Comparative Study of Biogas Yield Pattern in Some Animal and Household Wastes

Babatola, J. O.

doi:10.4314/afrrev.v2i4.41081

Cited by 15 publications

(17 citation statements)

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“…nd and 23 rd day respectively. Thereafter the volume continued to drop gradually for the rest of the study period until it finally fell back to 0.08 m 3 .The delay in the production of gas till the 10 th day asserts that cow dung contains fibrous materials that takes time to degrade which is in line with the report of Babatola (2008).…”

Section: Volume Of Biogas Produced During and After The Fermentationsupporting

confidence: 78%

“…When the digester temperature is maintained at 25°C, it takes approximately 50 days for digestion of cattle waste. But, if the temperature ranges between 32 and 38°C is maintained, digestion is completed within 28 days (Babatola, 2008). Digestion at high temperature range (30 to 40°C) supports higher rates of biological degradation and biogas production (Itodo et al, 2002).…”

Section: Relationship Between Volume Of Daily Methane Gas Production mentioning

confidence: 99%

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Design, fabrication and evaluation of bio-digester for generating bio-gas and bio-fertiliser for Auchi polytechnic demonstration farm

Onuoha¹,

Unuigbe²,

Suleiman³

et al. 2019

Int. J. Water Res. Environ. Eng.

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A 4000 L bio-digester was designed and fabricated using 5 mm mild steel plate with the main purpose of generating biogas and bio-fertiliser for Auchi Polytechnic Demonstration Farm. To achieve this, a varying ratio of 1.155 m 3 : 2.310 m 3 mixtures of cow dung and water were anaerobically digested in the batch digester. The experiment lasted for 33 days during which the quantity of gas generated were evaluated. The volume of daily methane gas production ranged from 0 to 1.2 m 3. The total volume of gas generated from the digestion was 21.68 m 3 and comprised of 58% CH4, 25% CO 2 , 15% H 2 S and 2% other impurities. The results of physiochemical properties of the feedstock revealed a progressive increase of 6.0-6.2 in pH value from Day 4 after which it dropped sharply in value to 5.5 on the second week of fermentation. The minimum and maximum ambient temperatures of 24 and 30°C were observed while the slurry temperatures varied from 27 to 35°C. The average pressure built up of the digester was about 214,000 N/m 2. The results further showed that biogas production is sensitive to pH and cannot produce optimally below the pH of 6.5. To achieve optimum biogas generation, a temperature range within mesophilic condition of 25 to 40°C and pH values of 7 should be maintained.

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Section: Volume Of Biogas Produced During and After The Fermentationsupporting

confidence: 78%

Section: Relationship Between Volume Of Daily Methane Gas Production mentioning

confidence: 99%

Design, fabrication and evaluation of bio-digester for generating bio-gas and bio-fertiliser for Auchi polytechnic demonstration farm

Onuoha¹,

Unuigbe²,

Suleiman³

et al. 2019

Int. J. Water Res. Environ. Eng.

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“…According to [7] and [9], the Total Volume of the digester, V T is the addition of the Slurry volume, V s and the storage capacity of the gas, V g .…”

Section: Digester Tank Capacity Determinationmentioning

confidence: 99%

“…Achieving solutions to probable scarcity of fossil fuels and environmental problems that the world is facing today requires long-term potential actions for sustainable development [9] [10] [11]. The dependence on fuel wood for the domestic energy supply has aggravated deforestation, with annual deforestation rate estimated at 3%, which is equivalent to the loss of 410,000 hectares of forested land annually.…”

Section: Introductionmentioning

confidence: 99%

Development of a Batch-Type Biogas Digester Using a Combination of Cow Dung, Swine Dung and Poultry Dropping

Olanrewaju¹,

Olubanjo²

2019

IJCCE

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The overdependence on crude oil in African countries warrants the need for alternative sources of energy. A 56-litre-capacity biogas digester was designed, fabricated and evaluated. Investigations were made into the production of biogas from the mixture of cow dung, swine dung and poultry dropping. Standard equations and models were used in the design of the components of the manually operated digester. The digester temperature, ambient temperature and pH were monitored during the experiment. The proximate analysis showed that volatile solid, total solid and moisture content for the mixed substrates at the initial stage were: 64.7%, 83.5% and 13.5% respectively. Similarly, at the digestion stage, the volatile solid, total solid and moisture content were: 54.1%, 22.6% and 74.4% respectively. Advancement of decomposition leads to gradual increasing pH value from 7.2 to 7.4, which indicates the stability of organic matter. The moisture content on a wet basis was initially 13.5%. This value latter increased to 74.4%. On the average, 15 kg of mixed substrates with 25 litres of impure water produced biogas within 25 days of digestion. The gas produced from mixed substrates became flammable with blue flame after 16 days of production, indicating that the ratio of methane gas generated with the three mixtures of fresh animal waste was higher than other gases produced.

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“…Renewable energy remains one of the best alternatives for sustainable energy development. According to (Babatola, 2008), ignorance of renewable energy technology has meant that most people in developing countries rely primarily on solid fuel like wood to meet their cooking and lighting needs. Methane is produced in environments with little or no oxygen by bacteria that feast on organic matter such as grasses and wood (Kawaguchi et al, 2006).…”

mentioning

confidence: 99%

Production of methane from maize cob fed termites

K¹,

Babatola²,

Lafe³

et al. 2019

Journal of Applied Sciences and Environmental Management

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Termites are detritivores, which means that by consuming decomposing organic matter they obtain nutrients. By feeding on cellulose matter, termites generate methane. Waste energy content offers good opportunities to generate low-cost and available energy. This can help increase energy access and reduce energy poverty in Africa. This work helps to determine the rate of gas production by termites when fed with maize cob. A simulated environment was created for Macrotermes Subhyhalinus Sp. of termites made with optically transparent polycarbonate material (plexiglas). Methane emission from termites' simulated environment was monitored with the use of a gas flow meter. The termites' production rate was highest at dry temperature 28.07 o C with RH of 88.30%, and 0.630µg/termite/day flow rate was recorded form their simulated laboratory environment. The cellulose in maize shaft/cob is in the native state and the chemical composition not inhibited by processing; this led to the relatively high consumption and overall production rate of termites when they fed on it because maize cob was easier to digest.

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Comparative Study of Biogas Yield Pattern in Some Animal and Household Wastes

Cited by 15 publications

References 0 publications

Design, fabrication and evaluation of bio-digester for generating bio-gas and bio-fertiliser for Auchi polytechnic demonstration farm

Design, fabrication and evaluation of bio-digester for generating bio-gas and bio-fertiliser for Auchi polytechnic demonstration farm

Development of a Batch-Type Biogas Digester Using a Combination of Cow Dung, Swine Dung and Poultry Dropping

Production of methane from maize cob fed termites

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