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UDC

Khramenkov S. V.

Mosvodokanal at the new stage of progress

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UDC 628.16.081.32:628.094.3-926.214

Shushkevich E. V. , Babaev A. V., Smirnov A. V., Sourayeva N. O., Grigoryev A. S.

Improving the water treatment technology at the West water treatment plant

Summary

In January 2011 newly built ozonation and activated carbon filtration facilities with a capacity of 250,000 m³/day were put into operation at the West water treatment plant in Moscow. The facilities are fully automatic. Monitoring and control of the treatment process is carried out from the central control room. The technology of ozonation in combination with activated carbon filtration ensures high efficiency of organics removal (color, permanganate oxidability, total organic carbon), deodorization, and improvement of the drinking water taste, allows minimizing the formation of chlororganics (chloroform). The amount of water treated with new technology was 490,000 m³/day or 43% of the total supply to the city.

Key words

settling , filtration , water treatment , ozonsorption , mechanical mixing chamber , flocculation chamber

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UDC 628.16.066.1(282.247.41)

Podkovyrov V. P., Arutyunova I. Yu., Yagunkov S. Yu., Shemyakin Yu. V., Strikhar Yu. V.

Technology of high-speed water clarification with the use of microsand

Summary

The Research & Development Centre of MPUE Mosvodokanal investigated a new process of high-speed water clarification. The presented technology is an upgraded option of the traditional technology of water clarification. It allows using the potential of coagulation-settlement processes to the maximum extent. These processes have been the vital stage of the water treatment technology. The results of the studies showed that the developed technology ensures more efficient color and permanganate oxidizability removal compared to the traditional water treatment process used; besides, it decreases drastically the concentration of residual aluminium in drinking water.

Key words

potable water , chromaticity , residual aluminium , high-speed clarification , microsand , permanganate oxidizability

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UDC 628.169.7:614.77

Khrenov K. E., KOZLOV M. N., GRACHEV V. A., Shchegolkova N. M., Vanyushina A. Ya.

Investigation of properties of new soils produced from water sludge

Summary

The properties of soil produced from the sludge generated at the water treatment plants have been investigated. A new method of soil production has been developed. Biotesting with the use of two biotests (Ceriodaphnia and Infusoria) revealed some admissible soil toxicity while water stability was assessed as excellent. The comprehensive physical analysis showed that the addition of water sludge into loam soil enhances active processes of structure formation. The soil is well structured, resistant to unfavorable mechanical, physical and chemical impacts including acid-based solutions. The presented soil is recommended for grassplot formation as well as for biofuel crop cultivation. The grassplots formed with the new type of soil showed rather high resistance to drying up during the extremely hot summer of 2010.

Key words

sludge , water treatment , maximum permissible concentration , soil structure , soil , buffer capacity , biotesting , heavy metals

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UDC 543.33

Kashkarova G. P., Rybentsova I. A., Margolin S. L., Vorobyova E. V.

The experience of measuring aluminium ion in water

Summary

Practical use of the measuring techniques (specified in ПНД Ф 14.1:2:4.166-2000 and State Standard ГОСТ 18165-89) revealed a number of defaults in the process of determining low concentrations of aluminium in water. The technique of measurement is using the effect of aluminium-aluminon complex coloration with different chemical dosing methods. The experimental investigations showed that replacing successive addition of low concentrations of chemicals with reaction mixture improves the reproducibility of the results. However, the estimate accuracy of measurements (below 0.1 mg/l concentration) carried out with the certified aluminium determination techniques were not reached. Thus, the metrological performance of ПНД Ф 14.1:2:4.166-2000 and State Standard ГОСТ 18165-89 technique have to be revised the more especially that they have been widely used.

Key words

potable water , concentration , aluminium , aluminon solution , sample , absorbency

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UDC 628.147.2

Khramenkov S. V., Generalov N. S., Baranov S. V., Artyushin M. V.

Advanced methods of the Moscow water distribution network reconstruction

Summary

A review of the advanced trenchless technologies of pipeline repair is presented. The main methods of damaged pipe rehabilitation with the use of polyethylene U-liner, spraying on cement-sand coatings, synthetic tubes impregnated with special polymerizing compounds are considered. The methods based on installing polyethylene, steel or cast iron pipes in the existing pipeline subject to reconstruction: «pipe in pipe without bursting» and «pipe in pipe with bursting» (pipe bursting) are discussed; their advantages and disadvantages are considered in relation to the conditions of usage in the dense city infrastructure.

Key words

polyethylene , pipeline , trenchless reconstruction , steel , cast iron , cement-sand coating , polymer liner

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UDC 69.055.5:628.147.25:628.247

KOSYGIN A. B., Khanin V. N., FOMINA I. V., Baranov S. V., Korabelnikov T. V.

Instrumental monitoring of water and sewage networks construction in Moscow

Summary

In order to improve the operation reliability in 2005 Technical Diagnostics Centre of MPUE Mosvodokanal was established. The main challenges of the Centre were determined as follows: improving water and sewage network operation reliability, elimination of pipeline failures by testing the technical state and protecting from electrochemical corrosion. For this purpose the analysis of the underground pipeline integrity by inspection is carried out. Diagnostic measures beside TV inspection include testing the presence of ground current and soil corrosion, ultrasound diagnostics, testing insulation coating, ultrasonic thickness measuring etc. Upon the completion of diagnostics specific measures for each case are developed, and programs of network reconstruction and relaying are compiled. The quality of construction and reconstruction has a direct impact on the subsequent pipeline operation. Therefore instrumental monitoring of construction works is a necessary attribute in ensuring reliable operation of water and sewage networks. The advanced monitoring methods such as TV inspection of the inner surface; ultrasound and X-ray control; axial tension testing of the welded joints, control of the insulating coating provide for the improvement of the quality of the old pipeline rehabilitation and new pipeline construction.

Key words

water supply and sewerage networks , ultrasound , instrumental monitoring , X-ray investigation

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UDC 628.35:661.63.001.42

KOZLOV M. N., Nikolaev Yu. A., KAZAKOVA E. A., Khramenkov S. V., Pakhomov A. V.

Industrial tests of biological and chemical phosphorus removal at the Moscow wastewater treatment facilities

Summary

The results of industrial-scale testing of combined biological and chemical phosphorus removal technology with the addition of ferric chloride at the Lyubersty wastewater treatment facilities are presented. The process of eliminating phosphorus from the municipal wastewater low in organics is unstable. During the experiment high level of phosphate removal (to 0.2 mg/l) was reached on retention of high efficiency removal of other pollutants. The use of ferric chloride does not influence the efficiency of biological nitrogen removal; however, the efficiency of phosphorus removal decreased a little. The recommendations were developed on using biological and chemical method of phosphorus removal as a temporary measure to provide for the required quality of effluent during high phosphorus load.

Keywords

wastewater , phosphorous , ferric chloride , biologic and chemical technology

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UDC 628.35:661.5.63

KOZLOV M. N., Moyzhes O. V., Nikolaev Yu. A., GRACHEV V. A., Kevbrina M. V., Dorofeev A. G., Aseyeva V. G.

M-Defanox – multisludge system of nutrient removal

Summary

M-Defanox new technology was developed for the treatment of municipal wastewater low in organics. The method is based on the use of three sludge types and dephosphorization under anoxic conditions. The technology provides for the efficient utilization of organics in biological treatment process and ensures 99% nitrogen removal, 80% phosphorus elimination, 80% COD removal and 95% BOD removal.

Key words

wastewater , biological treatment , nitrogen , phosphorous , activated sludge , biogenic elements