Mitigation of acidogenic product inhibition and elevated mass transfer by biochar during anaerobic digestion of food waste

Zhao, Danyang; Yan, Binghua; Liu, Chao; Yao, Bin; Luo, Lin; Yang, Yang; Li-chao, Liu; Wu, Fan; Zhou, Yaoyu

doi:10.1016/j.biortech.2021.125531

Cited by 72 publications

(17 citation statements)

References 107 publications

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“…Bacteroidetes , Chloroflexi , Synergistetes , and Planctomycetes have all recently been promoted in biochar-added bioreactors (Chen et al 2021a ). Additionally, biochar supplementation can abate the inhibition of acidogenic by-products by increasing syntrophic oxidation of volatile fatty acids (Zhao et al 2021c ). In addition to acidified bacterial enrichment, the porous characteristics of biochar also facilitate the growth of methanogens such as Methanosaeta , Methanobacterium , Methanosarcina , and Methanolinea (Kumar et al 2021c ; Chen et al 2021a ).…”

Section: Anaerobic Digestionmentioning

confidence: 99%

Biochar for agronomy, animal farming, anaerobic digestion, composting, water treatment, soil remediation, construction, energy storage, and carbon sequestration: a review

et al. 2022

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In the context of climate change and the circular economy, biochar has recently found many applications in various sectors as a versatile and recycled material. Here, we review application of biochar-based for carbon sink, covering agronomy, animal farming, anaerobic digestion, composting, environmental remediation, construction, and energy storage. The ultimate storage reservoirs for biochar are soils, civil infrastructure, and landfills. Biochar-based fertilisers, which combine traditional fertilisers with biochar as a nutrient carrier, are promising in agronomy. The use of biochar as a feed additive for animals shows benefits in terms of animal growth, gut microbiota, reduced enteric methane production, egg yield, and endo-toxicant mitigation. Biochar enhances anaerobic digestion operations, primarily for biogas generation and upgrading, performance and sustainability, and the mitigation of inhibitory impurities. In composts, biochar controls the release of greenhouse gases and enhances microbial activity. Co-composted biochar improves soil properties and enhances crop productivity. Pristine and engineered biochar can also be employed for water and soil remediation to remove pollutants. In construction, biochar can be added to cement or asphalt, thus conferring structural and functional advantages. Incorporating biochar in biocomposites improves insulation, electromagnetic radiation protection and moisture control. Finally, synthesising biochar-based materials for energy storage applications requires additional functionalisation.

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Section: Anaerobic Digestionmentioning

confidence: 99%

Biochar for agronomy, animal farming, anaerobic digestion, composting, water treatment, soil remediation, construction, energy storage, and carbon sequestration: a review

et al. 2022

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“…Under acid stress, porous biochar is able to support the development of biofilm as well as protect selectively enriched functional microorganisms which are tightly associated with it (Chiappero et al, 2020). Furthermore, the addition of biochar can accelerate the syntrophic oxidation of VFA, mitigating the effects of acidogenic product inhibition (D. Zhao et al, 2021a). The porous characteristic and large specific surface area of biochar could promote the bacteria and archaea colonization, leading to an improvement in AD performance (Kumar et al, 2021).…”

Section: Improving Biogas Productionmentioning

confidence: 99%

Production of biochar from crop residues and its application for anaerobic digestion

Hoang

Goldfarb

Foley

et al. 2022

Bioresource Technology

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“…As a sustainable technology, anaerobic digestion can effectively reduce the volume of food waste, stabilize organics, and eliminate pathogens . In addition, anaerobic digestion is considered to have the potential to reduce the risk of transmission of antibiotic resistance genes (ARGs) in food waste. , However, anaerobic digestion of food waste easily encounters technical issues such as the accumulation of volatile fatty acids (VFAs) and ammonia inhibition owing to the unbalanced C/N ratio and trace metal deficiency of food waste. − Among the four stages of anaerobic digestion (i.e., hydrolysis, acidogenesis, acetogenesis, and methanogenesis), hydrolysis is the main rate-limiting step while methanogensis is the decisive step that is directly related to final methane production and sensitive to adverse factors such as temperature, pH, and toxicants. − Researchers have devised a number of physical, chemical, and biological techniques to accelerate hydrolysis and optimize the methanogensis to increase the production of methane from food waste. − However, most of them mainly focused on improving the biotransformations of proteins, polysaccharide, and lipids in food waste. − None of the previous reviews addressed the interaction between anaerobic digestion and food additives that often accumulate in large quantities in food waste, mainly including salt, capsaicin, allicin, allyl isothiocyanate (AITC), monosodium glutamate (MSG), and nonnutritive sweeteners (NNS). − This situation hides the details of what is happening in the anaerobic digestion of food waste in the real world, which is not conducive to the deep control and regulation of the anaerobic digestion system.…”

Section: Introductionmentioning

confidence: 99%

Insights into the Occurrence, Fate, Impacts, and Control of Food Additives in Food Waste Anaerobic Digestion: A Review

Long

Liu

et al. 2023

Environ. Sci. Technol.

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The recovery of biomass energy from food waste through anaerobic digestion as an alternative to fossil energy is of great significance for the development of environmental sustainability and the circular economy. However, a substantial number of food additives (e.g., salt, allicin, capsaicin, allyl isothiocyanate, monosodium glutamate, and nonnutritive sweeteners) are present in food waste, and their interactions with anaerobic digestion might affect energy recovery, which is typically overlooked. This work describes the current understanding of the occurrence and fate of food additives in anaerobic digestion of food waste. The biotransformation pathways of food additives during anaerobic digestion are well discussed. In addition, important discoveries in the effects and underlying mechanisms of food additives on anaerobic digestion are reviewed. The results showed that most of the food additives had negative effects on anaerobic digestion by deactivating functional enzymes, thus inhibiting methane production. By reviewing the response of microbial communities to food additives, we can further improve our understanding of the impact of food additives on anaerobic digestion. Intriguingly, the possibility that food additives may promote the spread of antibiotic resistance genes, and thus threaten ecology and public health, is highlighted. Furthermore, strategies for mitigating the effects of food additives on anaerobic digestion are outlined in terms of optimal operation conditions, effectiveness, and reaction mechanisms, among which chemical methods have been widely used and are effective in promoting the degradation of food additives and increasing methane production. This review aims to advance our understanding of the fate and impact of food additives in anaerobic digestion and to spark novel research ideas for optimizing anaerobic digestion of organic solid waste.

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Mitigation of acidogenic product inhibition and elevated mass transfer by biochar during anaerobic digestion of food waste

Cited by 72 publications

References 107 publications

Biochar for agronomy, animal farming, anaerobic digestion, composting, water treatment, soil remediation, construction, energy storage, and carbon sequestration: a review

Biochar for agronomy, animal farming, anaerobic digestion, composting, water treatment, soil remediation, construction, energy storage, and carbon sequestration: a review

Production of biochar from crop residues and its application for anaerobic digestion

Insights into the Occurrence, Fate, Impacts, and Control of Food Additives in Food Waste Anaerobic Digestion: A Review

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