Effects of Methanol on the Treatability of Black Liquor using UASB Reactor

Authors

  • Arshad Ali Lecturer, College of Civil Engineering (MCE-NUST), Risalpur Cantt, NWFP
  • Hasim Nisar Hashmi Professor and Post-Graduate Director in the Department of Civil and Environmental Engineering, University of Engineering and Technology, Taxila
  • Intikhab A. Q. Senior-Instructor at College of Civil Engineering (MCE-NUST) Risalpur Cantt, NWFP

DOI:

https://doi.org/10.3126/hn.v6i0.4193

Keywords:

Black liquor, Methanol, UASB, Lignin, TOC

Abstract

This study was conducted on a laboratory scale UASB (upfow anaerobic sludge blanket) reactor, treating an actual pulping effluent at an organic loading rate and hydraulic retention time of 2.1 kg-COD/m3d and 44 hours, respectively. To investigate the impacts of methanol, it was subjected to the reactor with the feeding solution (substrate) in concentration ranging from 100 mgTOC/l to 700mgTOC/l. It was observed that the overall TOC and COD removal efficiency of the reactor was improved gradually from 36% and 34% to 57% and 55%, respectively, by increasing the concentration of methanol up to 600 mgTOC/l, but very little effects of methanol on the removal efficiency of lignin were observed. The lignin removal efficiency of the reactor slightly changed from 25% to 31%. The gas conversion rate was found to be improved slightly from 0.31[L-CH4/g-CODrem.day] to 0.34 [L-CH4/g-CODrem.day], with an average methane composition of 61%. Hence, addition of methanol to the reactor can improve the black liquor degradation up to certain extent.

Key words: Black liquor; Methanol; UASB; Lignin; TOC

DOI: 10.3126/hn.v6i0.4193

Hydro Nepal

Vol. 6, January 2010

Page: 42-46

Uploaded Date: 24 January, 2011

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Author Biography

Arshad Ali, Lecturer, College of Civil Engineering (MCE-NUST), Risalpur Cantt, NWFP


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How to Cite

Ali, A., Hashmi, H. N., & Q., I. A. (2011). Effects of Methanol on the Treatability of Black Liquor using UASB Reactor. Hydro Nepal: Journal of Water, Energy and Environment, 6, 42–46. https://doi.org/10.3126/hn.v6i0.4193

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