Download - Rdf Ozone Disinfection
RDF OZONE DISINFECTION
Ing. Roberto Palazzolo – SRF ENERGY S.r.l.
VENICE 2008 - 17/11/2008
RDF typical Production routes
Drying & Sanification through Bio-stabilization of MSW
MSW shreddingbio-stabilization
Mechanical Sorting / Refining
RDF
InertMetals
High CalorificWaste
High quality RDF
MSW Mechanical
Sorting / Refining
Aerobic stabilization of Organic fraction
Stabilized Organic Fraction
Inert MetalsRawRDF
Sanification and Drying on RDF
Ozone Sanification
PhysicalDrying
Dry & Sanitized RDF
High CalorificWaste
High quality RDF
Table 1
Molecular weight 48g/mole
Density relative to air 1.66
Specific weight at 0°C and 760 mm HG 2.143 kg/mc
Formation heat 34.5 kcal/mole
Boiling point -112°C (dark blue liquid)
Freezing point -193°C (dark red solid)
Ozone Properties and Production
Low voltage electrode
High voltage electrode
Dielectric
Discharge sectionO2 O2 + O3
Corona discharge
Experimental Equipments used in the study
Ozone testing unit
Pilot contact reactor
Shredder / RDF
Different O2 (i.e. O3) flowrates
Contact time: 12 min
Technology validation in the pilot plant run..........
Different contact time
O2 flowrate: 3 lt/ min
1E+04
1E+05
1E+06
1E+07
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
A@1 lO2/min 2E+06 2,40E+05 2,67E+05 2,79E+05
B@ 2 l O2/min 2E+06 2,40E+05 2,67E+05 2,79E+05
Eff.% A 79,6 77 76
Eff.% B 89,8 89 88
blank 24 48 72
% R
em
oval E
ffic
ien
cy
CF
U/g
Oxygen Flowrate 3 lt/min
1,00E+06
1,00E+07
1,00E+08
1,00E+09
1,00E+10
CF
U/g
Blank 1,31E+09 9,80E+08 1,50E+09 1,60E+09 1,40E+09
A - contact time 12 min 1,80E+06 2,50E+06 2,00E+06 2,20E+06 4,90E+06
B - contact time 8 min 5,10E+06 5,90E+06 6,40E+06 5,80E+06 9,30E+06
C - contact time 4 min 1,00E+07 1,10E+07 4,80E+07 5,50E+07 1,00E+08
0 24 48 72 110
24 h 48 h 72 h
hours
Project Structure
40% 60%
One of the most important waste management company in Italy
Technology company and RDF-HQ trader
.......The First industrial scale Plant will be operated by SRF Energy in the new Magliano (CN) high quality RDF plant
Upgrading to High quality RDF production
Landfill expansion with biogas energy recovery
Existing Dry fraction production plant :UNIECO is a 20 years concessionaire
General Overview
Upgrading to High quality RDF production
Landfill expansion with biogas energy recovery
Existing Dry fraction production plant :UNIECO is a 20 years concessionaire
General Overview
Upgrading to High quality RDF production
Landfill expansion with biogas energy recovery
Existing Dry fraction production plant :UNIECO is a 20 years concessionaire
General Overview
Magliano Project : 40,000 ton/y High quality RDF
Magliano Project : 40,000 ton/y High quality RDF
Post-processing of the Dry fraction from an existing MBT plantThe system is designed in order to meet strict specification for:
Size : < 20 mm (15 mm optional) , size is controlled by the bottom sieve
Odors and Biostabilization: Ozone technology from PRAXAIR is applied
Moisture: Physical drying technology will be applied
Calorific Value: Plastic adding by weight controller has been foreseen
Chlorine: Daily lab test on automatic collected samples will be done
Magliano Project : 40,000 ton/y High quality RDF
Ozone Reactor
RDF Capacity: 7,5 ton/h
O3 production: 10 kg/h
Ozone – RDF screw contactor
Ozone Destroyer
Magliano Project : 40,000 ton/y High quality RDF
Cogeneration of Heat and ElectricityThe plant will run using the electrical and heat energy produced by the landfill gas generator. The electricity produced will be 450 kWe, together with Heat up to 650 kWth.
electricity
Heat
HeatThe remaining required heat to dry RDF will be produced by a biomass boiler
Heat
CO2 Emitted = ZERO