Treatment of olive mill wastewater by rotating biological contactor reactor

Alemzadeh, I ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. Publisher: 2006
  3. Abstract:
  4. The removal performance of total poly phenols and orthodiphenols (o-diphenols) content in olive mill waste (OMW) was investigated with a three stages cross flow laboratory scale rotating biological contactor (RBC) in the present study. Due to high COD and other pollutant existed in the original OMW, before biological treatment of OMW by the RBC system, physico-chemical treatment was effected for COD and other pollutant reduction. Inoculation of RBC was effected by sludge from olive oil factory, and microbial acclimation was continued to 49 days and the system was adapted to about 300ppm of OMW poly phenols and o-diphenols. In biological treatment, effect of operating parameters such as hydraulic loading (HL) and influent COD were examined. The study of the physico-chemical treatment before biological treatment of OMW showed, that about 9.1% of total poly phenols, 3.2% of o-diphenols and 12% of COD were removed by physical treatment. The effect of chemical treatment by different coagulants, alum, bentonite and zeolite at different pH and concentrations showed that bentonite at pH 6.5 and 15g/1 resulted the best removal efficiency of 20% for poly phenols and o-diphenols. The experimental results in RBC system present that at low HL, significant removal efficiency was observed for poly phenols and o-diphenols, at the first stage, but with increasing HL, other stages took part in removal efficiency. Also, decreasing COD from 5000 to 2500 at different HL caused an increase in poly phenols and o-diphenols removal efficiency
  5. Keywords:
  6. Bioactivity ; Coagulation ; Microbial fuel cells ; pH effects ; Phenols ; Biological treatment ; Hydraulic loading (HL) ; Olive mill waste (OMW) ; Rotating biological contactor (RBC) ; Wastewater treatment
  7. Source: CHISA 2006 - 17th International Congress of Chemical and Process Engineering, Prague, 27 August 2006 through 31 August 2006 ; 2006 ; 8086059456 (ISBN); 9788086059457 (ISBN)