Chemical-Biological Phosphate Removal Using MBBR Bioreactors

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Hosseinpour, Mehdi | 2015

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 47282 (09)
University: Sharif University of Technology
Department: Civil Engineering
Advisor(s): Borgheei, Mahdi
Abstract:
Growing rate of eutrophication in receiving waters has made the enhancement of wastewater treatment plants to advanced methods of nutrients removal as necessary. Nitrogen and Phosphorus as the nutrients can reduce the quality of water and even make it unusable. Phosphorus is known to be one of the main reasons of eutrophication and creation of algal bloom. In this study, chemical-biological method for phosphate removal from the municipal wastewater is studied. Experiments are implemented for hydraulic retention times of 4, 8 and 16 hours, total intake concentration of phosphorus 7 ppm, COD 400 ppm and Nitrogen 25 ppm. Ferric Chloride as the precipitator chemical substance injected into the reactors with the dosage that created the concentrations of 40, 50, 60, 70, 80, 90, 100, 110 and 120 ppm in the reactor. The result of experiments revealed maximum phosphate removal percentage as 52% and 99% for biological and chemical-biological methods respectively. Optimum dosage of chemical injection and hydraulic retention time are found to be 110 ppm and 4 hours respectively; in this situation, Phosphate removal will be 96 and COD 75 percent
Keywords:
Biological Phosphorus Removal ; Moving Bed Biofilm Reactor (MBBR) ; Phosphorus Chemical Removal ; Ferric Chloride ; Phosphorus Precipitation

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