Utjecaj heterogenosti otpada na rezultate testa procjeđivanja

master's thesis

• Title (english): The impact of waste heterogeneity on the results of a leaching test
• Author: Karlo Kovačić
• Mentor: Aleksandra Anić Vučinić (mentor)
• Committee member: Sanja Kovač (predsjednik povjerenstva)
• Committee member: Aleksandra Anić Vučinić (član povjerenstva)
• Committee member: Ivana Grčić (član povjerenstva)
• Committee member: Vitomir Premur (član povjerenstva)
• Granter: University of Zagreb; Faculty of Geotechnical Engineering; Varaždin
• Defense date and country: 2024-07-19, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Interdisciplinary Technical Sciences; Environmental Engineering

Abstract

Tema diplomskog rada je prikaz utjecaja heterogenosti miješanog komunalnog otpada na dobivanje različitih rezultata provedbom testa procjeđivanja (eng. leaching test). Za potrebe testa koriste se uzorci iz funkcionalnih centara za gospodarenje otpadom Marišćina i Bikarac, gdje se dnevne količine ulaznog otpada mjere u tonama. Primjerice za CGO Marišćina dnevni kapacitet iznosi 350 t po danu, a za reprezentativni uzorak uzeta je masa od samo 90 g što može utjecati na točnost i reprezentativnost rezultata.
Da bi se ispitao utjecaj heterogenosti otpada na tako malen reprezentativni uzorak, provodi se dodatno uzorkovanje nasumičnim odabirom. Svi uzorci podvrgavaju se laboratorijskom testu procjeđivanja s ciljem dobivanja vrijednosti za propisane parametre. Dobivene vrijednosti reprezentativnog uzorka uspoređuju se s vrijednostima nasumično odabranih uzoraka. Na taj način definiraju se odstupanja od reprezentativnog uzorka koja su u radu izražena u postotcima.
Međusobnom usporedbom rezultata primijećena su velika odstupanja pojedenih parametara u odnosu na reprezentativan uzorak koji bi trebao sadržavati sva svojstva i karakteristike mase iz koje je uzet. Navedena odstupanja mogu se pripisati iznimnoj heterogenosti otpada i maloj masi korištenog uzorka. Rezultati pokazuju odstupanja koja variraju u rasponu od +100% do -250%, izuzev određenih parametara čija su odstupanja još veća s vrlo visokim postotnim vrijednostima. Sukladno rezultatima istraživanja zaključeno je kako reprezentativni uzorci ne prikazuju realna stanja.

Abstract (english)

This bachelor thesis shows the influence of heterogeneity of mixed municipal waste on obtaining different results by performing a leaching test. For the purposes of the leaching test, samples from the functional waste management centers Marišćina and Bikarac are used, where daily amounts of incoming waste are measured in tons. For example, for Marišćina, the daily capacity is 350 t per day, and for a representative sample a mass of only 90 g was taken, which can affect the accuracy and representativeness of the results.
In order to examine the impact of waste heterogeneity on such a small representative sample, additional random sampling is carried out. All samples are subjected to the laboratory leaching test with the aim of obtaining values for the prescribed parameters. The obtained values of the representative sample are compared with the values of randomly selected ones. After the deviations from the representative sample have been defined, they are expressed in percentages.
The results of the research were analyzed and mutually compared. The comparison shows large deviations of some parameters in relation to the representative sample which should contain all the properties and characteristics of the mass from which it was taken. The deviations can be attributed to the extreme heterogeneity of the waste and the small mass of the sample. The results show deviations that vary on average from +100% to -250%, except for certain parameters which have larger deviations with very high percentage values. According to the results of the research, it was concluded that the representative samples does not show the real situation.

• Keywords: sastav otpada; test procjeđivanja; reprezentativni uzorak.
• Keywords (english): waste composition; leaching test; representative sample
• Language: croatian
• URN:NBN: urn:nbn:hr:130:315345
• Study programme: Title: Geoenvironmental Engineering; specializations in: Geoenvironmental Engineering, Environmental Management, Water Management; Course: Environmental Management; Study programme type: university; Study level: graduate; Academic / professional title: sveučilišni/a magistar/magistra inženjer/inženjerka inženjerstva okoliša (sveučilišni/a magistar/magistra inženjer/inženjerka inženjerstva okoliša)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-09-04 08:46:46