, resulting in microbial communities that are not conducive to methane production. This article puts forward innovative insights on the role of PFC in biological sludge treatment, which is expected to guide the flocculant selection during wastewater treatment" |
| Keywords: | "Anaerobiosis Bioreactors *Ferric Compounds Methane *Sewage Waste Disposal, Fluid Anaerobic digestion Flocculants Hydroxy polymers Polyferric chloride Waste activated sludge;" |
| Notes: | "MedlineZhu, Sijing Chen, Hongbo eng England 2021/12/28 Bioresour Technol. 2022 Feb; 346:126620. doi: 10.1016/j.biortech.2021.126620. Epub 2021 Dec 24" |
