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

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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Significance of Pretreatment in Enhancing the Performance of Dry Anaerobic Digestion of Food Waste: An Insight on Full Scale Implementation Strategy with Theoretical Analogy

Processes ◽

10.3390/pr8091018 ◽

2020 ◽

Vol 8 (9) ◽

pp. 1018

Author(s):

Vijayalakshmi Arelli ◽

Sudharshan Juntupally ◽

Sameena Begum ◽

Gangagni Rao Anupoju

Keyword(s):

Anaerobic Digestion ◽

Food Waste ◽

Scale Up ◽

Methane Yield ◽

Net Energy ◽

Time Duration ◽

Methane Generation ◽

Pre Treatment ◽

The Impact ◽

Dry Anaerobic Digestion

The aim of this study was to treat food waste containing 25% total solids (TS) through dry anaerobic digestion (dry AD) process at various pressures (0.5 to 2.5 kg/cm2) and different time duration (20 to 100 min) to understand the impact of pretreatment in enhancing the methane generation potential along with insights on scale up. The findings revealed that vs. reduction and methane yield of 60% and 0.25 L CH4/(g VSadded) can be achieved with pretreated food waste at two kilograms per square centimeter, while pretreatment of food waste at 2 kg/cm2 for 100 min enhanced the vs. reduction from 60% to 85% and methane yield from 0.25 to 0.368 L CH4/(g VSadded). However, the net energy indicated that 40 min of pre -treatment at two kilograms per square centimeter can be a suitable option as methane yield and vs. reduction of 0.272 L CH4/(g VSadded) and 70%, respectively was achieved. The vs. reduction and the methane yield of 45% and 0.14 L CH4/(g VSadded), respectively was obtained from untreated food waste which illustrated that pretreatment had significantly impacted on the enhancement of methane generation and organic matter removal which can make the dry AD process more attractive and feasible at commercial scale.

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High pressure thermal hydrolysis as pre-treatment to increase the methane yield during anaerobic digestion of microalgae

Bioresource Technology ◽

10.1016/j.biortech.2012.12.125 ◽

2013 ◽

Vol 131 ◽

pp. 128-133 ◽

Cited By ~ 103

Author(s):

Philip Keymer ◽

Ian Ruffell ◽

Steven Pratt ◽

Paul Lant

Keyword(s):

High Pressure ◽

Anaerobic Digestion ◽

Methane Yield ◽

Thermal Hydrolysis ◽

Pre Treatment

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Anaerobic digestion of straw and corn stover: The effect of biological process optimization and pre-treatment on total bio-methane yield and energy performance

Biotechnology Advances ◽

10.1016/j.biotechadv.2016.09.004 ◽

2016 ◽

Vol 34 (8) ◽

pp. 1289-1304 ◽

Cited By ~ 65

Author(s):

Serena Croce ◽

Qiao Wei ◽

Giuliana D'Imporzano ◽

Renjie Dong ◽

Fabrizio Adani

Keyword(s):

Anaerobic Digestion ◽

Corn Stover ◽

Process Optimization ◽

Biological Process ◽

Energy Performance ◽

Methane Yield ◽

Pre Treatment

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The effect of A. Fumigatus SK1 and trichoderma sp. on the biogas production from cow manure

Malaysian Journal of Fundamental and Applied Sciences ◽

10.11113/mjfas.v14n3.1066 ◽

2018 ◽

Vol 14 (3) ◽

pp. 353-359 ◽

Cited By ~ 4

Author(s):

Zulfah Zulkifli ◽

Nazaitulshila Rasit ◽

Noor Azrimi Umor ◽

Shahrul Ismail

Keyword(s):

Anaerobic Digestion ◽

Lignocellulosic Biomass ◽

Biogas Production ◽

Reducing Sugar ◽

Treatment Result ◽

Cow Manure ◽

Lignin Removal ◽

Trichoderma Sp ◽

Working Volume ◽

Pre Treatment

Lignocellulosic material consists of lignin, cellulose and hemicellulose. Converting lignocellulosic biomass such as cow manure (CM) into value-added products provides a potential alternative. Hydrolysis of cellulose and hemicellulose is a limiting step during Anaerobic Digestion (AD) of lignocellulosic biomass. Lignin in lignocellulosic biomass is the barrier for hydrolysis, thus limits the biogas production. In this study, the effect of A.Fumigatus SK1 and Trichoderma sp. on enzymatic pre-treatment of CM was investigated with respect to the biogas production. Three set of anaerobic digestion assays were carried out, with a working volume of 500 mL at 35 ± 2°C and 120 rpm. The first set of fermentation contained untreated CM. The second set of fermentation involved addition of A.Fumigatus SK1, and the last set contained Trichoderma sp. Several analysis were conducted to determine the biomethane potential (BMP), anaerobic biodegradability, reducing sugars concentration and lignin removal of CM before and after pre-treatment. Result showed that, among both evaluated pre-treatment methods, CM treated with Trichoderma sp. gave the highest methane potential with 0.023 LCH4-STP g VS-1 compared to CM treated with A.Fumigatus SK1(0.011 LCH4-STP g VS-1). A good correlation have been found in this study between lignin removal and reducing sugar produced where, the total lignin removal after treated with Trichoderma sp. was 60% followed by 43% after treated with A.Fumigatus SK1.The reducing sugar produced after pre-treated with Trichoderma sp. and A.Fumigatus SK1 was about 9.59 and 4.91 μmol glucose, respectively. These results collectively suggested that CM treated with Trichoderma sp. could be a better pre-treatment method for the higher methane production in anaerobic mono-digestion process.

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Techno-economic feasibility of anaerobic digestion of cheese whey in small Italian dairies and effect of ultrasound pre-treatment on methane yield

Journal of Environmental Management ◽

10.1016/j.jenvman.2019.06.014 ◽

2019 ◽

Vol 246 ◽

pp. 557-563 ◽

Cited By ~ 14

Author(s):

Matia Mainardis ◽

Simone Flaibani ◽

Matteo Trigatti ◽

Daniele Goi

Keyword(s):

Anaerobic Digestion ◽

Cheese Whey ◽

Economic Feasibility ◽

Methane Yield ◽

Pre Treatment

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Ammonium uptake by zeolite and treatment in UASB reactor of piggery wastewater

Water Science & Technology ◽

10.2166/wst.1995.0461 ◽

1995 ◽

Vol 32 (12) ◽

pp. 73-81 ◽

Cited By ~ 8

Author(s):

R. Cintoli ◽

B. Di Sabatino ◽

L. Galeotti ◽

G. Bruno

Keyword(s):

Anaerobic Digestion ◽

Low Cost ◽

Treatment Plant ◽

Gas Production ◽

Ammonium Uptake ◽

Uasb Reactor ◽

Organic Load ◽

Piggery Wastewater ◽

Final Treatment ◽

Pre Treatment

A treatment plant of pre-screened piggery wastewater is tested at lab-scale using Italian zeolites (of very low cost) to strongly reduce the NH4+ from 1500 mg/l to 300–400 mg/l and anaerobic digestion in UASB and UASB-AF reactors to remove organics. The ion-exchange pre-treatment by zeolite leads to a reduction of toxicity of wastewater towards anaerobic microbial population and improves the UASB and UASB-AF reactors yields in organics reduction and gas production. The laboratory plant in this configuration reaches a COD removal range of 60–80% and a good reduction of effluent nutrients concentration whereas the use of a anaerobic second stage gave modest results in organics removal because of low applied organic load. A treatment cycle composed of a pre-treatment with zeolites, anaerobic digestion in UASB-AF reactor and a final treatment in an aerobic activated sludge plant is giving very good preliminary results.

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