Primjena plinskog plazma pražnjenja u proizvodnji PAW vode

undergraduate thesis

• Title (english): Application of gas plasma discharge in PAW production
• Author: Tomislava Grgić
• Mentor: Tomislava Vukušić (mentor)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; (Department of Food Engineering); (Laboratory for Food Processes Engineering); Zagreb
• Defense date and country: 2018-09-10, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Food Technology

Abstract

Svrha ovog rada bila je proizvesti i okarakterizirati plazma aktiviranu vodu (PAW) dobivenu primjenom visokonaponskog plazma pražnjenja. Korištenjem četiri radna plina (argon, kisik, dušik te zrak) pri atmosferskim uvjetima te varijacijama frekvencije (60, 90 i 120 Hz) i vremena tretmana (10 i 20 minuta) na destiliranoj vodi volumena 500 mL, provedena je usporedba fizikalno-kemijskih parametara dobivene PAW vode s obzirom na korišteni plin i vrijeme tretiranja. Dobivene su najviše vrijednosti pri frekvenciji od 120 Hz tijekom 20 minuta tretmana: električne provodljivosti (220,30 μ/cm) nakon tretmana plinskom plazmom sa zrakom, temperature (41,4°C) kada se kao radni plin koristi dušik te koncentracije vodikova peroksida (8,86 mg/L) kada se kao radni plin koristi kisik te zasićenosti kisikom (>300%). Kod ostala tri radna plina (N2, Ar i zrak) postotak zasićenosti kisikom se nakon 20 minuta pri 120 Hz smanjuje. Tijekom tretmana sa svim radnim plinovima osim s dušikom zabilježen je najveći pad pH vrijednosti pri 60 Hz. Dobiveni rezultati potvrđuju ovisnost fizikalno-kemijskih parametara PAW vode o primijenjenom radnom plinu, kao i buduću primjenu dobivene PAW vode.

Abstract (english)

The purpose of this study was to produce and characterize plasma activated water (PAW) produced by high-voltage plasma discharge. In research were used four working gases (argon, oxygen, nitrogen and air) at atmospheric conditions, with frequency variations of (60, 90, 120 Hz) and different treatment times (10 and 20 minutes) on 500 mL volume of distilled water. The highest values were achieved at frequency of 120 Hz during 20 minutes of treatment: electrical conductivity (220,30 μS/cm) after gas plasma treatment with air, temperature (41,4°C) with nitrogen as working gas, hydrogen peroxide concentration (8,86 mg/L) and oxygen saturation (>300%) were associated with oxygen discharge. Using other working gases (Ar, N2 and air) oxygen saturation reduces after 20 minutes at frequency of 120 Hz. During the treatment with all working gases, except nitrogen, the highest decrease in pH value occurs at frequency of 60. The obtained results confirm that physico-chemical properties of PAW are in dependence of applied working gas. In addition, plasma activated due to its characteristics may play a major role for various application in the future.

• Keywords: plinska plazma; plazmom aktivirana voda (PAW); fizikalno-kemijska svojstva
• Keywords (english): gas plasma; plasma activated water; physico-chemical properties
• Language: croatian
• URN:NBN: urn:nbn:hr:159:856918
• Study programme: Title: Food Technology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka prehrambene tehnologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka prehrambene tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2018-09-11 07:05:59