Tag:sedimentation tank

№8|2014

DRINKING WATER SUPPLY

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UDC 628.161.3.001.891.53

Strelkov A. K., Egorova Yu. A., Bykova P. G.

Selection of most efficient chemicals for water treatment

Summary

The Saratovskoe water reservoir has been the main water source of the Samara public water supply. The municipal water treatment facilities have been built after typical projects and designed for clarification and disinfection of moderately polluted water. Lately sharp suspended solids reduction and organic pollution increase (mainly of natural origin) in the water source have been observed. During flood periods technogenic pollution (surfactants) is present, the concentration of manganese increases, phenol is found. At low water temperature, high color and permanganate value higher doses of chlorine and coagulant are required. Coagulation at low temperatures is inhibited which results in the concentration of residual aluminium and permanganate value exceeding the maximum permissible levels. Higher chlorine dosages cause higher concentrations of chloroorganics in water. Therefore a chemical for using during flood periods that will provide for the required quality of water shall be selected. The results of the laboratory studies of selecting the chemical type and optimum dosage for water purification from the Saratovskoe water reservoir during flood periods are presented. Eighteen coagulant trademarks manufactured by domestic and foreign producers were investigated. The optimum dosages of coagulant and flocculant were defined. From the coagulant samples presented two were selected that could provide for the maximum drinking water clarification at minimum levels of residual aluminium and permanganate value. The final choice can be made on the basis of the technical and economic calculations taking into account the chemical price, delivery cost and required water quality.

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№9|2014

WASTEWATER TREATMENT

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UDC 628.353

Chesalov S. M., Lion Iu. A., Ptitsyn V. V., Malozemov A. V.

Gabion filtration facilities for surface runoff treatment

Summary

The design and characteristics of gabion filtration treatment facilities developed and designed by the specialists of «ECOLANDSHAFT-XXI century» NPO LLC are presented. The analysis of wastewater and effluent samples collected at different seasons of the year from the inlet and outlet of the different gabion facilities showed that the efficiency of treatment both in terms of suspended solids and oil products and COD, BOD5 met the maximum permissible pollutant concentrations set for fishery waters. Gabion facilities are open gravity facilities, which do not require any chemicals, pumps, electricity or premises for their operation. They include two sections, each of them having four treatment stages: accumulating settling tank; filtration chamber with granular bed; bioplato; filtration chamber with sorbent. Gabion facilities include bioplato as a mandatory and very important element for treatment which is a shallow impoundment seeded with macrophytes and which ensures removing a number of pollutants. Due to the use of gabions, bioplato and chemical free treatment the gabion facilities can be qualified as nature like facilities which can be retrofitted into the landscape and have an attractive look becoming a part of the landscape. By now more than 120 gabion filtration treatment facilities with up to 15 years service time have been designed and built. The facilities provide for the treatment of surface runoff from highways, industrial sites of technology and industrial parks.

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№4|2016

SLUDGE HANDLING

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UDC 628.169

Ryltseva Yu. A., Butko D. A.

Study of the quality of supernatant separated in the process  of sludge thickening at the water treatment plant in Rostov-on-Don

Summary

The results of studying the qualitative and quantitative composition of supernatant separated from the sludge after sedimentation tanks washing at the water treatment plant in Rostov-on-Don. The chemical water analysis carried out in accordance with Standard Methods showed that the given effluent type does not meet the requirements set to the discharge into the municipal sewer and poses a threat to the environment. In connection with this the technology of wash water reuse was chosen as the most efficient under the given conditions. It provides for the effluent returning into the mainstream of the water to be treated or using it for the water plant needs. At that the effluent organoleptic properties shall be considered: at 5 hours sedimentation of sludge with 5–40 g/dm3 concentration it can be classified as low-turbid, medium or high colored (depending on the season of sludge generation in the sedimentation tanks). Increasing the time of supernatant retention above the sludge (up to 120 hours) insignificantly improves the clarification and decoloration efficiency that is indicative of the presence of highly dispersive and dissolved substances highly resistive to sedimentation in supernatant. Impro­ving significantly the supernatant quality is possible by sludge pre-conditioning with lime or cationic polyacrylamides.

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№10|2016

WASTEWATER TREATMENT

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UDC 628.35:661.5

Nikolaev Yu. A., KOZLOV M. N., Gavrilin A. M., Kevbrina M. V., Pimenov N. V., Dorofeev A. G., Agaryov A. M., Kallistova A. Iu.

Innovative energy efficient and resource-saving technology of removing ammonium from wastewater under anaerobic-anoxic conditions

Summary

The specialists of «Mosvodokanal» JSC have developed the technologies of ammonium oxidation under anoxic conditions: double-reactor for low temperatures and single-reactor for 30–37 °С. The technology for the operation at 10–25 °С is performed by bacteria (discovered in «Mosvodokanal» JSC) Сandidatus Аnammoxomicrobium moscowii, fixed to the bed. The rate of nitrogen removal is 50 g/(m3·day) of the reactor. The technology for warm wastewater treatment is performed by new bacteria Сandidatus Jettenia moscovie­nalis, fixed to the bed; the rate of nitrogen removal is 0.47 kg/(m3·day). The use of continuous flow and fixed feed increases the output of the reactor to 0.8 kg/(m3·day). Considering the high economic attractiveness and efficiency of the technology it could be expected that in the very near future the technology will become a frequent practice in wastewater treatment. For the development of the industrial-scale technology a grant was awarded within the frames of the Federal special-purpose program «Research and development for the priority orientations of the development of the scientific and technology sector in Russia for 2014–2020». The work is carried out in cooperation with Federal Research Centre «Fundamentals of Biotechnology» of the Russian Academy of Sciences in Vinogradskii Institute of Microbiology business unit. A pilot plant with a 20 m3 reactor has been assembled, commissioned and operated at the Liuberetskie wastewater treatment facilities in Moscow of a treatment capacity of 20 m3/day of dewatering centrifuges filtrate.

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№06|2015

WASTEWATER TREATMENT

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UDC 628:339

Korziukov N. I., Zviagin G. K., Os'kin D. V.

WAMGROUP® Company – 10 years in Russia

Summary

WAMGROUP® Italian Company has been among world leaders in developing and manufacturing equipment for mechanical treatment of wastewater. The specialists of the company offer a number of innovative solutions that meet the specific demands of the companies designing water wastewater treatment facilities. The information on the implemented project of wastewater treatment facilities in Bokino village of the Tambov Region in the Tambov Area with the use of GCP mechanized screw screens is presented. The process line consists of several wastewater treatment stages including mechanical (removal of coarse litter and sand), biological (removal of organics and nutrients), and several stages of tertiary treatment, sedimentation and filtration. At the final stage of the process line the effluent is UV disinfected and discharged into the Tsna River. Commissioning the newly built wastewater treatment facilities provided for improving the living conditions for the residents, the ecological state of the Tsna River which is the main waterway in the Tambov Area, and the safety and quality of the beaches in the city of Tambov.

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№1|2010

PROBLEMS, PERSPECTIVES

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UDC 628.33.001.2

Simulation and Calculation of Sedimentation Tanks

Summary

Results of the study of processes of water treatment for suspended substances are presented. In the course of calculation of facilities and apparatuses used for extraction of the suspended phase of contamination, it’s necessary to take into account its disperse composition, density, concentration, surface properties of the liquid phase and the indicator of flows dynamics.

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№2|2013

POTABLE WATER SUPPLY

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UDC 628.16.066.7

Volftrub L. I., Yegorov V. F., Staroselets L. N., Panicheva S. A., Lashmanova E. O., Yunok S. A., Moulikov R.

Upgrading flocculation tanks, settling tanks and clarifiers at the water treatment plants

Summary

The methods of improving the design of flocculation tanks, settling tanks and clarifiers with floc blanket based on the use of thin-layer – recirculating flocculation and thin-layer precipitation processes are presented. When employed in new construction the footprint of the facilities is reduced 2–3 times; whereas during the upgrade of the existing facilities their capacity increases together with water quality improvement and reduction of chemical consumption. The design of thin-layer self-cleaning modules manufactured in bulk in the form of polyethylene honeycomb blocks of polyethylene film more than 250–300 μm thick is presented. The positive long-term experience of operating the upgraded facilities located at the public, industrial and power water plants that are purifying natural water of different quality and using different treatment technologies was consolidated.

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№2|2011

ENVIRONMENTAL PROTECTION

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UDC 628.32.004.69

Bagaev Yu. G., Veshkurtsev V. M., Gundyreva T. M., 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.

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№7|2010

PROBLEMS, PERSPECTIVES

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UDC 628.336.57:628.162.52

Butko D. A., Lysov V. A.

Determination of Rheological Properties of Water Supply Sediments in Facilities Directly

Summary

Design of an instrument and a method of calculation for the determination of rhelogical properties of sediments directly in settling facilities are presented. Regularities of the change of sediment resistance to displacement depending on the depth of its position and distance from the beginning of a settling tank are revealed.

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№9-1|2011

POTABLE WATER SUPPLY

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UDC 628.162.15

Skolubovich Yu. L., Voytov E. L., Karmalov A. I., Skolubovich Yu. L.

Treatment and Utilization of Wash Water of High-Rate Filters of Deferrization Stations

Summary

Issues of the intensification of coagulation treatment processes of wash water of the deferrization station’s high-rate filters are considered. Shortcomings of the existing flow chart of treatment and the reuse of wash water of filtration stations are exposed. The scheme of the unit and results of experimental studies for selection of an efficient reagent, treatment and utilization of filters’ wash water are presented. A new technology of reagent clarification and multiple use of deferrization station’s wash water is offered.

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№12|2010

WASTEWATER TREATMENT

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UDC 628.35: 661.5.63

Ospanov K. T., Elzhasov A. A.

Sewerage Treatment Facilities of the City of Astana (Kazakhstan)

Summary

The flow chart of biological treatment of municipal wastewater making it possible to increase the efficiency of removal of phosphorous compounds equally with the efficient removal of nitrogen compounds is offered. Advantage of this technology is possibility of reconstruction and modernization of operating treatment facilities with the maximum use of existing capacities. The technique of nitri-denitrification with a dephosphatation chamber is used at the operating facilities of the city of Astana. Zeolite of the Chankanayskoye deposit is used as a media. Zeolite intensifies the processes of advanced biological treatment of wastewater both for organic pollutants and biogenic elements.

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№7|2012

INNOVATIONS IN WATER SECTOR

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UDC 628.161

Domnin K. V., Arkhipova Е. Е., Dounayevskaya E. V., Aleshko D. S., Metelitsa E. K.

The use of advanced technologies at the Head water treatment facilities of the Khabarovsk water supply system

Summary

A project of constructing the second stage of the Head water treatment facilities of the Khabarovsk water supply system was developed. The project was designed with an account of the specific composition of the water source pollution and with the use of advanced water treatment technologies. The water treatment complex will include the following facilities: settlers and filters, powdered activated carbon addition and ammoniation stages, an upgraded pumping station at the outlet of the treatment facilities with UV-disinfection stage, an advanced bacteriological laboratory.

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№7|2014

WASTEWATER TREATMENT

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UDC 628.31.004.69

Streltsov S. A., Belov N. A., Klimova L. A., Pshenko N. L.

Reconstruction of the Novo-Kur’ianovo wastewater treatment facilities

Summary

The Kur’ianovo wastewater treatment facilities are the European biggest municipal wastewater treatment complex. Being an advanced project for its time (1970-ies) by the XXI century the Kur’ianovo wastewater treatment facilities turned to be obsolescent and needed upgrading. In 2010 the project of upgrading the first and second blocks of the Novo-Kur’ianovo wastewater treatment facilities was launched. The specific features of the design solutions of recovering the capacity of the engineering structures of buildings and facilities of the wastewater treatment plant, of retrofitting nutrients removal process are considered alongside with the aspects of reducing malodorous emissions from the open surfaces of the facilities. Special attention in the project is paid to the selection of process equipment – advanced sludge scrapers, sludge pumps, turboblowers and aeration systems were installed. For the first time floating covers of the primary settling tanks were applied.

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№7|2010

PROBLEMS, PERSPECTIVES

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UDC 628.33.004.6

Serebryakov D. V., Tuomikoski P.

Reconstruction of Typical Radial Settling Tanks with the Use of a Scraper System Finnchain

Summary

Difficulties of the operation of radial primary and secondary settling tanks with typical equipment for sludge removal (sludge disposal trucks IBR and sludge scrapers IPR) are stated. The scraper system Finnchain (Finland) devoids these shortcomings. A principle of operation of this equipment is described; basic operation data and its distinctions from analogues are presented.

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№10|2015

ADVANCED TECHNOLOGIES AND EQUIPMENT

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УДК 628.32/.336

Zhurba M. S., Fomin I. I., Levchenko O. V.

Development of high-technology wastewater treatment facilities on the basis of «Ecopolymer» equipment

Summary

«Ecopolymer» Manufacturing Company LLC has lately expanded both the production capacities and production portfolio. The Company is aiming at producing not just separate product types but complexes designed for complete cycle of process operations. The Company production program is presented. The designs of a belt filter-press, rack screens for fine treatment, a screw conveyor and a screw press for screenings, and a sludge pump are described. The basic specifications and advantages of the equipment manufactured by «Ecopolymer» Manufacturing Company LLC are summarized. The development and manufacture by the «Ecopolymer» production department of the control cabinets for the automation of the operation of the entire treatment facilities or their separate units has become a solid step in the control of the treatment facilities as a whole. The long-term Company’s experience provides for offering the customers ready-made solutions of the manufactured equipment layout with the visualization of the layout and harmonization of all the automated control systems for the equipment included into the complex.

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vstmag engfree 200x100 2

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Российская ассоциация водоснабжения и водоотведения

Конференция итог

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