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Tackling colour issue of anaerobically-treated palm oil mill effluent using membrane technology

Ali Amat, N. A. and Tan, Y. H. and Lau, Woei Jye and Lai, G. S. and Ong, C. S. and Mohd. Mokhtar, Nadzirah and Abdullah Sani, Nur Aimie and Ismail, Ahmad Fauzi and Goh, Pei Sean and Chong, Kok Chung and Lai, S. O. (2015) Tackling colour issue of anaerobically-treated palm oil mill effluent using membrane technology. Journal Of Water Process Engineering, 8 . pp. 221-226. ISSN 2214-6296

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Official URL: http://dx.doi.org/10.1016/j.jwpe.2015.10.010

Abstract

In this work, the performances of membranes with different properties were evaluated for their capabilities in treating anaerobically-treated palm oil mill effluent (AT-POME). Unlike raw POME, AT-POME is the effluent that has been biologically treated to reduce mainly the organic compounds present in the effluent. The treated effluent however still demonstrates brownish by the time it is discharged to receiving water bodies. The samples treated by membranes were assessed with respect to two colour parameters, i.e. absorbance at 370nm wavelength and ADMI value. Other parameters also considered were total organic carbon (TOC) and total nitrogen (TN). Results showed that nanofiltration membrane (NF270) always demonstrated greater colour removal efficiencies in comparison to ultrafiltration membranes (UF 10kDa and UF 30kDa). The NF270 membrane achieved 97.4-97.9% colour removal compared to 72.4-75.4% and 48.1-50.5% shown by UF 10kDa and UF 30kDa, respectively. Further sample quality analyses revealed that NF membrane could achieve higher TOC and TN removal than those of UF membranes. Although NF membrane demonstrated excellent separation, its performance was compromised by low water flux (6.58L/m2h at 10bar). Since the treated effluent is not targeted for reuse, employing UF 10kDa membrane with reasonably good rejection rate coupled high water flux (9.66L/m2h at 5bar) is considered good enough to meet the discharged requirements. Further investigations have shown that UF 10kDa membrane is less susceptible to fouling when it is operated at low pressure and for the fouled membrane, chemical cleaning could be employed to retrieve water flux.

Item Type:Article
Uncontrolled Keywords:cleaning, colour, fouling, membrane, palm oil mill effluent
Subjects:A General Works
ID Code:58879
Deposited By: Haliza Zainal
Deposited On:04 Dec 2016 12:07
Last Modified:21 Feb 2017 16:51

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