Mjerenje gustoće čestica otpada vodenim piknometrom

undergraduate thesis

• Title (english): Measurement of solid particle density with waste pycnometer
• Author: Dino Božić
• Mentor: Igor Petrović (mentor)
• Committee member: Sanja Kovač (predsjednik povjerenstva)
• Committee member: Igor Petrović (član povjerenstva)
• Committee member: Boris Kavur (član povjerenstva)
• Committee member: Mario Gazdek (član povjerenstva)
• Granter: University of Zagreb; Faculty of Geotechnical Engineering; Varaždin
• Defense date and country: 2021-09-16, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Interdisciplinary Technical Sciences; Environmental Engineering

Abstract

U ovom radu proučavala se gustoća čestica otpada i specifična težina čestica mehaničko-biološko obrađenog otpada iz Županijskog centra za gospodarenje otpadom Marišćina. U ovom istraživanju ručno su se izdvajale komponente otpada, da bi se dobila što točnija vrijednost gustoća čestica pojedinih komponenata otpada iz razloga što otpad mijenja svoja svojstva i nije homogen.
Postupak vodenog piknometra prilagođen je iz BS 1377: Part 2: 1990 standarda za određivanje gustoće čestica metodom vodenog piknometra.
Koristio se piknometar od 1000 mL, a uzorci su varirali ovisno o proučavanoj komponenti. Za papir i karton uzimani su reprezentativni uzorci od 31 g, za plastiku 14,7 g i za staklo 75,9 g. Plastika varira 13,52%, staklo 5,27%, a papir i karton 5,65% u odnosu na srednju vrijednost gustoće čestica za pojedinu komponentu.
Dobiveni rezultati ukazuju da je staklo u ovom istraživanju prirodno staklo, jer leži u rasponu vrijednosti za prirodno staklo iz literature, dok su plastika i papir imali nešto niže vrijednosti srednje specifične gustoće od onih iz literature. Tako je plastika u ovom istraživanju imala srednju specifičnu gustoću 10% manju nego HDPE i LDPE plastika, te 8,82% nižu nego PP plastika iz literature. Specifična gustoća papira iznosila je 7,5% manje od vrijednosti specifične gustoće utvrđene pregledom literature.

Abstract (english)

In this paper, the density of waste particles and the specific gravity of particles of mechanically and biologically treated waste from the waste management center Marišćina were studied. In this research, waste components were separated manually to obtain the most accurate value of individual waste components, since waste changes its properties and is not homogeneous.
The water pycnometer procedure was adapted from BS 1377: Part 2: 1990 standard for the determination of particle density with a simple Large water pycnometer (LWP) method.
A 1000 mL pycnometer was used and samples varied depending on the component which was studied. Representative samples of 31 g were taken for paper and cardboard, 14.7 g for plastic and 75.9 g for glass. Plastic varied 13.52%, glass 5.27%, and paper and cardboard 5.65% in relation to the mean particle density for each component.
The obtained results indicate that glass in this study is natural glass, because its values are within the values for natural glass which can be found in literature, while plastic and paper had slightly lower values of mean specific density than those found in literature. Thus, plastic in this study had a mean specific density 10% lower than HDPE and LDPE plastics, and 8,82% from PP plastics found in literature. The specific density of paper was 7,5% lower than the value of the specific density found in literature.

• Keywords: specifična gustoća čestica; mehaničko-biološka obrada (MBO); bioosušeni otpad; vodeni piknometar
• Keywords (english): specific gravity; MBT waste; biodried waste; LWP method
• Language: croatian
• URN:NBN: urn:nbn:hr:130:586170
• Study programme: Title: Environmental Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/ baccalaurea) inženjer/ inženjerka inženjerstva okoliša (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/ baccalaurea) inženjer/ inženjerka inženjerstva okoliša)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to authenticated users
• Created on: 2021-10-27 07:34:44