[Reduction of bacteria and viruses in purification plant discharges using microfiltration in a model plant].

Microfiltration through a membrane matrix of a nominal pore size of 0.2 microns has been applied for advanced treatment of mechanically and biologically treated wastewater. Elimination of bacteria and coliphages as well as the decrease in some chemical constituents were studied at a flow rate of 80 l/h.

[Inactivation of bacteria and coliphages in surface water highly polluted by secondary effluent and purified by flocculation and filtration by means of UV irradiation at a pilot plant scale].

The water of a channel in Berlin which is highly polluted by municipal sewage effluent is treated at the phosphate elimination plant (PEP) Tegel by flocculation and filtration in order to reduce eutrophication in the following Lake Tegel. The elimination of bacteria and coliphages in the effluent of the PEP was investigated in a scale pilot UV irradiation reactor installed at the outlet of the PEP Tegel. The influence of technical parameters such as flow rate and the arrangement of 23 UV lamps in the reactor on the inactivation was tested.