Waste management problem has raised a huge attention from many
authorities. Besides that, non-renewable energy depletion caused
awareness to the society on curbing the issue. Due to these current
issues, biogas production from solid waste was introduced. In this
work the method to produce the biogas was anaerobic digestion. It
is a digestion process of organic wastes without the presence of
oxygen. A lab scale anaerobic digester for batch mode was built.
Methane production from solid waste specifically food waste (green
waste, kitchen waste etc.) was done. The digestion process was done
by the aid of inoculum which was cow dung as the amount of
micro-organisms is high. A 350 liters plastic container of height
90 cm and diameter 70 cm was used as a bio-digester and biogas was
collected in tyre tubes. Methane tank was filled up to 70% of
volume by organic wastes. Methane production was monitored daily
and in detail on weekly basis. It was found that using a mixture of
cow dung and food waste retention period was 21 days. Gas started
to produce on 7th day. Amount of biogas obtained was 136 dm3. This
biogas digester may be used domestically as well as for the
demonstrative purposes.
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