Aerobic treatment of wastewaters in the inverse fluidised bed biofilm reactor

Optimal Aerations in the Inverse Fluidized Bed Biofilm Reactor When Used in Treatment of Industrial Wastewaters of Various Strength

“…Biological wastewater treatment conducted in systems based on activated sludge requires retention time of many days [1,2]. On the other hand, the same treatment can be achieved in a fluidized bed biofilm reactor (FBBR) in retention time of several hours [1,3].…”

“…On the other hand, the same treatment can be achieved in a fluidized bed biofilm reactor (FBBR) in retention time of several hours [1,3]. The fluidized bed technology owes its high-rate success to much higher surface area and biomass concentration than those that can be achieved in the conventional treatment processes.…”

“…The FBBRs, in which the biomass is fixed on inert particles, are among the most effective apparatuses used in wastewater treatment [1]. The bed consisting of small particles offers a vast surface area for microbial growth in the state of fluidization.…”

“…The reactor outperforms other reactor configurations used in wastewater treatment such as the activated sludge system and packed-bed (or trickling-filter) reactor [1,2]. The superior performance of the FBBR stems from the very high biomass concentration (up to 30 -40 kg/m 3 ) that can be achieved due to immobilization of cells onto or into the support media.…”

“…The application of the inverse FBBR, in which a bed consisting of low density (matrix particle density smaller than that of liquid) particles expands downwards during fluidization, allows the control of biomass loading and provides the high oxygen concentration in the reacting liquid media [1,3].…”