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Updated: Apr 24, 2026

A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities
Published on: December 25, 2015
Biodegradability of oily wastewater using rotating biological contactor combined with an external membrane
Mahdieh Safa1, Iran Alemzadeh1, Manouchehr Vossoughi1
1Chemical and petroleum engineering department, Sharif University of Technology, Azadi St, Tehran, Iran.
Background:
A novel implementation of a hybrid membrane bioreactor (HMBR) has been studied in this paper. It is utilized as combination of rotating biological contractor (RBC) and an external membrane, as a new biological system for oily wastewater treatment.
Methods:
Chemical oxygen demand (COD) and total petroleum hydrocarbon (TPH) as factors of Biodegradability has been evaluated. They are both compared together for different hydraulic retention times (HRTs) and petroleum pollution concentrations in RBC and HMBR. The ratio of TPH to COD of Molasses has been varied between 0.2 to 0.8 at two HRTs of 18 and 24 hours while the temperature, pH and dissolved oxygen were kept in the range of 20-25°C, 6.5-7.5, and 2-3.5 mg/l, respectively.
Results:
The best TPH removal efficiency (99%) was observed in TPH/COD = 0.6 and HRT = 24 hr in HMBR and Removal efficiency was decreased in the ratios above 0.6 in both bioreactors.
Conclusions:
The experimental results showed that HMBR had higher treatment efficiency than RBC at all ratios and HRTs.
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