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UDC 628.35:661.63

Zalyotova N. A.

Specific characteristics of phosphorus removal in biological wastewater treatment

Summary

It is shown that in using chemicals for deep phosphorus removal in biological wastewater treatment or effluent polishing one must take into account the effect of added metal ions on biological treatment process. A technique is suggested for estimating chemical consumption depending on the selected flow scheme of biological and chemical treatment; adjusting factors with account of this effect are given.

Key words

wastewater , biological treatment , aluminium salts , chemical treatment , biogene substances , phosphates , total phosphorus , chemicals , ferrum salts

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UDC 628.316.13

Strelkov A. K., Teplykh Svetlana, Nosova E. G.

Treatment of chrome-containing wastewater of fur tanning factories

Summary

The results of studying the treatment of chrome-containing wastewater of fur tanning factories are presented. In the process of leather and fur tanning big amounts of wastewater containing raw material and wastes of chemicals, dyes and trimmings used for dressing are generated. A process flow scheme of wastewater treatment for the factories with a capacity of more than 200 m3/day is suggested. Theoretic substantiation of the use of standard and new chemicals is given. With the purpose of studying the physical and chemical characteristics of the total industrial waste flow observations of the pollution composition and mathematical processing of the data obtained were carried out. Studying the methods of fur tanning wastewater in context of the environmental safety showed that the pre­ference shall be given to chemical methods as well to electro-coagulation with chemical tertiary treatment that provides for the efficient treatment of such wastewater. The substantiation of technical and economic expediency of the treatment facilities construction is given.

Key words

treatment facilities , flow chart , chemicals , chrome containing wastewater , fur tanning and dyeing , mechanical pollution

DOI 10.35776/MNP.2020.05.02
UDC 628.16

Dobrynina Natal’ia, Karkanitsa Ol’ga

Control of the technological processes at the water intakes
of Novokuznetsk

Summary

In recent years, a set of measures has been implemented at the operating water intakes of the city of Novokuznetsk using advanced equipment and technologies that have provided for improving the integrity and efficiency of the water supply system. It was noted that in order to achieve maximum efficiency of the water treatment facilities, continuous improving the technology of water purification is required. The most acceptable and economical solution to this problem is carrying out research works at the technological lab of the Dragun water supply facilities. The filtration properties of materials (expanded clay, burned rocks, albitophyre, quartzite, etc.) were studied that resulted in choosing the type of filter material and determining its optimal grain particle size for loading filters at the water treatment facilities. The most effective chemicals for water purification from the local water source, the Tom River, were identified. These are aluminum oxychloride coagulant and cationic flocculants. The introduction of a comprehensive process automation system provided for the control of the technical condition of the equipment and its process parameters, as well as for the data acquisition, processing and storage.

Key words

water intake , water treatment station , chemicals , water treatment technology , comprehensive automation , electronic process database