Tag:flocculation

№4|2019

DRINKING WATER SUPPLY

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UDC 628.16.065.2-926:628.16.094.413.094.3

Pokhil Yu. N., Bagaev Yu. G., Mamaev V. V., Novoshintsev V. N., Valuyskikh I. V., Zhagin V. A., Boldyrev Viacheslav Viktorovich, Shokolov A. N., Belousova T. V., Smirnov V. P.

Optimization of flocculation and chlorammoniation processes at the water treatment facilities of the city of Novosibirsk

Summary

The results of long-term studies to improve the design and operating parameters of the pumping-filtration stations in Novosibirsk are presented. The schemes of the developed processes and technical means for the enhancement of disinfection and flocculation are given. The results of research on improving the processes of mixing and flocculation to provide for reducing the consumption of coagulant by more than 50% without water quality degradation achieving precipitation of the major sludge amount in the flotation chambers and at the entry of the sedimentation tanks, respectively, reducing the pollution load on filters and water consumption for their backwash. Based on the results of the research on the improvement of the technology of chlorammoniation a predictable and well-controlled process has been developed with a guaranteed decrease in the concentration of chlororganic compounds within the limits of the MPCs as well as the elimination of chloramines with the highest degree of oxidation and nitrification. The process ensures the reduction of secondary water pollution and bacteriological and hydrobiological pollution of the water treatment facilities.

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№5|2010

PROBLEMS, PERSPECTIVES

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UDC 628.16.006.7

Volftrub L. I., Korabelnikov V. M., Gudoshnikova A. E.

Experience of Modernization of Settling Tanks and Clarifiers at Water Treatment Stations

Summary

Methods of the modernization of different designs of flocculators, settling tanks and clarifiers based on the use of thin-layer, recirculating flocculation and thin-layer deposition are presented. Advantages of the design of thin-layer cellular blocks developed by the authors and produced by the EcoholdingClosed Company are shown. Results of the long term (over 10 years) operation of modernized settling facilities in the systems of communal and industry water treatment at different compositions of natural water and various methods of their treatment are presented.

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№8|2011

POTABLE WATER SUPPLY

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UDC 628.161:536.22

Fomina V. F.

Features of Coagulation of Low Turbid, Color Water of the Vychegda Under Conditions of Low Temperature

Summary

Results of the reagent treatment of low turbid and color water of the Vychegda for the purpose of selection of the efficient method of its clarification is presented. The process of coagulation is characterized by the formation of small, poorly settling flakes. Low temperatures of water require increasing the optimal doses of coagulant almost two times and the optimal doses of flocculant more than two times. It is shown, that the water discoloration up to 5–10 degrees and its maximal clarification are achieved in and around of optimal pH values. The empirical dependences of a coagulant’s dose on influent water color with due regard for its temperature are given. The efficiency of low temperature water treatment depends substantively on flocculation process, the duration of which multiplies several times during the periods of water's low temperatures. Under these circumstances the pressure flotation is the most reasonable and efficient method of clarification.

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№8|2010

POTABLE WATER SUPPLY

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UDC 628.162

Getmantsev S. V., Linevich S. N.

Treatment and Disinfection of the Don’s Water at Contact Filters Using the Coagulant SKIF180of the Latest Generation

SUMMARY

The high efficient compact flowchart of treatment and disinfection of the Don’s water has been developed on the basis of experimental and theoretical studies carried out. In the process, mixers, coagulation chambers and sludge blanket clarifiers or settling tanks are eliminated from the scheme. The use of the method of contact coagulation with the high effective coagulant of SKIF™180 mark makes it possible to reduce reagent consumption by 65–70%, to exclude the necessity of primary disinfection of water with chlorine or reduce chlorine consumption to minimum, to ensure aluminum residual in water within the limits of MPC, to stabilize conditions of water treatment and reduce considerably the cost of water treatment.

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№07|2015

DRINKING WATER SUPPLY

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UDC 628.16.052.2

Potapov V. V., Brovkin A. E.

Improving natural water purification with the use of new generation chemicals

Summary

The main aspects of natural water purification with coagulation are considered. The data on the composition of the surface public water supply sources in the area of Petropavlovsk-Kamchatsky are presented. The average molecular weight of humus substances present in natural waters is determined. The results of experimental studies of using new generation coagulants and flocculants in natural water purification at the water treatment facilities of MUE «Petropavlovsk Vodokanal» are presented. The action of coagulants: aluminium sulfate, aluminium hydroxychloride and aluminium oxychloride was studied. It was stated that the maximum efficiency of color removal from natural water in the Petropavlovsk-Kamchatsky environment is provided by the use of aluminium sulfate and aluminium hydroxychloride; whereas the use of aluminium oxychloride was less efficient. The efficiency of turbidity removal when using all the three coagulants was high – 70–100%. Praestol 650 TR and Praestol 2515 TR flocculants at mutual dose testing improve the efficiency of color removal: Praestol 2515 TR – from 49–66 to 63–100%. The use of flocculants provided for improving the floc formation rate, floc size, floc sedimentation rate and sludge volume. To introduce the new advanced coagulant at the water treatment plant the coagulation process testing with the use of aluminium sulfate in combination with the flocculant is required. To eliminate possible formation of problem chlororganics before the coagulant takes effect and humus settles special attention shall be paid to the sodium hypochlorite injection point when coagulating high-colored water.

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Российская ассоциация водоснабжения и водоотведения

WST19 200x300

Конференция итог

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