Presentation on theme: "By Dr. Virendra K. Vijay Centre for Rural Development & Technology"— Presentation transcript:
1Status of Biogas in India, Government schemes and Biogas Enrichment & Bottling for Automobile ByDr. Virendra K. VijayCentre for Rural Development & TechnologyIndian Institute of Technology, DelhiHauz Khas, New Delhi, India
2IntroductionBiogas is an important renewable energy resource for rural areas in India.It is produced by anaerobic digestion of biological wastes.It is an environment friendly, clean, cheap and versatile fuel.Biogas generally comprise of % methane, % carbon dioxide, % hydrogen sulfide and traces of water vapour.Average calorific value of biogas is 20 MJ/m3 (4713 kcal/ m3).
3Biogas like Liquefied Petroleum Gas (LPG) cannot be liquefied under normal temperature and pressure. Critical temperature required for liquefaction of methane is oC at 4.71MPa pressure, therefore use of biogas is limited nearby the biogas plant.An estimate indicates that India has a potential of generating 6.38 X 1010 m3 of biogas from 980 million tones of cattle dung produced annually.The heat value of this gas amounts to 1.3 X 1012 MJ. In addition, 350 million tones of manure would also produce along with biogas.
4Biogas Technology Status India has been pioneering country in developing simple and easy to operate biogas plants.The government of India has been running National Biogas and Manure Management Program (NBMMP) for the welfare of the weaker section of the society.100% Biogas engines are in operation in the country.95% methane to make it suitable to be used as a transport fuel and for blending with natural gas where the gas grid is available.High density polyethylene (HDPE) based complete and portable family size biogas plants suitable for rural and semi urban area.
5Other urban waste projects include a 1 MW project based on cattle dung at Haebowal, Ludhiana; a 0.50 MW project for generation of power from biogas at sewage treatment plant at Surat, Gujarat; and a 150 kW pant for vegetable market and slaughter house waste and Vijaywada.Another 300 kW project based on vegetable market waste in under commissioning at Chennai. Besides, about 25 waste-to-energy projects with an aggregate capacity of about 30 MW from a variety of industrial wastes also been setup in the country.
6Ministry of New and Renewable Energy Bio-energy Technology Development GroupBiogas Programmes:National Biogas and Manure Management Programme (NBMMP).Biogas Based Distributed/Grid Power Generation Programme.Demonstration of Integrated Technology Package on Biogas-Fertilizer Plants (BGFP) for Generation, Purification/ Enrichment, Bottling and Piped Distribution of Biogas.Establishment of Business Model for Demonstration of an Integrated Technology Package for creation of smokeless villages using biogas/ bio-energy systems and meeting ‘Life-line Energy’ envisaged in ‘Integrated Energy Policy’
7Biogas- Fertilizer Plants: Most Potent tool to Handle Methane- a Green house gas Methane (Green house gas) released fromthree Landfills of Delhi during 2008: 74,000 tonnes (Indian Express )Effect of methane is higher thanfrom CO2 by: timesPercentage of methane in harmfulgreen house gas: %(approx.)Annual CO2 Emission Reductionfrom 1.5 lakh biogas plants: tonneExpected Annual CER from 1.50lakh biogas plants: Rs.75 lakh4/13/2017
8Provisions in Integrated Policy Report of Planning Commission Section 8.3 of Chapter on “Household Energy Security: Electricity and Clean Fuels for All” recommends to:“Provide lifeline entitlement of 30 units of electricity and 6 kg of LPG or equivalent amount of Kerosene for one or both lifeline energy needs through a system of smart/ debit cards with varying levels of direct cash support to targeted house holds……..”Provision of 6 kg of LPG may require about 138 million kg of LPG per month for 23 million BPL families.Biogas plant are one of the most suitable option for rural areas for supplying lifeline energy for cooking and lighting.1.5 to 2m3 capacity biogas plant per family can provide the recommended lifeline energy to BPL families.
9Biogas Programmes New Initiative for Technology Demonstration: Demonstration of Integrated Technology Package on Biogas-Fertilizer Plants (BGFP) for Generation, Purification/ Enrichment, Bottling and Piped Distribution of Biogas.Establishment of Business Model for Demonstration of an Integrated Technology Package for creation of smokeless villages using biogas/ bio-energy systems and meeting ‘Life-line Energy’ envisaged in ‘Integrated Energy Policy’
10National Biogas and Manure Management Programme (NBMMP) NPBD/ NBMMP Launched in 1981.Estimated potential of biogas plants: lakh Nos.Cumulative Biogas plants installed: lakh(34%)Envisaged Target for 11th Plan: 6.47 lakh plant(14 lakh m3)Installation in first two and halfyears of the 11th Plan: lakh plant (4.9 lakh m3)
11Approved CFA (in Rs.) under NBMMP for 11th Plan CategoryCFA (2-4 m3 Plant) (Rs.)CFA (1 m3 Plant)(Rs.)1. NER States14,700/-2. Notified hilly areas, J&K and Plain areas of Assam10,000/-9,000/-3. All other States8,000/-4,000/-4. Support for Training courses2000 – 67,500/-5. Turn key Job-feeRs.1500/-
12Biogas based Distributed/ Grid Power Generation Programme (BDPGP). Launched in January, 2006.Projects completed: Nos.( kW)Projects under Installation: 68 Nos. (549 kW)Total no. of projects sanctioned: 88 Nos.Total/ Aggregated capacity: About 1.16 MW
13Power generating capacity Biogas based Distributed/ Grid Power Generation Programme: Central Financial AssistancePower generating capacityBiogas plant capacityCFA/subsidy limited to the following ceiling or 40% of the cost of the system whichever is less.3 -20 kW25 cu. m to 85 cu.mRs.40,000 per kW>20 kW to 100 kWAny combination of above plants or alternate capacity /designRs.35,000 per kW>100 kW to 250 kWAny combination of above plants or alternate capacity / designRs.30,000 per kW4/13/201713
14Biogas based Distributed/ Grid Power Generation Programme Biogas Plant Capacity: cum/ dayPower Generation Capacity: KWEstimated Power Generationfrom 25 cum Plant: 30KWhr per day (3KW)from 100 cum Plant: KWhr per day (12 KW)Estimated No. of hours for meetingPower Requirement from 25 cum Plant: hrs.
15Biogas-fertilizer Plant Potential in India 1. Cattle Dung based biogas and bio-fertilizer Potential:Cattle population: Over 289 millionDung collected: million ton/day5kg per cattle per day)Estimated Biogas Generation: million m3/dayEstimated LPG equivalent: million kg/ dayBio-fertilizer: million ton/ day
16Biogas-fertilizer Plant Potential in India 2. Surplus crop residue/ biomass based potential:Surplus crop residue/ biomass: million ton/yrEstimated biogas generation: million m3/yr.Estimated LPG equivalent: million kg/ yr.Bio-fertilizer:3. De-oiled cake based biogas potential:(4,00,000 ha of Jatropha plantation)Estimated biogas generation: million m3/yr.Estimated LPG equivalent: million kg/ yr.Contd.
17Biogas-fertilizer Plant Potential in India 4. Poultry Litter based potential:Total Poultry population (1997): millionEstimated bird litter productionbird/ day): 25 million tons/ yr.Estimated Biogas production: 2983 million m3/yr.ltr/ kg):Estimated LPG equivalent: million kg/ yr.5. Kitchen waste based potential: considerable.
18Biogas-Fertilizer Plant Demonstration Projects: Objectives To harness near total potential of loose and leafy biomass waste, cattle dung and waste from kitchens and gardens in rural areas for installation of medium and large size biogas-fertilizer plants.Purification/ enrichment of bottling of biogas to replace PNG/ CNG/ LPG.To produce, upgrade and package high quality bio-fertilizer through vermi-composting and other technologies from digested slurry of BGFPTo establish self-sustainable entrepreneurial model for installation of such plants in villages, gaushalas, dairies, eating joints, restaurants, hostels and institutions.18
19BGFP Technology Demonstration Projects Proposed No. of Technology demonstration projects: 100 Nos.Capacity of BGFP: Multiples of 200, 500 and m3.Minimum economically sustainable plant size/ capacity: About 400 m3.Estimated cost of an Integrated m3 BGFP Project (cost will vary on plant size taken up): Rs lakh.Support technology demonstration.Better to follow commercio-cooperative approach for ensuring biomass feed material supply from beneficiaries.19
20Institutional arrangements for implementation of BGFP Technology Demonstration Projects It is proposed to implement the proposed BGFP demonstration projects through private and public sector companies, and leasing companies, rural entrepreneurs, cooperatives through IREDA, Banks and other financial institutions.To make ‘Biogas-fertilizer plant based Energy Infrastructure Initiative’ more economical, it would be useful for corporate bodies and entrepreneurs to bunch BGFPs in group of villages/ areas to avail of CDM benefits.20
21Financial Support for BGFP Projects Proposed financial support:Organization Percentage of Project CostMNRE support: %IREDA/ Bank Loan: %Promoter/ user agencycontribution: %21
22HDPE biogas plants by two private sector manufacturers installed under a demonstration project
2820 m3/day Capacity KVIC Biogas Plant installed at IIT Delhi
29Need for the Biogas Enrichment and Bottling Potential of biogas is not fully utilized and commercialized so far.For commercialization, its area of application may widen; from cooking fuel to vehicle fuel.For use as a vehicle fuel, it should be bottled like CNG.Before bottling, it should enriched in methane content from 55 % to 95 %; similar to CNG.
30CO2 & H2S Removal Processes from Biogas: S. No.MethodAdvantagesDisadvantages1.Absorption in WaterOne of the easiest and cheapest methods for CO2 removal. Recommended for rural application.Water pumping load is high.CO2 can not be recovered2.Absorption by ChemicalsThe chemical absorbents are more efficient in low pressure and can remove CO2 to low partial pressures in treated gas.Regeneration of the solvent requires a relatively high energy input. Disposal of by-product formed due to chemical reactions is a problem.3.Pressure Swing AdsorptionBy proper choice of the adsorbent, this process can remove CO2, H2S, moisture and other impurities.Adsorption is accomplished at high temperature and pressure. Regeneration is carried out by vacuum. It is a costly process.4.Membrane SeparationModular in nature and separate CO2 and CH4 effectively.High pressure requirement. The processing cost is also high.5.Cryogenic SeparationAllows recovery of pure component in the form of liquid, which can be transported convenientlyHigh cost involved makes it impractical for Biogas applications.6.Chemical ConversionExtremely high purity in the product gas.Process is extremely expensive and is not warranted in most Biogas applications.
31Among various methods of enrichment i. e Among various methods of enrichment i.e. Chemical absorption, PSA, membrane separation; Water scrubbing is found to be a suitable method for biogas enrichment in rural areas.It is simple, continuous and cheap process compared to other processes and also absorb H2S.Enriched biogas can further compress up to 20 MPa pressure for optimum gas storage in cylinders.
32Refining and Compression of Biogas Purification is carried out to enrich biogas by scrubbing off the unwanted components i.e. carbon dioxide (CO2) and hydrogen sulfide (H2S).It is essential to have more energy per unit volume of compressed biogas and to get rid of the corrosive effect of H2S.Various purification processes include absorption into water, absorption by chemical, pressure swing adsorption and membrane separation.One of the easiest, simplest and cheapest method is the use of pressurized water as an absorbent liquid.
33For economic viability of biogas bottling, its availability should be in large quantity. Plants linked with Dairy / Goshala (350 cattle or more), sewage treatment plants are suitable for this work.Biogas bottling may start new business venture in villages. Thus, open up new era of employment and income generation for village people.Biogas manure enhances the organic content of soil, thereby increases water holding capacity of soil.
34Design of Water Scrubbing System Water scrubbing method is found most suitable for biogas enrichment in rural areas.Water is good solvent for CO2.The solubility of CO2 in water is governed by variation in pressures and temperatures.
35System OperationRaw biogas is compressed up to 1.0 MPa pressure to enhance solubility of CO2 in water.Pressurized biogas is sent into bottom section of the scrubber.Packing material is used to enhance the contact time (interfacial area) between gas and water.Pressurized water is sprayed from top to absorb the CO2 from pressurized biogas.
36Process flow chart of biogas enrichment and compression system Biogas DigesterSingle Stage CompressorGas Storage Pressure VesselMoisture RemovalBiogas (CH4 CO2)Biogas ScrubberDissolved CO2 in WaterFlow MeterPumpWater TankMoisture FiltersPressure ReducersThree Stage Gas CompressorHigh Pressure Cylinders for Storage of Enriched GasWaterEnriched Biogas
38Biogas Enrichment and Bottling plant at Durgapura Jaipur
39Automotive Car and three wheeler Running on Enriched Biogas
40Further R&D Work Required for Biogas Development Biogas production using easily available local waste material preferably agricultural wastes.Development of new and low cost improved designs of biogas plants for large sizes.Development of low cost technology for separation of methane, CO2 and sulfur compounds from biogas for easy bottling of pure methane and to reduce the damages caused by S-compounds on machines using the biogas.
41The effect of bio-wash (liquid from digested slurry) on vegetables and crops. Design of kitchen waste biogas plant for restaurantsTesting of oil seed cake based biogas plant slurry for nutrient value and its effect on crop production
42ConclusionsIndia has second largest biogas programme in the world at rural and as well as urban levels.Many technologies/models have been successfully developed in India for biogas programme.There is need to develop a sustainable renewable energy programme on biogas for replacing petroleum products by utilization of biogas in the country.This will help in green energy technology and reducing green house gases emissions.
43Biogas is a potential renewable energy source for rural India and other developing countries. Biogas generation and subsequent bottling will cater the energy needs of villages, supply enriched manure and maintain village sanitation.The bottling system will work as a decentralize source of power with uninterrupted supply using local resources, generate ample opportunities for employment and income of the rural people.