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UDC 628.162.15
Skolubovich Iurii, 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.
Key words
clarification , sedimentation tank , utilization , deferrization , coagulation , rapid filter , wash water
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UDC 628.112.23:628.168.4
Tsabilev O. V., Strelkov A. K., Bykova P. G., Zanina Zh. V., Vasiliev V. V.
Treatment of Artesian Water for Domestic Water Supply
Summary
An example of solving the task of improvement of artesian water quality up to normative values with the help of baromembrane technologies is given. A flow chart of water treatment for household needs of a settlement optimal from the ecological and economical points of view is described. The comparative results of the technological calculation of various schemes of water demineralization and softening including the processes of ion exchange, nanofiltration and reverse osmosis are presented.
Key words
deferrization , reverse osmosis , softening , selectivity , nanofiltration , ion exchange
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DOI 10.35776/VST.2022.04.02
UDC 628.161.3:628.168.3
Seliukov Aleksandr, Raff P. A., Mishina T. F.
Pre-project in-process testing river water purification in the Arctic Circle
Summary
The results of pre-project in-process testing purification of water of the Vary-Khadyta River, the source of drinking and domestic water supply for the village of Yar-Sale (Yamal-Nenets Autonomous Okrug), are presented. Throughout the year the permissible concentration of iron, manganese, suspended solids and compounds in the river water that cause the water color is exceeded. Low temperatures, alkalinity and salinity result in the low level of water stability (Langelier index from –3.8 to –1.1 points). Water treatment facilities in Yar-Sale village (WTF-50) do not provide for the standard quality of purified water. This due to both incorrect water treatment technology that involves only filtration for clarification, and an incomplete set of chemicals required to produce drinking water. During the upgrade of the treatment facilities replacing the technology with the traditional clarification flow scheme (sedimentation – filtration) because of the periodic use of high doses of coagulant, as well as supplementing the chemical treatment with processes of alkalization and oxidation of the river water manganese with potassium permanganate was proposed. To assign the design modes of chemical water treatment, in-process tests were carried out under the conditions of the WTF of Yar-Sale village. For clarification and color removal, the chemicals used at the WTF of Yar-Sale village were applied (POHA «Aqua-Aurat-30TM» coagulant, flocculant Praestol 2530). It is shown that using only these chemicals did not provide for the standard quality of drinking water. To enhance the efficiency of purification, it is proposed to carry out chemical treatment in two stages: upstream the sedimentation tanks – alkalization, coagulation and flocculation, then upstream the filters – additional alkalization, oxidation of manganese with potassium permanganate and additional flocculation. The operational doses of chemicals were determined, that ensure the production of stable drinking water meeting the requirements of the current regulatory documents. Based on the test results obtained, a standard operating procedure for designing the upgrade of the WTF-50 of Yar-Sale village was developed.
Key words
deferrization , potassium permanganate , demanganization , river water , stabilization treatment , soda ash , color removal , «Aqua-Aurat-30тм» , Praestol 2530
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UDC 628.161
Moiseev A. V., Troshkova E. A.
Industrial-scale tests of an injection aeration system at the Velizhan water deironing plant in Tyumen
Summary
Tsurumi submersible jet injectors were suggested for the installation in the channels of the rapid filters of the first process line at the Velizhan water deironing plant operated by Tyumen Vodokanal JSC; for the second process line it was recommended to dismantle the polyethylene pipe aeration system in the deaerator-degasifier and to replace the air blower with advanced economically efficient submersible impeller aerators. The engineering solutions were proved by the industrial-scale tests carried out on-site. The results of the water quality analyses before and after retrofitting the advanced aeration system are presented. The approximate evaluation of the power efficiency and cost saving when using submersible impeller and jet aerators is given.
Key words
deferrization , aeration , rapid filter , power saving , air blower , impeller aerator , jet aerator
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UDC 628.161.3:628.169
Karmalov A. I., Naimanov A. Ia., Martynenko Grigorii, Naimanova Asiiat
Reconstruction of the facilities for reusing wash water
from de-ironing plant filters
Summary
The object of the study is wash water from multi-layer rapid filters of a deironing plant and flocculant solution used for the wash water treatment. The purpose of the work is developing an optimal process flow scheme for the treatment of wash water for the subsequent reconstruction of the facilities for wash water treatment at the deironing plant in Tomsk. In the course of work, experimental studies were carried out of the interaction of the wash water generated after washing the rapid filters of the artesian water deironing plant in Tomsk with flocculant solution of various concentrations. As a result of the study, the optimal process flow scheme for the wash water treatment was selected; the dose of the flocculant solution was 0.3 g/m3 and the concentration of the flocculant solution was 0.05%. The extent of adoption was as follows: the results of the work were used in the reconstruction project of the wash water treatment facilities at the de-ironing plant in Tomsk. The data on the flocculant dose and concentration of the flocculant solution will be used in the operation of the facilities after the reconstruction. The effectiveness of the flocculant solution is determined by the degree of water clarification visually and in a lab environment by determining the concentration of iron oxide in clarified water. The economic efficiency of the selected process flow scheme is due to the return of 7200 m3/day of water for reuse saving more than 7% of the daily costs for water abstraction.
Key words
settling , sedimentation tank , deferrization , sludge , flocculant , wash water treatment , повторное использование
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DOI 10.35776/MNP.2020.02.01
UDC 628.16.081:542.943-92
Seliukov Aleksandr, Rakhimov V. V.
Reconstruction of the ground water treatment plant
in Noyabrsk (Yamal-Nenets Autonomous Okrug)
Summary
The main results of technological surveys that form the basis for the project of reconstruction of the ground water treatment plant in Noyabrsk (Yamalo-Nenets Autonomous Okrug) are presented. The plant was built according to the project of DAR/VODGEO CJSC (Moscow) and commissioned in September 2006. The plant uses a new technology that provides for the sequential treatment of water with two oxidizing agents – hydrogen peroxide and potassium permanganate to remove iron and manganese compounds. The project shortcomings and incomplete implementation of design solutions complicate the regular operation of the plant and make it difficult to ensure the standard quality of drinking water. It was stated that ground water contained hydrogen sulfide in concentrations up to 0.1 mg/dm3, which required extra consumption of chemicals. Manual dosing of chemicals causes significant deviations from the required doses: from –14.5 to +19.1% for hydrogen peroxide and from –8.5 to +9.1% for potassium permanganate. It is pointed out that crude products of potassium permanganate produced by the P. R. China used as a chemical agent in drinking water supply, pose a threat of increased toxicity of drinking water. The determined value of the Langelier index (index of saturation with calcium carbonate) of ground water (–2.35 units) allowed to conclude that stabilization treatment by alkalization is required. The performed test water treatment with hydrogen peroxide and potassium permanganate in combination with alkalization showed that this process provided for achieving the residual concentrations of manganese < 0.1 mg/dm3 and total iron 0.1–0.15 mg/dm3 in the absence of residual hydrogen sulfide. However, to produce water of constant standard quality, high accuracy of chemical dosing is required that can only be provided by completely automated dosing. The project of upgrading the ground water treatment plant in Noyabrsk designed on the basis of technological research, allows to resolve the existing problems and ensure the standard quality of drinking water.
Ключевые слова
deferrization , ground water , hydrogen peroxide , potassium permanganate , demanganization , stabilization treatment , caustic soda , hydrogen sulfide removal
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UDC 628.161.004.6
Meshengisser Yu. M., Ulchenko V. M.
Retechnologization and Reconstruction of Water Treatment Systems
Summary
Basic propositions of the concept of water treatment systems retechnologization and its distinctions from retechnologization of wastewater treatment facilities are stated. Recently in the course of reconstruction of water supply facilities growing attention is paid to ecological aspects of their operation and such reconstruction is practically impossible without retechnologization. The process of retechnologization of water treatment and treatment of sediment of natural high- colored and slightly turbid water is described on the example of the State Unitary Enterprise PO Sevmash in the city of Severodvinsk of the Arkhangelsk Region. In the city of Sharya the EcopolymerGroup has executed the retechnologization of the water supply station with the aim to increase the capacity of operating facilities. The reconstruction of water supply treatment facilities in the city of Kovel (Ukraine) has made it possible to reduce iron content in potable water and improve operation characteristics of the facilities.
Key words
potable water , turbidity , reconstruction , deferrization , chromaticity , retechnologization , drains , aluminium salts , thin layer sedimentation , clarifiers with suspended sediment , rapid filters
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UDC 628.112:628.16.069
Zhoulin A. G., Belova L. V.
Carbon dioxide reduction in the ground waters in a baffled degasifier
Summary
The results of investigating carbon dioxide reduction in the ground waters of Tyumen Region in a bubble degasifier with horizontal baffles are shown. The efficiency of carbon dioxide removal is 70–75%. To intensify dissolved gas stripping a bubble degasifier design equipped with horizontal guide rails has been offered where the increase of the air utilization factor is ensured by modifications in the structure and route of air bubbles movement in water. Calculated relationships for determining the required number of baffles in the degasifier and residual concentration of carbon dioxide at 20 m/h countercurrent flow are identified. A nomograph for determining residual concentration of carbon dioxide together with procedure of designing the baffled degasifier are given.
Key words
deferrization , ground water , carbon dioxide , bubble type degasifier , baffled degasifier , desorbtion , specific air consumption
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UDC 628.161.2
DOI 10.35776/VST.2024.02.01
Rublevskaya O. N., Gvozdev V. A., Portnova T. M., Sazanova N. I., Davidovich Anastasiia, Vitkovskaia Raisa, Nesterova Tat’iana
Theory and practice of the deferrization and demanganation technology: experience of the Republic of Belarus and Russian Federation (part 1)
Summary
The paper dwells upon the analysis of methods for removing iron and manganese from groundwater at water treatment facilities with the justification of each stage of the process flow scheme based on the physical and chemical process patterns. Information is presented on the factors effecting the composition of groundwater, on the theoretical foundations of the physical and chemical processes of deferrization and demanganation, and on the technology innovations. An estimation of the efficiency of the operating water treatment facilities in the Republic of Belarus and Russian Federation is given. The paper confined to the 150th anniversary of the Minskvodokanal Unitary Enterprise corroborates the cooperation of water utilities of the two neighboring states that have similar geochemical characteristics of the aquifers.
Key words
deferrization , bioreactor , demanganization , catalytic media , contact-sorption and pressure filtration facilities , cavitation unit
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UDC 628.161.2
DOI 10.35776/VST.2024.03.02
Rublevskaya O. N., Gvozdev V. A., Portnova T. M., Sazanova N. I., Davidovich Anastasiia, Vitkovskaia Raisa, Nesterova Tat’iana, Gusev Aleksei
Theory and practice of the deferrization and demanganation technology: experience of the Republic of Belarus and Russian Federation (part 2)
Summary
The paper dwells upon the analysis of methods for removing iron and manganese from groundwater at water treatment facilities with the justification of each stage of the process flow scheme based on the physical and chemical process patterns. Information is presented on the factors effecting the composition of groundwater, on the theoretical foundations of the physical and chemical processes of deferrization and demanganation, and on the technology innovations. An estimation of the efficiency of the operating water treatment facilities in the Republic of Belarus and Russian Federation is given. The second part of the paper confined to the 150th anniversary of the Minskvodokanal Unitary Enterprise corroborates the cooperation of water utilities of the two neighboring states that have similar geochemical characteristics of the aquifers.
Key words
deferrization , bioreactor , demanganization , catalytic media , contact-sorption and pressure filtration facilities , cavitation unit
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DOI 10.35776/VST.2022.08.02
UDC 628.161
FESENKO L. N., Ignatenko S. I., Fedotov R. V., Shchukin S. A., Kaberskaia Dar’ia, Paukova Dar’ia
The technology of two-stage purification of water with high concentration of iron and manganese
Summary
The results of laboratory studies and field tests of iron removal combined with the demanganation of underground water at the local treatment facilities of the Makhin farm in the Rostov Region are presented. The effect of iron removal and demanganation of underground water in the process flow scheme with artificial aeration, oxidation and subsequent one- and two-stage filtration has been established. The injection points and optimal doses of potassium permanganate and coagulant in the two-stage filtration scheme were determined. A process flow scheme of iron removal combined with the demanganation of underground water with iron content from 10 to 15 mg/dm3 and manganese concentration up to 3.2 mg/dm3 is proposed.
Key words
deferrization , demanganization , nonchemical underground water treatment , local water treatment facilities , two-stage filtration
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UDC 628.161.2:546.(711+72)
Zhurba M. G., Savelyev S. P., Ourousov D. Yu., Gabliya Yu. A., Diachuk Sergei, Lykov V. V., Parusov Denis
Improving the technology of deironing and demanganation of the underground waters in Ulyanovsk
Summary
An improved design of two-stage technology of deironing and demanganation of underground waters with the use of floating polystyrene foam media at the Ulyanovsk water treatment facilities was suggested and tested. At the first stage the processes of aeration-degassing, contact filtration and filtration rate regulation of the second stage filters are carried out. It was established that manganese removal from the underground water of Arkhangelsk water intake can be carried out only by additional dosing 0.6–0.8 mg/l of 4–5% potassium permanganate solution before the filters of the second stage. In doing so the time of chemical being in contact with the filter media of the second stage can be reduced from 20 to 4–5 minutes.
Key words
deferrization , ground water , oxidation , demanganization , catalyst , bioreactor filter , floating polystyrene foam media
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