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UDC 628.292.62-192
Il'in Iu. A., IGNATCHIK V. S., Ignatchik S. Iu., Melnik E. A., Probirsky M. D.
Influence of Tear-and-Wear of Vertical Pumps on Reliability, Safety and Power Consumption of Sewerage Pumping Stations
Summary
Results of the study of influence of tear-and-wear of vertical pumps on reliability, safety and power consumption of sewerage pumping stations on the example of the Main pumping station of the Central aeration station of St. Petersburg are presented. Principal points of the methods of calculation of reliability of pumping stations operation are expounded. The methodology formalized with the use of programs for a computer can be applied for concrete calculations of reliability of such pumping stations. The safety of a wastewater disposal system, conditions of urban human environment, ground water, water basins, and profitability of the SUE St. Petersburg Vodokanal’s enterprises depend on reliability of operation of stations with a designed discharge rate of up to 1,5 mill. m3/day.
Key words
reliability , sewerage pumping station , power consumption , safety , calculated hydraulic model
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UDC 628.292.003.13
Bazhenov V. I.
Customer benefit from the practical application of «7 = 2» initiative
Summary
The method of selecting pumping equipment by Life Cycle Cost (LCC) criterion – total cost of ownership is presented. The software that provides for calculating LCC criterion depending on the pump output is placed at www.7-2.su Web site. Submersible pumps are selected as a LCC calculation object because of their wide use at the sewage pumping stations under construction or subject to upgrade.
Key words
sewerage pumping station , impeller , electric power , submersible pump
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UDC 628.292:628.214
European experience in upgrading sewers
Summary
About 15 years ago a project of upgrading the sewer system of the Usedom Island (Germany) was launched. Since the island is a health resort the incoming wastewater in sewers has been characterized by seasonal variations: in summer the amount of wastewater increases approximately twice, whereas in winter the amount of wastewater is low; however of more aggressive quality. From economic considerations pressure sewers were chosen. The optimum pressure in the sewers even during high season is maintained by Wilo pumping units. Reliable and continuous operation of the pumps is provided by the use of Wilo – EMUport solid particle separation system.
Key words
wastewater , sewerage pumping station , pressure sewer , solid particle separation system
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DOI 10.35776/VST.2022.10.07
UDC 628.292
Razakov M. A.
Study of the thermal stress of the engine room of a municipal wastewater pumping station
Summary
The results of a study of the thermal stress of the engine room of a municipal wastewater pumping station in the cold period are presented. The main sources of heat and cold and their degree of impact on the thermal stress of the engine room are considered. The results of modeling heat inputs into the engine room from various heat sources located at the different functional levels of the room are presented. The thermal model takes into account the specific features of the technological process of a high-voltage wastewater pumping station, as well as space-planning solutions for the building under consideration in stationary thermal conditions. The calculation was carried out at a constant wastewater temperature assumed equal +25°C. For the first time, it was determined and proved that the machine room of a high-voltage wastewater pumping station can be classified as a room with high thermal stress.
Key words
sewerage pumping station , designing , water disposal system , engine room , thermal stress , modeling heat inputs
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UDC 628.29:66.013.6
DOI 10.35776/VST.2024.11.06
Davydov Igor’, Sheplev Dmitrii, Poselennov Vladimir, Nagornyi S. L.
Package of energy-efficient measures on the upgrade of the wastewater disposal system of the Urban District of Samara
Summary
The information on the upgrade of the wastewater pumping stations of the wastewater disposal system in the city of Samara is presented. The main methods and means of the step-by-step implementation of the upgrade are described. The values of monthly and annual electricity consumption by the pumping stations are given. A reduction in the electricity spent for pumping waste liquid is determined. As a result of the upgrade, the efficiency of the equipment operation has increased due to the acquisition of complete and reliable information on the parameters of technological processes in real time mode. The introduction of the supervisory control provided for the rapid response to a technological failure of the stations.
Key words
sewerage pumping station , power consumption , water disposal system , frequency-regulated electric drive , pump operation regulation
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UDC 628.292.65.011.4
KINEBAS A. K., PANKOVA G. A., LOMBAS S. V., JUDIN M. Iu., Il'in Iu. A., IGNATCHIK V. S., Ignatchik S. Iu.
Methods of Monitoring of Sewerage Pumping Stations (on the example of SPS № 10 of the St. Petersburg’s water disposal system)
Summary
Methods of the monitoring of sewerage pumping stations tested at the SPS № 10 of St. Petersburg are presented. These methods allow to determine (taking into account the changes in the receiving tank – pumps – network system during the operation) technological characteristics of reliability of the pumping station operation necessary for selection of pumps and substantiation of power saving decision at reconstruction.
Key words:
monitoring , designed model , domestic wastewater , sewerage pumping station , technological characteristics of reliability , power saving
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UDC 628.3:62-192
Karmazinov F. V., PANKOVA G. A., Mikhailov D. M., IGNATCHIK V. S., Ignatchik S. Iu., Kuznetsova N. V.
Method of evaluating the amount of emergency wastewater discharges into the environment
Summary
The method of evaluating the amounts of emergency discharges of wastewater into the environment caused by the overrun of wastewater inflow over the capacity of the sewage pumping stations resulted from the emergency shutdown of pumps or inflow of off-nominal wastewater flow is presented. The results of studying failure and restoration flows of the pumping equipment in the combined sewers are presented together with the algorithms of reliability assessment by analytical method and Monte-Carlo simulation method. The use of the developed method of evaluating the amounts of emergency discharges of wastewater into the environment provides for substantiating the solutions at the stage of project documentation development that meet the requirements of the legislative and regulatory documents in the field of water supply, wastewater disposal and environmental protection. The indicators of reliability and environmental safety (probability of flooding of the sewers transporting wastewater to the pumping stations when wastewater is discharged into the environment) variate not only depending on the failure-free performance and maintainability indicators but also depending on the state of the sewage pumping station during the initial period of operation. For this reason one of the ways of improving these indicators at sewage pumping stations is timely execution capital and regular repairs of pumps.
Key words
wastewater , sewerage pumping station , reliability indices , parameters of failure flows , analytical method of reliability assessment , simulation method , density function
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DOI 10.35776/MNP.2020.01.06
UDC 621.65:62-531.3
Usachev A. P.
Method of evaluating the effectiveness of frequency regulation of the performance of sewage pumping units
Summary
The method of evaluating energy savings through the use of frequency regulation of the pumping unit performance at sewage pumping stations is considered. The method is based on a graphical analysis of the parameters of the operation point of the pumps in the working group and is developed for the use in sewer networks that operate according to the level in the receiving tank. The proposed method of evaluating the effectiveness of frequency regulation at sewage pumping stations has been proved by many years of experience of using and is precisely evaluative. Energy savings at sewage pumping stations are significantly lower than at water pumping stations. This applies to the systems with start/stop control because the effect of frequency regulation consists in reducing the velocity of fluid in the pressure pipeline. The bigger the dynamic component of the network characteristic in relation to its static component (in the range of the station capacity change), the stronger effect is manifested. In practice, this is extremely rare. The energy savings in the above examples with the start/stop mode does not exceed 10% (excluding the losses in the frequency converter).
Key words
sewerage pumping station , power saving , frequency regulation , pumping unit , efficiency evaluation
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UDC 628.334.1
Voloshin K. I., Poloskov V. V.
Mechanical Treatment of Wastewater at Sewage Pumping Stations
Summary
The most widespread methods of protection of pumping units against the ingress of large size garbage delivered to sewage pumping station with a wastewater flow are considered. An example of operation of the mechanized rake type screens RKE EKOTON® at the main sewage pumping station of the city of Seversk is made. The screens ensure the reliable removal of large size garbage from wastewater, owing to it the interrepair time of pumping unit operation increases. If before the reconstruction of the technological section 15–20 kg of garbage were removed from wastewater, after the adoption of new equipment this figure increased up to 50 kg/day. To compensate the costs of garbage evacuation the waste collected on screens is transported to the hydro-press for wringing that makes it possible to reduce it volume.
Key words
sewerage pumping station , mechanized rake type screen , filter fabric , discharge capacity
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UDC 621.65.62-531.3:628.1/.2
Sivolov G. E., Karmalov A. I., Ivanson P. B., Iskhakov Yu. B.
Multilevel Automated Control System of Technological Processes of Water Supply and Wastewater Disposal
Summary
The stages of creation of the multilevel automated control system of technological processes of water supply and wastewater disposal with the use of an adjustable electric drive in pumping units, microprocessor and computer hardware are considered. A brief review of principles of operation of the system’s components is done. To ensure the uninterrupted water supply and wastewater disposal JSC Seversky Vodokanal realizes the project of creation of the multilevel automated system of control over technological processes of lifting, treatment and transportation of water to consumers with subsequent wastewater disposal to the city’s treatment facilities. The implementation of the project is carried out step-by-step.
Key words
adjustable electric drive , sewerage pumping station , automated control system , power saving
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UDC 628.292.004.69
Nikitin A. M., Karabanov Yu. Z., Girikov A. O.
Modernization of Sewerage Pumping Stations
Summary
The experience in reconstruction and complex modernization of the sewerage pumping stations with replacement of outdated equipment and pump units, introduction of the automated systems of control of technological processes and application of energy saving technologies is summarized. The successful realization of a great number of innovative technological decisions made it possible to improve the level of organization and control of operation of the whole complex of pumping stations, to ensure the optimal conditions of their operation excluding emergency situations thereby, to reduce operating costs, to increase the service life of pump units and auxiliary equipment, to improve the reliability of their work and ecological safety.
Key words
reconstruction , sewerage pumping station , automated system of control of technological processes , frequency-regulated electric drive , maintenance
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UDC 658.261:621.577
DOI 10.35776/VST.2024.01.06
Razakov M. A.
Regulating the use of secondary energy resources at high-voltage wastewater pumping stations
Summary
The results of studying the use of secondary energy resources at a high-voltage municipal wastewater pumping station are presented. The specific features of designing and operating engineering systems for maintaining a microclimate at a wastewater pumping station, as well as the generated wastes that can potentially be used in the form of secondary energy resources, are considered. A review of the energy resources obtained in the process of pumping wastewater to the treatment facilities and can be used to reduce the share of basic operating costs, was carried out. The results of a field survey of the heating system at a municipal wastewater pumping station are presented. The main types of heating and ventilation systems used at wastewater pumping stations located in Moscow are considered. Options have been proposed for regulating the use of wastewater heat, exhaust air, and the technological process within the premises of a municipal wastewater pumping station, taking into account the features of wastewater treatment at the wastewater treatment facilities. The work can be of interest to the operators of the municipal wastewater disposal systems, engineers of building heating and ventilation systems, as well as for the researchers and designers working in the field of developing microclimate in industrial structures.
Key words
sewerage pumping station , water disposal system , energy , standardization , energy resources , heat energy , electric energy
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UDC 628.218
DOI 10.35776/VST.2023.06.07
Chupin V. R., Skibo Denis
Substantiation of the efficiency of installing emergency storage tanks at wastewater pumping stations
Summary
Improving the reliability of wastewater disposal systems is provided by measures that prevent the intrusion of raw wastewater into the ground and spills onto the land surface. Such measures include backing up pressure and gravity pipeline sections of the network, using their accumulating capacity and installing emergency storage tanks. Based on the life cycle cost assessment, studies of the effectiveness of using emergency storage tanks at wastewater pumping stations were carried out. It is shown that with a certain length of pressure pipelines of two or more strings, the option of installing emergency storage tanks may be most economically viable. As a result, dependences of the efficiency of installing emergency storage tanks on the pressure pipeline length and pumping station capacity were obtained. For wastewater disposal systems in Irkutsk, all wastewater pumping stations are divided into two groups with emergency storage tanks and two pressure pipelines. The results of the study will be useful in updating the scheme for the development of the water supply and wastewater disposal systems of the city.
Key words
sewerage pumping station , pressure pipeline , life cycle cost , emergency storage tank , improving the reliability of wastewater disposal systems
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UDC 628.292.004.69
Butko A. V., Posupon'ko S. V.
Optimization of wastewater pumping station operation
Summary
The operation of wastewater pumping stations requires attention and understanding of the life cycle of the facilities and equipment. As a rule, the facilities put into operation and designed for the calculated amount of wastewater for a long time cannot reach the rated capacity. This is due to more efficient drinking water consumption by the population, low rate of housing development and sale on the territories served by the wastewater pumping stations, reduction and even termination of wastewater discharge by the industrial enterprises. The method of studying the operation of the wastewater pumping stations, selecting the optimal parameters of the home-made pumping units is presented. The implementation of the optimized work schedule for three units with a rated capacity of 1400, 350 and 320 m3/h provided for reducing the number of turns-on of the pumping units and 23% energy saving. At the same time the changes in the work schedule of the downstream transfer wastewater pumping station and 10–12% reduction in the power consumption were registered. The actual cost payback period was less than one year.
Key words
wastewater , sewerage pumping station , power consumption , economic efficiency , method of studying
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UDC 628.31.504.3.054
Kaszuk Brice, Lobanov Fedor
The main trends in the use of deodorization to control malodorous substances
Summary
Elimination of odors caused by malodorous substances at the wastewater treatment facilities is provided with the use of oxygen-containing organic substances by interaction in the air between molecules of sulfur or nitrogen compounds (with sour or fishy smell) and molecules of oxygen-containing substances. Depending upon the composition of malodorous air which contains usually up to 5–8 different compounds (hydrogen sulfide and mercapto compounds; ammonia and various amines) different combinations of aldehydes and ketones are selected. The use of various combinations of odor-blockers provides for the optimal air deodorization results. Deodorant compounds can be used only if the concentration of malodorous substances is lower than maximum permissible limits for atmospheric air. The statistic and dynamic methods of oxygen-containing organic substance molecules distribution in the air are presented. The recommendations on the use of deodorants for odor control at different public utilities (wastewater sludge mechanical dewatering facilities, pumping stations, sewers, settling tanks, ventilating systems) are given.
Key words
sewerage pumping station , reeking substances , sludge , shaft and shaft well , deodorization
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UDC 628.292:628.334
Smirnov Aleksandr Vladimirovich, Khristenko Artur, Makhlai Konstantin
Specific features of retrofitting mechanical wastewater treatment
at sewage pumping stations
Summary
The process solutions applied at most of the sewage pumping stations built in the second half of the last century became obsolete, and the equipment installed in screen chambers was not designed to handle the current volumes and composition of wastes. Today, fibrous inclusions present in wastewater in large amounts pose certain difficulties in the operation of equipment. While upgrading the facilities, it is important to take into account the requirements of reliable and economical operation of the equipment in screen chambers, and significant differences in the conditions of its operation compared to the operation of similar equipment at the wastewater treatment facilities. The examples of the process solutions implemented by MY PROJECT JSC on the basis of the equipment designed by Ecopolymer TPE are presented. Comprehensive solutions have been proposed for pumping stations with the inlet manifold of various depth, including screens, as well as the equipment for grinding, transporting, dewatering and removing the screenings. The implementation of process solutions provides for maintenance personnel downsizing and reducing operating costs in general.
Key words
sewerage pumping station , computerization , mechanical treatment facilities , vertical coarse screens , removal of fibrous screenings
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UDC 628.211:53.072.12
Karmazinov F. V., Zhitenev A. I., Shunto I. P., Kuz’min Valentin, Kostenko I. G., Martiugin V. A., Pulin O. V., IGNATCHIK V. S., Ignatchik S. Iu., Kuznetsova N. V., Fes’kova A. Ia.
Specific features of hydraulic mode simulation for combined sewers
Summary
Hydraulic simulation of sewerage networks in big cities in practice involves input of large quantities of data on all the network sections including the yard ones. This complicates significantly and extends the time required for fulfilling the task. Therefore developing express-method of hydraulic simulation of transporting facilities of sewers will provide for reducing the amount of input information without reducing the accuracy of the calculation results. In order to substantiate the method experimental studies in one of the sanitation districts of Saint-Petersburg were carried out. By experiment it was stated that the use of simplified hydraulic simulation with account of only street networks (without the yard ones) resulted in 20% overestimation of the calculated flows. Herewith the express-method of calculating wastewater flows in combined sewers depending on the rainfall intensity that allows the use of hydraulic simulation with account of only street networks where virtual tanks are simulated with a capacity equal to the capacity of the yard networks connected to them has been experimentally substantiated. The method error is 2–5%.
Key words
sewerage pumping station , capacity , combined sewer , flow regulating unit , stochastic method , unsteady random flow
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DOI 10.35776/VST.2022.07.06
UDC 628.25
Skibo Denis, Chupin V. R., Ogniov Igor
Improving the environmental safety of wastewater disposal system on the basis of emergency storage tanks
Summary
A new structure is proposed – an emergency storage tank for wastewater pumping stations that provides for improving the environmental safety and controllability of the wastewater disposal system by regulating wastewater in underground storage facilities. Owing to the specific features the tank usable volume is filled with wastewater from gravity sewers; the wastewater is retained in it for a certain time and removed together with the sludge eliminating any additional pumping equipment. The range of application of the emergency storage tank extends to the systems for the disposal of domestic, storm and industrial wastewater. This innovative device should become an essential component of the municipal engineering infrastructure and meet environmental requirements for wastewater disposal. Structural solutions adopted in the development of a horizontal storage tank as the main multifunctional accumulating element are focused on the possibility of installing this structure in the built-up areas of the city, as well as in adverse hydrological conditions. To determine the usable volume of horizontal storage tanks the standard mathematical modeling approaches were used with the help of the approximation method. A method is proposed for calculating the storage capacity of the tank, as well as calculating the volume of the ballast chamber of a horizontal storage tank. The aspects of the resistance to floating up of underground elements are considered. The modular principle of the tanks design provides for installing it both by trenchless and cut-and-cover methods; whereas the available additional ballast opens the door for operating in difficult hydrological conditions. It is recommended to equip the existing and projected wastewater pumping stations with the developed emergency storage tank.
Key words
wastewater , sludge , reliability , sewerage pumping station , emergency storage tank , controllability of the wastewater disposal system , wastewater flow control
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DOI 10.35776/MNP.2020.01.05
UDC 628.292:62-531.3:65.011.4
Yermolin Yu. A.
Potentialities of energy saving in the operation of a sanitation system of a big city
Summary
The article, without mathematical formalization, with due consideration of physical interpretations of the process of wastewater disposal in a large city, reveals the potential for energy savings in the process of wastewater transportation in an extensive gravity network, enclosed in its very structure. This potential can be fulfilled through targeted operational redistribution of wastewater flows over sewage pumping stations and transportation mains of the network, achieving the minimum of total energy consumption by all pumping stations. It is shown that the calculation of such a redistribution is possible only on the basis of a mathematical model of the project by formulating and solving the corresponding optimization problem. The requirements that the mathematical model of the project shall meet are discussed; and its capabilities are shown while operating the network not only in normal operating conditions but also in emergency situations. The consideration of the problem is based on the positive results of a large-scale industrial experiment conducted earlier on the optimal management of a section of the Moscow sanitation system.
Key words
sewerage pumping station , water disposal system , specific features of the sewer network structure , electrical energy consumption , redistribution of wastewater flows , mathematical model of the project , optimization task
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UDC 628.218
Karmazinov F. V., Zhitenev A. I., Shunto I. P., Kuz’min Valentin, Spivakov M. A., Pulin O. V., IGNATCHIK V. S., Ignatchik S. Iu., Kuznetsova N. V.
The use of stochastic methods in determining the required capacity of regulating units in combined sewers
Summary
The flows of wastewater removed by the combined sewers are characterized by high irregularity caused by the random nature of rainfall and snow melting. One of the ways of improving the reliability of these systems is the introduction of flow regulating units. They have been designed to diverse wastewater between the sanitation districts in case of emergency or in case of the actual wastewater inflow in one of them, e. g. because of over-estimated rainfall, exceeding the actual capacity of the regulating units. The method of determining the required capacity of the flow regulating units with the use of stochastic methods was developed. By the example of the wastewater disposal system of Saint-Petersburg it was stated that the required supply of the sewage pumping station (SPS No. 6) functioning as a regulating unit between the left-bank and right-bank sanitation districts was of random nature and was distributed according to the exponential law with the increasing probability of using the modes with lower supply.
Key words
sewerage pumping station , capacity , combined sewer , flow regulating unit , stochastic method , unsteady random flow
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