attached growths

Reading time:

As part of these processes, a bacteria film can be developed on a fixed plastic support, through which water flows upwardly or downwardly.

Several such systems have been proposed; but in long term (2-3 years), they all have proved to be extremely sensitive to fouling (coarse suspended solids, precipates, etc. SUEZ does not recommend these systems, but the use of the techniques by sludge blanket or fluidised bed.