Objectif To build and put into operation a sorting and composting plant for municipal waste mixed with depuration plant sludges, with the aim of producing 12000 Tons/yr of good quality agricultural compost.The innovation lies in the use of a simple low cost energy efficient technology,which can handle a large seasonal (summer-winter) variation in volume of waste to be treated. The expected indirect energy saving is 1042 TOE/yr and payback time, about 7 years. This project is particularly suitable for municipalities of 30000-70000 inhabitants sited in tourist areas.The Kalamata municipal solid wastes (MSW) have the following composition : 59% organic matter, 20% paper/cardboard, 6% plastics, 4% metal, 3% glass, 8% inerts.The capacity of the plant is 80 T of MSW + 7 T of sewage sludge (SS) with the possibility to increase this capacity to 120 T (MSW + SS) per day (two shifts); in this case the yearly quantity of MSW + SS processed is 26,400 Tons allowing a potential production of about 12,000 T/year of compost (220 days/y).The collection means convey the refuse to the MSW reception and storage area from which they are conveyed to the feeding hopper with dosage device. Then, a bag-opener is used for tearing the possible bags present in the refuse and a machine provides for a size-reduction of mostly the sole cellulosic and organic materials; Possible bulky materials are discharged and do not go on through the cycle. THis solution avoid the use of an hammer mill or equivalent machine, and consequently glass crumbling and pulverising, making the subsequent compost refining easier.After the bag tearing and size reduction stage, ferromagnetic metals are separated and transferred to be recovered in a collection box (with the possibility to be pressed to reduce the volume and consequently transportation costs).The organic and cellulosic materials are then conveyed in a rotary screen which separates two fractions : the over-size material from the under-size material; the first is sent to the sanitary landfill and the latter (70% of the entering refuse) passes to the curing area.The transformation of the organic fraction into compost takes place through a process activated by a forced-aeration system. The material put in heaps is aerated by means of special pipes located under them and connected with fans which allow an alternate time controlled blowing/sucking of the air through the heaps, monitored by the following parameters : medium temperature of the heaps, temperature of some caracteristics points, O2 excess into the heaps, %CO2, humidity. Special sensors detect these parameters and send the signals to a microprocessor which provides for the regulation of the capacity and of the air blowing and sucking time.By following such methodology, the process is carried out with simplicity and in thirty days, a product having quite good characteristics is obtained. But it must be pointed out that such a control is still more delicate and necessary when, before conveying the refuse to the curing area, the sewage sludges are mixed with organic fraction of MSW.The cured composted containing rejects and inerts (stones, glass, non-compostable materials) is collected from the curing area and sent to the refining line, where the possible compacted materials are crumbled, the greater size materials are screened to be eliminated and the remaining fraction refined into an separator (mainly for the remaining glass particles) to give a compost of good quality. Programme(s) ENG-ENALT 2C - Programme (EEC) of demonstration projects relating to the exploitation of alternative energy sources and to energy saving and the substitution of hydrocarbons, 1983-1985 Thème(s) 1.6 - COMPOST AND FERTILIZERS PRODUCTION Appel à propositions Data not available Régime de financement DEM - Demonstration contracts Coordinateur MUNICIPAL CORPORATION FOR REBUILDING OF KALAMATA Contribution de l’UE Aucune donnée Adresse THOUKIDIDOU STREET 2 24100 KALAMATA Grèce Voir sur la carte Coût total Aucune donnée
