Herambiente produces heat and power from the combustion of waste (considered a 51% biodegradable source), through ten waste-to-energy plants with a total installed electrical capacity of over 120 MW. Three of these waste-to-energy plants, moreover, recover thermal energy to supply district heating networks. The Ferrara district heating network, in addition to recovering heat from the waste-to-energy plant, also uses geothermal energy drawn from the wells in Casaglia which is, in fact, its main source.
Herambiente owns the biodigesters at Cà Baldacci (Rimini), Voltana di Lugo (Ravenna) and Cesena, each with a capacity of 1 MW. In addition, the biogas exploitation plants at 9 landfills are still active, as is the biomass plant managed in Faenza by Enomondo, 50% ownership of which is held by Herambiente.
The plants for recovering energy from treatment sludge (biogas) in Bologna, Cesena, Forlì and Savignano sul Rubicone (Forlì-Cesena) are also part of the integrated water system.
HeraSpa also operates four turboexpanders, located in Bologna, Forli, Ravenna and Ferrara, which generate electricity by exploiting the gas pressure differentials in the distribution network.
Heraspa has a 10% equity investment in Aloe, the owner of 8 photovoltaic solar facilities in the provinces of Bologna, Ferrara, Ravenna, Brescia and Macerata, for a total capacity of 7.2 MW, and holds a 33% stake in Ghirlandina Solare, owner of a 1 MW solar photovoltaic plant in Marzaglia (Modena), on land belonging to the Modena municipality. The solar photovoltaic systems installed in Heraspa’s offices and facilities of Bologna, Ferrara, Imola, Faenza, Cesena and Ravenna add a total of 150 kW besides those installed at the Herambiente plants of Mordano (BO), Voltana (RA), Coriano (RN), Pozzilli (IS), and Rimini add a further 1.7 MW. AcegasApsAmga operates three photovoltaic solar facilities with a total output exceeding 100 kW, a turboexpander that generates 2 MW, a natural gas cogenerator with a nominal electricity output of 500 kW and two biogas cogenerators installed at major treatment plants, that generate about 500 kW.
Lastly, of note is the new plant in S. Agata Bolognese for the production of energy from waste. The construction site was started in 2017. We expect to start the production of biomethane from the organic portion of separate waste collection by the end of 2018 (we estimate around 7.5 million m3 of methane gas/year).
In addition to the above renewable energy production plants, Hera also runs plants that generate low environmental impact energy (with nominal fuel utilization factors over 80%); among these, the 85 MW cogeneration plant at Imola stands out, as well as other smaller cogeneration and tri-generation electricity plants, for an additional total installed capacity of 27 MW.
|Renewable electric power||93||31%|
|Renewable electric power + cogeneration + turboexpanders||237||79%|
|total electric power||299||100%|
|Renewable thermal power||85||9%|
|Renewable thermal power + cogeneration and turboexpanders||206||22%|
|Total thermal power||919||100%|