| 摘要 |
The invention relates to a method and device for effluent treatment, whereby the effluent (6) to be treated is biologically purified in a fixed-bed (1), in particular, a trickling filter and the output (12), from the fixed bed (1) is subjected to a dead-end membrane filtration (2) and the retained solids removed by back-flushing. Effluent (6) can, thus, be purified using a fixed-bed (1) to such a degree that the quality of the treated effluent allows it to be used as water supply, in particular, for irrigation purposes. Furthermore, filtration by means of the dead-end principle has the advantage of a low energy requirement in comparison with a cross-flow operation and a dead-end membrane filtration plant requires less space than a conventional clarifying basin and sand filter. |
