Tag:permanganate oxidizability

№3|2020

DRINKING WATER SUPPLY

DOI 000000

UDC 628.17.001.4

Strelkov A. K., Egorova Yu. A., Bykova P. G., Nesterenko O. I., Strelkova T. A., Talovyria Larisa

The influence of the ecological state of the water source
on the mode of operation of water

Summary

While studying the water quality of the water source of the city of Samara – the Saratov water reservoir, special attention was paid to the main indicators that influence the choice of chemical treatment: turbidity, permanganate index and color. Seasonal changes in the water quality of the water reservoir require constant adjustment of the chemical dose in order to meet the regulatory requirements to the quality of treated water. The results of the studies of changes in the water quality of the Saratov reservoir at the water abstraction points of the city of Samara for 2017–2019 by turbidity, permanganate index and color are presented. Due to the abnormal temperature differences and onset of autumn flood (end of December 2019 and January 2020), the water quality in the water reservoir dramatically changed in color and permanganate index. It was noted that an increase in these indicators required an increase in the dose of chemicals during the source water purification. The optimal dose of chemicals is selected with Lovibond ET-750 flocculator depending on the composition of the source water. Regular test coagulation allowed maintaining the quality of purified water in accordance with the regulatory requirements of SanPiN 2.1.4.1074-01 «Drinking water. Quality control», except for color and total iron since the values of these indicators were increased within the measurement accuracy.

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№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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№8|2019

DRINKING WATER SUPPLY

DOI 10.35776/MNP.2019.08.04

UDC 628.1:543.31

Govorov O. B., Govorova Zh. M., Rudich Ul’iana

Changes in the quality of natural water from a public water supply source during transportation

Summary

The issues of the water quality transformation from a natural water supply source during transportation by long-distance water mains from the water intake to the water treatment facilities site and the reasons affecting the changes in the qualitative composition of water are considered. The results of the studies on the changes in the water quality of a natural water source characterized by low turbidity, medium color, seasonal growth of phytoplankton and the concentration of organic compounds are presented. It has been established that in certain periods of the year both the improvement and deterioration of the quality of water transported by water mains by several times occur in terms of the following indicators: permanganate value, total microbial count, phytoplankton count and biomass, resulting in several times increase in the pollution load on the treatment facilities and decrease in the efficiency of the water treatment process. Continuous monitoring and systematization of data on the changes in water quality will make it possible to timely adjust the modes and parameters of water treatment plants, thereby ensuring sustainable water treatment efficiency according to the regulatory requirements.

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№1|2016

DRINKING WATER SUPPLY

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UDC 628.161.3

Alekseev S. E., Alekseeva L. P., Kourova L. V.

Evaluation of the efficiency of different chemicals in removing iron and organics from underground water

Summary

The composition and quality of underground waters in different regions of Russia substantially differ. Most underground waters contain elevated iron concentrations. Iron from underground water that contains oxygen and high concentrations of organic substances (humic and fulvic acids) that cause the water color is most difficult to remove. Besides, in oil producing regions underground waters occur that contain pollutants of anthropogenic origin: oil products, phenols, amines etc. In the process of such water purification integrated methods shall be used to provide for eliminating organic and non-organic pollution. The results of the studies of removing iron complex organic compounds from underground water in the Nefteyugansk region by different chemical methods: oxidation, alkalization and coagulation are considered. The impact of the conditions of using chemicals on the underground water purification efficiency was determined. It was shown that in removing complex iron compounds from water strong oxidizing agents and alkalizing chemicals could be used. To eliminate humic substances and organic compounds of anthropogenic origin coagulating chemicals must be used.

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№1|2020

WASTEWATER TREATMENT

DOI 10.35776/MNP.2020.01.04
UDC 628.316

Belov S. G., Naumchik G. O.

Reuse of stained wash water for washing fabric after dyeing

Summary

The processes of aqueous work up of the fabric used at the textile enterprise «Svitanak» OJSC were studied during the fabric preparation, dyeing and subsequent washing. The quality of wash water at various stages of washing the fabric after dyeing was studied by such indicators as the color intensity by dilution rate, COD, permanganate index, foaming capacity and pH. Experimental data are presented that prove the possibility of using ozone for the purification of the wash water mixture from the last six fabric washings after dyeing to the requirements to the quality of water supplied to the dye-finishing processes. An approximate economic calculation has been performed that proves a high economic effect of establishing the reuse of wash water regenerated with ozone for washing fabric after dyeing.

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№8|2016

DRINKING WATER SUPPLY

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UDC 628.16.065.2

Strelkov A. K., Egorova Yu. A., Bykova P. G., Kichigin V. I., Nesterenko O. I.

Selection of efficient chemicals for low turbid water purification  from surface water sources

Summary

The results of laboratory study of selecting chemicals and optimal dosage for the purification of low turbid water of the Saratov water reservoir are presented. The laboratory tests of aluminium polyoxychlorides (14 kinds) and aluminium sulfate (16 kinds) were carried out. Coagulants manufactured by domestic and foreign manufacturers were studied. The optimal dosages of coagulants and flocculants were determined. Two of the coagulants studied were selected that could ensure the maximum degree of water clarification at the minimum concentration of residual aluminium and permanganate value in drinking water. It was stated that water treatment exclusively with coagulants with subsequent sedimentation and filtration ensured meeting the state drinking water standard. The results of the experimental studies of coagulation of low turbid water of the Saratov water reservoir showed that the maximum water clarification was achieved by sedimentation at the optimal coagulant dosage of 9.6 mg/dm3 for Al2O3 and 0.2 mg/dm3 flocculant dosage. At that the pollution loading on filters is reduced and the filter run increases.

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№10|2011

DRINKING WATER SUPPLY

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UDC 628.16.066.1(282.247.41)

Podkovyrov V. P., Arutyunova I. Yu., Yagunkov S. Yu., Shemyakin Yu. V., Strikhar Yu. V.

Technology of high-speed water clarification with the use of microsand

Summary

The Research & Development Centre of MPUE Mosvodokanal investigated a new process of high-speed water clarification. The presented technology is an upgraded option of the traditional technology of water clarification. It allows using the potential of coagulation-settlement processes to the maximum extent. These processes have been the vital stage of the water treatment technology. The results of the studies showed that the developed technology ensures more efficient color and permanganate oxidizability removal compared to the traditional water treatment process used; besides, it decreases drastically the concentration of residual aluminium in drinking water.

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№1|2018

WATER QUALITY CONTROL

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UDC 628.1/.2:543.31

Egorova Yu. A., Bykova P. G., Kichigin V. I., Nesterenko O. I., Strelkova T. A.

Ecoanalytical control and monitoring of the water quality
in Samara municipality

Summary

In Samara municipality the industrial control of natural and drinking water quality is carried out by an accredited water quality testing center. The control is executed according to the program developed by «Samarskie Kommunal’nye Sistemy» LLC and approved by the Samara Area Department of the Federal Service for Supervision of Consumers Protection and Welfare. The control is performed at all the stages of water treatment beginning from the water source to water posts in the distribution network. Monitoring the water conditions in the surface water source provides for controlling the treatment facilities operating mode and selecting the required chemical dosages at every stage of the treatment process. Industrial quality control of the wastewater coming to the municipal treatment facilities and of the effluent is carried out by a chemical and bacteriological accredited testing laboratory at every process unit from the recei­ving chamber to the discharge to the Saratov water reservoir (before the discharge the effluent is biologically tested for acute toxicity). Sludge generated in the process of wastewater treatment is tested at every stage for physical, chemical microbiological, parasitological, toxicological and radiological parameters. The efficiency of the biological treatment facilities is evaluated basing on the results of hyd­robiological analysis of activated sludge. The laboratory facilities and continuous renovation of the basic infrastructure are described. Special attention is paid to the laboratory staff development and achievements.

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