Waste Water Engineering
In septic tanks,

The clear space between the baffle top and covering slab is about 7.5 cm
All listed here
Free board of 0.3 m may be provided
The baffles or tees are extended up to top level of scum

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Waste Water Engineering
Skimming tanks are

Used to remove the grease and oil
Tanks provided with self- cleansing screens
Improved version of grit chambers
Those from which sludge is skimmed out

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