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Bambang Veriansyah
Department of Chemical Engineering Institut Teknologi Bandung JI. GanesaNo. 10, Bandung, INDONESIA
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry

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Production of Polyhvdroxyalkanoates from Synthetic Wastewater Using Sequencing Batch Reactors in On-Off Sequences Tjandra Setiadi; Herriyanto Ronny Sondjaja; Bambang Veriansyah
ASEAN Journal of Chemical Engineering Vol 4, No 1 (2004)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4288.881 KB) | DOI: 10.22146/ajche.50844

Abstract

The biosynthesis of polyhydroxyalkanoates (PHAs) using activated sludge as cultureorganism from tapioca synthetic wastewater has been studied in a 6L sequencing batch reactor (SBR). It was found that longer aeration time caused greater chemical oxygen demand (COD) reduction but did not achieve the maximum PHA-production rate. The application of on-off sequences, however, gave an acceptable PHA- productivity rate at 0.1033 gPHA L-1 h-1 and a high storage yield of up to 0.32 gPHNg biomass, although it caused a decrease in pH and affected sludge stability. The on-off variation also produced a higher valerate copolymer content, in the range of 16.44-22.48 % for Run 1 and of 13.09-14.09 % for Run 2, compared to the customary aerated-unaerated variations. The study indicates that the use of on-off SBR sequences may be suitable for obtaining high PHA-storage yields.
Co-Authors Herriyanto Ronny Sondjaja Setiadi, Tjandra