Hodnocení odpěňovačů v laboratorních podmínkách část I: fyzikálně chemické aspekty a biodegradabilita

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F05%3A00015705" target="_blank" >RIV/60461373:22320/05:00015705 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Lab-scale evaluation of antifoaming agents - part I: physico-chemical aspects and biodegradability

Popis výsledku v původním jazyce

Eleven antifoaming agents (AAs) were tested. Their effect upon the activated sludge process was examined in bench-scale sequencing batch reactors. Basic chemical parameters of the effluent quality (COD, forms of nitrogen, PO43-, pH, SS) and biological foam occurrence were determined. Some of the tested AAs caused higher effluent concentrations of COD. Process of nitrification was not affected; differences in nitrogen removal efficiencies were significant in three cases. The biodegradability was examinedby following methods: closed bottle test, respirometric test and CEC-test. The defoaming ability was tested on a mixture of surfactants and on biological foam. The defoamers based upon the ethoxylated methylesters of rapeseed oil showed the highest degree of degradation and the best defoaming ability at the same time.

Název v anglickém jazyce

Lab-scale evaluation of antifoaming agents - part I: physico-chemical aspects and biodegradability

Popis výsledku anglicky

Eleven antifoaming agents (AAs) were tested. Their effect upon the activated sludge process was examined in bench-scale sequencing batch reactors. Basic chemical parameters of the effluent quality (COD, forms of nitrogen, PO43-, pH, SS) and biological foam occurrence were determined. Some of the tested AAs caused higher effluent concentrations of COD. Process of nitrification was not affected; differences in nitrogen removal efficiencies were significant in three cases. The biodegradability was examinedby following methods: closed bottle test, respirometric test and CEC-test. The defoaming ability was tested on a mixture of surfactants and on biological foam. The defoamers based upon the ethoxylated methylesters of rapeseed oil showed the highest degree of degradation and the best defoaming ability at the same time.

Druh

O - Ostatní výsledky

CEP obor

DJ - Znečištění a kontrola vody

OECD FORD obor

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Projekt

<a href="/cs/project/GP203%2F02%2FP011" target="_blank" >GP203/02/P011: Biologická rozložitelnost látek ovlivňujících povrchové napětí vod</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2005

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů