Presentation on theme: "SENES Consultants Limited Waste to Energy Opportunities and Challenges Ganga River Basin Management Plan Stakeholders Meeting IIT Delhi 23 September 2011."— Presentation transcript:
SENES Consultants Limited Waste to Energy Opportunities and Challenges Ganga River Basin Management Plan Stakeholders Meeting IIT Delhi 23 September 2011 Murali Ganapathy Waste Management and Climate Change Group
SENES Consultants Limited Waste to Energy: Basics WTE is one type of waste management technique Most suitable for organic waste – solid and liquid containing high organics capable of decomposition Solid waste can be: MSW / garbage Industrial waste Processing waste Waste is converted to energy: electricity, steam, gaseous fuels
SENES Consultants Limited Waste to Energy: Advantages Volume and mass reduction: 60% to 90% Land demand for land filling is reduced Savings in overall waste transportation costs Potential for pollution mitigation Resource utilization: power, compost, organic fertilizer, gaseous fuels (syngas, H 2, biogas) Carbon emission reduction
Incineration Common commercial technology for waste management in developed countries. Over 4 lakh TPD of waste is being incinerated in about 600 plants in 35 countries. Estimated to be generating 10,000 MW power. Tried in Timarpur, Delhi – didn’t work due to high moisture/low calorific value of MSW
RDF Recovery of combustible particles from MSW through segregation, drying and shredding. Refuse Derived Fuel (RDF): fuel for Cement Kilns or can be combusted for generation of Power. Need for pollution control equipment required to control emissions.
Gasification Partial combustion in absence or restricted supply of air/O 2 to form combustible gases Combustible gases used for heat directly or for motive power/electricity through gas engines Promising and environmentally clean thermo-chemical process
SENES Consultants Limited Plasma Gasification Less polluting than combustion/incineration No SOX/NOX issues (no O 2 ) Toxic materials encapsulated: much safer to handle Highest efficiency of conversion High Costs and still in commercial demo stage
SENES Consultants Limited Anaerobic Digestion Biogas from biodegradable fraction of waste for fuel/power and organic manure Environmentally benign for segregated uniform solid or liquid wastes Many successful Indian applications (mostly small scale) Capital cost – financially competitive
SENES Consultants Limited Landfill Gas Capture u Anaerobic decomposition of waste in landfills produces landfill gas ( 40 - 60% CH4) u Landfill Gas can be captured, purified and utilized for power generation
SENES Consultants Limited Project Experience Plasco Energy – Waste to energy using plasma gasification; Anaerobic digestion of wastewater sludge and MSW organic components at Cancun, Mexico; Wastewater sludge and organic MSW at Campeche, Mexico; LFG at Puebla, Mexico and for GAIL at Delhi Ghazipur landfill. Waste gasification PPP proposed at Maldives; DBO at Belize for MSW; DBO at Guyana for Industrial waste Advantages Technologies Opportunities Challenges
SENES Consultants Limited Waste to Energy: Challenges Management of waste streams is difficult. Industrial discharge need to be controlled. Garbage disposal by public is an issue. Educating public and private sector is key. Need to assess capacity of ULB’s to manage and pay for the infrastructure or operations.