Valorization of hydrothermal carbonization products by anaerobic digestion: Inhibitor identification, biomethanization potential and process intensification

Zhu, Kongyun; Liu, Qiutong; Dang, Chao; Li, Aimin; Zhang, Lei

doi:10.1016/j.biortech.2021.125752

Cited by 10 publications

(12 citation statements)

References 36 publications

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“…Indeed, when aqueous products obtained from HTC performed at 240 • C were supplemented by carbonaceous material, methane yields increased by 1.3-fold and 1.8-fold, respectively. These finding could provide some valuable technical information for HTC-based biorefinery systems applied to organic waste [35].…”

Section: Introductionmentioning

confidence: 74%

“…The integration of hydrothermal carbonization and anaerobic digestion for the biorefineryoriented full utilization of wet organic wastes is a promising, emerging technological option. However, the high temperature of the hydrothermal carbonization process (240 • C) increases the yield of substances that inhibit the process of anaerobic digestion [35,36]. The yield of methane can be increased 1.3-1.8-fold if the liquid fraction obtained as a result of hydrothermal carbonization is further treated or supplemented with a carbon-containing substance [35].…”

Section: Introductionmentioning

confidence: 99%

“…However, the high temperature of the hydrothermal carbonization process (240 • C) increases the yield of substances that inhibit the process of anaerobic digestion [35,36]. The yield of methane can be increased 1.3-1.8-fold if the liquid fraction obtained as a result of hydrothermal carbonization is further treated or supplemented with a carbon-containing substance [35]. Indeed, when aqueous products obtained from HTC performed at 240 • C were supplemented by carbonaceous material, methane yields increased by 1.3-fold and 1.8-fold, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Characteristics of Poultry Litter Pellets Obtained by the Processes of Dry and Wet Torrefaction

et al. 2022

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Torrefaction is a technology for the preliminary thermochemical treatment of biomass in order to improve its fuel characteristics. The aim of this work is to conduct comparative studies and select the optimal operating conditions of fluidized bed torrefaction for the processing of poultry litter (PL) into an environmentally friendly fuel. PL torrefaction was evaluated according to three different process configurations: (1) torrefaction of PL pellets in a fixed bed in a nitrogen medium at temperatures of 250 °C, 300 °C and 350 °C (NT1, NT2 and NT3); (2) torrefaction of PL pellets in a fluidized bed of quartz sand in a nitrogen medium at temperatures of 250 °C, 300 °C and 350 °C (NT4, NT5 and NT6); and (3) torrefaction of PL pellets in a fluidized bed of quartz sand in an environment of superheated steam at temperatures of 250 °C, 300 °C and 350 °C (ST1, ST2 and ST3). The duration of the torrefaction process in all experiments was determined by the time required for completion of CO2, CO, H2, and CH4 release from the treated biomass samples. The gas analyzer (Vario Plus Syngaz) was used to measure the concentration of these gases. The torrefaction process began from the moment of loading the PL sample into the reactor, which was heated to the required temperature. After the start of the torrefaction process, the concentration of CO2, CO, H2, and CH4 in the gases leaving the reactor initially increased and, subsequently, dropped sharply, indicating the completion of the torrefaction process. The chemical composition of the obtained biochar was studied, and it was found that the biochar contained approximately equal amounts of oxygen, carbon, nitrogen, hydrogen and ash, regardless of the torrefaction method. Furthermore, the biogas yield of the liquid condensate, obtained from the cooling of superheated steam used in the torrefaction process, was evaluated. The results highlight the efficiency of fluidized bed torrefaction, as well as the performance of superheated steam as a fluidization medium.

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Section: Introductionmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparison of Characteristics of Poultry Litter Pellets Obtained by the Processes of Dry and Wet Torrefaction

et al. 2022

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“…The CH 4 yields from algal biomass averaged 189 ml CH 4 /g COD, with a 50% probability distribution within 138–230 mL CH 4 /g COD (Brown et al 2020b ; Li et al 2019 ; Shanmugam et al 2017 ; Tommaso et al 2015 ; Yang et al 2018 ; Yu et al 2020 ; Zheng et al 2017 ). Process water from sewage sludge and digestate resulted in lower CH 4 yields: 167 mL CH 4 /g COD, with a 50% probability distribution within 144–183 mL CH 4 /g COD (Chen et al 2019 ; De la Rubia et al 2018 ; Gaur et al 2020 ; Hao et al 2020 ; Usman et al 2019 ; Villamil et al 2018 ; Wirth et al 2015 ), and 173 mL CH 4 /g COD, with a 50% probability distribution within 114–225 mL CH 4 /g COD (Ahmed et al 2021 ; Ipiales et al 2021 ; Parmar and Ross 2019 ; Zhu et al 2021 ). The average CH 4 yields from process water differed depending on their source type; however, these differences may not be statistically significant, given the high variation observed between studies.…”

Section: Anaerobic Biodegradability Of Process Watermentioning

confidence: 99%

“…CH 4 yields of process water decreased with increasing hydrothermal treatment severity from 4.28 (treatment conditions: 175 ℃ for 120 min) to 7.97 (treatment conditions: 320 ℃ for 120 min) (Fig. 1 c), according to the data collected from previous studies (Ahmed et al 2021 ; Brown et al 2020a ; Chen et al 2019 , 2017 ; De la Rubia et al 2018 ; Dias et al 2021 ; Erdogan et al 2015 ; Gaur et al 2020 ; Hao et al 2020 ; Ipiales et al 2021 ; Li et al 2019 ; Mannarino et al 2022 ; Marin-Batista et al 2020 ; Parmar and Ross 2019 ; Shanmugam et al 2017 ; Si et al 2018 , 2019 ; Tommaso et al 2015 ; Usman et al 2020 ; Villamil et al 2018 ; Wang et al 2020 ; Wirth and Mumme 2013 ; Wirth et al 2015 ; Xiang et al 2021 ; Yang et al 2018 ; Yu et al 2020 ; Zheng et al 2017 ; Zhou et al 2015 ; Zhu et al 2021 ). A recent study also observed a negative correlation between reaction temperature and CH 4 yields (Ma et al 2024 ).…”

Section: Anaerobic Biodegradability Of Process Watermentioning

confidence: 99%

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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Evaluation and optimization of hydrothermal carbonization condition for hydrochar and methane yield from anaerobic digestion of organic fraction of municipal solid waste (OFMSW)

Abdoli,

Ghasemzadeh

2024

Fuel

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Valorization of hydrothermal carbonization products by anaerobic digestion: Inhibitor identification, biomethanization potential and process intensification

Cited by 10 publications

References 36 publications

Comparison of Characteristics of Poultry Litter Pellets Obtained by the Processes of Dry and Wet Torrefaction

Comparison of Characteristics of Poultry Litter Pellets Obtained by the Processes of Dry and Wet Torrefaction

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

Evaluation and optimization of hydrothermal carbonization condition for hydrochar and methane yield from anaerobic digestion of organic fraction of municipal solid waste (OFMSW)

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