Average composition of fine fraction of municipal solid waste from WMC Kaštijun

Komunalni otpad vrlo je raznolika kategorija otpada. Može ovisiti o različitim čimbenicima poput tipa naselja, razine komunalne infrastrukture, standarda stanovništva, turističke sezone i slično. Na raznolikost komunalnog otpada utječe i sastav otpada. U komunalnom otpadu nalazi se organski i anorganski otpad, ali moguć je i opasan otpad. Organski otpad čine otpadci od hrane, papir i karton, plastična ambalaža, tekstil, koža, itd. Anorganski otpad čine staklo i razni ambalažni otpad. Komunalni se otpad, u CGO Kaštijun, podvrgava raznim postupcima obrade, a jedna od izlaznih frakcija jest sitna frakcija ostatnog otpada koja je pogodna za odlaganje na bioreaktorsko odlagalište otpada. Cilj ovog rada bio je utvrditi osnovne fizikalne parametre sitne frakcije otpada s CGO Kaštijun. Provedenim analizama pokazalo se da u uzetom uzorku sitne frakcije otpada najviše prevladava plastika i biorazgradivi otpad, te da nije pronađen opasni otpad. S inženjerskog aspekta može se istaknuti da će se zbog visokog udjela organske tvari mehanički parametri otpada s vremenom mijenjati, kao i da se mogu očekivati značajna slijeganja u tijelu odlagališta. Nadalje, zbog visokog udjela vlaknastih komponenata vjerojatno je primjenljiv Kolsch-ov model posmične čvrstoće otpada.Municipal waste is a highly diverse category of waste. It can depend on various factors such as a settlement type, the level of communal infrastructure, the living standard of population, a tourist season etc. The diversity of municipal waste is also affected by the composition of waste. Municipal waste mostly contains organic and inorganic waste, but hazardous waste can also be found. Organic waste consists of food waste, paper and cardboard, plastic packaging, textiles, leather etc. Inorganic waste consists of glass and various packaging waste. In WMC Kaštijun, municipal waste is subjected to various treatment procedures and one of the output fractions is a small fraction of residual waste which is suitable for disposal in a bioreactor landfill. The aim of this paper is to determine the basic physical parameters of the fine fraction of waste from WMC Kaštijun. The conducted analysis shows that in the sample taken from small waste fractions plastic and biodegradable waste predominate and that there is no hazardous waste. From an engineering point of view, it can be pointed out that due to the high content of organic matter, the mechanical parameters of the waste will change over time. Also, significant subsidence in the body of the landfill can be expected. Due to the high proportion of fibrous components, Kolsch’s shear strength model of waste is probably applicable