the Montale plant was the subject of a major industrial revamping by ladurner, which adapted the waste-to-energy incinerator to the best practices for the reference technology, allowing modern and effective operation. ladurner was also able to increase its own expertise through management of the structure, also obtaining iSo 14001 and EMAS certifications.

Waste-to-energy IncineratorMONTALE (Pistoia)

on a daily basis, the Montale plant treats the unsorted waste pro-duced by the three municipalities that own the structure (Agliana, Quarrata, and Montale, where it is located) as well as those in the nearby city of prato and a residual amount of what is produced by the city of Florence for a total of 75 tons/day of MSW (Municipal Solid Waste). besides the waste, the plant also burns 75 tons of rDF daily, fuel from waste produced in various plants in tuscany.

From the combustion of the MSW and the rDF about 23 tons/hour of steam at 41 bars are produced and, through its expansion in a multi-stage turbine, over 4 MWh of electricity are generated and then

completely distributed in the network— an electrical potential able to supply about 1,300 apartments.

in the next three years, plans for this system include obtaining iSo 14000 and EMAS certifications, structural adaptations to the new technical standards issued in order to optimize and make mana-gement of the analysers of the pollutants issued from the flue safer and more efficient (UNI 14181) and optimization of the plant energy management with reduction of light pollution and adaptation to the italian legislative Decree 46/2014 regarding the new ippC discipline (integrated pollution prevention and Control).

Plant characteristics and purpose

1. 2. 3.

ELECTRICITY

Flow chart

MSW / WEIGHING STORAGE PIT ROTARY KILN

STEAM TURBINE

FLUE GAS PURIFICATION

BOILER

GENERATOR

ASH STORAGE

FLUE

RECEIPT AND PRE-TREATMENT

Following weighing, the waste is unloaded in the wa-ste pit where it is mixed together.

WASTE INCINERATION the process consists of three combustion lines (only

two working at once) made up essentially of three rotary kilns for waste-to-energy incineration and two boilers for energy recovery. Combustion occurs in the furnaces. The flue gas coming from these imme-diately enters the boilers in the post-combustion unit area.

FLUE GAS TREATMENT

The flue gases generated by combustion are treated by a purification line (one per line) based on a dry pro-cess. It is made up of a bag filter with dosing of bicar-bonate and active carbon.

the nitrogen oxides are abated with doses of urea in the post-combustion chamber.

the heat energy released during combustion is en-hanced and converted first into mechanical energy and then into electrical energy. it is then sold to the public network after auto-consumption.

Project Data: input & output

Year ......................................................................2009technology used ....................................................rotary kilns co-current and counter current, SNCR, single stage bag filter with active car-

bon and bicarbonate dosingtype of waste treated .............................................MSW, rDF, iHW, expired medicines, sludge, and tyresplant capacity ........................................................53,000 t/year...............................................................................line 1: 13 MW — line 2: 5 MW — line 3: 10 MWnominal electrical power .........................................4.8 MW Electricity produced ................................................4.0 MWDust .......................................................................4%Ash .........................................................................18%

Description of the process

1.

2.

3.

Eboli (SA)

lA SpEziA (Sp)

bolzAno (bz)

FuSinA (VE)

bAri (bA)

MontAlE (piStoiA)

AlbAirAtE (Mi)

tortonA (Al)

CupEllo (CH)

SASSAri

©2015 – Laduner Ambiente Spavia Innsbruck 33, 39100 Bolzano ITALYTel. +39 0471 949 800Fax +39 0471 949805info@ladurner.itwww.ladurnerambiente.it

The Ladurner Ambiente SpA industrial group offers 360 degree solutions in the environmental field and in the production of renewable energy. It is involved in the design, construction and management of municipal solid waste treatment plants, RDF-SSF production plants, waste-to-energy incinerators and anaerobic digestion and composting plants.Through its various divisions, Ladurner is also involved in designing plants for the production of renewable energy from liquid and solid waste and from agricultural biomass, designing plants and machinery for the treatment of municipal and industrial wastewater and the reclamation of contaminated sites. Its continuous research for innovative technologies has made the group one of the major operators in the Italian waste and wastewater industry today, maintaining an active approach to the various topics and transforming waste into a resource for the future.