Inhibition of Encapsulated Nitrite Oxidizing Bacteria by Short time Exposure to Hydroxylamine

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F16%3A43913059" target="_blank" >RIV/60461373:22320/16:43913059 - 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

Inhibition of Encapsulated Nitrite Oxidizing Bacteria by Short time Exposure to Hydroxylamine

Popis výsledku v původním jazyce

Partial nitrification brings oxygen demand of 25% lower than conventional nitrification. Next advantage can be lower chemical oxygen demand (COD) consumption during following denitrification which is appropriate for wastewater with high Namon concentration and low COD/N ratio. Nitration inhibition can become because of higher concentration of nitrification substrates, products and intermediates: ammonium, nitrite, nitrate and hydroxylamine (NH2OH). When suspended biomass is used, full nitration inhibition starts at N-NH2OH concentration of 0.42 mg/l. It is recommended to use N-NH2OH concentration between 0.15 and 2.33 mg/l. In the case of biomass immobilised on biofilters N-NH2OH concentration of 2.5-5.0 mg/l is needed. Immobilisation of biomass supports slowly growing microorganisms such as nitrification bacteria. One of immobilisation methods is an encapsulation which covers microorganisms in some stable material. Encapsulated biomass is protected against external conditions, is less sensitive on inhibitors presence, pH value or temperature changes. Technology LentiKat’s uses encapsulated biomass in PVA carriers which have a shape of lens.

Název v anglickém jazyce

Inhibition of Encapsulated Nitrite Oxidizing Bacteria by Short time Exposure to Hydroxylamine

Popis výsledku anglicky

Partial nitrification brings oxygen demand of 25% lower than conventional nitrification. Next advantage can be lower chemical oxygen demand (COD) consumption during following denitrification which is appropriate for wastewater with high Namon concentration and low COD/N ratio. Nitration inhibition can become because of higher concentration of nitrification substrates, products and intermediates: ammonium, nitrite, nitrate and hydroxylamine (NH2OH). When suspended biomass is used, full nitration inhibition starts at N-NH2OH concentration of 0.42 mg/l. It is recommended to use N-NH2OH concentration between 0.15 and 2.33 mg/l. In the case of biomass immobilised on biofilters N-NH2OH concentration of 2.5-5.0 mg/l is needed. Immobilisation of biomass supports slowly growing microorganisms such as nitrification bacteria. One of immobilisation methods is an encapsulation which covers microorganisms in some stable material. Encapsulated biomass is protected against external conditions, is less sensitive on inhibitors presence, pH value or temperature changes. Technology LentiKat’s uses encapsulated biomass in PVA carriers which have a shape of lens.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

<a href="/cs/project/FR-TI4%2F254" target="_blank" >FR-TI4/254: Kontejnerová technologie pro čištění průmyslových odpadních vod</a><br>

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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