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Some Disadvantages of Biogas-
1. The product (biogas) value is rather low; this makes it an unattractive commercial activity.
2. The biogas yields are lower due to the dilute nature of substrates.
3. The process is not very attractive economically (as compared to other biofuels) on a large industrial scale.
4. Recombinant DNA technology and even strain improvement techniques can not be used to enhance the efficiency of the process.
5. The only improvement in the process, can be brought about by optimising the environmental conditions of the anaerobic digestion.
6. Biogas contains some gases as impurities, which are corrosive to the metal Paris of internal combustion engines.
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What is the conclusion for biogas?
One of the main features of the potential benefits is that they are only valid undercertain conditions, for example one has to consider what type of fuel was used prior tothe installation of the biogas unit. Biogas technology has the potential in theory todeliver considerable benefits to its users, but the situation in practice looks somewhat different as I have briefly touched upon in some cases
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suck balls and da answer to dat question is through animal wastes
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answer
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Removal of unwanted particles and gasses. Sulfur dioxide is one of the unwanted constituents of biogas. This is often removed by allowing the biogas to infiltrate a bed of iron filings. There the sulfur dioxide combines with the iron to make iron sulfate.
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