Biofilm development on normal and modified surface in a hybrid SBR-based bioreactor

Abstract In this study, the performance of a sequencing batch reactor (SBR) by using rubber and metallic surfaces to grow fixed and dispersed particles-stabilized microbial biomass was investigated. The formation of biofilm on rubber, modified rubber by activated carbon, and metallic chip were studied. The biofilm developed on the surface that was modified by activated carbon through distributing method was more homogenous in comparison with other surfaces. Besides, the biofilm on this surface was less crashed during dehydration. It was found that the thickness of biofilm on this surface was more than the other ones. The effects of influent chemical oxygen demand (COD) and hydraulic retention time (HRT) on the reactor performance have been investigated. The maximum COD removal (%) was obtained for influent COD of 641 mg/L and aeration time of 4 h. The kinetic models for attached and suspended biofilm were assessed.

[1]  B. Rittmann,et al.  In situ determination of kinetic parameters for biofilms: Isolation and characterization of oligotrophic biofilms , 1986, Biotechnology and bioengineering.

[2]  F. Gebara.  Activated sludge biofilm wastewater treatment system , 1999 .

[3]  C. Michiels,et al.  Role of bacterial cell surface structures in Escherichia coli biofilm formation. , 2005, Research in microbiology.

[4]  G. Sekaran,et al.  Anaerobic tapered fluidized bed reactor for starch wastewater treatment and modeling using multilayer perceptron neural network. , 2007, Journal of environmental sciences.

[5]  R. K. Srivastava,et al.  Sequencing batch reactor technology for biological wastewater treatment: a review , 2011 .

[6]  G. Lettinga,et al.  Closed wastewater system in the tapioca industry in vietnam , 1999 .

[7]  Paul Stoodley,et al.  Biofilm formation and dispersal and the transmission of human pathogens. , 2005, Trends in microbiology.

[8]  R. Donlan,et al.  Biofilms: Microbial Life on Surfaces , 2002, Emerging infectious diseases.

[9]  Ayse Filibeli,et al.  Determination of kinetic constants of an anaerobic hybrid reactor , 2002 .

[10]  Orathai Chavalparit,et al.  Clean technology for the tapioca starch industry in Thailand , 2009 .

[11]  A. Gilmour,et al.  The influence of milk and milk components on the attachment of bacteria to farm dairy equipment surfaces. , 1985, The Journal of applied bacteriology.

[12]  A. E. Greenberg,et al.  Standard methods for the examination of water and wastewater : supplement to the sixteenth edition , 1988 .

[13]  E Debik,et al.  Use of the Static Granular Bed Reactor (SGBR) with anaerobic sludge to treat poultry slaughterhouse wastewater and kinetic modeling. , 2009, Bioresource technology.

[14]  A. Bruni,et al.  Performance of an Anaerobic Baffled Reactor (ABR) in treatment of cassava wastewater , 2009, Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology].

[15]  Chin Hong Neoh,et al.  Evaluation of macrocomposite based sequencing batch biofilm reactor (MC-SBBR) for decolorization and biodegradation of azo dye Acid Orange 7 , 2014 .

[16]  Thomas Bjarnsholt,et al.  Antibiotic resistance of bacterial biofilms. , 2010, International journal of antimicrobial agents.