A comparative study on the process efficiencies and microbial community structures of six full-scale wet and semi-dry anaerobic digesters treating food wastes. (December 2017)

• Record Type: Journal Article
• Authors: Han, Gyuseong; Shin, Seung Gu; Lee, Joonyeob; Shin, Juhee; Hwang, Seokhwan
• Is Part Of: Bioresource technology. Volume 245:Part A(2017)
• Page Start: 869
• Page End: 875
• Publication Date: 2017-12
• Subjects: TS content -- Solubilization rate -- Pyrosequencing -- Process parameter; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2017.08.167
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Wet digesters showed a higher process efficiency than semi-dry digesters. Bacterial and archaeal communities were distinctly characterized by key families. TS content, [TAN], and SCOD/COD in the digester were the discriminant parameters. Abstract: The purpose of this study was to investigate the effect of different types of food wastes on the process efficiency and microbial community structures in full-scale anaerobic digesters and to identify parameters that affect these criteria. Six full-scale anaerobic digesters were investigated; three were operated under "wet" condition (total solids TS ≤ 10%), and three were run under "semi-dry" condition (10% ≤ TS ≤ 20%). Removal efficiency of volatile solids was much higher in the wet digesters (75.2 ± 3.8%) than in the semi-dry digesters (42.6 ± 5.5%). The bacterial and archaeal communities were distinctly characterized by families Porphyromonadaceae, Sphingobacteriaceae, Syntrophomonadaceae, and Methanobacteriaceae in the wet digesters; and of Clostridiaceae, Patulibacteraceae, Pseudonocardiaceae, Lachnospiraceae, Rikenellaceae, and Methanomicrobiaceae in the semi-dry digesters. The discriminant parameters identified were TS content of influent, concentration of total ammonia nitrogen and the ratio of soluble chemical oxygen demand (COD) to COD in the digester.