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Journal of Separation Science and Engineering
Vol. 3 , No. 1 , pp. 71-69
(MBR)
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.
mg/lCOD
mg/l
MLSS
pH
CODBOD
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MBR: membrane Bioreactor1- 2- MLSS: Mixed Liquor Suspended Solids 3- SRT: Solid Retention Time 4- Trussell
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FeSO4.7H2O
Viscous paraffin
Tween 80
KH2PO4
g sectionA
K2HPO4
g, NaNO3
g, NaCl g, yeast,
section B
extract
g
g ,(NH4)2SO4
sectionCMgSO4.7H2O
g section D
EDTA
g, MnSO4.H2O
g, NaCl g,
ZnSO4. H2O
g, CuSO4. H2O
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FeSO4. H2O
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g, Na2MoO4. H2O
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H3BO3
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sectionA
section B,C,D
pH
pH
pH
ccsection A
section B, C, Dcc
cc
gr
pH,
ccsection A
section B, C, Dcc
cc
gr
,
, pH=MLSS
COD
COD
CODClosed
titrametric method reflux
TOCSt. Method 5310B
pH pH
PC510
COD
Removal efficiency (%)
MLSS
(mg/l)
HRT
(hr)
COD
(mg/l)
Stage
pH
pH
pH
,
pH
PH Oil
concentration Oil
removal efficiency
Salinity
Oil concentration
Oil removal efficiency
COD
COD
,
COD
COD TOC
COD
.COD
CODTOC
COD
COD
COD
1-Permeate
mg/l
][
CODTOC
pH.
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Treatment of Oil Polluted Industrial Wastewater in a Sequence Batch Membrane Bioreactor
S. Abdollahi1, J.S. Moghaddas2, D. Mowla3
1- M.Sc. of Chemical Engineering, Sahand University of Technology. 2- Associate Professor of Transport Phenomena Research Centre, Chemical Engineering Faculty,
Sahand University of Technology. 3- Professor of Chemical Engineering, Shiraz University.
A R T I C L E I N F O A B S T R A C T
Article history:
Received 8 September 2010 Received in revised form 13 Feb. 2011 Accepted 12 June 2011
Membrane bioreactor (MBR) is a combination of one bioreactor system and one membrane system. Membrane bioreactors (MBR) have been widely used in wastewater treatment that requires high effluent quality, due to their important advantages over traditional technologies. In this research, the microorganisms with the ability to withstand in an environment with high salinity and oil were isolated from heavy crude oil in the south of Iran and biodegradation of oil pollutants studied. The adapted bacteria were cultivated later in the feed tank of a submerged hollow fiber MBR and biodegradation of oil polluted industrial wastewater with COD concentration of (700-3000mg/l) and MLSS concentration (4200 14000mg/l) have been studied.
The obtained results suggested that the existing membrane bioreactor have high performance in crude oil contaminated wastewater treatment, considering its microorganisms, environmental conditions (pH=6.7-8), temperature (28-30°C), high salinity (close to sea s level) and removal efficiency (80-93%).
All right reserved.
Key words:
Membrane Bioreactor microorganism oily pollutants high salinity
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