Clarification And Filtration In A Single Step

Ken Krupa of Veolia describes the BIOSTYR DUO, a new technology that combines a biologically active filter (BAF) with a moving bed bioreactor (MBBR) to increase efficiency and reduce facility footprint.

Krupa, in this exclusive interview with Water Online Radio, deconstructs the BIOSTYR DUO process. He first provides background on the BIOSTYR:

“The BIOSTYR is a biologically active filter. It’s a filter that’s upflow, and the wastewater flows up to it, along with the air. There’s a media in the biologically active filter [and] the biofilm removes all the pollutants – the nutrients that might be in the wastewater, either an aerobic or an anoxic environment…

“Our media … in our BIOSTRYRs is 3.3- to 5-millimeter polystyrene beads. The depth of them in a BAF [is] about 10 to 12 feet.”

Krupa then describes the evolution of the BIOSTYR DUO:

“What we’re able to do is put in about two feet of MBBR media underneath [the BAF], as a roughing filter. What we find is that, by doing this in the DUO process, we’re able to increase the load to the plant, both in terms of pollutants and hydraulically, to reduce the footprint even further.

“We’re doing clarification and filtration, basically, in the same step,” he concludes, adding that the greatest benefactors are plants restricted to tight physical footprints.

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