magistrsko delo
Anja Brenčič (Author), Rok Fink (Reviewer), Martina Oder (Mentor)

Abstract

Uvod: V površinski vodi so lahko prisotne strupene snovi in nezaželeni mikroorganizmi, ki lahko negativno vplivajo na okolje in tudi na zdravje ljudi. V kmetijstvu se uporabljajo različna gnojila in sredstva za zatiranje škodljivcev ter plevelov, ki lahko prehajajo v stoječa vodna telesa, v morje ali ostajajo v tleh ter s tem ogrožajo rastline in živali v vodotokih. Namen: Namen raziskave je bil oceniti kemijsko in mikrobiološko stanje reke Ščavnice pred in po iztoku komunalne odpadne vode iz čistilnih naprav Ljutomer in Razkrižje, ter ugotoviti njun vpliv na vodotok. Metode dela: Spremljali smo mikrobiološko in kemijsko stanje reke Ščavnice na šestih vzorčevalnih mestih v obdobju enega leta. Vzorce smo analizirali na kemijske in mikrobiološke parametre. Za kemijske analize smo uporabljali spektrofotometrično metodo s kivetnimi testi in sistem za merjenje BPK5. Za ugotavljanje prisotnosti E. coli in enterokokov smo uporabili metodo membranske filtracije. Rezultati: Vrednosti izmerjenih parametrov nihajo glede na letni čas. Število mikroorganizmov je višje poleti v primerjavi z zimo, medtem ko za kemijske parametre tega ne moremo trditi, saj se vrednosti iz meseca v mesec precej razlikujejo. Najvišje vrednosti kemijskih parametrov so bile ugotovljene na vzorčevalnem mestu 4 in 6, ki sta za obema čistilnima napravama. Vpliv čistilne naprave Razkrižje na reko Ščavnico v primerjavi s čistilno napravo Ljutomer, je manjši, ampak gre za čistilno napravo, na katero je priključenih manj prebivalcev. Povečane vrednosti pri večini spremljanih parametrov smo potrdili tudi pri vzorcu 1, ki leži tik za akumulacijskim jezerom Gajševci. Pri vzorcu 3, ki se nahaja tik za kanalizacijskim razbremenilnikom v Ljutomeru, smo zaznali povečano število mikrobioloških parametrov in amonijaka. Razprava in zaključek: Na podlagi rezultatov smo ugotovili, da imata čistilni napravi Ljutomer in Razkrižje vpliv na kakovost reke Ščavnice, saj je kvaliteta reke po iztoku komunalne odpadne vode slabša v primerjavi z odseki pred iztokom s čistilne naprave. Pa vendar te vrednosti niso tako visoke, da bi lahko govorili o reki s slabo kakovostjo. Omeniti pa je potrebno še razpršene vire onesnaženja, predvsem kmetijstvo z emisijami dušika, ki prav tako slabšajo kakovost reke Ščavnice.

Keywords

magistrska dela;sanitarno inženirstvo;komunalne čistilne naprave;površinske vode;onesnaženje;kmetijstvo;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL ZF - University College of Health Studies
Publisher: [A. Brenčič]
UDC: 614
COBISS: 57309443 Link will open in a new window
Views: 473
Downloads: 89
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Other data

Secondary language: English
Secondary title: ǂThe ǂimpact of municipal wastewater on the Ščavnica river
Secondary abstract: Introduction: Surface water may contain toxic substances and pathogenic microorganisms, which can adversely affect the environment and human health. Various fertilisers and pesticides are often used in agriculture. These can pass into standing bodies of water, into the sea, or they may remain in the ground, thus endangering plants and animals in watercourses. Purpose: The purpose of this study was to assess the chemical and microbiological state of the Ščavnica river before and after the outflow of municipal wastewater from the Ljutomer and Razkrižje water treatment plants, and to determine their impact on the watercourse. Methodology: We monitored the microbiological and chemical parameters of the Ščavnica river at six sampling sites for one year. The samples were analysed based on chemical and microbiological parameters. We used the spectrophotometric method with cuvette tests and a BOD5 measurement system for the chemical analyses. In order to detect E. coli and enterococci, we used the method of membrane filtration. Results: The values of the parameters measured fluctuate from season to season. The number of microorganisms is higher in summer than in winter, however, this does not hold true for chemical parameters, as their values vary considerably from month to month. The highest values of chemical parameters were found at sampling points 4 and 6, which are located after both of the treatment plants. The Razkrižje treatment plant’s impact on the Ščavnica is smaller than that of the Ljutomer treatment plant, but the former also connects to fewer inhabitants. We also confirmed increased values in most of the monitored parameters in sample 1, which was taken just after the Gajševci accumulation lake. In sample 3, which was located right after the sewage discharger in Ljutomer, we detected an increase in the number of microbiological parameters and ammonia. Discussion and conclusion: Based on our results, we found that the Ljutomer and Razkrižje treatment plants affect the quality of the water in the Ščavnica river since the river's quality after the outflow of municipal wastewater is worse compared to the sections before the outflow from the treatment plant. However, these values are not high enough to conclude that this is a river of low quality. Here, we should also mention diffuse sources of pollution, especially agriculture with nitrogen emissions, which also decrease the quality of the Ščavnica river.
Secondary keywords: master's theses;sanitary engineering;municipal wastewater treatment plants;surface water;pollution;agriculture;
Type (COBISS): Master's thesis/paper
Study programme: 0
Thesis comment: Univ. v Ljubljani, Zdravstvena fak., Oddelek za sanitarno inženirstvo
Pages: 49 str., [7] str. pril.
ID: 12692795