Low Cost Biogas Units Toward Sustainable Villages
Tunner or tubular type of bio-digester has been widely developed in many countries for producing a renewable clean gas fuel named biogas. This digester type only requires minimum maintenance and simple construction for ensuring its lower cost compared to other with similar capacity. Mostly, polyethy...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
UB Press
2010
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| Subjects: | |
| Online Access: | https://repository.ugm.ac.id/273384/1/Low%20Cost%20Biogas.pdf https://repository.ugm.ac.id/273384/2/20.jpeg |
| Summary: | Tunner or tubular type of bio-digester has been widely developed in many countries for producing a renewable clean gas fuel named biogas. This digester type only requires minimum maintenance and simple construction for ensuring its lower cost compared to other with similar capacity. Mostly, polyethylene (PE) plastic bag is used for construction materials of the tubular digesters. In this project, the tubular type has been constructed using 12' diameter PVC pipe for increasing the durability and safety. The performance of PVC digesters have been tested by measuring biogas production rate and CH4 concentration in the gas. COD and BOD drop between inlet and oylet sludge and also Nitrogen, Phosporus and Potassium (N, P, and K) concentration in the effluent sludge have been measured as well for examining the digester efficiency. Efforts to chance the rate of biogas formation and to improve the selectivity of methane formation over carbon dioxide have been conducted. Laboratory data showed that land fill leachate was potential as a rich additive to enchance the rate of biogas production and the selectivity of mtehane formation. However, leachate addition did not seem to shorten the hydrolysis and acidogenesis periods that took place 20 dyas prior to methanogenesis phase. Therefore, an effort to shorten hydrolysis and acidogenesis periods was tested by utiliizing cow ruminal liquid from slaughterhouse waste. The addition of cow ruminal liquid shortened the hydrolysis and acidogenesis period up to 7 days after the first filling of the biodigester. With the potential of utilizing landfill leachate and ruminal liquid as rate enchancer in biodigester, this low cost biodigester project does not only overcome the problem of domestic fuel shortage but also can eliminate enviromental burden caused by accumulating leachate and slaughterhouse wastes. |
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