The biological colonization and deposits of two filter materials (granular activated carbon (GAC) and sand) were examined by scanning electron microscopy and microanalysis. The samples came from a pilot plant for drinking water treatment where a humic-acid-containing groundwater was treated by aeration, flocculation, sedimentation, filtration and ozonation. One additional GAC-column was run without preozonation. The GAC column run with preozonation was heavily colonized in the upper part (approximately 10**9 bacteria per gram GAC). The colonization decreased along the column. The GAC column without preozonation and the sand-column were only slightly colonized, but the latter showed deposits of minerals: one mineral layer consisted of calcium crystals arranged in a regular manner, the other one contained calcium and manganese without any special structures.
|Translated title of the contribution
|Biological colonization and mineral deposits on filter material for water treatment
|Number of pages
|GWF, Wasser - Abwasser
|Published - Jan 1 1983
ASJC Scopus subject areas
- Water Science and Technology