Treatment of refinery wastewater in a three-phase fluidised bed bioreactor with a low density biomass support

Aerobic treatment of wastewaters in the inverse fluidised bed biofilm reactor

“…The largest reduction in COD was attained at (V b /V R ) = 0.55. An increase in COD removal with an increase in the (V b /V R ) from 0.50 to 0.55 can be attributed to the fact that for increasing (V b /V R ), more biomass grown on the particles participated in degradation of the constituents of the wastewater [5,13]. On the other hand, a decrease in COD removal observed with an increase in (V b /V R ) from 0.55 to 0.60 was due to the fact that in this case, a significant volume of the reactor was occupied by the support media, and consequently the aeration characteristics of the bed has worsened [5,8].…”

“…Sokół [13] has established that the optimal value of (V b /V R ) for a TFBBR when used in treatment of refinery wastewater was equal to 0.55. Therefore, in this study experiments were conducted for the ratios (V b /V R ) equal to 0.50, 0.55 and 0.60.…”

“…In other work, Sokół [13] has achieved a 90% COD reduction in aerobic treatment of highly toxic refinery wastewater in a TFBBR containing particles made of polypropylene. Sokół and Korpal [1] have reported a 98% COD reduction in treatment of phenolic wastewaters in a TFBBR in which particles made of polypropylene were fluidised by an upward cocurrent flow of gas and liquid.…”

Treatment of the refinery wastewater in a gas–liquid–solid three‐phase flow airlift loop bioreactor

“…The air was introduced to the draft tube through the jet nozzle with 6 mm diameter holes. The flow rate of air was measured with a rotameter (8) and controlled by a needle valve (9).…”

Phenolic wastewater treatment in a three‐phase fluidised bed bioreactor containing low density particles

“…With this support, the biomass loading was practically constant over the period of a 3‐month operation, and yet, the bioreactor performed very well with approximately 95% COD removal. Sokół12 has investigated the aerobic treatment of refinery wastewater in a TPFBB with polypropylene particles and reported about 90% removal of total COD. Good performance of the bioreactor makes this equipment well suited to treatment of industrial wastewaters, including these containing phenols.…”