Linear Alkylbenzene Sulfonate concentration varies Daily, Weekly and Seasonaly in Pittsburg’s Wastewater, Kansas

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Research Paper 01/01/2019
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Linear Alkylbenzene Sulfonate concentration varies Daily, Weekly and Seasonaly in Pittsburg’s Wastewater, Kansas

Balsam Abdulaziz Alessa
J. Bio. Env. Sci.14( 1), 151-161, January 2019.
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Linear Alkyl Benzene Sulfonate (LAS) is a biodegradable surfactant, which is commonly utilized industrially and domestically. Concentrations of LAS had never been examined in Pittsburg’s Wastewater Treatment Plant because the National Pollution Discharge Elimination System permit does not specify any standard for LAS in Pittsburg’s wastewater. This study monitored influent and effluent LAS concentrations three times per day (10:00, 14:30, and 19:00), every day for 12 weeks February 24, 2014 – May 18, 2014). Concentrations were determined by the Methylene Blue Active Substances method. There was very little variation in the effluent concentrations which were much lower (one tenth) and more consistent (0.27 – 0.53mg/L) than those in the influent. LAS concentrations in influent were highly variable by the time of the day, day of the week, and week of the study period. Three weeks that were lower in influent LAS concentrations coincided with university activities (17 March – 22 April – 5 May). These three weeks were significantly different from almost all the other weeks but were not significantly different from each other. They coincided with certain university activities. College students may have a large impact on influent LAS concentrations because they make up 25% of Pittsburg’s population. The week of March 17 was spring break when many of the students were out of town, and the other two weeks were during final exams. During these two weeks, students probably are not doing much laundry. The effectiveness of Pittsburg’s Wastewater Treatment Plant was 90%, which is similar to others reported in the literature.


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