Investigating role of corn stover biochar supplementation on continuous pilot scale anaerobic digestion: Performance and microbial community dynamics

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING

Bioresource Technology Pub Date : 2024-11-06 DOI:10.1016/j.biortech.2024.131767

Sachin Krushna Bhujbal , Preeti , Akshay Joshi , Pooja Ghosh , Virendra Kumar Vijay

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引用次数: 0

Abstract

Biochar supplementation could facilitate microbial colonization and increase biogas and methane yield in anaerobic digestion (AD). This study investigated the impact of corn stover biochar (CSB) augmentation on the continuous pilot scale AD of rice straw. The CSB supplementation exhibited the daily average specific biogas and methane yield of 368.6 L/kg volatile solids (VS) and 230 L/kg VS, which were 35% and 37% higher than the control. Principle component analysis indicated that the VS reduction positively correlated with the daily average specific biogas and methane yield. Metagenomic analysis revealed that the CSB supplementation facilitated microbial colonization with the enrichment of unclassified genera from families Planococcaceae, Clostridiaceae, and Ruminococcaceae, and genus Clostridium and methanogenic archaea (Methanosarcina and Methanobacterium). The co-occurrence network revealed a notable shift in microbial interactions following the supplementation of CSB as an additive in AD. These results offer insights for enhancing the performance of the AD using CSB.

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研究玉米秸秆生物炭补充对连续中试规模厌氧消化的作用：性能和微生物群落动态

在厌氧消化（AD）过程中，补充生物炭可以促进微生物定植，增加沼气和甲烷产量。本研究调查了玉米秸秆生物炭（CSB）添加对稻草连续中试规模厌氧消化的影响。添加 CSB 后，日均特定沼气和甲烷产量分别为 368.6 升/千克挥发性固体（VS）和 230 升/千克 VS，比对照组分别高出 35% 和 37%。主成分分析表明，VS 的减少与日均特定沼气和甲烷产量呈正相关。元基因组分析表明，补充 CSB 促进了微生物的定植，富集了 Planococcaceae、Clostridiaceae 和 Ruminococcaceae 科的未分类菌属，以及梭菌属和产甲烷古细菌（Methanosarcina 和 Methanobacterium）。共现网络显示，在添加 CSB 作为添加剂后，微生物之间的相互作用发生了显著变化。这些结果为利用 CSB 提高厌氧消化工艺的性能提供了启示。

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.