浸没式膜生物反应器在高有机负荷率下处理污水污泥和食物垃圾时真菌的动态变化。
Fungal dynamics during anaerobic digestion of sewage sludge combined with food waste at high organic loading rates in immersed membrane bioreactors.
机构信息
College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China.
Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden.
出版信息
Bioresour Technol. 2021 Sep;335:125296. doi: 10.1016/j.biortech.2021.125296. Epub 2021 May 17.
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.
在这项研究中，研究了不同水力停留时间（HRT）和有机负荷率（OLR）对浸没式膜生物反应器（iMBR）中食物垃圾厌氧消化过程中真菌动态的影响。在两个 iMBR 中分别设定了有机负荷率 4-8 g VS/L/d（R1）和 6-10 g VS/L/d（R2）。从每个生物反应器中采集了 T1（1d）、T2（15d）和 T3（34d）样品，通过 18s rDNA 分析真菌群落。在 R2 中，T2 具有最丰富的子囊菌门、担子菌门、壶菌门和毛霉门。对于 R1，除了上述四种真菌外，T3 还拥有最丰富的隐真菌门。随后，主成分分析（PCA）和非度量多维尺度分析（NMDS）表明，真菌多样性在所有三个阶段（T1、T2 和 T3）和每个处理（R1 和 R2）之间存在差异。最后，结果表明，不同的 OLR 和 HRT 对真菌群落有显著影响。
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