Synergistic effect of yeast integrated with alkyl polyglucose for short-chain fatty acids production from sludge anaerobic fermentation

Jinghua Lv; Lirong Yao; Yuge Liang; Siqi He; Shujia Zhang; Tianyu Shi; Li Gong; Hailong Li; Yunbei Li; Tonghuan Yu; Yanzhuo Zhang

doi:10.1016/j.biortech.2022.128092

Synergistic effect of yeast integrated with alkyl polyglucose for short-chain fatty acids production from sludge anaerobic fermentation

Bioresour Technol. 2022 Nov:364:128092. doi: 10.1016/j.biortech.2022.128092. Epub 2022 Oct 10.

Authors

Jinghua Lv¹, Lirong Yao², Yuge Liang², Siqi He², Shujia Zhang², Tianyu Shi², Li Gong², Hailong Li², Yunbei Li², Tonghuan Yu², Yanzhuo Zhang²

Affiliations

¹ School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007, PR China. Electronic address: lvjinghua@htu.edu.cn.
² School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007, PR China.

PMID: 36229007
DOI: 10.1016/j.biortech.2022.128092

Abstract

An efficient strategy for short-chain fatty acid (SCFA) production from sludge anaerobic fermentation was proposed with the combination of yeast and alkyl polyglucose (APG). It revealed that the synergetic effect of yeast and APG could boost the SCFA concentration to the maximum value of 2800.34 mg COD/L within 9 days at 0.20 g/g suspended solids (SS) yeast and 0.20 g/g SS APG, which was significantly higher than that of its counterparts. Interestingly, the sludge solubilization, the biodegradability of fermentation substrate, as well as the acidification of hydrolyzed products, was evidently improved in the coexistence of APG and yeast. The activities of hydrolytic enzymes and acetate kinase were also stimulated, whereas the coenzyme F420 was inhibited. The synergetic effect of yeast and APG used in this work enriches the study of carbon resource recovery from sludge anaerobic fermentation.

Keywords: Alkyl polyglucose; Anaerobic fermentation; Short chain fatty acids; Waste activated sludge; Yeast.