Ethylene Glycol Removal from Wastewater by Biological Means

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Ehsani Amree, Maziar | 2014

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 46361 (06)
University: Sharif University of Technology
Department: Chemical and Petroleum Engineering
Advisor(s): Borgheei, Mahdi
Abstract:
In this research, MBBR was used to study petrochemical and gas refinery industry's low strength wastewater COD removal for reuse purposes. Reactor's feed was synthesized based on data analysis conducted by fourth wastewater treatment facility operating in phases 6,7 and 8. Inlet COD was 70 mg/L and this COD was provided by different portions of Mono ethylene glycol and Tri ethylene glycol. COD removal was studied under 1, 2 and 3 hours hydraulic retention time. Reactor's feed was provided with COD ratio of ( 〖COD〗_MEG/〖COD〗_total ) 65%, 60% and 50%. For the first time, hybrid combination of activated sludge system and MBBR was carried out and recycle stream was used in this system. The recycle stream's effect was studied under recycle ratio of 0.5 and 0.7, Maximum removal was attained under 3 hours hydraulic retention time, COD ratio 65% mono ethylene glycol to 35% tri ethylene glycol and no recycle stream. Minimum removal was attained under HRT of 1 hours, COD ratio of 50% mono ethylene glycol to 50% tri ethylene glycol and recycle stream of 0.7
Keywords:
Ethylen Glycol ; Water Reuse ; Moving Bed Biofilm Reactor (MBBR) ; Biological Treatment ; Low Strength Wastewater

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