Hydrodynamic disintegration of thickened excess sludge and maize silage to intensify methane production: Energy effect and impact on microbial communities

被引：9

作者：

Garlicka, Agnieszka ^{[1
]}

Umiejewska, Katarzyna ^{[2
]}

Nielsen, Per Halkjaer ^{[3
]}

Muszynski, Adam ^{[2
]}

机构：

[1] Joint Stock Co, Res & New Technol Off, Municipal Water Supply & Sewerage Co Capital City, Warsaw, Poland

[2] Warsaw Univ Technol, Fac Bldg Serv Hydro & Environm Engn, Warsaw, Poland

[3] Aalborg Univ, Ctr Microbial Communities, Dept Chem & Biosci, Aalborg, Denmark

来源：

BIORESOURCE TECHNOLOGY | 2023年 / 376卷

关键词：

Co; -digestion; Mechanical pretreatment; Renewable energy; Microbial communities; Bioavailability; CIRCULAR ECONOMY; CO-DIGESTION; WASTE; EXTRAPOLATION; PRETREATMENT; RAREFACTION;

D O I：

10.1016/j.biortech.2023.128829

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The aim of this project was to study the combination of two methods to increase methane production: feedstock pretreatment by hydrodynamic disintegration and co-digestion of maize silage (MS) with thickened excess sludge (TES). Disintegration of TES alone resulted in a 15% increase in specific methane production from 0.192 Nml/ gVS (TES + MS) to 0.220 Nml/gVS (pretreated TES + MS). The energy balance revealed additional energy (0.14 Wh) would cover only the energy expenditure for the mechanical pretreatment and would not allow for net energy profit. Identification of the methanogenic consortia by 16S rRNA gene amplicon sequencing revealed that Chloroflexi, Bacteroidota, Firmicutes, Proteobacteria and Actinobacteriota were five most abundant bacteria phyla, with Methanothrix and Methanolinea as the dominant methanogens. Principal component analysis did not show any effect of feedstock pretreatment on methanogenic consortia. Instead, the composition of inoculum was the decisive factor in shaping the microbial community structure.

引用

页数：11

共 47 条

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