1. FIRST BULGARIAN INTEGRATED SYSTEM OF INSTALLATIONS AND FACILITIES FOR WASTE TREATMENT

4. INTEGRATED SYSTEM: ELEMENTS
PHASE 1: -Landfill for nonhazardous waste ‘Sadinata’ and a waste water treatment plant
-Installation for biological treatment of green and bio waste – ‘Khan Bogrov’
-Pilot project for separate waste collection in two regions of Sofia – ‘Ovcha Kupel’ and ‘Kremikovtsi’
PHASE 2: -Mechanical-Biological Waste Treatment Plant with production of RDF-fuel
PHASE 3: -WtE Installation for cogeneration and waste recovery with RDF-fuel (RDF fired CHP plant)

5. PHASE 1 : INSTALLATION FOR BIOLOGICAL TREATMENT OF GREEN AND BIO WASTE – ‘KHAN BOGROV’
In January 2014 the Installations for biological treatment of green and bio-waste was put in operation – producing compost and electricity from waste.
All green waste from the maintenance of the green system of Sofia Municipality is treated– branches, trees, grass, leaves collected from parks and public gardens along with food-waste from municipal institutions, kindergartens, restaurants (598 sites from 2017 г.).
For 2017:
8558 t bio waste treated
13927 t green waste treated
2109 MWh electricity produced
In 2014 those installations are first of a kind in Bulgaria.

6. PHASE 2: MECHANICAL-BIOLOGICAL WASTE TREATMENT PLANT WITH PRODUCTION OF RDF-FUEL
In September 2015 the Mechanical-Biological waste treatment plant was put in operation and as of 2016 it treats all domestic waste of Sofia Municipality. The average volume of mixed domestic solid waste in SM is 1200 t/daily.
WASTE TREATMENT PROCESSING:
Reception and initial separation of hazardous waste and bulky waste;
Optical and mechanical treatment aiming complete separation of recyclables – metal, different plastics, cardboards, glass;
Biological treatment, biological drying and production of high-quality RDF-fuel
The whole treatment process is completely automatized and controlled in real time through an integrated monitoring and a system for data base collection (SCADA).

8. LANDFILL DISPOSAL OF DOMESTIC WASTE –
LANDFILL DISPOSAL OF DOMESTIC WASTE – FROM 100% TO 16% IN ONLY 10 YEARS

9. Резултати от работата на Системата

11. PHASE 3:WtE INSTALLATION FOR COGENERATION AND WASTE RECOVERY WITH RDF-FUEL

12. ABOUT THE INSTALLATION: RDF fired CHP plant
The Installation completes the Integrated System for waste treatment.
The construction of the Installation is planed back in 2012 under the EU decision for the financial grants of Phase 2 – the Mechanical-Biological Waste Treatment Plant.
The planning of the WtE Installation is done by the Danish company Ramboll A/S with the support of EIB and EBRD.
With that project Sofia is applying for financial grants from the European Commission.
The technology chosen for the realization of the Project is in full compliance with BAT, which are the only ones to be financed by the Operational EU Programmes.
Expected year for putting in operation: 2023

13. PROCESSING WASTE-TO-ENERGY
Content slide, two columns with image. Image size: 11,36 cm x 10,68 cm or 429 x 404 pixels

14. BURNING TECHNOLOGY CHOSEN CONCEPT AND KEY ARGUMENTS
Moving grate (robust and most proven)
Horizontal boiler (better H&S and more power)
60 bar & 425 ºC Steam (power performance)
Semi-Wet FGT with condensation (simple, robust and low emissions)
SNCR DeNOX (low power consumption)
CHP production (higher power production)
Heat storage tank (higher avoided gas usage)
Energy Production: 21 MW power + 55 MW heat
Energy efficiency: 94% 14

15. BENEFITS OF THE CHOSEN TECHNOLOGY
Modern incineration technology
Above 450 plants in Europe in operation and plants are under construction
More than 2000 plants in operation worldwide
By far the most applied technology worldwide
In Denmark alone 3 similar plants have been commissioned in the last 5 years.
Combined heat & power production with flue gas condensation gives very high energy efficiency

16. FLUE GAS TREATMENT FLUE GAS TREATMENT CONCEPTS REVIEWED Dry systems
Dry, lime based
Dry, bi-carbonate based
Semidry/-wet systems
Semi-dry, lime based
Semi-wet, lime based
Wet flue gas treatment
NOx reduction approaches:
Selective Non Catalytic Reduction (SNCR)
Selective Catalytic Reduction (SCR)
Consultant conclusions:
Semi wet, lime based + SNCR are best
Best economical and financial solution
Emission levels considerably better than emission limits
Robust and still simple to operate
Expected emission far below European emission limits (IED)

17. KEY ENERGY BENEFITS
Project will produce power and heat ensuring a very high energy efficiency (total efficiency of 94 %)
Heat from project pushes heat from gas consuming units up in the heat off-take curve
The project will reduce Toplofikacia’s use of natural gas by 65 mill. Nm3 per year
The project will increase Toplofikacia’s power production by MWh/y
Gas-HOB
Gas-HOB
Gas-CHP
Gas-CHP
RDF-CHP

18. 18

19. SITE SELECTION 4+1 possible sites have been compared
At TTP Sofia
At the existing MBT plant
TTP Sofia is preferred due to:
The MBT plant site would require a new 21 km DH line:
Additional investment of about ~ 21 M€
Additional cost of heat loss and pump energy ~ 4 M€/y
Relatively low additional transport cost of the RDF to the CHP plant ~ M€/y
Risk of delay to project in the case of the MBT site (land needs status change etc.)
Synergy possibilities when the plant is located next to Toplofikacia’s existing facilities.

20. MAIN ADVANTAGES OF THE INSTALLATION
Less than 10% of landfill disposal
Lowers PM10 emissions from TTP Sofia with 6.2 t/y (9.6%)
Lowers CO emissions with 87,2 t/y (7%).
Generates 58 MW heating energy for households
Generates 20 MW electricity for households
High technological standards and upmost level of security
Replacement of the older generators from the TTP Sofia

21. FINANCIAL ADVANTAGES AND SAVINGS
Savings up to lv/ y from landfill disposal taxes which are expected to reach 95 lv/t in 2020
Natural gas savings up to Nm3.
Savings between 15 and euro from natural gas, replaced by the RDF-fuel
Savings from additional payments to cement plants – – lv/y
IF THE WtE INSTALLATION WAS ALREADY OPERATIONAL, TODAY THE PRICE FOR CENTRAL HEATING WOULD BE LOWER BY 6 %
(with all market variables incl).

22. FINANCIAL PARAMTERES OF THE PROJECT
Indicative investment cost of the project – €
OPE funds (EU + national cofunding) – €
SM financial contribution (incl. EIB loan) – €
EIB loan – € with the following parameters:
Duration: 19 years
Grace period: 4 years
Borrowing rate: 1.5%
Payment tranches: 5 tranches between – €

23. THANK YOU