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Waste water treatment
Soak pit
Suitable for:
A small quantity of waste water(e.g. domestic waste water from a house, chemical mixing point, spraying equipment washing water of a smallholder farm)
Broken bricks or stones to remove big particles
Charcoal
to remove chemical contaminants
Sand and gravels to remove small particles You can build the wall structure with a cement, or
remove the bottom part of a plastic or metal drum and bury it.
Make sure that you keep a certain portion above the ground level to prevent surface water from flowing inside. If the surface water goes into the soak pit, it will overflow very quickly.
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2
Three tanks on a slope
Suitable for:
A large quantity of waste water (e.g. waste water from a factory, waste water from workers’ village, spraying equipment washing water of a large plantation)A place with slope Put gauge to trap solid waste
before the water goes into the tank
Broken bricks or stones
Make sure that the outlet is at the bottom of the tank so that the water will go through the filtration.
Charcoal
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3
Waste water treatment
Three tanks on a flat place
Broken bricks
or stones Sand and gravel Charcoal
Solid waste trap
Suitable for:
A large quantity of waste water
(e.g. waste water from a factory, waste water from workers’ village, spraying equipment washing water of a large plantation)
When there is no slope
When there is a limited space for a water treatment system
Opening at the bottom
Waste water treatment
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4
Three ponds with aquatic plants
Suitable for:
A very large quantity of waste water A place with some slope
When there is a large space available for a water treatment system
Aquatic plants Check gates
Metal or concrete frames on the sides
Wood planks slotted
