Design a aerated grit chamber for a wastewater treatment plant where the incoming average flow rate is 0.8m3/s. Assume • a peak factor of 2.5. • Detention time = 225 sec • Width to Depth ratio = 1.5:1 • Width = 3 m • Aeration requirement is 0.3 m3/min/m • Sludge generation 40L/103 m3

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Consolidation parameters

Consolidation is the process of expulsion of pore water present in the voids of soil solids under the pressure of the applied load. This is a quick process in the case of coarse-grained soils since the permeability is high due to the presence of more voids, while it is a slow and gradual process in the case of clayey soil as the permeability of clay is less. An example of consolidation is the settlement of soil under a building due to the load coming from the building.