Pretreatment of agricultural biomass for anaerobic digestion: Current state and challenges

Paudel, Shukra Raj; Banjara, Sushant Prasad; Choi, Oh Kyung; Park, Ki Young; Kim, Young Beom; Lee, Jae Woo

doi:10.1016/j.biortech.2017.08.182

Cited by 295 publications

(122 citation statements)

References 113 publications

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“…In the case of chemical pretreatment, cost of reagents, and operation such as the extra step for neutralization and the requirement for corrosion resistant reactors are the known limitations [178]. Additionally, the formation of inhibitory compounds is a point to be considered since it can inhibit or significantly reduce the conversion efficiency of hydrolyzates of lignocellulosic biomass to methane.…”

Section: Limitationsmentioning

confidence: 99%

Insight into Pretreatment Methods of Lignocellulosic Biomass to Increase Biogas Yield: Current State, Challenges, and Opportunities

et al. 2019

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Lignocellulosic biomass is recalcitrant due to its heterogeneous structure, which is one of the major limitations for its use as a feedstock for methane production. Although different pretreatment methods are being used, intermediaries formed are known to show adverse effect on microorganisms involved in methane formation. This review, apart from highlighting the efficiency and limitations of the different pretreatment methods from engineering, chemical, and biochemical point of views, will discuss the strategies to increase the carbon recovery in the form of methane by way of amending pretreatments to lower inhibitory effects on microbial groups and by optimizing process conditions.

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Section: Limitationsmentioning

confidence: 99%

Insight into Pretreatment Methods of Lignocellulosic Biomass to Increase Biogas Yield: Current State, Challenges, and Opportunities

et al. 2019

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“…This fermentation process is usually hindered by various factors related to the nature of the substrate, such as nutrient balance, pH, or the presence of toxins and inhibitors [5]. The organic matter that can be used in the anaerobic digestion process is diverse [6]. Studies have reported various solid wastes being used, such as waste sludge from water treatment plants, agricultural livestock waste, and lignocellulosic waste [7].…”

Section: Introductionmentioning

confidence: 99%

Improvement of Anaerobic Digestion of Hydrolysed Corncob Waste by Organosolv Pretreatment for Biogas Production

et al. 2020

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This paper describes an organosolv pretreatment of corncob waste to improve its anaerobic digestion for biogas production. Through a thermochemical process based on the use of ethanol and acetic acid, it was possible to separate the fractions of lignin, considered to be a natural inhibitor of anaerobic digestion processes. In addition, with this organosolv pretreatment, the available sugars in the carbohydrates present as monosaccharides, or simple sugars, were depolymerised, facilitating the digestion process. The obtained results include the chemical characterisation of the corncob, the hydrolysate, and the mixture with cow manure, finding that these substrates have potential to be used in anaerobic digestion. The total reducing sugars consumed were 96.8%, and total sugars were 85.75%. It was clearly observed that with the use of pretreatment with organosolv, the production of biogas was superior, because 484 NmL/gVS was obtained compared to the other reported treatments. It was also observed that adding the hydrolysate organosolv increased the production because the values of the control without hydrolysate were 120 NmL/gVS in the bottle experiment. When the experiment was scaled to the 5L reactor, the total volumes of biogas that were accumulated in 15 days of production were 5050 NmL/gVS and 1212 NmL/gVS with and without hydrolysate, respectively. This indicates that the organosolv pretreatment of corncob waste is effective in improving biogas production.

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“…This has been subject of increasing research investigating numerous different techniques such as mechanical, chemical, thermal and biological processes (e.g. Hendriks & Zeeman, 2009;Zheng et al, 2014;Carrere et al, 2016;Paudel et al, 2017). However, the key issue is on assessing the real benefit of pretreatment in real conditions.…”

Section: Introductionmentioning

confidence: 99%

“…According to EBA data (EBA, 2018) on electric energy and biomethane production, the global actual biogas production in Europe is around 35 billion m 3 per year. The implementation of innovative and effective pre-treatments, isolated and/or combined, expanding the range of potential feedstock can make the sector even more robust, and biogas production could be increased by 20-30% (Paudel et al, 2017) equivalent to 7 to 10.5 billion m 3 biogas per year. If we consider to substituting the energy produced from coal, which determines an emission of 0.94 kgCO 2 -eq per kWh produced, with this renewable energy source we can expect a net reduction in CO 2 emissions in the range of 15-22 million tonCO 2 -eq per year.…”

Section: Introductionmentioning

confidence: 99%

A research challenge vision regarding management of agricultural waste in a circular bio-based economy

Gontard

Sonesson

Birkved

et al. 2018

Critical Reviews in Environmental Science and Technology

230

127

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Agricultural waste is a huge pool of untapped biomass resources that may even represent economic and environmental burdens. They can be converted into bioenergy and bio-based products by cascading conversion processes, within circular economy, and should be considered residual resources. Major challenges are discussed from a transdisciplinary perspective, focused on Europe situation. Environmental and economic consequences of agricultural residue management chains are difficult to assess due to their complexity, seasonality and regionality. Designing multi-criteria decision support tools, applicable at an early-stage of research, is discussed. Improvement of Anaerobic Digestion (AD), one of the most mature conversion technologies, is discussed from a technological point of view and waste feedstock geographical and seasonal variations. Using agricultural residual resources for producing high-value chemicals is a considerable challenge analysed here, taking into account innovative eco-efficient and cost-effective cascading conversion processes (bio-refinery concept). Moreover, the promotion of agricultural residuesbased business is discussed through industrial ecology, to promote synergy, on a local basis, between different agricultural and industrial value chains. Finally, to facilitate a holistic approach and optimise materials and knowledge flows KEY WORDS Agriculture; waste; eco-design; biogas; bio-based materials; circular economy CONTACT Nathalie Gontard nathalie.gontard@inra.fr UMR 1208 IATE Agro-Polymer Engineering and Emerging Technologies,

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Pretreatment of agricultural biomass for anaerobic digestion: Current state and challenges

Cited by 295 publications

References 113 publications

Insight into Pretreatment Methods of Lignocellulosic Biomass to Increase Biogas Yield: Current State, Challenges, and Opportunities

Insight into Pretreatment Methods of Lignocellulosic Biomass to Increase Biogas Yield: Current State, Challenges, and Opportunities

Improvement of Anaerobic Digestion of Hydrolysed Corncob Waste by Organosolv Pretreatment for Biogas Production

A research challenge vision regarding management of agricultural waste in a circular bio-based economy

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