Greywater from households
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The European standard DIN EN 12056-1 defines grey water as faecal-free, less contaminated sewage water, such as that accumulated from showering, bathing or washing hands, but also from washing machine and for treatment of industrial water or process water. The quality of water can vary greatly, as illustrated in the following survey:
| Grauwasser (fbr H201)
Durchschnitt (Bandbreite) Dusche, Badewanne + Handwaschbecken | |
|---|---|
| CSB (mg/l) | 225 (150-400) |
| BSB (mg/l) BOD biochemical oxygen demand | 111(85-200) |
| AFS (mg/l) | 40 (30-70) |
| Pges (mg/l) | 1,5 (0,5-4) |
| Nges (mg/l | 10 (4-16) |
| PH | (7,5-8,2) |
| Gesamtcoliforme Bakterien (1/ml) | 105 (10-105) |
| E.coli | |
| Fäkalcoliforme Bakterien (1/ml) | 104 (10-105) |
