Pretreatment of seawater for biodegradable organic content removal using membrane bioreactor

Visvanathan, Chettiyappan, Boonthanon, Natapol, Sathasivan, Arumugam and Jegatheesan, Veeriah 2002, Pretreatment of seawater for biodegradable organic content removal using membrane bioreactor, Desalination, vol. 153, no. 1-3, pp. 133-140, doi: 10.1016/S0011-9164(02)01114-1.

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Title Pretreatment of seawater for biodegradable organic content removal using membrane bioreactor
Author(s) Visvanathan, Chettiyappan
Boonthanon, Natapol
Sathasivan, Arumugam
Jegatheesan, Veeriah
Journal name Desalination
Volume number 153
Issue number 1-3
Start page 133
End page 140
Total pages 8
Publisher Elsevier BV
Place of publication Amsterdam, The Netherlands
Publication date 2002-02-10
ISSN 0011-9164
Keyword(s) biodegradable organic matter
membrane bioreactor
reverse osmosis
Summary Reverse osmosis (RO) is currently one of the most prevalent methods used for seawater desalination. During the past four decades, the research anddevelopment has reduced the energy consumption from about 20 to 4 kWh/m3, while improvements in membrane science has led to a 20-fold increase in the specific membrane flux. Nevertheless, research is still underway to reduce the operation and maintenance problems and thus improve the performance of RO systems. The most important maintenance problem associated with RO operation is the membrane fouling, especially biological fouling (biofouling). This work focuses on the aspects to eliminate biofouling in RO membranes, by adopting a proper pretreatment system. The experimental results revealed that fluidized bed biological granular activated carbon, at 15 min empty bed contact time (with dissolved organic carbon, DOC concentration of 6–8 mg/L) can be utilized effectively to remove nearly 100% biodegradable DOC from seawater. Continuous experiments of membrane bioreactor (MBR) have been conducted concomitantly to gain insight into the long-term effects of MBR on biodegradable organic content removal and biofouling control. The results show that MBR system produced better effluent with 78% DOC removal and quasi-total biodegradable DOC removal. Dissolved oxygen was not a limiting factor for the DOC degradation. Short-term experimental runs were conducted with RO membrane using both pretreated and non-pretreated seawater. The results showed that filtrate from MBR yielded the highest permeate flux improvement, which was approximately 300% compared with non-pretreated seawater.
Notes Presented at EuroMed 2002, Sharm El Sheikh, Egypt, May 4-6, 2002.
Language eng
DOI 10.1016/S0011-9164(02)01114-1
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
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