Biodegradability of oily wastewater using rotating biological contactor combined with an external membrane

Journal of Environmental Health Science Engineering

Manouchehr Vossoughi¹  Iran Alemzadeh¹  Mahdieh Safa¹ 

[1] Chemical and petroleum engineering department, Sharif University of Technology, Azadi St, Tehran, Iran

关键词: Rotating biological contractor;    Oily wastewater;    Hybrid membrane bioreactor;    Biological treatment;   

Others  :  1164579
DOI  :  10.1186/s40201-014-0117-3

 received in 2012-08-14, accepted in 2014-08-11,  发布年份 2014

【 摘 要 】

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.

【 授权许可】

   
2014 Safa et al.; licensee BioMed Central Ltd.

【 图 表 】

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