Azote Removal in Submerged Fixed Bed Reactor by Modified Ludzack-Ettinger (MLE)Process

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Rajaei, Forough | 2014

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 46841 (06)
University: Sharif University of Technology
Department: Chemical and Petroleum Engineering
Advisor(s): Borgheei, Mahdi
Abstract:
Nitrogen compounds are becoming increasingly important in wastewater management, because of the many effects that nitrogenous material can have on the environment that need nitrogen removal. In this study, the performance of a submerged fixed bed reactor in nitrogen removal, constructed two anoxic and aerobic sections under Modified Ludzack-Ettinger process was investigated. Laboratory experiments were conducted at a constant COD concentration of 350 mg/lit, hydraulic retention times of 8, 12 and 18 hours and influent ammonia loading rate between 0.128 and 0.955 g NH3/m2.day. Nitrogen removal efficiency was obtained between 80.4 and 97.3%, and COD removal efficiency was achieved between 88.9 and 91.1 %. It was observed that increasing in influent ammonia loading led to higher nitrification rate while a decrease in hydraulic retention time cause decrease in nitrogen removal efficiency because of insufficient penetration of nutrients into biofilm thickness
Keywords:
Biological Treatment ; Nitrification ; Denitrification ; Modified Ludzack-Ettinger (MLF)Process ; Submersible Fixed Bed Reactor

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