1. Triple Effect of Reject to Power on Joburg’s Waste Vision
Klaus-Dieter Merzeder
Christof Group, Reject to Power
Austria

2. Global-Objectives for Waste Treatment
Starting Point and CoJ Waste
Management Strategy
Global-Objectives for Waste Treatment
Treatment of waste from households and industry is one of the main issues all over the world.
prevention
re-use
recycling
Even with modern waste collection, re-use and recycling systems, one will end up with a fraction of mixed residual waste, which needs to be treated in a sustainable way.
recovery
disposal

3. Typical Composition of Mixed
Residual Waste
MIXED RESIDUAL WASTE
Based on Eastern
European countries
Plastics: 14%
Organics: 50%
Glas: 4%
Paper/Cardboard: 18%
Metal: 4%
Miscellaneous: 10%

4. Waste Treatment Requirements
What do we expect from sustainable waste management ?
No methane emissions – no landfill of organic material
Recycling standards and closed loop to be considered
High profitability and short pay back
Optimized energy output and maximized energy utilization
Easy, low cost operation and maintenance friendly
Substitution of fossil energy sources

5. What is Reject to Power? The technology is a combination of:
Reject to Power is an incineration technology based on an impeller (“spinning wheel”), and a moving grate. Through that distribution the fuel particles fall on an existing glowing bed which ensures excellent burning conditions. Therefore the system is able to use fuels with a high moisture content and low heating value.
The technology is a combination of:
Flight Phase Drying / Combustion (Similar to Fluidized Bed Technology)
Grate Combustion

6. Introduction to the Innovative Combustion Technology
Spinning wheel fuel injection
Multi zones grate with separate air supplies  horizontal moving grate  defined combustion and burn out zone
Staged combustion by several air supplies  primary air  secondary air  primary and secondary recirculation air
Adiabatic combustion chamber
Combustion tower
2 sec. Retention Time
> 850°C
Secondary
air
Secondary air
Post combustion
Fuel supply by wheels
Recirculation
air
Combustion zone
Burnout zone
primary and recirculation air
Grate ash
Individually controlled air supply

7. Main Plant Components Boiler Flue gas treatment R2P Core unit
Additionally required systems
Fuel: treatment, transport and storage
Ash: transport and storage
Boiler
Flue gas treatment
R2P Core unit
Modular - concept from 5 to 30 MW
Tailored system

8. Plant and Fuel Capacity Ranges
Plant sizes
From 5 MW to 30+ MW thermal firing capacity
Modularized units
Steam
From 15 to 80 bar Steam Pressure
Saturated or super-heated steam
Range of residues
Lower Heating Value from kJ/kg
Maximum Water Content: 45%
Ash Melting Temperature: min °C

9. Case Study 1 R2P with steam turbine R2P Pros Moderate investment
High efficiency
Generation of electricity and steam
Simple installation and service
Cons
High specific investment of electric power generation
Low electric power output
No backup
R2P

10. Case Study 2 R2P Heating boiler R2P Pros Low investment Simple process
High efficiency
Cons
No power generation
Only for heating supply
Cooperation industrial and community
R2P

11. Case Study 3 R2P with coal boiler and steam turbine R2P Pros
High efficiency
Flexibility in fuels
Back up
Generation electricity and heat
Cons
Higher investment cost
Combination industry and community
Fossil
Fuel Boiler
R2P

12. Case Study 4 R2P boiler and CHP gas turbine R2P Pros
Tailored solution for industrial requirement
Generation electricity and heat
Cons
Highest investment
Sophisticated concept, 3 units
Lot of power generation based on natural gas
Industrial solution
Common European concept
R2P

13. Case Study Summary

14. Magic 3 R and Triple Effect
REDUCE
 Waste to landfill
By innovative process as
(separation at source)
Paper
Glas
Plastic etc.
Waste as fuel
Potential for significant Reduction
RECOVERY
Waste to Energy through incineration
Generating electric and heating energy
Partnering with industry and community as joined project
Ash is harmful, eluate free and without E-coli bacteria
RE-USE
Waste as fuel a social and environmental challenge
Prepare fuel for thermal treatment
Production of high quality fuel
Recycling of metals

15. Flow Diagram Utilisationrate of 99% Max. Utilisationrate of 98%
Example for cardboard production residues
Utilisationrate of 99%
Example for household waste
Max. Utilisationrate of 98%
with 86%
without 53%

16. References Saica Containerboard Partington Startup: 2012
Fuel Heat Capacity: 22 MW
Fuel: rejects and paper fibers from cardboard mill
RBB Böblingen Startup: 2008
Fuel Heat Capacity: 6,0 MW
Fuel: screening residues from wood chip fabrication
MM Karton Hirschwang Startup: 2005
Fuel Heat Capacity: 4,8 MW
Fuel: rejects, wood and bio sludge

17. Motivation for this innovative Technolgy
Best Practice Combustion Technology
Wide Range of Residues and Solid Fuels
Reliable and Proven Technology
Benefits for the CoJ
Reduce landfill significant
Re-use waste as energy source
Low investment by high pay back
Minimizing transport activities
Achieving all limits according to the European Waste Directive
Tailored plants for individual requirements
SA needs a Waste to Energy success story  lets start it !
is the solution for your requirements!

18. Christof Group
SERVICES OF THE GROUP
COMPETENCE & EXPERIENCE

19. Thank you for your attention.
Any questions?
Klaus-Dieter Merzeder
Christof Group, Reject to Power
Austria