The Effect of Detoxification of Lignocellulosic Biomass for Enhanced Methane Production

The aim of this research is to examine the effect of lignocellulosic biomass detoxification on the efficiency of the methane fermentation process. Both for corn straw and rye straw, the methane yield was expressed per volume of fermentation medium and per mass of volatile solids (VS) added. Lignocellulosic biomass was subjected of thermo-chemical and enzymatic sequential pretreatments. It was found that methane yield was higher by 22% when using the detoxification process. In these variants, CH4 yield was 18.86 L/L for corn straw and 17.69 L/L for rye straw; while methane yield expressed per mass of VS added was 0.31 m3/kg VS for corn straw and 0.29 m3/kg VS for rye straw. The inclusion of a detoxification step in pretreatments of biomass lignocellulosic increases the degree of organic substance decomposition and enhances methane yield. The results show that a two-step pretreatment, alkaline/enzymatic with a detoxification process, is necessary for the effective generation of high methane concentration biogas.

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Solid-Phase Methane Fermentation of Solid Wastes

Journal of Energy Resources Technology ◽

10.1115/1.3231209 ◽

1985 ◽

Vol 107 (3) ◽

pp. 402-405 ◽

Cited By ~ 11

Author(s):

S. Ghosh

Keyword(s):

Municipal Solid Waste ◽

Solid Waste ◽

Fermentation Process ◽

Solid Phase ◽

Solid Wastes ◽

Methane Yield ◽

Methane Fermentation ◽

Batch Operation ◽

Volatile Solids ◽

Process Operation

This paper presents the development of a novel solid-phase methane fermentation process involving acidic bioleachate production from an organic bed and biomethanation of the bed-liquefaction products in an external methane digester. Process operation with municipal solid waste showed that about 81 percent of the biodegradable volatile solids (VS) could be stabilized during three months of batch operation to afford a methane yield of 0.21 std m3 / kg VS added under ambient (∼25°C) conditions; this compares favorably with an ultimate mesophilic (35°C) methane yield of 0.26 std m3 / kg VS added.

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Co-Digestion of Rice Straw with Cow Manure in an Innovative Temperature Phased Anaerobic Digestion Technology: Performance Evaluation and Trace Elements

Energies ◽

10.3390/en14092561 ◽

2021 ◽

Vol 14 (9) ◽

pp. 2561

Author(s):

Furqan Muhayodin ◽

Albrecht Fritze ◽

Oliver Christopher Larsen ◽

Marcel Spahr ◽

Vera Susanne Rotter

Keyword(s):

Trace Elements ◽

Anaerobic Digestion ◽

Greenhouse Gas ◽

Rice Straw ◽

Methane Yield ◽

Methane Formation ◽

Cow Manure ◽

Volatile Solids ◽

Mass Fractions ◽

Cu And Zn

Rice straw is an agricultural residue produced in abundant quantities. Open burning and plowing back the straw to the fields are common practices for its disposal. In-situ incorporation and burning cause emissions of greenhouse gas and particulate matter. Additionally, the energy potential of rice straw is lost. Anaerobic digestion is a technology that can be potentially used to utilize the surplus rice straw, provide renewable energy, circulate nutrients available in the digestate, and reduce greenhouse gas emissions from rice paddies. An innovative temperature phased anaerobic digestion technology was developed and carried out in a continuous circulating mode of mesophilic and hyperthermophilic conditions in a loop digester (F1). The performance of the newly developed digester was compared with the reference digester (F2) working at mesophilic conditions. Co-digestion of rice straw was carried out with cow manure to optimize the carbon to nitrogen ratio and to provide the essential trace elements required by microorganisms in the biochemistry of methane formation. F1 produced a higher specific methane yield (189 ± 37 L/kg volatile solids) from rice straw compared to F2 (148 ± 36 L/kg volatile solids). Anaerobic digestion efficiency was about 90 ± 20% in F1 and 70 ± 20% in F2. Mass fractions of Fe, Ni, Co, Mo, Cu, and Zn were analyzed over time. The mass fractions of Co, Mo, Cu, and Zn were stable in both digesters. While mass fractions of Fe and Ni were reduced at the end of the digestion period. However, no direct relationship between specific methane yield and reduced mass fraction of Fe and Ni was found. Co-digestion of rice straw with cow manure seems to be a good approach to provide trace elements except for Se.

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Effects of granular activated carbon and temperature on the viscosity and methane yield of anaerobically digested of corn straw with different dry matter concentrations

Bioresource Technology ◽

10.1016/j.biortech.2021.125109 ◽

2021 ◽

pp. 125109

Author(s):

Yongdi Liu ◽

Yulei Qian ◽

Xiaoyu Yong ◽

Honghua Jia ◽

Ping Wei ◽

...

Keyword(s):

Activated Carbon ◽

Dry Matter ◽

Granular Activated Carbon ◽

Methane Yield ◽

Corn Straw

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Novel low-cost pre-treatment material for enhancing the methane yield during anaerobic digestion of lignocellulosic biomass feedstocks: Experimental and kinetic study

Renewable Energy ◽

10.1016/j.renene.2021.07.064 ◽

2021 ◽

Author(s):

Uchenna Egwu ◽

Eni Oko ◽

Macmanus Chinenye Ndukwu ◽

Paul Sallis

Keyword(s):

Anaerobic Digestion ◽

Kinetic Study ◽

Lignocellulosic Biomass ◽

Low Cost ◽

Methane Yield ◽

Biomass Feedstocks ◽

Pre Treatment

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Effect of hydraulic retention time on pretreatment of blended municipal sludge

Water Science & Technology ◽

10.2166/wst.2011.729 ◽

2011 ◽

Vol 64 (4) ◽

pp. 967-973

Author(s):

S. Koyunluoglu-Aynur ◽

R. Riffat ◽

S. Murthy

Keyword(s):

Retention Time ◽

Volatile Fatty Acids ◽

Hydraulic Retention Time ◽

Operating Conditions ◽

Methane Yield ◽

Municipal Sludge ◽

Volatile Solids ◽

Significant Difference ◽

Autothermal Thermophilic Aerobic Digestion ◽

Pretreatment Processes

The objective of the present work was to evaluate the effect of hydraulic retention time (HRT) on hydrolysis and acidogenesis for the pretreatment processes: acid phase digestion (APD) and autothermal thermophilic aerobic digestion (ATAD) using blended municipal sludge. The effect of the different pretreatment steps on mesophilic anaerobic digestion (MAD) was evaluated in terms of methane yield, keeping the operating conditions of the MAD the same for all systems. Best operating conditions for both APD and ATAD were observed for 2.5 d HRT with high total volatile fatty acids (tVFA), and the highest methane yield observed for MAD. No significant difference was observed between the two processes in terms of overall volatile solids (VS) reduction with same total HRT. The autothermal process produced heat of 14,300 J/g VS removed from hydrolytic and acetogenic reactions without compromising overall methane yields when the HRT was 2.5 d or lower and the total O2 used was 0.10 m3 O2/g VS added or lower. However, the process needs the input of oxygen and engineering analysis should balance these differences when considering the relative merits of the two pretreatment processes. This is the first study of its kind directly comparing these two viable pretreatment processes with the same sludge.

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Effects of experimental parameters on methane production and volatile solids removal from tomato and pepper plant wastes

BioResources ◽

10.15376/biores.15.3.4763-4780 ◽

2020 ◽

Vol 15 (3) ◽

pp. 4763-4780

Author(s):

Saraí Camarena-Martínez ◽

Juan H. Martínez-Martínez ◽

Adriana Saldaña-Robles ◽

Hector G. Nuñez-Palenius ◽

Rogelio Costilla-Salazar ◽

...

Keyword(s):

Methane Production ◽

Methane Yield ◽

Pepper Plant ◽

Limited Information ◽

Total Solids ◽

Volatile Solids ◽

Vs Removal ◽

Solids Content ◽

Solids Removal ◽

Positive Effect

In Mexico, protected agriculture generates large amounts of tomato and pepper plants residues (TPW and PPW, respectively). Given the limited information on methane production from anaerobic digestion of these wastes, this study aimed to determine the effects of the substrate/inoculum (S/I) ratio, temperature, and total solids content on methane production and volatile solids (VS) removal by two subsequent batch experiments (Experiments A and B). Experiment A was performed to evaluate the substrate/inoculum ratios of 0.5, 1.0, and 2.0 at room temperature (22 ± 4.5 °C). Based on the best methane yield from experiment A, a new experiment was established (Experiment B) using only tomato wastes, where temperature was kept at 29 °C and 39 °C. The total solids content was analyzed depending on the S/I ratio used. For both substrates, an S/I ratio of 0.5 was the most appropriate for methane production. The temperature had a positive effect on volatile solids removal and methane yield. In contrast, the total solids content (% TS) only had a positive effect on methane production. To the authors’ knowledge, this is the first study evaluating the effect of the S/I ratio on methane production from tomato and pepper plant wastes.

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Anaerobic digestion of hydrothermally-pretreated lignocellulosic biomass: Influence of pretreatment temperatures, inhibitors and soluble organics on methane yield

Bioresource Technology ◽

10.1016/j.biortech.2019.03.114 ◽

2019 ◽

Vol 284 ◽

pp. 128-138 ◽

Cited By ~ 35

Author(s):

Chettaphong Phuttaro ◽

Chayanon Sawatdeenarunat ◽

K.C. Surendra ◽

Piyarat Boonsawang ◽

Sumate Chaiprapat ◽

...

Keyword(s):

Anaerobic Digestion ◽

Lignocellulosic Biomass ◽

Methane Yield ◽

Biomass Influence

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Evaluation on the Methane Production Potential of Wood Waste Pretreated with NaOH and Co-Digested with Pig Manure

Catalysts ◽

10.3390/catal9060539 ◽

2019 ◽

Vol 9 (6) ◽

pp. 539 ◽

Cited By ~ 10

Author(s):

Renfei Li ◽

Wenbing Tan ◽

Xinyu Zhao ◽

Qiuling Dang ◽

Qidao Song ◽

...

Keyword(s):

Anaerobic Digestion ◽

Lignocellulosic Biomass ◽

Methane Production ◽

Biogas Production ◽

Untreated Wood ◽

Wood Waste ◽

Methane Yield ◽

Pig Manure ◽

Naoh Pretreatment ◽

Digestion Technique

Wood waste generated during the tree felling and processing is a rich, green, and renewable lignocellulosic biomass. However, an effective method to apply wood waste in anaerobic digestion is lacking. The high carbon to nitrogen (C/N) ratio and rich lignin content of wood waste are the major limiting factors for high biogas production. NaOH pre-treatment for lignocellulosic biomass is a promising approach to weaken the adverse effect of complex crystalline cellulosic structure on biogas production in anaerobic digestion, and the synergistic integration of lignocellulosic biomass with low C/N ratio biomass in anaerobic digestion is a logical option to balance the excessive C/N ratio. Here, we assessed the improvement of methane production of wood waste in anaerobic digestion by NaOH pretreatment, co-digestion technique, and their combination. The results showed that the methane yield of the single digestion of wood waste was increased by 38.5% after NaOH pretreatment compared with the untreated wood waste. The methane production of the co-digestion of wood waste and pig manure was higher than that of the single digestion of wood waste and had nonsignificant difference with the single-digestion of pig manure. The methane yield of the co-digestion of wood waste pretreated with NaOH and pig manure was increased by 75.8% than that of the untreated wood waste. The findings indicated that wood waste as a sustainable biomass source has considerable potential to achieve high biogas production in anaerobic digestion.

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