bio cng & microgrids for rural electrification 1
TRANSCRIPT
Agenda
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Current Situation
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• 30 million tonnes ofsolid waste
• 4,400 million cubicmeters of liquid waste
India
Potential in India
•Solid Waste: 1457 MW
•Liquid Waste: 226 MW
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Potential StatewiseWet waste from urban area, Banana Stem from farms, Vegetable Market area in Jalgaon (No :1 State Maharahtra)
Technology
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Urban Waste
Solid
Thermal
Incineration
Gasification
Pyrolysis
Biological
Land filling Composting Biomethanation
Biogas
Power
Liquid
Merits of Biomethanation
• Preservation of environment
• Residue used as soil conditioner
• Energy generation
• Carbon Credits
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Technical feasibility of Biomethanation Plant
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Parameters related with
Technical
Feasibility
Need for obtaining
waste with desired
composition
• Annual seasonal
variation in waste
composition.
• Identification of
points for collection
of waste.
• Source specific
collection of waste.
Ensuring process kinetics
• Digester Temperature & pH
• Carbon to Nitrogen ratio
• Maintenance of
COD/BOD values of the
reactor feed
Waste at processing
site
• Removal of non
biodegradables
• Removal of
binders like soil
particles, stones,
etc.
• Adjustment of
water content in
the feed to the
reactor.
Feedstock
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75%
25%
3 % of Global banana production
16 % of India’s banana production
66 % farmers involved in banana
farming
Advantage of banana stem
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•Bananas give very high biomass
production
•Easily available
•Available in all seasons
•Stems and leaves can be separated for
more value addition
Commercial viability
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• Input 20 tons
– Dry Matter 15 %
– Output Gas 7,200 m3
– Output Electricity 1.2 MW
• 96% pure methane
• Production cost
– Gas Rs.8.00 per kg Sell Rs.50 per kg
– 1 kg gas = 4 Units electricity
– 1 Unit = Rs.6.83 (Source: Solapur
power)
Return on Investment
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Sell only gas
ROI – 4 to 5 years
Electricity generation
ROI – 10 to 11 years
Target Customers
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– Khandesh Mall
– Auto Rickshaws running on petrol
– Power co- generation at Bhusawal
power plant
Case for Micro grids
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Extraction processing & Transport
Conversion
Distribution
Delivered to Customer
Electricity
Extraction processing & Transport
No Conversion
Distribution
Delivered to Customer
Bio CNG
32% efficient 92 % efficient
95 %
efficient
34%
efficient
32%
efficient 92 %
efficient
93 %
efficient
Conclusion
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•Technology is optimum at 36 C° suitable in a (sub)
tropical climate like India
• Biogas plant needs minimum maintenance costs and
can produce gas for at least 20 years without major
problems and re-investments
•The slurry / residue is a clean organic fertilizer that
potentially increases agricultural productivity
Appendix
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