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UDC

Advanced piping accessories for cold water pipelines

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UDC

Grundfos integrated approach to the solutions in the field of water and wastewater management

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UDC 628.17.001.4

Baltser D. V.

Investigating amounts and physical and chemical properties of by-product coke plant effluents

Summary

The results of investigating generation and composition of by-product coke plant phenolic effluents are presented. Balance flow scheme of phenolic effluents entering a biochemical treatment unit has been designed. It was established that the specific flow rate of phenolic effluents per 1 tonne bulk coke was 0.65 m3/h compared to 0.4–0.5 m3/h standard rate, i. e. exceeding the standard value was obvious. The need of designing and establishing the system of by-product coke plant effluent management from the moment of their generation was specified.

Key words

wastewater treatment , coking plant , biochemical treatment unit , phenolic and ammonia water , phenolic effluent drain

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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