Ecological Variation of High Activated Bacteria on Bioaugmentation Activated Carbon

Plant study on the ecological variation characters on bioaugmentation activated carbon was conducted, and the results show that when the operation time does not exceed 72 h in every backwashing cycle, bacteria on activated carbon immobilize firmly and the bacteria amount keeps relatively steady with (4~5) x 10⁸ CFU/(gCarbon) in upper part and (2~3) x 10⁸ CFU/(gCarbon) in lower part. But the bacteria activity declines slowly along with the operation time. The SOUR of the upper part declines from 1.1 x 10³ mgO²/(cm³ Ch) to 0.8 x 10³ mgO²/(cm³ Ch) and the SOUR of the lower part declines from 0.75 x 10³ mgO²/(cm³ Ch) to 0.6 x 10³ mgO²/(cm³ Ch). The causation is mainly that the aboriginal bacteria rush into the process system continuously in little amount and engender certain impact on the niche of the high-activated bacteria. The high-activated bacteria distributing by monolayer and flocculently on the surface of activated carbon, and then they exist greatly ground holes and crack on the surface of activated carbon, forming countless active centers for biology decomposing.