Effect of dissolved oxygen and temperature on macromolecular composition and PHB storage of activated sludge

Reyes, P; Urtubia, A.; Schiappacasse, MC; Chamy, R; Montalvo, S; Borja, R

Abstract

The macromolecular composition of activated sludge (lipids, intracellular proteins and intracellular polysaccharides) was studied together with its capacity to store macromolecules such as polyhydroxybutyrate (PHB) in a conventional activated sludge system fed with synthetic sewage water at an organic load rate of 1.0kg COD/(m(3)center dot d), varying the dissolved oxygen (DO) and temperature. Six DO concentrations (0.8, 1.0, 1.5, 2.0, 2.5 and 8mg/L) were studied at 20 degrees C with a sludge retention time (SRT) of 6days. In addition, four temperatures (10oC, 15oC, 20oC and 30oC) were assessed at constant DO (2mg/L) with 2days SRT in a second experimental run. The highest lipid content in the activated sludge was 95.6mg/g VSS, obtained at 30 degrees C, 2mg/L of DO and a SRT of 2days. The highest content of intracellular proteins in the activated sludge was 87.8mg/g VSS, obtained at 20 degrees C, 8mg/L of DO and a SRT of 6days. The highest content of intracellular polysaccharides in the activated sludge was 76.6mg/g VSS, which was achieved at 20 degrees C, a SRT of 6days and a wide range of DO. The activated sludge PHB storage was very low for all the conditions studied.

Más información

Título según WOS: Effect of dissolved oxygen and temperature on macromolecular composition and PHB storage of activated sludge
Título según SCOPUS: Effect of dissolved oxygen and temperature on macromolecular composition and PHB storage of activated sludge
Título de la Revista: JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
Volumen: 49
Número: 7
Editorial: TAYLOR & FRANCIS INC
Fecha de publicación: 2014
Página de inicio: 857
Página final: 862
Idioma: English
DOI:

10.1080/10934529.2014.882682

Notas: ISI, SCOPUS