Critical analysis of submerged membrane sequencing batch reactor operating conditions.

To evaluate the Submerged Membrane Sequencing Batch Reactor process, several short-term studies were conducted to define critical flux, membrane aeration and intermittent filtration operation. Critical flux trials indicated that as mixed liquor suspended solids increased in concentration so would the propensity for membrane fouling. Consequently in order to characterise the impact of biomass concentration increase (that develops during permeate withdrawal) upon submerged microfiltration operation, two longer term studies were conducted, one with a falling hydraulic head and another with a continuous hydraulic head (as in membrane bio-reactors). Trans membrane pressure data was used to predict the maximum possible operating periods at 10 and 62 days for the falling hydraulic head and continuous hydraulic head respectively. Further analysis revealed that falling hydraulic head operation would require 21% more aeration to maintain a consistent crossflow velocity than continuous operation and would rely on pumping for full permeate withdrawal 80% earlier. This study concluded that further optimisation would be required to make this technology technically and economically viable.

[1]  Hang-Sik Shin,et al.  Sludge characteristics and their contribution to microfiltration in submerged membrane bioreactors , 2003 .

[2]  Rui Liu,et al.  Study on hydraulic characteristics in a submerged membrane bioreactor process , 2000 .

[3]  Simon Judd,et al.  Aerobic MBRs for domestic wastewater treatment: a review with cost considerations , 2000 .

[4]  Sang‐Hyoun Kim,et al.  Inhibitory effects of long-chain fatty acids on VFA degradation and β-oxidation , 2003 .

[5]  Saravanamuthu Vigneswaran,et al.  Influence of particle size and surface charge on critical flux of crossflow microfiltration , 1998 .

[6]  W. J. Ng,et al.  Engineering design approaches for minimum fouling in submerged MBR , 2004 .

[7]  Alain Grasmick,et al.  Hydrodynamic control of bioparticle deposition in a MBR applied to wastewater treatment , 1998 .

[8]  J Krampe,et al.  Sequencing batch reactor with submerged hollow fibre membranes for the biomass separation. , 2001, Water science and technology : a journal of the International Association on Water Pollution Research.

[9]  Tatsuki Ueda,et al.  Effects of aeration on suction pressure in a submerged membrane bioreactor , 1997 .

[10]  M Ragazzi,et al.  On-line control of a SBR system for nitrogen removal from industrial wastewater. , 2001, Water science and technology : a journal of the International Association on Water Pollution Research.

[11]  Michel Y. Jaffrin,et al.  Optimisation of an intermittent cross-flow filtration process of mineral suspensions , 1996 .

[12]  H. Chang,et al.  Simulation of sequential batch reactor (SBR) operation for simultaneous removal of nitrogen and phosphorus , 2000 .

[13]  H. Iwabu,et al.  Domestic wastewater reuse using a submerged membrane bioreactor , 1996 .

[14]  M. Jaffrin,et al.  Comparison between filtrations at fixed transmembrane pressure and fixed permeate flux : application to a membrane bioreactor used for wastewater treatment , 1999 .

[15]  S. Han,et al.  Membrane sequencing batch reactor system for the treatment of dairy industry wastewater , 2003 .

[16]  M. Moo-Young,et al.  Liquid circulation in airlift reactors , 1988 .

[17]  Chung‐Hak Lee,et al.  Characteristics of microfiltration membranes in a membrane coupled sequencing batch reactor system. , 2003, Water research.

[18]  D. A. White,et al.  Optimisation of intermittently operated microfiltration processes , 1993 .

[19]  M. Jaffrin,et al.  Reversibility of fouling formed in activated sludge filtration , 1999 .

[20]  Performance and membrane fouling in a pilot scale SBR process coupled with membrane. , 2003, Water science and technology : a journal of the International Association on Water Pollution Research.

[21]  Erwin Nolde,et al.  Greywater reuse systems for toilet flushing in multi-storey buildings – over ten years experience in Berlin , 2000 .

[22]  Simon Judd,et al.  Critical flux determination by the flux-step method in a submerged membrane bioreactor , 2003 .

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

[24]  Lloyd H. Ketchum,et al.  Design and physical features of sequencing batch reactors , 1997 .

[25]  Michel Y. Jaffrin,et al.  Contribution of various constituents of activated sludge to membrane bioreactor fouling , 2000 .

[26]  Alain Grasmick,et al.  Membrane bioreactor fouling in sub-critical filtration conditions: a local critical flux concept , 2004 .

[27]  Y. Kiso,et al.  Wastewater treatment performance of a filtration bio-reactor equipped with a mesh as a filter material , 2000 .