Impact of goethite dosed continuous stirred tank reactor on continuous methane production at different organic loading rates. (28th September 2019)

• Record Type: Journal Article
• Authors: Wan, Zhanghong; Peng, Shuchuan; Zhang, Xun; Wang, Jin; Li, Xiangming; Yue, Zhengbo
• Is Part Of: Water environment research. Volume 92:Number 2(2020)
• Page Start: 173
• Page End: 176
• Publication Date: 2019-09-28
• Subjects: continuous stirring tank reactor -- glucose -- goethite -- methane -- organic loading rate; Water quality management -- Periodicals; Water -- Purification -- Periodicals; Water -- Pollution -- Periodicals; Water -- Pollution; Water -- Purification; Water quality management; Sewage; Water Pollution; Periodicals; Electronic journals; Periodicals; 628.16
• DOI: 10.1002/wer.1222
• Languages: English
• ISSNs: 1061-4303

Abstract

Abstract: Iron oxides facilitated anaerobic digestion process has been attracted more and more attention in the renewable energy production area. In the current study, goethite was added into the continuous stirred tank reactor with glucose as the substrate. Effect of the influent organic loading rate (OLR) on the reactor performances was explored. Results showed that goethite promoted the methane production significantly ( p < 0.05) when OLR was changed between 1.20 and 1.80 g glucose L −1 day −1 . Compared to the control reactor, addition of goethite improved the methane production by13.4%–22.9%. The iron reduction rate had a positive correlation with the methane production rate. Microbial community analysis results showed that OLRs influenced the dominant methanogenic species in the both reactors. Methanothrix, Methanobacterium, Methanosarcina, and Methanocella were dominant under various OLR levels. Practitioner points: Goethite could promote the methanogenic process of glucose in the CSTRs under certain levels of OLRs. Iron reduction rate had a positive correlation with the methane production rate. OLRs influenced the dominant methanogenic species in the goethite‐dosed reactors. Abstract : Goethite promoted methane production in continuous stirring tank reactors and the maximum methane production rate was 247 ± 15 ml L −1 day −1 in goethite dosed reactor. Methanosarcina comprised higher percentage in the community with goethite addition.