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Moving bed biofilm reactor (Moving Bed Biofilm Reactor, referred to as the MBBR ) is formed in the fluidized bed based on the new technology, sewage treatment between efficient new activated sludge and biofilm reactor . Compared with the activated sludge process , MBBR has a high efficiency, high organic load , low energy consumption , simple operation , remaining less sludge , sludge bulking . A / O MBBR combined process to transform the traditional refinery wastewater treatment process pilot study , combined process wastewater in COD , NH3 - N and oil removal and system resistance to shock loading capability . In 120 - 150m3 / h of the water flow , the water temperature of 28-35 ° C , hydraulic retention time ( HRT ) 11 - 14H , sludge reflux ratio R ( ? ) 0.9 , pH 7-8 , dissolved oxygen 3.0 - 5.0mg / L under the conditions of the main findings are as follows : 1, the influent COD concentration of 152.8mg / L ~ 540.0mg / L , MBBR pool COD average removal rate of 81.74% , the average effluent COD concentration of 48.19mg / L ; influent NH3 -N concentration was 10.76mg / L ~ 17.98mg / L , the MBBR pool NH3-N removal efficiency of 48.10% , the effluent NH3-N average concentration of 7.74mg / L ; influent oil concentration of 14.0mg / L to 80.0mg / L , MBBR pool oil removal rate was 91.00% , the The water oil average concentration of 3.62mg / L . 2 , the case of large fluctuations in water quality , A / O MBBR combined process for the removal of various pollutants in refinery wastewater with the original biochemical process removal efficiency is better, more stable water quality , water water quality can meet a standard of \3, the experimental results show that the A / O MBBR combined process in the transformation of the traditional refinery wastewater treatment system is feasible, the proposed transformation program , you can not change the conditions of the structures pool capacity to upgrade the existing wastewater treatment unit processing capacity and processing results, to ensure that water quality standards .
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