Optimisation of SBR Systems in Treating Mono-Ethylene –Glycol Wastewaters

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Esmaili Hashemabadi, Zahra | 2012

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 43425 (06)
University: Sharif University of Technology
Department: Chemical and Petroleum Engineering
Advisor(s): Borghei, Mehdi
Abstract:
In the present study , operation of a laboratory scale sequencing batch reactor (SBR) was evaluated to treatment of synthetic wastewaters containing ethylene glycol. Studies carried out with a plexiglass bioreactor whith effective volume of 18 lit.Aeration was supplied via two air diffusers that set at the bottom of the reactor. Synthestic wastewater containing ethylene glycol and molasses as carbon source and other nutrient such as diammonium hydrogen phosphate as phosphor source and urea as nitrogen source for biological activities was composed at the laboratory. To optimization of this reactor three parameters – aeration time, chemical oxygen demand and sudden change in arganic loading were assessed. Efluent chemical oxygen demand, pH, mixed liquor suspended solids (MLSS), temperature and some times sluge volume index (SVI) to analyse the process were evaluated. The optimum COD removal was observed for 14 hour aeration time. Finally results were fitted by modified monod equation and kinetic parameters K and Ks were determined 2.3 (1/day) and 170 (mg/lit) respectively
Keywords:
Sequencing Batch Reactor (SBR) ; Ethylen Glycol ; Biological Treatment ; Chemical Oxygen Demand (COD)Removal Ratio

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