Effect of organic municipal solid waste addition on wastewater treatment plant sludge composting

Bu çalışmada, evsel atıksu arıtma tesisi çamuru ile organik evsel katı atık(EKA)-evsel atıksu arıtma tesisi çamuru karışımı için havalı kompostlaştırma teknolojilerinin uygulanabilirliği ve evsel atıksu arıtma çamuru kompostlaştırılmasında organik EKA ilavesinin etkisinin ortaya konulması amaçlanmıştır. Havalı Kompostlaştırma, 180 l’lik statik reaktörlerde gerçekleştirilmiştir. Çalışma periyodu süresince sıcaklık, pH, uçucu katı madde, su muhtevası parametreleri izlenmiştir. Organik EKA-çamur karışımından elde edilen kompost kalitesi sadece çamurdan elde edilen komposttan yüksektir. Çalışma, her iki reaktörden oluşan ürünlerin park, bahçelerde gübre ve eski maden ocaklarının rehabilitasyonunda toprak ıslah malzemesi olarak kullanılabileceğini göstermiştir. Anahtar Kelimeler: Arıtma tesisi çamuru, evsel katı atık, havalı kompostlaştırma.In Turkey, a lot of organic solid wastes are produced in high quantities. Collection and disposal of these wastes cause important problems. A European Directive is being prepared to restrict landfills, especially for disposal of organic solid wastes. Biological treatments are the clearest alternative for the organic solid wastes. These technologies can maximise recycling and recovery of waste components. The objective of this study is to investigate applicability of aerobic composting technologies for wastewater treatment plant(WWTP) sludge, mixture of organic fraction of municipal solid waste (MSW) and WWTP sludge and the influence of addition organic fraction of MSW on WWTP sludge composting. Aerobic composting was performed in 180 l static vessels. Air was supplied with a compressor regulated using a rotameter passed through the reactors at a rate of 140 l/min. The solid wastes were unloaded from the reactor onto the floor, mixed and then loaded again on a weekly basis for homogenization. Temperatures, pH, volatile solids, moisture parameters were monitored during the experimental study. The quality of the composts produced with MSW-sludge mixture higher than sludge alone. The study has clearly shown that the products attained for both reactors can be utilized as a fertilizer in the parks, gardens and as a soil conditioner for the rehabilitation of old mines.Keywords: Wastewater treatment plant sludge, municipal solid waste, aerobic compostin