Compost production experience from municipal solid waste, in Istanbul

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TOC (Total Organic Carbon), TKN (Total Kjedhal Nitrojen), tP (total Phosporus), C/N (Carbon/Nitrogen ratio) contents and other properties of Municipal Solid Waste, in İstanbul are suitable for Compost Production. Compost is an extremely useful agent in agriculture, provides humous to soil, improves its porosity, workability, aeration and needless to say improves water absorption capacity. It also helps increasing the number of saprofit micro organisms and helps plants to get more of fertilizers. Another advantage of compost production is surely to decrease the volume of the waste to be placed in sanitary landfills. This means more longer service periods, which is extremely important for a huge metropole like İstanbul. The Compost plant, which is using aerobic fermentation process, was put in service in September 2001. It has a capasity of 700 tons per day in one shift. 700 tons of municipal waste per day screened through 80 mm sieve. Approximately 300 tons of material per day which passes through is sent to fermentation process. Out of the rest 400 tons per day, approximately 10% (40 tons) is sent to sorting by hand unit for resource recovery. Here, plastic, paper, cardboard and other material are regained. The rest 360 tons per day is sent to sanitary landfill for burrying. The material, which is suitable for composting, then screened through 10 mm sieve. The part which pass through this sieve is again sent to sanitary landfill because it may cause delay in fermentation process. The rest, which did not pass through 10 mm sieve, is taken into 8 fermentation units. 3 of this units are fully covered. Waste is spread within the units with 2 m. thickness. Humidity is controlled within these units, water is added if necessary and units are continuously aerated. In the first unit, after 3 days, tempeature increases up to 65-70 0C. Thus, pathogen micro organizms in the waste are got rid off. In every unit, solid waste inhabited a week. Hence, complete fermentation process is thus completed within 8 weeks. The row compost obtained is approximately 200 tons per day. After sieveing 100 tons of fresh compost is obtatined. It is than stored in an open air for maturation. Than it is used in parks, gardens, and green areas around streets and motorways in the vicinity of İstanbul Metropolitan Municipality. © 2006. International Scientific Conference SGEM.


6th International Scientific Conference on Modern Management of Mine Producing, Geology and Environmental protection, SGEM 2006 -- 12 June 2006 through 16 June 2006 -- Albena -- 101474

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6th International Scientific Conference on Modern Management of Mine Producing, Geology and Environmental protection, SGEM 2006

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