bio cng & microgrids for rural electrification 1

Bio-CNG & Microgrids for Rural

Electrificationrajunair@gogas.in

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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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