Poly-beta-hydroxybutyrate (PHB) storage and degradation in activated sludge under aerobic conditions and at high ammonium concentration in wastewater

• Authors: A. Dobrzynska , I. Wojnowska-Baryla , K. Bernat
• Languages of publication: PL

Abstracts

EN

Numerous studies confirm poly-beta-hydroxybutyrate (PHB) synthesis by activated sludge under anoxic/aerobic conditions at high COD/N ratio in wastewater. In the presented experiment poly-beta-hydroxybutyrate (PHB) storage and degradation were observed in activated sludge at low COD/N ratio ? 3 in wastes. The researches were carried out in a single-stage system with activated sludge under constant oxygen supplied conditions. Readily biodegradable fraction increased in municipal wastewater through the addition of 0,2 g/dm3 acetate. Moreover, ammonium nitrogen was added to the wastes on the level of 50 mgNH4+/dm3. During the reaction time, organic carbon compounds oxidation by activated sludge and intracellular poly-beta-hydroxybutyrate (PHB) accumulation were observed. Under aerobic conditions and at low COD/N ratio ? 3 in wastewater, activated sludge used accumulated polymer as endogenous carbon source for denitrification. The obtained results show that poly-beta-hydroxybutyrate (PHB) synthesis is possible under fully aerobic conditions and at low COD/N ratio.

Keywords

EN

DENITRIFICATION; POLY-BETA-HYDROXYBUTYRATE; SLUDGE; STORAGE

Discipline

• BIOTECHNOLOGY: BIOTECHNOLOGY

• Publisher: Committee of Biotechnology, Polish Academy of Sciences
• Journal: Biotechnologia
• Year: 2005
• Issue: 1
• Pages: 183-193

Contributors

author

A. Dobrzynska

author

I. Wojnowska-Baryla

author

K. Bernat

• Document Type: ARTICLE
• Publication order reference: Adriana Dobrzynska, Katedra Biotechnologii w Ochronie Srodowiska, Uniwersytet Warminsko-Mazurski, 10-957 Olsztyn-Kortowo, Poland