Greywater Management in Low and Middle-Income Countries - SSWM
Greywater Management in Low and Middle-Income Countries - SSWM
Greywater Management in Low and Middle-Income Countries - SSWM
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Baffled septic tank<br />
Dos<strong>in</strong>g chamber<br />
Aerobic filter<br />
Level control <strong>and</strong><br />
effluent chamber<br />
Subsurface horizontal-flow filter<br />
The system treats greywater from n<strong>in</strong>e households, <strong>in</strong>clud<strong>in</strong>g water from<br />
laundry, kitchen, bath, washbas<strong>in</strong>, <strong>and</strong> other <strong>in</strong>-house water outlets exclud<strong>in</strong>g toilets.<br />
Total greywater production amounts to approximately 225 l/p/d, with an average<br />
6.8 m 3 <br />
<br />
grease <strong>and</strong> settleable solids, followed by a dos<strong>in</strong>g chamber. The greywater then<br />
<br />
<br />
<br />
measurement system.<br />
3 volume capacity<br />
<br />
<strong>in</strong>to four chambers to ensure the highest possible retention<br />
time for oil, grease <strong>and</strong> settleable solids.<br />
2 surface area<br />
received each about 1.75 m 3 of greywater over a period<br />
of 24 hours. The regular dose-spray<strong>in</strong>g <strong>and</strong> <strong>in</strong>terval<br />
<br />
67 cm/day load<strong>in</strong>g rate <strong>and</strong> 53 g/m 2 /d BOD organic load<strong>in</strong>g<br />
rate (Holte <strong>and</strong> Aas, 2005). The greywater percolates<br />
<br />
<br />
<br />
<br />
<br />
geotextile benthonite-clay (GCL). A top layer of coconut<br />
husk prevents topsoil from settl<strong>in</strong>g <strong>in</strong>to the crushed<br />
2 /p of l<strong>and</strong>.<br />
Ruellia sp.<br />
<br />
<br />
<br />
<br />
<strong>Greywater</strong> <strong>Management</strong> <strong>in</strong> <strong>Low</strong> <strong>and</strong> <strong>Middle</strong>-<strong>Income</strong> <strong>Countries</strong><br />
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