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Number 9 / 2021
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DOI 10.35776/VST.2021.09.01
UDC 628.1(091)
Egorova Yu. A., Strelkova T. A., Nesterenko O. I.
History of the creation and development of the water supply in Samara
Summary
The history of the creation and development of the water supply in Samara is presented. It is difficult for a modern resident of a large city to understand now; however, for several centuries Samara has experienced serious problems due to a persistent deficit of water. Numerous water carriers on horse-drawn carriages in barrels and other containers delivered water to the city located between two rivers. Samara was helpless before the fires that regularly flared up in it that resulted in almost entire city burning out. This situation preserved almost until the end of the 19th century. There were attempts, however unsuccessful, to build a water supply system in Samara. In 1881, the Zodchii magazine announced a competition to draw up a technical project for a water supply system for the city of Samara; in June 1883, 11 projects were submitted for the competition. After appropriate reviewing, the first prize of 3000 rubles was awarded to the project by engineer Nikolai Petrovich Zimin, the head of the Moscow water supply system. The construction of the Samara water supply system started immediately after the signing of an agreement with the company «Trading House of Brothers Bromley and Co.» for the execution of works. And already on October 1, 1886, the water supply to the main streets of the city began. Owing to the unique engineering solutions of N. P. Zimin, the first fire-fighting water supply system in Russia, equipped with a state-of-the-art-infrastructure was commissioned in Samara. At that time, only a few cities in Europe had this marvel of engineering. Now the history of the Samara water supply system goes back 135 years. To preserve the history of the creation of the municipal water supply system, «Na Dne» («At the Bottom») museum of the history of the Samara water supply system has been operating since July 13, 2018 at the premises of the municipal water treatment plant. The modern water supply system of the Samara urban district supplies drinking water to more than 1.2 million residents. Development continues.
Key words
water supply system , history of the creation of the Samara water supply system , museum of the history of the Samara water supply system , research and educational center
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DOI 10.35776/VST.2021.09.02
UDC 628.1/.3:334.72
Biriukov V. V., Rakitskii D. S., Petropavlovskii S. A.
Improvement and development of the water supply and wastewater disposal systems in Samara
Summary
Information is presented on the development by the specialists of «Samarskie Kommunal’nye Sistemy», LLC, of an investment program for the construction, reconstruction and upgrade of the municipal water supply and wastewater disposal systems in the Samara Urban District for 2019–2023 in accordance with the «Concept of Development and Reconstruction of the Water Supply and Wastewater Disposal Systems in the Samara Urban District for 2018–2047». For the period of the public-private partnership 2013–2019 «Samarskie Kommunal’nye Sistemy», LLC has implemented the program of constructing, reconstructing and upgrading the public water supply and wastewater disposal systems in the Samara Urban District worth a total of 2.15 billion rubles. During this time the equipment at the pumping filtration stations, boosting pumping stations, and at the municipal wastewater treatment facilities in Samara has been renewed; 65.4 km of the water distribution network and 34.5 km of the sewer network have been relayed. The implementation of the investment program will provide for improving the quality and reliability of the cold water supply, reducing technological damages and failures at the water supply and wastewater treatment facilities in the Samara Urban District, and ensuring the technical ability to connect new construction facilities.
Key words
reliability , quality , Public-Private Partnership , investment program , public water supply and wastewater disposal systems , concept of the development and reconstruction , reconstruction and upgrade of the water supply and wastewater disposal systems
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DOI 10.35776/VST.2021.09.03
UDC 628.1/.3:37.013.32
Biriukov V. V., Strelkov A. K., Shuvalov M. V., Gridneva M. A.
Research and Educational Center at the enterprise is the key
to the successful activity as a resource provider
Summary
Information on establishing the Research and Educational Center «Engineering Utility Systems» of the Academy of Civil Engineering and Architecture of the Samara State Technical University in «Samarskie Kommunal’nye Sistemy», LLC is presented. The principle of interaction in the organization of the educational process at the Academy of Civil Engineering and Architecture in «Civil Engineering» school, the profile «Water supply and wastewater disposal» (Bachelor’s degree) and in «Civil Engineering» school, the training program «Water supply of cities and industrial enterprises», «Wastewater disposal and treatment», «Improvement of technologies for water purification and sludge treatment» (Master’s degree). The information on the expediency of widespread introduction of the individual training element into the educational process is presented. Research and educational centers in the higher education system provide for training of highly qualified specialists in the field of water supply and wastewater disposal, and increasing their competitiveness in the labor market.
Key words
research and educational center , resource provider , engineering utility systems , educational process
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DOI 10.35776/VST.2021.09.04
UDC 006.3:628.1
Egorova Yu. A., Bykova P. G., Talovyria Larisa, Strelkova T. A., Nesterenko O. I.
On the introduction of new sanitary and epidemiological requirements for drinking water supply
Summary
The main source of water supply for the urban district of Samara is the Saratov reservoir. The municipal water treatment facilities were built according to the standard design and intended for clarification and disinfection of moderately polluted water. In recent years, a sharp decrease in the concentration of suspended solids and an increase in the concentration of organic pollutants (mainly of natural origin) have been observed in the water of the source. At low water temperature, high color indices and permanganate index, the need arises for continuous monitoring the optimal doses of chemicals in order to prevent the formation of residual aluminum in the purified water and permanganate index exceeding the MPC values in accordance with SanPiN 2.1.4.1074-01. By Decree of the RF Chief Sanitary Officer No. 3 of January 28, 2021, new sanitary rules and regulations have been approved and effective in the Russian Federation since March 1, 2021: SanPiN 2.1.3684-21 and SanPiN 1.2.3685-21 that require a more stringent approach to the quality of the purified water. The validity period of the current SanPiNs is until March 1, 2027; however, they do not provide for a transitional period for the operators of water supply and wastewater disposal systems that have to arrange and conduct epidemiological (preventive) measures to ensure drinking and domestic water supply meeting the requirements of SanPiN 2.1.3684-21 and SanPiN 1.2.3685-21. The water treatment facilities in Samara in the transition period need upgrade, and some of them need reconstruction. To carry out the research specified in the regulatory documents, updating the equipment of production laboratories and expanding the scope of their accreditation are needed. Equipping accredited laboratories with advanced means of comprehensive monitoring of drinking water quality will improve the efficiency and reliability of the analysis results.
Key words
turbidity , chromaticity , water treatment , water quality , pumping-filtration station , residual aluminium , permanganate oxidizability , sanitary regulations and standards
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DOI 10.35776/VST.2021.09.05
UDC 628.345.1
Egorova Yu. A., Stepanov S. V., Nesterenko O. I., Strelkova T. A.
Study of the chemical removal of phosphorus at the municipal wastewater treatment facilities of the Samara urban district
Summary
The parameters of the chemical removal of phosphorus from wastewater in Samara have been determined. The studies were carried out by the method of trial coagulation of raw wastewater, primary effluent and mixed liquor from the aeration tanks. It was found that at the same doses of the chemical, the enhanced removal of phosphorus occurs from the sludge mixture. While using aluminum sulfate, the removal of phosphorus phosphates was enhanced by 0.3–1.6 mg/l more than while adding Aqua-Aurat-30TM aluminum polyoxychloride, depending on the initial concentrations. The concentration of residual aluminum in the effluent while using Aqua-Aurat-30TM was on average 8% lower than while using aluminum sulfate – 0.168–0.221 mg/l versus 0.173–0.274 mg/l. Comparative results of the chemical coagulation with the use of flocculants and without them showed that additional dosing flocculant did not result in an increase in the efficiency of phosphorus removal. It was determined that to achieve above 85% treatment efficiency at a phosphorus-phosphate concentration in the mixed liquor of 3.7–5.2 mg/l, a 1.3–1.8-fold excess of aluminum sulfate was required, and at lower concentrations of 1.23– 1.87 mg/l, this efficiency was achieved only with a 3.1–5-fold excess of the chemical. The research results were used in the project of upgrading a tertiary treatment plant at the Samara wastewater treatment facilities, that provided for the chemical removal of phosphorus in addition to the enhanced process of biological removal of phosphorus. The accepted calculated dose of aluminum sulfate 10 mg/l for a commercial product will reduce the concentration of phosphates after the main stage of biological treatment from 0.53 to 0.2 mg/l.
Key words
wastewater , flocculant , sewerage treatment facilities , aftertreatment , chemical phosphorus removal , coagulants
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DOI 10.35776/VST.2021.09.06
UDC 628.355.1
Mashchenko Zinaida, Bakharev Vladimir, Egorova Yu. A., Nesterenko O. I., Русских Я. М.
Effect of benzylpenicillin sodium salt on the species composition of activated sludge biocenosis
Summary
The species composition of activated sludge depends on many abiotic and biotic factors. To date, there is a problem of the presence of trace pharmaceuticals in wastewater that negatively affect the organisms of activated sludge performing biological water treatment. Antibiotics are drugs that cause disturbances in the metabolism of activated sludge and lead to a decrease in the level of water treatment. These substances inhibit the survival and reproduction of some types of organisms, and also result in the development of resistance in bacteria. The results of studies on the effect of benzylpenicillin sodium salt on hydrobionts of activated sludge with single and repeated exposure within 72 hours are presented. The general properties of the sludge – color, smell, bulking, sedimentation – were estimated. To study the sludge biocenosis, we used the «crushed drop» method with a magnification of ×1000. While analyzing the microscopic slides, the number of hydrobionts of activated sludge and their general condition were taken into account. The following species were used as indicator organisms: naked amoeba Amoeba, testate Testacea, flagellate Flagellata, rotifers Rotaria, infusoria Vaginicola, Epistylis and Aspidisca, worms Nematoda and Oligоchaeta, tardigrades, filamentous bacteria. The obtained data testified to the satisfactory operation of the activated sludge under the experimental conditions. However, with repeated addition of benzylpenicillin sodium salt, the nitrification processes may deteriorate.
Key words
aeration tank , activated sludge , wastewater biological treatment , antibiotics , municipal wastewater treatment facilities , benzylpenicillin sodium salt , hydrobionts of activated sludge
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DOI 10.35776/VST.2021.09.07
UDC 628.32
Egorova Yu. A., Kichigin V. I., Nesterenko O. I., Iudin Aleksandr
Wastewater sludge treatment at the municipal wastewater treatment facilities with the purpose of its further utilization
Summary
Sludge from the municipal wastewater treatment facilities is the most massive technological waste that causes trouble for any city. Possible methods of wastewater sludge treatment at the municipal wastewater treatment facilities of the Samara Urban District with the purpose of its further utilization are considered. The reasons are indicated and documentary evidence of the incorrectness of assigning the responsibility for processing such wastes only to the water and wastewater utilities is provided. The method of landfilling dewatered wastewater sludge in a ridged landfill is considered. It has been established that the sludge processed at the wastewater treatment facilities is referred to the V class of environmental hazard. Sludge subjected to the treatment, stabilization, drying and neutralization (low hazardous sludge from grit chambers for domestic and mixed wastewater treatment; almost non-hazardous sludge from grit chambers for domestic and mixed wastewater treatment and excess sludge from biological treatment facilities mixed with raw sludge) can be used as fillers for concrete-cement mixtures and organo-mineral fertilizers or transferred for disposal to outside companies.
Key words
dehydration , sludge beds , landfill , sludge of mixed domestic and industrial wastewater , landfilling method , organo-mineral fertilizer
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DOI 10.35776/VST.2021.09.08
UDC 628.179.36:004.415.53
Egorova Yu. A., Konevskii E. V., Vas'kovskii A. V., Zaiko V. A.
Implementation of electronic models of water supply
and wastewater disposal systems
Summary
Since 2013, «Samarskie Kommunal’nye Sistemy», LLC, within the framework of the implementation and development of electronic models of water supply and wastewater disposal systems, acquired the software, arranged the process of certification and updating of water distribution and sewer networks, tested various methods of detecting latent water losses in the water distribution networks using the results of hydraulic modeling, assessed various promising measures for the development of the water supply and distribution system and wastewater disposal, developed an algorithm for the interaction of various software products and employees working with them, carried out measures on meeting the requirements for the protection of information related to the National Security Information, developed measures to maintain previously achieved results in eliminating water losses. Currently, full-scale detailed hydraulic models of the water supply and wastewater disposal systems are being developed, a mechanism is being tested for transferring data from the sales department on the volumes of provided services directly to the hydraulic model.
Key words
hydraulic design , electronic model , water leak detection , certification of the water distribution and sewer networks
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DOI 10.35776/VST.2021.09.09
UDC 620.1/.2:681.518.3:65.012.45
Iakovlev Igor’, Egorova Yu. A., Бирюков Т. В.
Experience in introducing and operating a system of automatic water meter reading
Summary
The issues of introducing a software package for automatic remote water meter reading and the workflow process in this respect are considered. The specific features of the currently existing information technologies for data transmission used in the so-called «smart» metering devices are described. The problem points of the implementation of such systems in resource supplying companies and the advantages that can be gained as a result of using the software package are noted.
Key words
water meter , remote reading of a water meter , GSM network , LoraWan , NB-IOT
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