Subterra - Pflanzenkläranlage mit underirdischem Abwassereintrag

In the plant described in the paper, the sewage to be treated flow into the bed subterraneously through special hoses. Such an even distribution across the bed with subsequent vertical flow has the following advantages: very high purification efficiency; no odour nuisance or hygiene problems; no run-off of untreated sewage above ground; no special type of soil required; and very high process stability independent of season