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UDC 628. 334.2.004.69

Kalinin A. V.

Hydraulic resistance of a traditional grit chamber

Summary

The experimental results of studying the grain-size distribution of sludge deposits in large combined sewers are presented. The curves of the grain-size distribution of sludge deposits are given. A formula calculating the hydraulic resistance of a traditional grit chamber in relation to the changes in dimensions in proportion to filling with sediments is proposed. Grit chambers are installed in large-size sewers upstream sewer siphons in the place of pollutants deposits accumulated because of grade reduction or local resistance.

Key words

sludge , sand catching chamber , grain-size distribution of deposits , hydraulic resistance , combined sewer

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