Comparison of denitrification at low temperature using encapsulated Paracoccus denitrificans, Pseudomonas fluorescens and mixed culture
Language English Country England, Great Britain Media print-electronic
Document type Comparative Study, Journal Article, Research Support, Non-U.S. Gov't
PubMed
21306891
DOI
10.1016/j.biortech.2011.01.024
PII: S0960-8524(11)00092-7
Knihovny.cz E-resources
- MeSH
- Water Purification methods MeSH
- Denitrification physiology MeSH
- Biological Oxygen Demand Analysis MeSH
- Cold Temperature * MeSH
- Waste Disposal, Fluid methods MeSH
- Paracoccus denitrificans metabolism MeSH
- Pseudomonas fluorescens metabolism MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Comparative Study MeSH
The aim of this work was to compare denitrification activity of three types of encapsulated biomass containing pure culture of Paracoccus denitrificans or Pseudomonas fluorescens or mixed culture of psychrophilic denitrifiers cultivated at 5 °C from activated sludge. The experiments were held with synthetic wastewater containing 50 mg L(-1) N-NO(3)(-) under the temperature 15, 10, 8 and 5 °C. Specific denitrification rates related to the weight of pellets and to the protein content were calculated and the temperature coefficients describing the dependence of denitrification rate on the temperature were determined. Although the mixed culture showed the highest denitrification rate at the temperatures below 10 °C, using of pellets containing pure culture is recommended as the mixed culture has slow growth rate and its activity at temperatures above 10 °C is very low.
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