Biomethane potential test reveals microbial adaptation and increased methane yield during anaerobic co-digestion

2021 ◽  
pp. 100754
Author(s):  
Juliet Ohemeng-Ntiamoah ◽  
Tania Datta
Keyword(s):  
Methane Yield ◽  
Biomethane Potential ◽  
Microbial Adaptation ◽  
Potential Test

scholarly journals Biomethane Potential Test To Access The Feasibility of Vegetable And Fruit Waste For Methane Yield Using Different Inoculums To Substrate Ratios

2021 ◽  
Author(s):  
Akanksha Agrawal ◽  
Parmesh Kumar Chaudhari ◽  
Prabir Ghosh
Keyword(s):  
Fossil Fuels ◽  
Global Climate ◽  
Methane Yield ◽  
Vegetable Waste ◽  
Fruit And Vegetable ◽  
Glass Bottle ◽  
Biogas Yield ◽  
Biomethane Potential ◽  
Substrate Ratio ◽  
Potential Test

Abstract To address the world's energy issue and global climate change, a green, efficient and carbon-neutral renewable energy sourcesare in great demand to replace fossil fuels. The study was undertaken to determine optimal inoculum to substrate ratio for increase in biogas generation via co-digestion of fruit and vegetable waste under mesophilic environmental conditions (25–34oC). Biomethane potential of the fruit and vegetable waste was accessed in terms of biogas yield. Digestate from gobar gas plant was taken as inoculum. Biomethane potential (BMP) assay was performed in a 500ml glass bottle with suitable inlet and outlet arrangement for taking feed and collection of biogas. Inoculum to substrateratio chosen for the study was 0.2, 0.3,0.5,0.7 and 0.8. Highest daily biogas yield was obtained for inoculum to substrate ratio of 30: 70 i.e. reactor R2 which is equivalent to 440 ml on day 14 with methane yield of 58%. Cumulative biogas yields for different inoculum to substrate ratio were in the range of 6–11.378 L/day.

Determination of methane yield of cellulose using different experimental setups

2014 ◽  
Vol 70 (4) ◽  
pp. 599-604 ◽  
Author(s):  
Bing Wang ◽  
Ivo Achu Nges ◽  
Mihaela Nistor ◽  
Jing Liu
Keyword(s):  
Water Column ◽  
Test System ◽  
Methane Yield ◽  
Biochemical Methane Potential ◽  
Methane Potential ◽  
Bmp Test ◽  
Potential Test

In this work, biochemical methane potential (BMP) tests with cellulose as a model substrate were performed with the aid of three manually operated or conventional experimental setups (based on manometer, water column and gas bag) and one automated apparatus specially designed for analysis of BMP. The methane yields were 340 ± 18, 354 ± 13, 345 ± 15 and 366 ± 5 ml CH4/g VS obtained from experimental setups with manometer, water column, gas bag, and automatic methane potential test system, which corresponded to a biodegradability of 82, 85, 83 and 88% respectively. The results demonstrated that the methane yields of cellulose obtained from conventional and automatic experimental setups were comparable; however, the methane yield obtained from the automated apparatus showed greater precision. Moreover, conventional setups for the BMP test were more time- and labour-intensive compared with the automated apparatus.

scholarly journals Biodegradability and kinetic studies on biomethane production from okra (Abelmoschus esculentus) waste

2019 ◽  
Vol 115 (7/8) ◽  
Author(s):  
Samson N. Ugwu ◽  
Christopher C. Enweremadu
Keyword(s):  
Renewable Energy Sources ◽  
Abelmoschus Esculentus ◽  
Methane Yield ◽  
Organic Substrates ◽  
Order Kinetic ◽  
First Order ◽  
Biomethane Potential ◽  
Growth Functions ◽  
Biomethane Production ◽  
Kinetics Of

Emerging from the energy crisis of 2008 in South Africa, climate change concerns and the global desire to reduce high ozone-depleting emissions, renewable energy sources like biogas are gaining wide acceptance in most localities for heating and electricity. The paucity of feedstock varieties is a major challenge plaguing the sustainability of this sector. Biomethane potential, biodegradability and degradation kinetics of organic substrates are essential for assessing the suitability of feedstocks for methane generation and the overall performance of the anaerobic digestion process in biogas plants. Waste from the vegetable okra (Abelmoschus esculentus) is a novel substrate; its biodegradability and degradation dynamics in biomethane production are largely unstudied, and were therefore the aims of this research. The substrate was digested for 25 days at the mesophilic condition and the biomethane potential data were recorded. Measured data of methane yield and the elemental composition of the substrate were used to fit five models (modified Gompertz, Stannard, transference function, logistic and first-order models) to predict degradation parameters and determine biodegradability of the substrate, respectively. Low lag phase (0.143 d), positive kinetic constant (0.2994/d) and the model fitness indicator ( less than 10) showed that transference and first-order kinetic models predicted the methane yield better than did other growth functions. The experimental methane yield was 270.98 mL/gVS, theoretical methane yields were 444.48 mL/gVS and 342.06 mL/gVS and model simulation ranged from 267.5 mL/gVS to 270.89 mL/gVS. With a prediction difference of 0.03–1.28%, all growth functions acceptably predicted the kinetics of A. esculentus waste. The findings of this study offer information on this novel substrate important for its use in large-scale biogas production.

Determination of biogas process efficiency - a practice-oriented alternative to the biomethane potential test

2019 ◽  
Vol 7 ◽  
pp. 100201 ◽  
Author(s):  
René Casaretto ◽  
Fritz Thomsen ◽  
Jens Born ◽  
Jens Bo Holm-Nielsen
Keyword(s):  
Process Efficiency ◽  
Biomethane Potential ◽  
Biogas Process ◽  
Potential Test

scholarly journals Evaluation of Biogas Production from the Co-Digestion of Municipal Food Waste and Wastewater Sludge at Refugee Camps Using an Automated Methane Potential Test System

Energies ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 32 ◽  
Author(s):  
Mohammad Al-Addous ◽  
Motasem N. Saidan ◽  
Mathhar Bdour ◽  
Mohammad Alnaief
Keyword(s):  
Food Waste ◽  
Organic Waste ◽  
Biogas Production ◽  
Test System ◽  
Wastewater Sludge ◽  
Methane Yield ◽  
Refugee Camps ◽  
Methane Potential ◽  
Municipal Food Waste ◽  
Potential Test

The potential benefits of the application of a circular economy—converting biomass at Za'atari Syrian refugee camps into energy—was investigated in this study. Representative organic waste and sludge samples were collected from the camp, mixed in different ratios, and analyzed in triplicate for potential biogas yield. Numerous calorific tests were also carried out. The tangential benefit of the co-digestion that was noticed was that it lowered the value of the total solid content in the mixture to the recommended values for wet digestion without the need for freshwater. To test the potential methane production, the automated methane potential test system (AMPTS) and the graduated tubes in the temperature-controlled climate room GB21 were utilized. Also, calorific values were determined for the organic waste and sludge on both a dry and a wet basis. The maximum biogas production from 100% organic waste and 100% sludge using AMPTS was 153 m3 ton-1 and 5.6 m3 ton-1, respectively. Methane yield reached its maximum at a Vs sub/ Vs inoculum range of 0.25–0.3. In contrast, the methane yield decreased when the Vs sub/ Vs inoculum exceeded 0.46. The optimum ratio of mixing of municipal food waste to sludge must be carefully selected to satisfy the demands of an energy production pilot plant and avoid the environmental issues associated with the sludge amount at wastewater treatment plants (WWTPs). A possible ratio to start with is 60–80% organic waste, which can produce 21–65 m3· biogas ton-1 fresh matter (FM). The co-digestion of organic waste and sludge can generate 38 Nm3/day of methane, which, in theory, can generate about 4 MW in remote refugee camps.

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