Aerobno čiščenje kompostne vode v šaržnem reaktorju

diplomsko delo univerzitetnega študijskega programa

Sandra Zakošek (Author), Marjana Simonič (Mentor), Lidija Fras Zemljič (Co-mentor), Karli Udovičič (Co-mentor)

Abstract

Namen diplomskega dela je bil odstraniti vsebnost organskih snovi iz kompostne vode do največje možne mere s pomočjo aerobnih bakterij v šaržnem reaktorju. Diplomsko delo obsega preliminarne preskuse z razredčeno kompostno vodo in poskuse z odpadno kompostno vodo. V okviru eksperimentalnega dela smo spremljali fizikalno-kemijske parametre, s poudarkom na kemijski potrebi po kisiku (KPK). Cilj je bil znižati KPK pod 600 mg/L kisika, in s tem doseči vrednost, ki bi dovoljevala odvajanje kompostne vode v bližnjo malo čistilno napravo. Določili smo zaporedje in trajanje faz prepihovanja ter mešanja, preverili usedanje, znižanje parametrov po-predhodni mehanski filtraciji skozi peščeni filter in vpliv koncentracije aktivnega blata v SBR-reaktorju na učinkovitost zniževanja KPK kompostne vode. Preliminarni preskusi so pokazali, da je bilo mogoče vzdrževati nivo kisika nad 2 mg/L kisika samo z nenehnim prepihovanjem in hkratnim mešanjem z mešalom. Šele po petih dneh se je znižala KPK—vrednosti za več kot polovico, po 15-ih dneh pa smo dosegli 86 % učinkovitost znižanja KPK, kar pomeni končno vrednost KPK nad 6000 mg/L O2. Mehanska filtracija in usedanje malo prispevata k znižanju vrednosti KPK. Pri obdelavi naslednjega vzorca smo učinkovitost zniževanja KPK poskušali povečati z večjo koncentracijo aktivnega blata v reaktorju. Rezultati so pokazali, da koncentracija nad 10 mg/L zmanjšuje učinkovitost zniževanja vrednosti KPK.

Keywords

kompostna voda;aktivno blato;čiščenje vode;SBR;KPK;

Data

Language:	Slovenian
Year of publishing:	2014
Typology:	2.11 - Undergraduate Thesis
Organization:	UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher:	[S. Zakošek]
UDC:	66.081.6:629.161:628.32(043.2)
COBISS:	18247446
Views:	1376
Downloads:	196
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	AEROBIC TREATMENT OF COMPOST NATER IN BATCH REACTOR
Secondary abstract:	The purpose of the thesis was to remove the organic matter content from the compost water to the maximum extent possible, using aerobic bacteria in the batch reactor. It comprises preliminary experiments with diluted compost water and some tests with waste compost water. Within the experimental work we followed and monitored physico-chemical parametres, putting the stress on the chemical oxygen demand (COD). The aim was to reduce the COD under 600 mg/L O2. The sequence and duration of its aeration phase and stirring were determined. Furthermore, the settling was performed, as well as the reduction of parametres, after the mechanical filtration through sand filter. At the end, we defined the influence of the concentration of activated sludge in the SBR reactor on the effectiveness of compost water COD reduction. The preliminary experimets showed that the level of oxygen above 2 mg/L could only be kept with constant blowing and mixing with a stirrer at the same time. It was not until 5 days had passed that the COD was reduced for more than a half. After 15 days, 86% of reduction effectiveness was reached, which represents the final COD value above 6000 mg/L O2. The mechanical filtration and depositing do not contribute much to the COD reduction. When processing the next sample, we tried to stimulate the COD reduction effectiveness with a greater amount of activated sludge in the reactor. The results showed that the concentration above 10 mg/L reduces the effectiveness of the COD reduction.
Secondary keywords:	compost water;activated sludge;water treatment;SBR;COD;
URN:	URN:SI:UM:
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages:	XI, 60 str.
ID:	8730281