Challenges and opportunities of lignocellulosic biomass for anaerobic digestion

Paul, Subhash; Dutta, Animesh

doi:10.1016/j.resconrec.2017.12.005

Cited by 330 publications

(129 citation statements)

References 116 publications

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“…The use of lignocellulosic biomass in AD provides fermentable sugars from cheap and readily available substrate (Balat, 2011;Paul and Dutta, 2018). For instance, cellulose is the most dominant polysaccharide component in lignocellulosic biomass made up of linear glucose units linked by β-1, 4 glucosidic bonds.…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, the high carbon:nitrogen (C/N) ratio of lignocellulosic biomass is a major limiting factor for higher biogas generation during anaerobic digestion. To circumvent this, a low C/N ratio biomass combined with high C/N ratio lignocellulosic biomass can provide the required complement for efficient anaerobic co-digestion and biogas production (Paul and Dutta, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Biogas Production From Anaerobic Co-digestion of Lignocellulosic Biomass and Poultry Feces Using Source Separated Human Urine as Buffering Agent

Eduok

John

Ita

et al. 2018

Front. Environ. Sci.

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Effect of source separated human urine as buffering agent compared to sodium bicarbonate and water in anaerobic co-digestion of lignocellulosic biomass and poultry feces was evaluated in laboratory scale reactor for 180 days at 37 ± 2 • C. Mean biogas volume ranged from 37 ± 8 to 101 ± 18 mL gVS −1 in the urine buffered reactors which was 1-5 times higher than the bicarbonate and water buffered reactors and the difference was significant at p = 0. 05. Total volatile fatty acids (VFA) concentration ranged between 396 and 1,400 mg L −1 with a pH of 6.9 ± 0.3 and 7.8 ± 0.1, respectively. In contrast, VFA concentration ranged between 386 and 3,109 mg L −1 (pH 7.6 ± 0.2 and 4.8 ± 0.4) in sodium bicarbonate buffered digestate and control (water) respectively. The result indicates buffering capacity of urine on anaerobic co-digestion with positive effect on biogas production. The Archaeal isoprenoids included markers of aceticlastic and hydrogenotrophic methanogens with a relative abundance that ranged between 0.71-18, 3-55, and 2-59 µg g −1 dry matter in the water (control), bicarbonate and urine buffered digestate, respectively. The Archaeal abundance was 1.12 and 6 times higher in the combined female/male urine than the bicarbonate buffered digestate and the control, and the difference was significant at p = 0.05. Overall, this study demonstrates that human urine with no pharmaceutical loadings as a wetting and buffering agent is a promising option for anaerobic co-digestion with competitive edge over sodium bicarbonate on lignocellulosic biomass saccharification for enhanced biogas production. HIGHLIGHTS-Source separated human urine served as buffer in anaerobic co-digestion process.-Combined female/male urine exerted an additive effect on biogas production. -Competitive edge offered by the combined female/male urine over sodium bicarbonate buffer in relation to biogas produced. -Evidence of synergy for enhanced biogas production from high C/N ratio lignocellulosic biomass combined with low C/N ratio poultry feces.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhanced Biogas Production From Anaerobic Co-digestion of Lignocellulosic Biomass and Poultry Feces Using Source Separated Human Urine as Buffering Agent

Eduok

John

Ita

et al. 2018

Front. Environ. Sci.

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“…Higher hydrolysis rate and glucose content in the hydrolysate were attained during the enzymatic hydrolysis stage of pretreated rice straw using microwave/acid/alkali/H2O2 (Menon and Rao, 2012). Microwave with ionic liquid pretreatment of Crotalaria juncea at 160°C with 46 min of reaction time led to a glucose yield of 78.7% (Paul and Dutta, 2018). Microwave with acid pretreatment of Jabon kraft pulp produced 49% of reducing sugars at 190°C (Fatriasari et al, 2019).…”

Section: Physico-chemical Pretreatmentmentioning

confidence: 97%

Pretreatment methods for lignocellulosic biofuels production: current advances, challenges and future prospects

et al. 2020

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Keywords:Lignocellulosic biomass has been recognized as promising feedstock for biofuels production. However, the high cost of pretreatment is one of the major challenges hindering large-scale production of biofuels from these abundant, indigenouslyavailable, and economic feedstock. In addition to high capital and operation cost, high water consumption is also regarded as a challenge unfavorably affecting the pretreatment performance. In the present review, advances in lignocellulose pretreatment technologies for biofuels production are reviewed and critically discussed. Moreover, the challenges faced and future research needs are addressed especially in optimization of operating parameters and assessment of total cost of biofuel production from lignocellulose biomass at large scale by using different pretreatment methods. Such information would pave the way for industrial-scale lignocellulosic biofuels production. Overall, it is important to ensure that throughout lignocellulosic bioethanol production processes, favorable features such as maximal energy saving, waste recycling, wastewater recycling, recovery of materials, and biorefinery approach are considered.

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“…Pretreatment technologies for positive effects on rheology, increased degradability and gas production, and a reduction of the necessary retention time will become increasingly important. There is a multitude of pretreatment techniques decomposing the biomass physically (mechanical, thermal, baric, ultrasound, microwave), chemically (acid, alkali) or biologically (composting, ensiling, enzymes, fungi) [148,154,[156][157][158]. Mechanical and enzymatic disintegration methods, in particular, have largely evolved within recent years, but further research is required to identify the most effective pretreatment techniques for different types of biomass, to upscale them from lab to pilot to full scale and to consider net effects on energy yield, greenhouse gas emissions and profitability.…”

Section: Engineering For An Increased Use Of Residues and Novel Feedsmentioning

confidence: 99%

The Future Agricultural Biogas Plant in Germany: A Vision

et al. 2019

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After nearly two decades of subsidized and energy crop-oriented development, agricultural biogas production in Germany is standing at a crossroads. Fundamental challenges need to be met. In this article we sketch a vision of a future agricultural biogas plant that is an integral part of the circular bioeconomy and works mainly on the base of residues. It is flexible with regard to feedstocks, digester operation, microbial communities and biogas output. It is modular in design and its operation is knowledge-based, information-driven and largely automated. It will be competitive with fossil energies and other renewable energies, profitable for farmers and plant operators and favorable for the national economy. In this paper we discuss the required contribution of research to achieve these aims.

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Challenges and opportunities of lignocellulosic biomass for anaerobic digestion

Cited by 330 publications

References 116 publications

Enhanced Biogas Production From Anaerobic Co-digestion of Lignocellulosic Biomass and Poultry Feces Using Source Separated Human Urine as Buffering Agent

Enhanced Biogas Production From Anaerobic Co-digestion of Lignocellulosic Biomass and Poultry Feces Using Source Separated Human Urine as Buffering Agent

Pretreatment methods for lignocellulosic biofuels production: current advances, challenges and future prospects

The Future Agricultural Biogas Plant in Germany: A Vision

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