Inhibition insights of hydrothermal liquid digestate in anaerobic digestion: Impact on organics conversion and inhibitor degradation

Shao, Mingshuai; Zhang, Chao; Cui, Guangyu; Bai, Xinyue; Wang, Ning; Wang, Xue; Chen, Qindong; Xu, Qiyong

doi:10.1016/j.jhazmat.2023.132221

Cited by 7 publications

(2 citation statements)

References 53 publications

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“…In addition to organic acids and TAN, toxic organic compounds in the process water may limit energy recovery from AD due to inhibition (Shao et al 2023 ). The toxic organic compounds in process water include aldehydes, phenols, alcohols, pyridine, and their derivatives (Li et al 2019 ).…”

Section: Toxicity Of Process Water To Anaerobic Microbesmentioning

confidence: 99%

“…They comprise one or more hydroxyl groups attached to an aromatic benzene ring. N-heterocyclic compounds (pyridines, pyrroles) are another known inhibitor in process water, causing cellular disruption via non-specific enzymatic protein reactions (Shao et al 2023 ). This class of compounds is characterized by heterocyclic rings where N constitutes the heteroatom.…”

Section: Toxicity Of Process Water To Anaerobic Microbesmentioning

confidence: 99%

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Anaerobic digestion of process water from hydrothermal treatment processes: a review of inhibitors and detoxification approaches

Zhou,

Taiwo,

Wang

et al. 2024

Bioresour. Bioprocess.

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Integrating hydrothermal treatment processes and anaerobic digestion (AD) is promising for maximizing resource recovery from biomass and organic waste. The process water generated during hydrothermal treatment contains high concentrations of organic matter, which can be converted into biogas using AD. However, process water also contains various compounds that inhibit the AD process. Fingerprinting these inhibitors and identifying suitable mitigation strategies and detoxification methods is necessary to optimize the integration of these two technologies. By examining the existing literature, we were able to: (1) compare the methane yields and organics removal efficiency during AD of various hydrothermal treatment process water; (2) catalog the main AD inhibitors found in hydrothermal treatment process water; (3) identify recalcitrant components limiting AD performance; and (4) evaluate approaches to detoxify specific inhibitors and degrade recalcitrant components. Common inhibitors in process water are organic acids (at high concentrations), total ammonia nitrogen (TAN), oxygenated organics, and N-heterocyclic compounds. Feedstock composition is the primary determinant of organic acid and TAN formation (carbohydrates-rich and protein-rich feedstocks, respectively). In contrast, processing conditions (e.g., temperature, pressure, reaction duration) influence the formation extent of oxygenated organics and N-heterocyclic compounds. Struvite precipitation and zeolite adsorption are the most widely used approaches to eliminate TAN inhibition. In contrast, powdered and granular activated carbon and ozonation are the preferred methods to remove toxic substances before AD treatment. Currently, ozonation is the most effective approach to reduce the toxicity and recalcitrance of N and O-heterocyclic compounds during AD. Microaeration methods, which disrupt the AD microbiome less than ozone, might be more practical for nitrifying TAN and degrading recalcitrant compounds, but further research in this area is necessary. Graphical Abstract

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Section: Toxicity Of Process Water To Anaerobic Microbesmentioning

confidence: 99%

Section: Toxicity Of Process Water To Anaerobic Microbesmentioning

confidence: 99%