Determination of the Removal Efficiency of Linear Alkyl Benzene Sulphonate Acids (LAS) in Fixed Bed Aeration Tank and Conventional Activated Sludge

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ID: 109824
2011
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Abstract
Linear Alkyl Benzene Sulphonate Acids (LAS) are one of the anionic surfactants that are produced and used in large quantities in different countries and find their way into the natural environment through sewer systems. These compounds may potentially cause environmental hazards in such surface waters as rivers. It is, therefore, necessary to remove as much of these compounds as possible by biological processes in wastewater treatment plants. For this purpose, four parallel biological reactors were constructed that used the conventional activated sludge and aeration tanks with fixed bed on the bench scale in order to evaluate the removal efficiency of LAS. The reactors were operated under conditions similar to domestic wastewater treatment plants. Parameters of interest were measured according to standard methods and ANOVA and T-test were used for the statistical analysis of the data. The results showed that aeration tanks with fixed beds yielded higher values of LAS and COD removal and air consumption compared to the conventional activated sludge system. It was shown that the two systems studied achieved LAS removal efficiencies of 96% and 94% for an influent LAS concentration of 5 mg/L. Further, it was found that the effluents from both systems satisfied water quality standards for discharge into surface waters (
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ebrahimi2011determination Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Ebrahimi, Asghar;Moghadas, Hossein Poor;Movahedian, Hossein;Amin, Mohammad Mehdi;Dastjerdi, Marziyeh Vahid;Hosseini, Elham;
Journal آب و فاضلاب
Year 2011
DOI
DOI not found
URL
http://www.wwjournal.ir/article_1145_e85bd0f520b33c6a54e6a1ed99d3c500.pdf
Keywords
Biology (General) Technology (General) Technology Science (General) social sciences (general) water supply for domestic and industrial purposes sewage collection and disposal systems. sewerage oceanography analytical chemistry

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