1. DESL Experience-MSW WTE
Conversion Technologies
Presented at
‘Asia Energy Security Summit’
organised by IPPAI , India
Bangkok, March 01, 2013
Dr G C Datta Roy
CEO, Development Environergy Services Limited (DESL)
New Delhi

2. Presentation Outline
DESL in Waste-to-Energy
Critical technology issues
DESL experience
Key learning & conclusions
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3. DESL & Alternate Energy
Enabled energy Designed and
saving of approx Due Diligence
Engineered Designed and 400,000 LPD
200 MW in & Project
over 500 MW engineered solar water
commercial development
buildings,
of biomass 22 MW solid heating in
for 250 MW
industries and based power waste to industrial
of
municipal plants and energy plant processes
hydropower
facilities cogeneration
3 million tons of GHG emissions off-set
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Introducing DESL

4. DESL MSW WTE Project portfolio
Projects Commissioned
• 16 MW Incineration based, Continuous operation since Feb,
2012 -Delhi
Project under Commissioning
• 10 MW pyrolysis/reformation based, currently one module
operating-Pune
Project under installation
• 12 MW RDF based-Delhi
Feasibility Study
• 5 MW Biomethanation based-Jamshedpur

5. Key Technology Issues
MSW Charaterisation
• Physical
• Thermal
• Chemical
Fuel preparation technologies
Conversion technologies
• Biomethanation
• Combustion
• Gasification
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6. Physical & Thermal Characteristics
MSW Characterization
4500 100
GCV (kCal/kg)
4000 90
3500 80
VM, FC, TM & AC (%)
70
3000
60
2500
50
2000
40
1500
30
1000 20
500 10
0 0
GCV on as Received Basis Volatile Matter (VM) Fixed Carbon (FC)
Total Moisture (TM) Ash Content (AC)
Extremely wide variation-reasons for failure of many WTE plants in India
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7. Moisture Content
Wide Variation-Zonal & Seasonal
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8. Technology-MSW Quality Compliance
Technology Compatibility Restrictive/Harmful
Biomethanation Food wastes, green Non-paper fibres,
wastes, excrements, plastics, metals, glass,
paper, higher CN ratio inerts
Pyrolysis, gasification All fibres, Metals extremely
moisture<15%, harmful, inerts
consistency
RDF All fibres, low moistures Plastics particularly PVC,
inerts
Incineration Flexible PVC, inerts
PVC, moisture & inerts are the common problems-need for
preparatory technology; simple for incineration to highly
sophisticated for gasification
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9. Preparatory Devices-Fundamentals
Size reduction Receipt & handling Manual removal-recyclable
Screening
Density separation
Pre & post drying
Metal removal
Inert reduction Primary Shredder Removing metals
Trommel
Ballistic separator Secondary Shredder
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Cost ratio for different systems has been as high as 1:10

10. Drying
Hot Air Generator Dryer Finished RDF
Preparatory need different for different conversion technologies
RDF, a commercial fuel for many applications (Boilers, Kilns, pellets)
03/04/2013 10

11. Biomethanation
MSW Pre-processing
(Separation of non-biodegradable)
Add water Shredding & crushing
Add water Slurry preparation
Digester Dewatering
Heater Compost
Gas
gin
En
e
G
Lowest specific cost, garbage management practices,
compost market, segregation, land requirement 11

12. ArrowBio Biomethanation Project-Tel Aviv
Processing capacity-70000 TPA (250 TPD)
Electricity output-630 KW
Electricity export-370 KW
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13. Incineration
Storage, handling, homogenization &
feeding crane High capacity grab bucket
Remote operation of grab crane Furnace monitoring for feed control
Minimum investment on fuel preparation, most flexible, proven technology, 13
high cost of incinerator, higher chances of harmful pollution

14. New Technology-Gasification
2 7
14
Heater
Gas
Clean
3 6 8 Up
11
GE
Syngas G
Media Reformer
9 Steam
MSW
Hot gas WHR HAG
4 5
12 15
Pyrolyser
RDF MSW Pre-processing
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Char Comb 17 16
1 ustor Inert, Recyclable, Lichette
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15. Technology Evaluation-Gasification
Overall cycle efficiency of upto 2 times of other technologies, 3 commercial
plants (USA, Japan & India), high end technology
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16. India Gasification Plant under Commissioning
MSW preparatory system Dryer
Dry RDF conveyor Fuel silo Gasifier Flare tower
Engine generator
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17. Emerging Technologies
High temperature pyrolysis/cracking
Micro digesters/home systems
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18. DESL Learning & Conclusions
Parameters RDF Biometh Incinera Gasifica Remarks
anation tion tion
Output- 1100 175 1300 1600 Internal consumption high in
KW/100 TPD* RDF
CV of plastics not counted
Technology Matured Matured Matured Developi BM technology yet to find
status as fuel ng success in India-garbage quality
Land need Medium High Low Low Need for land for fuel
preparatory low in incineration
Low for power block in
gasification
Investment High Lowest Medium High Even at higher level, cost in
cost India is less than half/one third
global benchmark
Environmental Medium Medium High Low High risk perception for
concerns incineration technology
*Garbage GCV of 1500 kCal/Kg
DESL believes that all the technologies would have their
applications depending upon garbage quantity & quality, land
availability & societal willingness to pay for the services
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19. Thank You
G C Datta Roy
Chief Executive Officer
Development Environergy Services Limited
(Formerly Dalkia Energy Services Ltd)
# 819, 8th Floor, Antriksh Bhawan
22, Kasturba Gandhi Marg, New Delhi - 110001
Tel-+91 11 4079 1107 Fax-+91 11 4079 1101
Mob-+91 95829 40363
gdr@deslenergy.com
www.deslenergy.com
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