Tag:mechanical treatment

№12|2014

WASTEWATER TREATMENT

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UDC 628.334.1

Streltsov S. A., Kuriatnikov E. A.

High performance design of trash screens for wastewater treatment

Summary

The reliable operation of the treatment facilities of the municipal wastewater disposal system depends significantly on the efficiency and robustness of the trash screens installed in the head of the process flow at the treatment facilities. In addition trash screens not only protect the equipment from blockages but also prevent suspended solids from polluting natural water bodies receiving effluents. In order to improve the efficiency of trash capture the use of RS screen is recommended. It is highly resistant to mechanical damage caused by large-size impurities in wastewater which results in the reduction of the failure rate and the amount of repair works. The screen design includes a device for additional rake cleaning during the reverse movement to completely eliminate any risk of the rakes being wrapped with filamentary inclusions during the operation. An original mechanism of driving chain tensioning provides for eliminating rake jerking and skewing. The design ensures screen self-sealing in the process of installation into the channel to eliminate unscreened water breakthrough between the frame and channel walls. For the period of RS screens operation the following results were noted: full absence of filter cloth clogging; 3–4 fold screen output increase compared to the previously operated models; reduction of bottom sediments in the channel before the screens; high reliability in case of peak discharge of filamentary inclusions; reduction of energy consumption.

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№9-2|2011

WASTEWATER TREATMENT

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UDC 628.334

Khrekov N. B., Borisov V. Ya.

Enhancement of Operation Efficiency of Mechanical Treatment Plant of Samara’s Aeration Station

Summary

Problems of the treatment of wastewater of the Samara’s city aeration station connected with ineffective operation of mechanical screens are described. The substantiation of the choice of mechanical screens PC manufactured by PSP Prommashservis Ltd. for the replacement of obsolete equipment and also steel of 12X18H10T grade for manufacture of screens PC is made. The distinctive features of the screens that distinguish them among analogues are presented.

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№2|2010

RESOURCES SAVING

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УДК 628.32

CHURBANOVA I. N., PEVNEV S. G., DATLOVA T. V.

Progressive Techniques of Wastewater Treatment under Restricted Conditions of Urban Development and Power Consumption Limitation

Summary

A flow chart of advanced biological treatment of wastewater under restricted conditions of a development territory and minimization of power consumption for technological needs is presented. This flow chart makes it possible to design and modernize the stations of any output ensuring the achievement of standards of wastewater treated.

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№10|2015

WASTEWATER TREATMENT

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UDC 628.35

Esin M. A., Smirnov Aleksandr Vladimirovich, Sokolov A. N.

Commissioning – the key stage of putting treatment facilities into operation

Summary

The issues related to the commissioning of the equipment and wastewater treatment facilities are considered. A brief review of the history of commissioning the facilities in the Soviet Union and in present day Russia is given. The problem areas of adjusting every equipment assembly, the algorithm of work performance and the required results are shown. The attainment of sustainable performance is provided by quality and skilled commissioning. Correct visual evaluation of the equipment state carried out during the acceptance for commissioning procedure is very important. Nonobserved defects and faults in the process line will cause fast assembly fail which can result in an accident. The principles of «My Project» Company activities related to commissioning are presented. Special attention is paid to adjusting biological treatment in aeration tanks: from the front end engineering to the routine maintenance of the assembly.

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№11|2010

NEW TECHNOLOGIES AND EQUIPMENT

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UDC 628.334

Shchetinin A. I., Marchenko Yu. G.

Up-To-Date Equipment and Facilities for Mechanical Treatment of Wastewater from Coarse-Disperse Admixtures

Summary

Up-to-date equipment for wastewater treatment from coarse-disperse admixtures is considered. Designs of screens are described briefly, their advantages and shortcomings are presented. Formulas for calculation of head loss on sreens are presented. Recommendations to install screens with openings not less than 5 mm are made. The comparative analysis of different methods of sand-catchers design shows that the normative time of stay in sand catchers can be extended up to 10 minutes. Literary data treatment has made it possible to obtain formulas offered as a new calculation base for determination of efficiency of horizontal and aerated sand catchers during the designing. Up-to-date equipment for sand collection and removal is considered.

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№9|2017

BEST AVAILABLE TECHNIQUES

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UDC 628.3

Smirnov Aleksandr Vladimirovich

Advanced engineering and experience of BAT implementation

Summary

The use of the Information-Technical Guidebook on the best available techniques «Wastewater treatment in public wastewater disposal systems of communities, urban districts» (ITS 10-2015) provides for only a general idea of the catalogue of technologies that have to be applied in order to ensure high efficiency of wastewater treatment. The choice and substantiation of a particular technology are carried out on the basis of the operation experience and comprehensive project engineering. Case studies of using «MY Technologies» that are ready-made technical solutions of mechanical («MY MET») and biological («MY BIO») wastewater treatment for the wastewater treatment facilities in Sochi, Vologda, Kolomna are presented.

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vstmag engfree 200x100 2

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Российская ассоциация водоснабжения и водоотведения

Конференция итог

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