Enhancement of the submerged membrane electro-bioreactor (SMEBR) for nutrient removal and membrane fouling control.
PhD thesis, Concordia University.
- Accepted Version
Enhancement of the submerged membrane electro-bioreactor (SMEBR) for nutrient removal and membrane fouling control
Sharif Ibeid, Ph.D.
Concordia University, 2011
A submerged membrane electro bioreactor (SMEBR) to enhance effluent quality and to reduce membrane fouling was patented by Elektorowicz et al (2009). In this system, activated sludge biological treatment, membrane filtration and electrokinetics are working together in one hybrid unit. The first objective of this research aimed to remove the major unwanted nutrients (Phosphorus and Nitrogen) in addition to the carbon in one single electro-bioreactor unit. The second objective was to investigate the relationship between the electrical input parameters (voltage gradient, current density and exposure mode) on sludge characteristics and therefore membrane fouling. This study consists of three phases: Phase 1 (batch tests), Phase 2 (lab-scale continuous flow) and Phase 3 (pilot-scale continuous flow). The results showed that the direct current (DC) field of medium current density (15 to 25 A/m2) has the potential to substantially improve sludge characteristics in terms of better dewaterability and high removal of soluble microbial products (SMP) and organic colloids. However, the electrical inputs should be selected based on the concentration of the mixed liquor suspended solids (MLSS). Subsequently, a high reduction of membrane fouling was obtained. The degree of membrane fouling reduction was ranging between 1 to 5 times based on the concentration of soluble microbial products (SMP) and the volatile suspended solids (VSS). This study demonstrated substantial removal efficiencies of nutrients up to more than 95% for carbon, 99% for phosphorus and 97% for nitrogen. However, the removal efficiency of nitrogen was found to be highly influenced by the temperature and the C/N ratio. High temperature (> 18º C) and high concentration of carbon in the influent wastewater led to a better removal efficiency of nitrogen. SMEBR showed outstanding results that make it a promising technology that can reduce fouling and remove all major macro nutrients at high efficiency in one single reactor.
|Divisions:||Concordia University > Faculty of Engineering and Computer Science > Building, Civil and Environmental Engineering|
|Item Type:||Thesis (PhD)|
|Degree Name:||Ph. D.|
|Date:||23 December 2011|
|Thesis Supervisor(s):||Elektorowicz, Maria|
|Keywords:||nutrient removal, Phosphorus removal, Nitrogen removal, Submerged membrane electrobioreactor (SMEBR), Membrane bioreactor (MBR), Electrokinetics, Electrocoagulation, Oxidation reduction potential, Simultaneous nitrification/denitrification, |
|Deposited On:||20 Jun 2012 18:03|
|Last Modified:||05 Nov 2016 01:53|
|Additional Information:||This research has demonstrated a novel new methodology to remove nitrogen and phosphorus in one single reactor through electrokinetics, which has many advantages in comparison with the conventional methods|
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