Conception of Reconstruction of City Sewerage Treatment Facilities of Samara

Summary

The results of years of research aimed at improving the quality of wastewater treatment at the city sewerage treatment facilities of Samara are presented. The technology of the Capetown University is the most acceptable for the further reconstruction of facilities due to the low concentration of organic substances in clarified wastewater and a high ratio of biogenic elements concentration to biochemical consumption of oxygen. At present the studies of biomembrane treatment with the use of hollow fibre membranes and equipment of General Electric Co. are planned. For that it is necessary to build a screens building and to place also the unit of UV-disinfection of treated wastewater. The cost of reconstruction of the treatment facilities will be 11,8 milliards of roubles.

Key words

biological treatment , ultra-violet disinfecting , sewerage treatment facilities , grate , membrane bioreactor

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UDC 628.32.004.1

Boichenko A. A., Gokov I. N., Miasoedov A. IU., Syrnikov E. V.

Local treatment facilities of the Belgorod Abrasive Plant OJSC

Summary

In the process of developing local treatment facilities at the Belgorod Abrasive Plant the experts of EkoTON Company used integrated multi-factor approach with exploratory design and adjustment of the facilities to provide for assured efficient wastewater treatment. Carrying our exploratory experimental design was motivated by developing an optimal process flow scheme of the local treatment facilities with account of the set of interrelated factors that determine both process and economic efficiency of their operation. As a result of the survey a process flow scheme was suggested that ensured meeting the standard effluent quality for discharge into the public sewer. The process flow scheme of the Belgorog abrasive plant wastewater treatment is described in details; the expediency of using EKOTON advanced equipment – flotation unit and MDQ screw dehydrator is proved. On the basis of experimental data on raw wastewater and effluent quality the efficiency of treatment was calculated and the parameters required to choose the optimal operation mode of the local treatment facilities were determined. The measurement results showed that the wastewater treatment efficiency has been permanent for the entire period of observing the initial pollution concentrations. This fact gives evidence of the correct choice of the process flow scheme with account of the operating schedule of the plant, pollution form etc. The high efficiency (to 98.2%) of reducing the concentration of grease, oils and oil products proves the optimal chemical dosages and efficient wastewater treatment in the flotation unit. The flocculant consumption is less than 25 kg per month as dry matter at the wastewater flow rate to 6200 m3 per month.

Key words

wastewater , grate , grit chamber , dehydrator , local treatment facilities , flotation unit

DOI 10.35776/VST.2021.12.06
UDC 628.33

Kalachev D. A., Wolfgang Branner

Mechanical treatment of wastewater

Summary

The selection of equipment for mechanical wastewater treatment is an important stage in the reconstruction or new construction of the treatment facilities that determines their efficiency and reliability in terms of the technology and operation. The examples of the currently widespread technical solutions for designing filtering cloth of the screens for mechanical wastewater treatment are given. The effectiveness of these solutions is compared. On the basis of studying wastewater treatment facilities in Germany, a comparison of the debris retention efficiency depending on the applied filtration grade, i. e., two-dimensional (perforation) and one-dimensional (bar spacing) is presented.

Key words

wastewater , mechanical treatment , grate , removed screenings , bar space , perforation , two-dimensional cloth

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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 628.31.004.69

Rublevskaya O. N., Probirsky M. D., Lysova Tat’iana, Malysheva V. V.

The experience of the North wastewater treatment plant development and upgrade

Summary

The 25-year experience of operating and developing the North wastewater treatment plant in Saint-Petersburg is described. The stages of upgrading the wastewater treatment plant are presented: the first stage – complying with the Helsinki Recommendations on Baltic Marine Environment Protection (HELCOM) with regard to elimination of nutrients (nitrogen and phosphorus) from wastewater; the second stage – step-by-step 100% treatment of municipal wastewater from the combined sewage system by 2015 to comply with the HELCOM regulatory guidelines; the third stage – reduction of the volume and utilization of wastewater sludge. The improvement of the wastewater treatment plant provided for the upgrade of the facilities and equipment for wastewater mechanical treatment, sludge disposal, pretreatment of sludge mix before dewatering and other measures.

Key words

wastewater , nitri-denitrification , aeration tank , grate , grit chamber , sludge incineration , air blower , chemical phosphorus removal

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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.

Key words

wastewater , mechanical treatment , electric drive , grate , frequency converter , filter fabric , aeration station , hydro-press