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KTH, School of Industrial Engineering and Management (ITM), Industrial Ecology.
2011 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The Masters’ thesis work has been characterized by an approach to gain an insight into the municipal wastewater treatment for more efficient removal of COD and nutrients like Total Phosphorous and Total Nitrogen. The aim of this work was to evaluate a method to improve the wastewater treatment efficiency for removal of nutrients. The different objectives were to evaluate the use of magnesium chloride for the removal of COD, total Phosphorous and total Nitrogen from municipal wastewater and carry out alkaline hydrolysis of toilet paper to estimate if the toilet paper content can be reduced by natural decomposition during alkaline hydrolysis. The methodology used in this study was literature review and laboratory experiments. The study mainly focused on additional removal of COD, total Phosphorous and total Nitrogen from municipal wastewater using magnesium chloride. Several sets of experiments were carried out with different weighed samples of magnesium chloride to observe the percentage reduction of COD, total Phosphorous and total Nitrogen. Study results showed that magnesium chloride was a viable option due to its efficient removal at lower concentrations of input and economical aspects. Alkaline hydrolysis of toilet paper also revealed that the toilet paper readily dissoluted in sodium hydroxide solution at a pH of 12. Therefore, it was concluded that magnesium chloride was a suitable option to achieve efficient removal of nutrients and also toilet paper dissolute faster at higher pH values. Also, due to the increase in COD while alkaline hydrolysis; it was suggested that the toilet paper from alkaline hydrolysis could be a possible option to use the carbon source for total Nitrogen removal in wastewater treatment.

Place, publisher, year, edition, pages
2011. , 40 p.
Trita-IM, ISSN 1402-7615 ; 2011:26
Keyword [en]
COD, Total Phosphorous, Total Nitrogen, Removal, Magnesium chloride, Wastewater treatment, Alkaline hydrolysis, Toilet paper
National Category
Water Engineering
URN: urn:nbn:se:kth:diva-108238OAI: diva2:579493
Subject / course
Industrial Ecology
Educational program
Master of Science - Sustainable Technology
Available from: 2013-03-26 Created: 2012-12-20 Last updated: 2013-03-26Bibliographically approved

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