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Petroleum Wastewater Treatment by Hybrid Membrane Bioreactor

Safa, Mahdieh | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42298 (06)
  4. University: Sharif University of Thechnology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Alemzadeh, Iran; Vossoughi, Manoochehr
  7. Abstract:
  8. Many chemicals exist in the petroleum wastewater, whose disposal into the environment can result in environmental pollutions and serious damages to the ecosystem.Since conventional treatment processes are not sufficient to achieve the water quality requirements, advanced treatment processes are required. In this study, Hybrid Membrane Bioreactor (HMBR), Rotating biological contactor with packing (RBCp) coupled with an external membrane, is used for synthetic petroleum wastewater treatment. Biodegradability of chemical oxygen demand (COD) and that of total petroleum hydrocarbon (TPH) were evaluated and compared for different hydraulic retention times (HRTs) and petroleum pollution concentration in RBCp and HMBR. Hence, the ratio of the TPH to molasses COD was enhanced from 0.2 to 0.8 in HRT=18 and 24 hr. Temperature, pH and dissolved oxygen were between 20-25 ºC, 6.5-7.5 and 2-3.5 mg/l, respectively. The results of the investigation showed that HMBR had higher treatment efficiency than the RBCp at all ratios and HRTs. The best TPH removal efficiency (99%) was obtained in TPH/COD=0.6 and HRT=24 hr. In both bioreactors, removal efficiencies were decreased for ratios above 0.6
  9. Keywords:
  10. Environment ; Hybrid Membrane Bioreactor (HMBR) ; Rotating Biological Contactor (RBC) ; Petroleum Wastewater ; Biological Treatment

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