Recalcitrant compounds formation, their toxicity, and mitigation: Key issues in biomass pretreatment and anaerobic digestion

Balasundaram, Gowtham; Banu, Rajesh; Varjani, Sunita; Kazmi, A.A.; Tyagi, Vinay Kumar

doi:10.1016/j.chemosphere.2021.132930

Cited by 36 publications

(13 citation statements)

References 81 publications

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“…Inhibitors formed during pretreatment have been classified based on their chemical functional groups or chemical properties. The significant inhibitors produced during pretreatment are phenolic acids and furans 110 …”

Section: Considerations For Implementing Pretreatment Of Dcmmentioning

confidence: 99%

“…During the degradation of hemicellulose, xylose, mannose, galactose, acetic acid, and glucose are released. Under elevated temperatures and pressures, xylose and hexose are degraded into furfural and HMF, further degrading and forming levulinic acid 110 . Furan derivatives are produced during acidic and thermal pretreatments.…”

Section: Considerations For Implementing Pretreatment Of Dcmmentioning

confidence: 99%

“…The significant inhibitors produced during pretreatment are phenolic acids and furans. 110 In a study by Kim and Karthikeyan, 60 the pretreatment of DCM produced furans. However, the highest concentration of furan (furfural and HMF) was observed with acid pretreatment.…”

Section: Technical Challengesmentioning

confidence: 99%

“…Under elevated temperatures and pressures, xylose and hexose are degraded into furfural and HMF, further degrading and forming levulinic acid. 110 Furan derivatives are produced during acidic and thermal pretreatments. A study by Tan et al 111 revealed that a higher HMF concentration results in a lower AD rate and methane yield, thus increasing the digestion period.…”

Section: Technical Challengesmentioning

confidence: 99%

“…113 Phenolic acids produced when lignin is partially degraded during physio-chemical pretreatment impede the growth of microorganisms. Balasundaram et al 110 stated that phenolic compounds can cause the breakdown of DNA, inhibiting the RNA and the synthesis of proteins. The percentage of hemicellulose and lignin has been reported to be around 28% and 16%, respectively, in DCM.…”

Section: Technical Challengesmentioning

confidence: 99%

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Prospective of pretreatment and anaerobic digestion of dairy cow manure in Fiji

Nadan

Baroutian

2023

J of Chemical Tech & Biotech

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The continuing increase in dairy cattle farming poses a significant threat to the environment due to the release of greenhouse gases (GHG) from uncontrolled manure generation. Waste valorisation of dairy cow manure (DCM) through anaerobic digestion (AD) provides an avenue for simultaneously managing DCM and mitigating climate change through renewable energy. This review provides an overview of DCM production and the potential use of the AD processes for waste management and renewable energy generation in Fiji. Fiji dairy farms are geographically unevenly distributed and have considerably small herd sizes. With pretreatment techniques, biogas production from DCM at these farms has the potential to be optimised, economically feasible, and viable. Biogas production from DCM can be enhanced by approximately 125% with pretreatment techniques. Hence, this study reviews various pretreatment methods, their economic and environmental benefits, and AD's general challenges and limitations. This research reveals a need for further investigation into the optimisation of biogas and bio-methane potential of DCM, specifically with the economic viability and the environmental considerations of implementing these techniques at Fijian dairy farms.

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Section: Considerations For Implementing Pretreatment Of Dcmmentioning

confidence: 99%

Section: Considerations For Implementing Pretreatment Of Dcmmentioning

confidence: 99%

Section: Technical Challengesmentioning

confidence: 99%

Section: Technical Challengesmentioning

confidence: 99%

Section: Technical Challengesmentioning

confidence: 99%

See 3 more Smart Citations

Prospective of pretreatment and anaerobic digestion of dairy cow manure in Fiji

Nadan

Baroutian

2023

J of Chemical Tech & Biotech

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Recent advances, perspectives and challenges on levulinic acid production from residual biomass

Bazoti

Bonatto

Scapini

et al. 2023

Biofuels Bioprod Bioref

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Over the years, several studies have focused on integrally exploring lignocellulosic biomass to achieve satisfactory yields of different bioproducts and establish economically viable industrial processes. Among the bioproducts, levulinic acid (LA) has emerged as one of the top platform products derived from biomass, mainly owing to its expanding market economic position, which can stimulate viability and attract the attention of investors in the field. Considered a building block because of its versatile intermediate chemical structure, it can be used to synthesize many compounds with applications in fuels, pharmaceutical and cosmetics industries, food additives and solvents. The main synthesis route for obtaining LA is the degradation of cellulose via acid catalysis. In this context, lignocellulosic biomass is a promising and sustainable way of getting LA. Recent research has explored a potential path to full technological development associated with LA from various biomass and different catalysts. In this scenario, a comprehensive review concerning biomass for LA production and the challenges in the synthesis process is proposed. The primary studies conducted over the years and approaches to using and appreciating residual biomass are also discussed. This work also considers the use of technological tools to optimize the production of LA and seeks to contribute sustainable proposals still little explored, such as the intensification of the process and the use of fruit residues in the synthesis of this promising building block.

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Digesters as heat storage: Effects of the digester temperature on the process stability, sludge liquor quality, and the dewaterability

Steiniger

Hubert

Schaum

2023

Water Environment Research

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Variation of the digester temperature during the year enables the operation of digesters as seasonal heat storage contributing to a holistic heat management at water resource recovery facilities. Full‐ and lab‐scale process data were conducted to examine the effect of the digester temperature on process stability, sludge liquor quality and the dewaterability. Both full‐ and lab‐scale digesters show a stable anaerobic degradation process with a hydraulic retention time of more than 20 days and organic load rates up to 2.2 kg COD/(m3·d) at temperatures between 33 and 53 °C. The concentrations of soluble COD and ammonium‐nitrogen in the sludge liquor digested at 53 °C are 2.6‐ to 5.8‐ times and 1.3‐times higher, respectively, than in the sludge liquor digested at 37 °C. Dewatering tests show an enhancement of the dewaterability but a clear increase in the polymer demand at increased digester temperature.

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Recalcitrant compounds formation, their toxicity, and mitigation: Key issues in biomass pretreatment and anaerobic digestion

Cited by 36 publications

References 81 publications

Prospective of pretreatment and anaerobic digestion of dairy cow manure in Fiji

Prospective of pretreatment and anaerobic digestion of dairy cow manure in Fiji

Recent advances, perspectives and challenges on levulinic acid production from residual biomass

Digesters as heat storage: Effects of the digester temperature on the process stability, sludge liquor quality, and the dewaterability

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