Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Biofiltration performance: part 2, effect of backwashing
Backwashing a biological dual‐media filter with chlorinated water results in lower accumulations of biomass at the top of the filter and lower steady‐state removal of TOC, DBP precursors, and ozone DBPs.
In a biological dual‐media (anthracite–sand) filter, backwashing with nonchlorinated water did not affect the biomass attached to the media at the top of the filter or the control of total organic carbon, disinfection by‐product (DBP) precursors, or ozone DBPs. Backwashing a similar filter with chlorinated water, however, resulted in lower concentrations of biomass attached to the media at the top of the filter and lower steady‐state removal of the same parameters. A loss of some of the attached biomass at the top of the filter occurred immediately after backwashing with chlorinated water, but later in the filter cycle the biomass recovered to its prebackwashing concentration. Concurrent with this loss of biomass was an increase in the concentrations of ozone DBPs in the filter effluent; these also recovered to prebackwashing concentrations later in the filter cycle.
Biofiltration performance: part 2, effect of backwashing
Backwashing a biological dual‐media filter with chlorinated water results in lower accumulations of biomass at the top of the filter and lower steady‐state removal of TOC, DBP precursors, and ozone DBPs.
In a biological dual‐media (anthracite–sand) filter, backwashing with nonchlorinated water did not affect the biomass attached to the media at the top of the filter or the control of total organic carbon, disinfection by‐product (DBP) precursors, or ozone DBPs. Backwashing a similar filter with chlorinated water, however, resulted in lower concentrations of biomass attached to the media at the top of the filter and lower steady‐state removal of the same parameters. A loss of some of the attached biomass at the top of the filter occurred immediately after backwashing with chlorinated water, but later in the filter cycle the biomass recovered to its prebackwashing concentration. Concurrent with this loss of biomass was an increase in the concentrations of ozone DBPs in the filter effluent; these also recovered to prebackwashing concentrations later in the filter cycle.
Biofiltration performance: part 2, effect of backwashing
Miltner, Richard J. (Autor:in) / Summers, R. Scott (Autor:in) / Wang, Jack Z. (Autor:in)
Journal ‐ American Water Works Association ; 87 ; 64-70
01.12.1995
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
The effect of backwashing rate on filter performance
| Wiley | 1982
Biofiltration performance: part 1, relationship to biomass
| Wiley | 1995
Backwashing of Granular Filters
| Wiley | 1977
APPARATUS FOR BACKWASHING HAVING PLURAL SURFACE WATER LINE AND BACKWASHING METHOD OF SAME
| Europäisches Patentamt | 2016
APPARATUS FOR BACKWASHING HAVING PLURAL SURFACE WATER LINE AND BACKWASHING METHOD OF SAME
Europäisches Patentamt | 2017