Landfill leachate treatment using thermophilic membrane bioreactor

Visvanathan, C., Choudhary, M. K., Montalbo, M. T. and Jegatheesan, V. 2007, Landfill leachate treatment using thermophilic membrane bioreactor, Desalination, vol. 204, no. 1-3, pp. 8-16, doi: 10.1016/j.desal.2006.02.028.

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Title Landfill leachate treatment using thermophilic membrane bioreactor
Author(s) Visvanathan, C.
Choudhary, M. K.
Montalbo, M. T.
Jegatheesan, V.
Journal name Desalination
Volume number 204
Issue number 1-3
Start page 8
End page 16
Publisher Elsevier BV
Place of publication Amsterdam, The Netherlands
Publication date 2007-02-05
ISSN 0011-9164
Keyword(s) extra-cellular polymeric substances
landfill leachate
membrane bioreactor
Summary This study was undertaken to investigate the performance of aerobic thermophilic membrane bioreactor (MBR) treating raw landfill leachate from two landfill sites in Thailand (Pathumthani site and Ram Indra site). The leachates from these sites were mixed in different proportions to produce a BOD/COD ratio of 0.39, 0.57, and 0.65, which was investigated in 3 experimental runs. The COD, ammonia, and TKN composition of the mixed leachate was 12,000, 1700 and 1900 mg/L, respectively. BOD was supplemented with glucose and soy protein. The system was operated at 45 degrees C and at a hydraulic retention time (HRT) of 24 hrs. The membrane used was a ceramic membrane with an ‘‘outside-in’’ flow mode and consisted of 22 open fibres with an inner diameter of approximately 2 mm. The COD removal rate increased from an average value of 62–79% while ammonia removal efficiency decreased from 75 to 60% with gradual increase in BOD. Furthermore, a high BOD removal efficiency (97–99%) was also observed. This clearly indicates that thermophilic system is highly suitable for COD and BOD removal especially at elevated organic loading. However, the system does not favor high nitrogen content wastewaters as the ammonia removal efficiency dropped with increasing BOD/COD ratio. Similar trends were found in TKN analysis as well. However, this system could serve as a pretreatment in removing ammonia. The concentrations of soluble and bound extra-cellular polymeric substances (EPS) found in thermophilic MBR were higher when compared to the corresponding concentrations in a mesophilic MBR, which led to a higher rate of fouling in the thermophilic membrane.
Notes Presented at EuroMed 2006 conference on Desalination strategies in south Mediterranean countries : cooperation between Mediterranean countries of Europe and the southern rim of the Mediterranean, Montpellier, France, 21-25 May 2006.
Language eng
DOI 10.1016/j.desal.2006.02.028
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
Copyright notice ©2006, Elsevier B.V. All rights reserved.
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