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Biogas Production in Africa: Benefit Potentials...
39,90 € *
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Biogas Production in Africa: Benefit Potentials of Cassava Biomass ab 39.9 € als Taschenbuch: . Aus dem Bereich: Bücher, Wissenschaft, Biologie,

Anbieter: hugendubel
Stand: 09.12.2019
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Biogas Production in Africa: Benefit Potentials...
39,90 € *
ggf. zzgl. Versand

Biogas Production in Africa: Benefit Potentials of Cassava Biomass ab 39.9 EURO

Anbieter: ebook.de
Stand: 09.12.2019
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Biogas Production using Geomembrane Plastic Dig...
51,90 CHF *
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Master's Thesis from the year 2008 in the subject Agrarian Studies, grade: Very Good, , course: Tropical Land Resources Management, language: English, abstract: Abstract The study was conducted in North Wollo, Mersa-Chekorsa village, Ethiopia in 2006/2007, where animal dung for biogas production is available. The overall objective of the study was to introduce economically feasible, technically acceptable and environmentally friendly biogas plant to the farming community and other potential users in Ethiopia. The research was carried on two types of biogas plants of 3m3 capacity (1) geo-membrane plastic (two single and two double layered) biogas plants constructed below and above the ground surface and (2) fixed-dome biogas plant. Each bio-digesters was fed with a mixture of 75Kg of cow-dung and 75Kg pure water at equal volume and proportion. Amount of gas and slurry were measured using calibrated biogas burner and weight balance respectively. The quality of the slurry (i.e. total-N and organic matter content) were analyzed in the laboratory using Kjeldahl and ash method respectively. The bio-digesters were compared after gas has completely produced at the end of 40 days of fermentation with respect to amount of gas and slurry produced, quality of slurry in terms of total-N and organic matter content. Economic analysis of the bio-digesters was carried out using cost-benefit analysis. The social aspect of using biomass and biogas technologies and environmental impact assessment of the new geo-membrane plastic biogas technology was also assessed. The emissions of CO2 and CH4 were computed by measuring the production of biogas in the two models of bio-digester. Fermented slurry contained larger nitrogen content than fresh cow dung in both models of bio-digester. The geo-membrane plastic biogas plant gave higher net benefit than fixed-dome biogas plant. So, from this, investment on geo-membrane plastic bio-digester is economically feasible. Environmental impact assessment of the technology was studied and found that 360.04 m3 of CO2 and 600.06 m3 CH4 was prevented from emitting in to the atmosphere and save 0.562 hectare of forest per year. Generally, it was found that, the geo-membrane cylindrical film bio-digester technology was found cheap and simple way to produce gas in the study area and it was recommended to introduce the technology into the rural areas having even and high temperature which is similar to the study area more preferably to an area having mean daily temperature greater than 20 OC. Key words:Geo-membrane ,fixed-dome bio-digester, biogas, quality of fermented slurry,economical feasibility

Anbieter: Orell Fuessli CH
Stand: 09.12.2019
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Biogas Production in Africa: Benefit Potentials...
61,90 CHF *
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Bioenergy production from agricultural crop biomass or residues has gained interest recently due to the escalating cost of fossil fuels and the need to mitigate global warming caused by increasing GHG emissions. Of all the different feed stocks used for bioenergy production in Africa, cassava biomass potentially offers multiple benefits for producing biofuels such as biogas. This book, therefore, highlights the bioenergy (biogas) potential of the crop in Africa. The basic agricultural properties of cassava were discussed including its high carbohydrate content and total dry matter. Its ability to thrive in all ecological zones with one of the best blue water-footprints especially in drought conditions and relatively low fertility soils. The crop therefore requires low agricultural input. The various pre-treatment techniques as well as the advantages and disadvantages of each technology for cassava biogas production were analysed. A holistic view on the highly publicised food vs. energy debate were provided. The book recommends cassava and its biomass as the next energy crop for bioenergy production and should be useful to future researchers and government policymakers in Africa.

Anbieter: Orell Fuessli CH
Stand: 09.12.2019
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Response of upland rice to different source of ...
79,90 CHF *
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The parameters, such as plant height, number of tillers per meter square, number of leaf per tiller, leaf area index, dry matter yield, yield attributes and yield of upland rice were observed highest in chemically fertilized treatment. The highest grain yield (2.337 Mg ha-1) from chemical fertilizer application was at par with fresh and decomposed biogas effluent, yielding 2.189 Mg ha-1 and 2.050 Mg ha-1 grain respectively. The gross return (Rs. 47.43 thousand ha-1) and net return (Rs. 25.00 thousand ha-1) were highest in chemical fertilizer. The benefit-cost ratio (BCR) was the highest (2.28) in fresh biogas effluent, which was almost similar to decomposed biogas effluent (2.18) and chemical fertilizer (2.11). The organic matter content (2.716 %), available phosphorus (42.86 kg ha-1), and available potassium (46.49 kg ha-1) were significantly higher in fresh biogas effluent than the other and that were at par with decomposed biogas effluent. The total nitrogen content was the highest (0.1353 %) in decomposed biogas effluent and was statistically at par with the rest of the treatments.

Anbieter: Orell Fuessli CH
Stand: 09.12.2019
Zum Angebot
Biogas Production using Geomembrane Plastic Dig...
35,00 € *
ggf. zzgl. Versand

Master's Thesis from the year 2008 in the subject Agrarian Studies, grade: Very Good, , course: Tropical Land Resources Management, language: English, abstract: Abstract The study was conducted in North Wollo, Mersa-Chekorsa village, Ethiopia in 2006/2007, where animal dung for biogas production is available. The overall objective of the study was to introduce economically feasible, technically acceptable and environmentally friendly biogas plant to the farming community and other potential users in Ethiopia. The research was carried on two types of biogas plants of 3m3 capacity (1) geo-membrane plastic (two single and two double layered) biogas plants constructed below and above the ground surface and (2) fixed-dome biogas plant. Each bio-digesters was fed with a mixture of 75Kg of cow-dung and 75Kg pure water at equal volume and proportion. Amount of gas and slurry were measured using calibrated biogas burner and weight balance respectively. The quality of the slurry (i.e. total-N and organic matter content) were analyzed in the laboratory using Kjeldahl and ash method respectively. The bio-digesters were compared after gas has completely produced at the end of 40 days of fermentation with respect to amount of gas and slurry produced, quality of slurry in terms of total-N and organic matter content. Economic analysis of the bio-digesters was carried out using cost-benefit analysis. The social aspect of using biomass and biogas technologies and environmental impact assessment of the new geo-membrane plastic biogas technology was also assessed. The emissions of CO2 and CH4 were computed by measuring the production of biogas in the two models of bio-digester. Fermented slurry contained larger nitrogen content than fresh cow dung in both models of bio-digester. The geo-membrane plastic biogas plant gave higher net benefit than fixed-dome biogas plant. So, from this, investment on geo-membrane plastic bio-digester is economically feasible. Environmental impact assessment of the technology was studied and found that 360.04 m3 of CO2 and 600.06 m3 CH4 was prevented from emitting in to the atmosphere and save 0.562 hectare of forest per year. Generally, it was found that, the geo-membrane cylindrical film bio-digester technology was found cheap and simple way to produce gas in the study area and it was recommended to introduce the technology into the rural areas having even and high temperature which is similar to the study area more preferably to an area having mean daily temperature greater than 20 OC. Key words:Geo-membrane ,fixed-dome bio-digester, biogas, quality of fermented slurry,economical feasibility

Anbieter: Thalia AT
Stand: 09.12.2019
Zum Angebot
Response of upland rice to different source of ...
43,99 € *
ggf. zzgl. Versand

The parameters, such as plant height, number of tillers per meter square, number of leaf per tiller, leaf area index, dry matter yield, yield attributes and yield of upland rice were observed highest in chemically fertilized treatment. The highest grain yield (2.337 Mg ha-1) from chemical fertilizer application was at par with fresh and decomposed biogas effluent, yielding 2.189 Mg ha-1 and 2.050 Mg ha-1 grain respectively. The gross return (Rs. 47.43 thousand ha-1) and net return (Rs. 25.00 thousand ha-1) were highest in chemical fertilizer. The benefit-cost ratio (BCR) was the highest (2.28) in fresh biogas effluent, which was almost similar to decomposed biogas effluent (2.18) and chemical fertilizer (2.11). The organic matter content (2.716 %), available phosphorus (42.86 kg ha-1), and available potassium (46.49 kg ha-1) were significantly higher in fresh biogas effluent than the other and that were at par with decomposed biogas effluent. The total nitrogen content was the highest (0.1353 %) in decomposed biogas effluent and was statistically at par with the rest of the treatments.

Anbieter: Thalia AT
Stand: 09.12.2019
Zum Angebot
Biogas Production in Africa: Benefit Potentials...
35,99 € *
ggf. zzgl. Versand

Bioenergy production from agricultural crop biomass or residues has gained interest recently due to the escalating cost of fossil fuels and the need to mitigate global warming caused by increasing GHG emissions. Of all the different feed stocks used for bioenergy production in Africa, cassava biomass potentially offers multiple benefits for producing biofuels such as biogas. This book, therefore, highlights the bioenergy (biogas) potential of the crop in Africa. The basic agricultural properties of cassava were discussed including its high carbohydrate content and total dry matter. Its ability to thrive in all ecological zones with one of the best blue water-footprints especially in drought conditions and relatively low fertility soils. The crop therefore requires low agricultural input. The various pre-treatment techniques as well as the advantages and disadvantages of each technology for cassava biogas production were analysed. A holistic view on the highly publicised food vs. energy debate were provided. The book recommends cassava and its biomass as the next energy crop for bioenergy production and should be useful to future researchers and government policymakers in Africa.

Anbieter: Thalia AT
Stand: 09.12.2019
Zum Angebot