Effects of zinc oxide nanoparticles on sludge anaerobic fermentation: phenomenon and mechanism. Issue 9 (28th July 2020)

• Record Type: Journal Article
• Authors: Jin, Baodan; Yuan, Yue; Zhou, Ping; Niu, Jiahui; Niu, Jintao; Dai, Jingwen; Li, Nuonan; Tao, Hongfan; Ma, Zhigang; Zhang, Ju; Zhang, Zhongfang; Li, Yu
• Is Part Of: Journal of environmental science and health. Volume 55:Issue 9(2020)
• Page Start: 1094
• Page End: 1103
• Publication Date: 2020-07-28
• Subjects: Anaerobic fermentation -- biodegradability -- zinc oxide nanoparticles -- biological enzyme -- microbial community; Environmental engineering -- Periodicals; Environmental sciences -- Periodicals; Ecology -- periodicals; Hazardous Substances -- periodicals; 628
• DOI: 10.1080/10934529.2020.1771120
• Languages: English
• ISSNs: 1093-4529

Abstract

Abstract: Zinc oxide nanoparticles (ZnO NPs) production and usage might lead to a large discharge of ZnO NPs into the natural environment, raising concerns of pollution and ecological security. The effects of ZnO NPs on waste activated sludge hydrolytic acidification and microbial communities were studied in semi-continuous fermentation systems. The fermentation performance of eight ZnO NPs concentrations including ZnO NPs normal [0.01, 0.1, 1 and 10 mg/g mixed liquor suspended solids (MLSS)] and ZnO NPs shock (10, 1000, 1000 and 10, 000 mg/g MLSS) were discussed, and their biodegradability was also analyzed. The experimental results showed that proteins, polysaccharides and short-chain fatty acids were enhanced by ZnO NPs, particularly by ZnO NPs shock. Low ZnO NPs concentrations inhibited coenzyme 420 (F420) and dehydrogenase activities but enhanced α-glucosidase and protease activities. Illumina MiSeq sequencing revealed that ZnO NPs addition enriched Azospira, Ottowia and Hyphomicrobium but not Anaerolineaceae .