1. Biomethanation Power Plants (BPP)
Sustainable Wealth Creation
Enerzea’s mission “To provide Eco-Friendly, Reliable, Economical and
and Sustainable Power, Combined Power & heat
Solutions par Excellence”
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2. BPP as a source of Renewable Energy
Enerzea Power Solution Pvt Ltd (EPSPL) provides solutions with high rate
Biomethanation process technology, that helps in capturing methane from a
feedstock of green biomass, poultry-litter, cow-dung and other biodegradable
sources
The biogas thus produced is 55-60% methane and 45-40% CO2 and is used
to generate power.
Biogas reduces global Green House Gas emissions:
• The methane that would have otherwise escaped into the atmosphere due
to decay of the organic feedstock is now captured and burnt to produce
power.
• Biomass replaces the use of conventional fossil fuels that would have
added to the concentration of CO2 in the atmosphere.
EPSPL provides a complete Turnkey/EPC solution to project developers to
set up Biomethanation power plants.
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3. Biomethanation Technology
Biomethanation is the process of producing biogas from organic wastes using
Anaerobic Digestion. There are two types of Anaerobic Digestion process:
Mesophilic Thermophilic
digestion digestion
Temperature Temperature
20-45ºC > 45ºC
pH=6.5-8.0 pH=6.5-8.0
Retention time of Retention time of
15 to 30 days 12 to 15 days
Requires lesser Requires greater
energy input and energy input and
lower cost of higher cost of
operation. operation.
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4. EPSPL’s Biomethanation Technology
EPSPL provides digesters that are Continuously Stirred tank
reactors operating in Mesophilic range.
Salient features of our Biomethanation plant are:
Mesophilic digestion process-
Anaerobic down flow Mesophilic fermentation.
Biomass feed- continuous type.
Fermentation at constant temperature & pH.
Continuous agitation of fermented slurry.
Effective scrubbing in order to achieve cleaner and safer biogas.
Power plant based on Otto cycle gas engine-generator to convert thermal energy in
biogas to electricity.
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6. Design Uniqueness of Digester
Our Digesters are designed for high rate digestion and operate in a
Mesophilic range with an optimum residence time of 20-24 days.
The digesters are continuously stirred (mechanical mixing) tank
reactors with submersible impellers (single or multiple mixers)
specially designed on the principles of non-Newtonian Rheology.
Enhanced agitation and mixing is achieved by recirculation of slurry back
into the digester using positive displacement pumps.
Efficient mixing technology forms the basis of a high-rate and high-yield
digestion process.
High-Rate digestion is characterized by higher loading rates of volatile solids
per m3 of the digester per day, a shorter retention time and a reduced size
of the digester and hence lower project cost (digester cost being a prime
cost component of the plant)
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7. Advantages of Efficient Mixing in Digester
Providing good
contact between
active biomass and
input feed.
Minimizes foaming Providing physical,
and formation of a chemical and
scum layer and biological uniformity
deposition of solids. within the digester.
Preventing pH and
temperature gradient Distributing the organics
and hence higher and diluting the
efficiency of conversion inhibitory substances
of organics to methane within the digester.
gas.
Utilizing the
digester volume
effectively.
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8. Biomethanation Power Plant (BPP) flowchart
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10. EPSPL’s’ Biomethanation modules-
Grid connected modules-
• 200 to 2000 kW
Captive power / piped biogas modules-
• 10kw (250cum BG/day)
to
• 2000kw(24000 cum BG/day)
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11. BPP Core Components
The Engine
The Digester
The Pump house
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12. BPP Peripheral Components
POWER HOUSE
Power plant Power exporting
Mixers in digester
Flexible roof Gas out let
Slurry heating coil
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13. BPP Peripheral Components
Special pumps with macerator/biocut, bio slurry mixing device
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14. BPP Peripheral Components
Biogas blower Decanter plant Decanter unit
Biogas scrubber Biogas flaring
Solid Biofertilizer
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15. Characteristics of 370 kw Grid Connected BPP
Substrate- Food waste, sanitation waste, Poultry Litter, Cow dung,
Green biomass etc (60 ton/day).
Biogas production capacity 4200 cum /day.
Power production capacity 8880 kwhr/day
The Biofertilizer generation per day up to 15 Ton
Solid digestate can also be converted into biofuel for combustion.
Steam generated from Waste heat of the Engine in a Heat Recovery
boiler which can be utilized for cold storage or other industrial
applications.
Biomethanation power plant load factor > 85%
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16. Characteristics of 370 kw Grid Connected BPP
Electrical efficiency is 37 - 40 % on full load.
Auxiliary power consumption of Biomethanation process 8-10%.
Digester capacity 3500-4000 CUM.
HRT 25-30 days.
Land required for plant and machinery 2 acres.
Time required for construction 6-8 months.
Approximate Project Cost-
o
INR 2, 10, 00,000. (Includes power generation and power evacuation).
o
INR 2, 70, 00,000. (Includes Gas Production Units & Accessories related as
mentioned in Scope of Supply).
Carbon credits can be earned up to 6000 CERs per year.
Life of plant 25 years.
Payback period is 4-5 years.
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17. Types of Biomass Feedstock
TYPE-I TYPE-II TYPE-III
AGRICULTURAL & ANIMAL WASTE &
FORESTRY WASTE MUNICIPAL SOLID WASTE INDUSTRIAL WASTE
Rice Straw Cow Dung Condensed Molasses Soluble
Cane Trash Buffalo Dung Palm Oil Secondary Sludge
Communist Weed Slaughter house waste Flour mill waste
Tree Leaves Poultry Litter Glucose Industry effluent
Glyriciaa Leaves Mandi waste ( Vegetable waste) Food processing waste
Tiger Grass Organic municipal solid waste DE-OILED CAKE
Palm Leaves Horse dung Jatropha Seeds
Grapes crops residue Food/Hotel waste Pongamia Seeds
Sunflower crops residue Goat litter Garcinia Seeds
Tapioca crops residue Mulla - Harhlu Seeds
Cashew fruits Dhoopa Seeds
Wheat stalk Rubber Seeds
Maze stalk Sunflower seeds
Elephant grass Sesame
Grains
ENERGY PLANTATIONS MARINE WASTE
Fodder Sorghum Fish Broth
Sweet Sorghum Dead Fish
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18. Biogas Composition
Volume Composition
Methane 55 to 65 %
Carbon dioxide 44 to 34 %
Nitrogen 1 to 2 %
Oxygen 0.1 to 0.5 %
Hydrogen Sulphide < 3000 mg/CUM
Ammonia 70 mg/CuM
Heat value (kwh/cum) 5.8 to 6.5
Other Features
Heat value in MJ/CUM 21.5
Explosive limit in vol-% of the air 6 to 12
Critical pressure in bar 75 to 89
Critical temperature in deg C 82.5
Density normal in mg/l 1.2
critical in mg/l 320
Density ratio to the air mg/l 0.94
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19. Benefits of Digester Residue ( Biofertilizer)
Contains micro and macronutrients, such as Nitrogen, Phosphorus
and Potassium and a fair amount of Manganese, Zinc, Copper and Iron which
increases the microbial activity.
Carbon as an energy source and other nutrients are provided to soil microbes, which
result in augmentation of their population. This helps in organic matter decomposition,
biological nitrogen fixation, solubilization of insoluble phosphates and availability of
plant micro-nutrient’s
There is improvement in soil structure, water holding capacity, drainage ban exchange
capacity, seed germination and reduction of soil erosion
Humid substances released as byproducts of soil microbial activity increase the
efficiency of bio and chemical fertilizers.
Proliferation of plant parasite, soil nematodes is checked
Resistance of plants to pest attack is increased
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20. BPP Rollout Parallel Processing
1. IDENTIFY REGION
2. IDENTIFY LAND , BIOMASS SURVEY
3. FINANCIAL FEASIBLITY
4.
5.
6.
SIGNING MOU
DPR PREPARATION & PROJECT FINANCING
PPA WITH ELECTRICITY BOARD
3-4 Months
7. STATUTORY APPROVALS FROM AGENCIES
8. TURNKEY/EPC CONTRACT
9. CDM CONTRACT
1.
2.
BIOMASS LAB ANALYSIS FOR GC
PROCURE COMPONENTS 6-8 Months
3. ERECT COMPONENTS & TRIAL RUN
4. PROVIDE STARTUP ASSISTANCE
5. O&M TILL PLANT STABILIZATION
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21. Scope of Work
ACTIVITY ENERZEA CLIENT
Feasibility Study of Project
Detailed Project Report preparation
Techno-Commercial support for financial closure
Design, Supervision of Erection , Procurement & Commissioning of BPP
Land leveling and civil construction
Trial runs/ dry runs for equipments.
Start-up and pre-Commissioning checks
O & M till plant stabilization (On Chargeable Basis).,
Identification & acquiring of land
Land Topography, soil analysis & water source of site,
Internal roads, Plant & Area lighting, Architectural treatment to area,
Power and Water for construction & operation of digester.
Biomass survey,/availability documentation & biomass supply contract
All statutory sanctioning / customs & duty clearance
Power purchase agreement
Supply of fresh water for making slurry during commissioning
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22. Scope of Work
Enerzea Scope ENERZEA CLIENT
Supply of biomass, chemicals, micronutrients, etc. during seeding and
Stabilization.
Accommodation & Essentials required for Site Personnel
Manpower training for 30 days from date of seeding (On Chargeable Basis).
Providing Laboratory Manual & Process manual
Site office with Tele-communication facility, Internet, Fax, etc.
Accommodation & local conveyance at site to Enerzea staff, during
Commissioning &supervision of work.
To carry out all works outside battery limits.
Maintain total confidentiality of all information drawings and technical know-
how.
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23. A one-stop shop for an end-to-end solution
Head Office-
Enerze Power Solution Pvt Ltd
# 1304, 2nd Floor, 3rd Stage
Yelhanka New Town
Bangalore 560 064, India
Tel: +91 – 80 – 2856 2066
Fax: +91 – 80 – 4224 2948
E-mail: murali@enerzea.com
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