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

Paula Reyes, Alejandra Urtubia, María C. Schiappacasse, Rolando Chamy, Silvio Montalvo, Rafael Borja

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

8 Citas (Scopus)

Resumen

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 1.0 kg COD/(m3·d), varying the dissolved oxygen (DO) and temperature. Six DO concentrations (0.8, 1.0, 1.5, 2.0, 2.5 and 8 mg/L) were studied at 20°C with a sludge retention time (SRT) of 6 days. In addition, four temperatures (10C, 15C, 20C and 30C) were assessed at constant DO (2 mg/L) with 2 days SRT in a second experimental run. The highest lipid content in the activated sludge was 95.6 mg/g VSS, obtained at 30°C, 2 mg/L of DO and a SRT of 2 days. The highest content of intracellular proteins in the activated sludge was 87.8 mg/g VSS, obtained at 20°C, 8 mg/L of DO and a SRT of 6 days. The highest content of intracellular polysaccharides in the activated sludge was 76.6 mg/g VSS, which was achieved at 20°C, a SRT of 6 days and a wide range of DO. The activated sludge PHB storage was very low for all the conditions studied.

Idioma originalInglés
Páginas (desde-hasta)857-862
Número de páginas6
PublicaciónJournal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
Volumen49
N.º7
DOI
EstadoPublicada - 7 jun. 2014

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