A review of microbial responses to biochar addition in anaerobic digestion system: Community, cellular and genetic level findings

Zhao, Weixin; Hu, Tianyi; Ma, Hao; Li, Dan; Zhao, Qingliang; Jiang, Junqiu; Wei, Liangliang

doi:10.1016/j.biortech.2023.129929

Bioresource Technology

2024

DOI: 10.1016/j.biortech.2023.129929

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A review of microbial responses to biochar addition in anaerobic digestion system: Community, cellular and genetic level findings

Weixin Zhao,

Tianyi Hu,

Hao Ma

et al.

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2024

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Cited by 11 publications

References 141 publications

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Enhanced methane production from protein and lipid‐rich wastewater using powdered oat husk‐biochar

Pagés‐Díaz,

Vidal,

Huiliñir

et al. 2024

J of Chemical Tech & Biotech

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BACKGROUNDDue to the lower degradation and the potential inhibitory compounds present in slaughterhouse wastewater (SW), its industrial applications are often limited to methane production. This study investigated the combined effect of conductive material such as oat husk‐biochar at different concentrations (0, 5, 10, 15, 20, 25 g L−1) and particle sizes (i.e., Powder Biochar (PB) (0.05–0.08 mm) vs. Granular Biochar (GB) (0.8–1.0 mm)) in the methane production, biodegradability, kinetic parameters, methanogenic activity and digestate quality of SW, using a multilevel factorial design.RESULTSExperimental results showed that lower concentration (5, 10 g L−1) increased the methane yield up to 35% for PB and between 11 and 13% for GB compared to the control reactor. The total ammoniacal nitrogen concentrations in the digestate declined between 14% and 52% for all biochar dosages and particle sizes. PB improved the specific methanogenic activity of the biomass compared with GB, indicating that PB can support a well‐balanced methanogenic community compared with GB inside the digester. The multiple response optimization process computed that 7.5 g L−1 of PB is optimal to increase the methane yield, the COD degradation efficiency and shorten the lag phase. On the other hand, doses higher than 15 g L−1 hinder methane generation.CONCLUSIONSPB supplementation has significant potential to improve the anaerobic degradation of SW. The improvement is attributed to the higher specific surface area, contributing to better support and microbial activity. © 2024 Society of Chemical Industry (SCI).

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Enhanced methane production from protein and lipid‐rich wastewater using powdered oat husk‐biochar

Pagés‐Díaz,

Vidal,

Huiliñir

et al. 2024

J of Chemical Tech & Biotech

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Stress resistance enhancing with biochar application and promotion on crop growth

Chi,

Nan,

Liu

et al. 2024

Biochar

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Environmental stressors such as drought, salinity, and heavy metals pose significant obstacles to achieving sustainable food security, necessitating the development of universally applicable and cost-effective solutions to ameliorate soil under stress. Biochar, an eco-friendly material to increase crop yield, has been researched for almost two decades and has great potential for global use in enhancing stress resistance. However, there hasn't been comprehensive research on the impact of biochar application on soil properties, and root and crop growth. To optimize and promote biochar application in agriculture under stress, this study integrates over 100 peer-reviewed articles to explain how biochar promotes crop growth by enhancing soil resistance to stress. Biochar's distinctive properties, such as porous structure, alkaline nature, enriched surface functional groups, and nutrient content, are responsible for the following soil environment benefits: improved soil physiochemical properties, increased nutrient cycling, and boosted microbial growth. Moreover, the research emphasizes that the enhanced stress resistance of biochar optimizes nutrient absorption, alleviates soil pollutants, and thereby enhances overall crop productivity. The study discusses the roles and mechanisms of biochar on soil under stress, as well as the challenges linked to the sustainable and economical implementation of biochar in extreme soil conditions. This review aims to provide a theoretical basis for the widespread and cost-effective use of biochar in improving soil under stresses, thereby enhancing soil health and food security. Graphical Abstract

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Enhancing microbial viability with biochar for increased methane production during the anaerobic digestion of chicken manure

Ngo,

Khudur,

Hassan

et al. 2024

Fuel

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A review of microbial responses to biochar addition in anaerobic digestion system: Community, cellular and genetic level findings

Cited by 11 publications

References 141 publications

Enhanced methane production from protein and lipid‐rich wastewater using powdered oat husk‐biochar

Enhanced methane production from protein and lipid‐rich wastewater using powdered oat husk‐biochar

Stress resistance enhancing with biochar application and promotion on crop growth

Enhancing microbial viability with biochar for increased methane production during the anaerobic digestion of chicken manure

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