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UDC 628.336.429
Kriven' A. P.
Selecting the equipment for wastewater and industrial sludge dewatering
Summary
The basic process parameters when selecting dewatering equipment are as follows: capacity; water content of sludge fed for dewatering; water content of dewatered sludge; dry matter retention efficiency; suspended solids concentration in filtrate (centrate). The comparative analysis of the technologic and economic aspects of using the most popular equipment for wastewater sludge dewatering is presented. The specific features of using centrifuges, belt filter presses and screw dehydrators are considered. Screw dehydrators for wastewater sludge dewatering at small-scale treatment facilities are described.
Key words
dehydration , sludge , flocculant , centrifuge , filter-press , dry matter , screw dehydrator
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UDC 628.32.004.69
Bagaev Iurii, Veshkurtsev V. M., Gundyreva Tat’iana, Khutornyuk G. N.
Modernization of Sewerage Treatment Facilities
Summary
The basic technical decisions and a description of the new equipment introduced at sewerage treatment facilities of the city of Novosibirsk are presented. It is told about the methods used when repairing pipelines and capacitive facilities. Modernization is carried out at all stages of treatment: at the main pumping station, mechanical and biological treatment facilities, sludge treatment facilities. Measures carried out make it possible to improve the quality of wastewater treatment, to reduce the discharge of polluting substances into the Ob. Modernization of the operating treatment facilities owing to the use of up-to-date equipment made it possible to improve the reliability of operation of the complex as a whole, to reduce the volume of sludge intended to further utilization, to reduce the negative influence on the environment and improve the city ecology.
Key words
sedimentation tank , modernization , intensification , centrifuge , filter-press , sewerage treatment facilities , grate , grit chamber , methane tank , sludge dewatering , thickener
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UDC 628.336.57:628.162.52
Podkovyrov V. P., Arutyunova I. Yu., Yagunkov S. Yu., Zvyagin K. E., Dmitrieva Yu. S.
Operational Experience of a Shop of Mechanical Dewatering of Water Treatment Sludge at the Eastern Water Treatment Station
Summary
From January, 2010 the facilities for processing of water treatment sludge operate at the Eastern water treatment station of the Moscow State Unitary Enterprise Mosvodokanal (MSUE). The facilities include settling tank-sludge thickeners, drum thickeners, and centrifuges. The sludge treatment facilities operate round-the-clock. The operational experience shows that influent wastewater is characterized by significant irregularity during the day both by flow rate and by quality. In this connection there was the search for both optimal operating conditions of the facilities and optimal reagents making it possible to achieve the maximum efficiency of dewatering at preservation of acceptable quality of wastewater disposed.
Key words
dehydration , flocculant , centrifuge , sludge from water treatment plant , sludge treatment facility , drum thickener
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UDC 628.336.4
Smirnov Aleksandr Vladimirovich, Zinchenko D. B., Badulin R. V.
Typical engineering solutions of a wastewater sludge
mechanical dewatering plant
Summary
An illustration of a comprehensive typical solution is presented for the construction of a wastewater sludge mechanical dewatering plant based on filter press use for wastewater treatment facilities. Choosing the method of wastewater sludge treatment has been a complicated engineering task that demands special research and experiments at simulated or operating wastewater treatment facilities. Herewith the sludge dewatering properties, dewatering equipment type and cost, as well as the technology of the subsequent sludge handling with account of sludge utilization shall be taken into consideration and specified. The advantages of new construction compared to the upgrade of the existing buildings, networks, equipment are shown. Two of the typical projects are presented – with the use of two and three filter presses. The developed engineering solutions provide for the shortened timescales of project design and cost. The typical projects have been executed with the use of advanced 3D-designing tools that provide for the visualization of the building, equipment and utility systems already at the design stage of the future wastewater sludge mechanical dewatering plant.
Key words
wastewater , centrifuge , filter-press , sewerage treatment facilities , sludge mechanical dewatering , typical project
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