Water purity
When the plant is operated and maintained according to specifications, the process water produced fulfills the quality requirements of the EU directive for bathing water (76/160/EWG) and the fbr information sheet H 201 in terms of microbiology and hygiene. In addition it also fulfills the "quality requirements for process water from processed grey water“ of the senate department for urban development in Berlin.| Quality objectives | Assessment criteria / reason | | Hygienically / microbiologically flawless | Total coliform bacteria: 0 / 0.01 ml (<100/ml)
Faecal coliform bacteria: 0 / 0.1 ml (<10/ml)
P. aeruginosa: 0 / 1.0 ml (<1/ml) | | Low BOD | BOD7 under 5mg/l, to ensure that the grey water is cleaned for the most part | | Colourless and clear | UV transmission 254nm in 1cm cuvette: at least 60% | | Oxygen-rich as far as possible | > 50% saturation, so that the process water can be stored | | Virtually free of suspended matter, odourless | so that fittings work perfectly and there is no inconvenience for the user |
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