| 摘要 |
<p>The invention relates to a method for the purification of a polluted liquid, especially a washing liquid used at a washing installation, by sucking the polluted liquid and leading it through at least one filter and next leading back the liquid purified thus to a take-off point, whereby the liquid flow carried through the filter is maintained at a substantially constant level. The invention further relates to an apparatus for carrying out said method comprising a suction line connected to a source of polluted liquid, a discharge line for the purified liquid debouching at a take-off point, at least one filter unit positioned between the suction line and the discharge line, a pump connected therewith in series and means for limiting the amount of liquid flowing across the filter unit, said means being positioned in series with the filter unit. The described method and apparatus allow large savings on the amount of washing liquid required for operating a washing installation and lead to a considerably decreased environmental charge. <IMAGE></p> |
