Membrane bioreactor hydraulics

Le-Clech, P., Jefferson, B. and Judd, S.J. (2003) Impact of aeration, solids concentration and membrane characteristics on the hydraulic performance of a membrane bioreactor. Journal of Membrane Science, 218,117—129. Le-Clech, P., Jefferson, B. and Judd, S.J. (2005) Comparison of submerged and side-stream tubular membrane bioreactor configurations. Desalination, 173, 113-122. 

HIBA 2-Hydroxyisobutyric acid HIBAL 2-Hydroxy-2-methylpropanal HRT Hydraulic retention time LUST Leaking underground storage tank MBR Membrane bioreactor MTBE Methyl tert-butyl ether MPD 2-methyl 1,2-propanediol N Nitrate NA Natural attenuation ND Not determined ns Not specified P Phosphate... 

Microbial contamination is mainly caused by the presence of the microorganisms used in the biological process and can be eliminated by using ultra/microfiltration membrane bioreactors. The membrane effectively retains the microbial culture inside the reactor so that it may be operated under low hydraulic residence time. It has been previously demonstrated that the membrane bioreactor ensures a high nitrate removal rate (up to 7.7 Kg NO /m reactor-day) and a residual concentration of nitrate and nitrite, in the treated water, below the maximum admissible values (Barreiros et al., 1998). 

Membrane bioreactor plants are much smaller than CAS-TF plants. This is shown by comparing the total hydraulic retention time (HRT) in Figure 7.5 and the total plant surface area... 

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