Effect of bamboo hydrochar on anaerobic digestion of fish processing waste for biogas production

Choe, Ungyong; Mustafa, Ahmed M.; Lin, Hongjian; Xu, Jie; Sheng, Kuichuan

doi:10.1016/j.biortech.2019.03.084

Cited by 52 publications

(12 citation statements)

References 27 publications

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“…The biodegradability of Char-150, Char-200, and Char-250 was 50%, 39%, and 7%, respectively; suggesting an increasingly recalcitrant structure with increased HTC temperature. Therefore, recent work has identified the use of hydrochar as an additive to AD, to facilitate and enhance the digestion properties of feedstocks such as fish processing waste [79] and pig carcass [80]; rather than the use of hydrochar directly as an AD feedstock. However, this has not yet been explored for WH.…”

Section: Hydrocharsmentioning

confidence: 99%

An Assessment of Different Integration Strategies of Hydrothermal Carbonisation and Anaerobic Digestion of Water Hyacinth

et al. 2020

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Water hyacinth (WH) is an invasive aquatic macrophyte that dominates freshwater bodies across the world. However, due to its rapid growth rate and wide-spread global presence, WH could offer great potential as a biomass feedstock, including for bioenergy generation. This study compares different integration strategies of hydrothermal carbonisation (HTC) and anaerobic digestion (AD) using WH, across a range of temperatures. These include (i) hydrochar combustion and process water digestion, (ii) hydrochar digestion, (iii) slurry digestion. HTC reactions were conducted at 150 °C, 200 °C, and 250 °C. Separation of hydrochars for combustion and process waters for digestion offers the most energetically-feasible valorisation route. However, hydrochars produced from WH display slagging and fouling tendencies; limiting their use in large-scale combustion. AD of WH slurry produced at 150 °C appears to be energetically-feasible and has the potential to also be a viable integration strategy between HTC and AD, using WH.

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Section: Hydrocharsmentioning

confidence: 99%

An Assessment of Different Integration Strategies of Hydrothermal Carbonisation and Anaerobic Digestion of Water Hyacinth

et al. 2020

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“…Biochar properties are affected by many preparation factors. For instance, increasing the pyrolysis temperature during BC preparation can sharply decrease the amount of volatile solids (Luz, Cordiner, Manni, Mulone, Rocco, Braglia, et al, 2018), and the nature of raw materials such as animal manure and tree branches can directly affect the BC pore characteristics (Choe et al, 2019; Pan, Ma, Liu, et al, 2019). The modification of BC can eliminate elements in the alkyl, aromatic, ester, and hydroxyl groups, thereby forming vacancies (Ayaz et al, 2021), which significantly increase their BET‐specific surface area.…”

Section: Discussionmentioning

confidence: 99%

Magnetic biochar affects the metabolic pathway in methanogenesis of anaerobic digestion of food waste

Gao

Zhi

et al. 2022

GCB Bioenergy

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To alleviate pollution and promote clean energy production, food waste can be used to produce methane through anaerobic digestion (AD). In this study, wheat straw was used to produce biochar (BC) and magnetic biochar (MB) as additives for AD of food waste. MB2.5% and BC2.5% led to the highest methane production. The main action mechanism of the additives in AD was the change in environmental factors upon stimulating microorganisms to rapidly metabolize volatile fatty acids. The stimulation of microbial function increased the abundance of the methanogenesis pathways. Methanosarcina was the most dominant archaea in the four methanogenesis modules, and the microbial community changed more clearly with time than with treatment. This study is innovative in finding the effectiveness of BC and MB treatments attributed to the abundance of methanogenesis modules, especially MB2.5% treatment retained its advantage until the later stage of digestion in AD process.

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“…For example, hydrochar promotes electron transfer reactions because of the presence of surface functional groups, improves the buffer capacity of the system by providing an alkaline environment, and supports microbial proliferation through the porous structure (Fagbohungbe et al, 2017;Usman et al, 2020). Previous reports have indicated that biogas yield increased in 64 and 52% by hydrochar addition during the digestion of fish processing waste and hydrothermal liquefaction wastewater, respectively (Choe et al, 2019;Usman et al, 2020). As shown in Figure 1, the functional groups (-OH and C=O) present in the inoculated sludge increased after hydrochar addition.…”

Section: The Role Of Hydrochar On Improving Biogas Productionmentioning

confidence: 99%

“…Also, under alkaline conditions, different groups containing carbon (C≡C, C=O, and C−O) may promote the release of protons (Fagbohungbe et al, 2017). In addition, the porous structure and alkaline environment of hydrochar supports microbial proliferation and enhances buffer capacity, respectively (Choe et al, 2019;Usman et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Effects of Hydrothermal Pretreatment and Hydrochar Addition on the Performance of Pig Carcass Anaerobic Digestion

Lin

Sheng

2021

Front. Microbiol.

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Proper disposal and utilization of dead pig carcasses are problems of public concern. The combination of hydrothermal pretreatment (HTP) and anaerobic digestion is a promising method to treat these wastes, provided that digestion inhibition is reduced. For this reason, the aim of this work was to investigate the optimal HTP temperature (140–180°C) for biogas production during anaerobic digestion of dead pigs in batch systems. In addition, the effects of hydrochar addition (6 g/L) on anaerobic digestion of pork products after HTP in continuous stirred tank reactors (CSTR) were determined. According to the results, 90% of lipids and 10% of proteins present in the pork were decomposed by HTP. In addition, the highest chemical oxygen demand (COD) concentration in liquid products (LP) reached 192.6 g/L, and it was obtained after 170°C HTP. The biogas potential from the solid residue (SR) and LP was up to 478 mL/g-VS and 398 mL/g-COD, respectively. A temperature of 170°C was suitable for pork HTP, which promoted the practical biogas yield because of the synergistic effect between proteins and lipids. Ammonia inhibition was reduced by the addition of hydrochar to the CSTR during co-digestion of SR and LP, maximum ammonia concentration tolerated by methanogens increased from 2.68 to 3.38 g/L. This improved total biogas yield and degradation rate of substrates, reaching values of 28.62 and 36.06%, respectively. The acetate content in volatile fatty acids (VFA) may be used as an index that reflects the degree of methanogenesis of the system. The results of the present work may also provide guidance for the digestion of feedstock with high protein and lipid content.

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Effect of bamboo hydrochar on anaerobic digestion of fish processing waste for biogas production

Cited by 52 publications

References 27 publications

An Assessment of Different Integration Strategies of Hydrothermal Carbonisation and Anaerobic Digestion of Water Hyacinth

An Assessment of Different Integration Strategies of Hydrothermal Carbonisation and Anaerobic Digestion of Water Hyacinth

Magnetic biochar affects the metabolic pathway in methanogenesis of anaerobic digestion of food waste

Effects of Hydrothermal Pretreatment and Hydrochar Addition on the Performance of Pig Carcass Anaerobic Digestion

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