Experimental Study on the Efficiency of Moving Bed Biofilm Reactor in Treating Ethylene Glycol

, M.Sc. Thesis Sharif University of Technology Esmaeili Rad, Nasim (Author) ; Borghei, Mehdi (Supervisor) ; Vossoughi, Manoochehr (Supervisor)

Abstract

The removal of ethylene glycol, one of the most widely used antifreez, with moving bed biofilm reactor (MBBR) was studied. Beside of ethylene glycol, the synthetic wastewater contained molasses and other salts as nutrient source. The packings were composed of polyethylene and shaped like small cylinders with a surface area of 500 m2 per m3 bulk volume of carriers(KMT). The COD of the feed was adjusted by varying the ratio of ethylene glycol to molasses. The total COD was 1252.5, 1345 and 1500 mg/L. The resulted showed that when the biofilm grows on the packings and its thickness is good enough, the removal efficiency increased. The increase was attributed to higher concentration of biomass...

Development of a Multi Generation Energy System Based on Biotechnologies

, M.Sc. Thesis Sharif University of Technology Taheri, Neda (Author) ; Roshandel, Ramin (Supervisor)

Abstract

In recent years, the issue of sustainability in the energy systems has attracted the attention of energy researchers. Using fossil fuels in common energy conversion systems cause environmental pollution, declining reserves of fossil resources and increase their prices because of the scarcity of fossil resources. Therefore, achieving the goals of sustainability necessitate using high efficiency energy conversion technology. Bio-inspired energy systems are one of the main candidates to improve energy conversion systems. The main target of this study is developing an optimal multi-generation energy system model, dynamically. MFC, Septic tank and Algae culture are integrated and produced power,...

Experimental Study on the Efficiency of Memberane Bioreactor (MBR) in Removal of Trace Persistent Pollutants

, M.Sc. Thesis Sharif University of Technology Fouladi Ghale, Hosnie (Author) ; Borghei, Mahdi (Supervisor) ; Vosoughi, Manuchehr (Supervisor) ; Hesampour, Mehrdad (Supervisor)

Abstract

The removal of glyphosate, one of the most widely used herbicide, with membrane bioreactor (MBR) was studied. Beside of glyphosate, the synthetic wastewater contained molasses and other salts as nutrient source. The membrane was made from polypropylene and was immersed in the bioreactor. The COD of the feed was adjusted by varying the ratio of glyphosate to molasses. The total COD was 500, 750 and 1000 mg/L. The resulted showed that when the bioreactor coupled with membrane the removal efficiency increased. The increase was attributed to higher concentration of biomass or MLSS in the MBR. The average of MLSS in the MBR was 8500 mg/L while in bioreactor without cell recycling and in batch...