PILOT STUDY TO FULL SCALE TREATMENT – THE MOVING BED BIOFILM REACTOR EXPERIENCE AT THE PHILLIPS 66 BORGER REFINERY
Due to increasing loads from the refinery and specialty chemical plants located on site, the Phillips Petroleum Company was looking to increase the capacity of its wastewater treatment facility located at the Borger Complex in Borger, Texas. To save on capital costs and due to the configuration of the wastewater treatment facility, the facility retro-fitted one of the unused coagulator basins on site with the Moving Bed Biofilm Reactor (MBBR) process. Using the basin created a two stage biological treatment system where the first stage MBBR acted as a roughing stage, removing the majority of the easily degradable soluble BOD, and the existing activated sludge basins performed all the nitrification and toxicity reduction necessary to meet the required permit levels. After a successful pilot test with the innovative Kaldnes Moving Bed Biofilm Reactor (MBBR) Process was performed, a full scale MBBR was constructed & installed and brought on line in April 1999. Results from the first nine months of operation at the Phillips refinery showed surface area loading rates (SALR) averaging 4.4 lb COD/1000 ft2/d (21.51 g COD/m2/d) or 1.75 times the loading seen in the pilot study while percent removals remained constant at 62%. Results have shown the MBBR treatment system increased the overall treatment efficiency of the Phillips Petroleum Borger WWTP by reducing organic discharges in half and indirectly increased the nitrification efficiency of the downstream activated sludge process.
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Document Type: Research Article
Publication date: 2000-01-01
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