Fungal dynamics during anaerobic digestion of sewage sludge combined with food waste at high organic loading rates in immersed membrane bioreactors. (September 2021)

• Record Type: Journal Article
• Authors: Qin, Shiyi; Wainaina, Steven; Awasthi, Sanjeev Kumar; Mahboubi, Amir; Liu, Tao; Liu, Huimin; Zhou, Yuwen; Liu, Hong; Zhang, Zengqiang; Taherzadeh, Mohammad J.; Awasthi, Mukesh Kumar
• Is Part Of: Bioresource technology. Volume 335(2021)
• Publication Date: 2021-09
• Subjects: Organic loading rate -- Acidogenic fermentation -- Fungal community -- Immersed membrane bioreactor -- Volatile fatty acids; 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.2021.125296
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: The relative abundance of fungal community and organic loading rates was studied. Ascomycota, Basidiomycota, and Chytridiomycota were richer in higher ORLs. A higher organic loading rate was beneficial to fungal community succession. Higher organic loading rate has significant correlation among the analyzed parameters. Abstract: In this study, the influence of distinct hydraulic retention times (HRT) and organic loading rates (OLRs) on fungal dynamics during food waste anaerobic digestion in immersed membrane-based bio-reactors (iMBR) were investigated. The organic loading rate 4–8 g VS/L/d (R1) and 6–10 g VS/L/d (R2) were set in two iMBR. T1 (1d), T2 (15d) and T3 (34d) samples collected from each bioreactor were analyzed fungal community by using 18s rDNA. In R2, T2 had the most abundant Ascomycota, Basidiomycota, Chytridiomycota and Mucoromycota . As for R1, T3 also had the richest Cryptomycota except above four kinds of fungi. Subsequently, the Principal Component Analysis (PCA) and Non-Metric Multi-Dimensional Scaling (NMDS) indicated that fungal diversity was varied among the all three phases (T1, T2, and T3) and each treatment (R1 and R2). Finally, the results showed that different OLRs and HRT have significantly influenced the fungal community.