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UDC 628.5.504.06
Zacharias Berndt
Hamburg – St. Petersburg: cooperation in water sector
Summary
The information on the cooperation between municipal water utilities – Hamburg Wasser and State Unitary Enterprise «Vodokanal of St. Petersburg» is presented. St. Petersburg is an economic, research and cultural centre, major transport hub and big sea port of the North-Western region of Russia. The city produces a substantial impact on the environment and water quality of the Baltic Sea. Hamburg is the second big German city and one of the biggest European ports. Hamburg and St. Petersburg since long have been bound by trading relations that provided for establishing the first German-Russian commonwealth of twinned cities. At present this background forms the framework for the cooperation of Hamburg Wasser and Vodokanal of St. Petersburg, the companies that provide for drinking water supply, wastewater disposal and wastewater sludge utilization. In this respect mutual exchange of experience in the field of operation upgrade and optimization, improvement of operation and power efficiency of the public water supply and wastewater networks and facilities as well as in the field of improving the existing regulatory framework is of high value. The requirements to the protection of the water bodies are extremely high for both companies, therefore both in Hamburg and St. Petersburg large-scale wastewater collection systems are under construction. All the Hamburg Wasser water and wastewater treatment facilities are fully independent of external power supply. At present in Vodokanal of St. Petersburg energy optimization of the pumping stations and upgrade of the wastewater treatment facilities operation are carried out.
Key words
losses of water , water supply , power saving , water disposal , specific water consumption
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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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DOI 10.35776/VST.2021.05.05
UDC 622.794.25
Kotrelev V. M., Polosina Tat’iana, Novikov Gleb, Papush Pavel
Alfa Laval’s latest developments in sludge dewatering with decanter centrifuges
Summary
The innovative technologic solutions developed by Alfa Laval Company and implemented in Aldec G3 decanter centrifuge are considered. Alfa Laval Company produces two types of advanced decanter centrifuges for wastewater sludge dewatering (altogether there are more than 12 types of centrifuges for use in various fields: from the food industry and biopharmaceuticals to dewatering oil sludge or tailings of the mining industry). The use of Aldec G3 decanter centrifuge provides for the maximum reduction in the total cost of wastewater sludge dewatering. Described are the types of repair work for decanter centrifuges carried out in Alfa Laval, the only ISO-certified service center in Russia.
Key words
power saving , wastewater treatment , decanter , sludge dewatering , decanter centrifuge , equipment upgrade
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UDC 628.112.2
ALEKSEEV V. S.
Specific features of underground water use for water supply in Russia
Summary
The aspects of using underground water for water supply in Russia are considered. Changes in the system of underground water abstraction, the lack of uniform technical policy in the field of underground water protection from depletion, drilling of water wells without adequate control from hydrogeological and administrative services caused deterioration of drinking water quality and in general can culminate in underground water resources depletion. The consequences of these activities have already partially manifested. The problems of technical completion of water wells are touched upon, the causes of well abandonment are specified. The aspects of energy saving in water well operation are considered.
Key words
water supply , ground water , power saving , water abstraction facilities , specific well yield
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UDC 628.3:62-531.3.003.13
Shadrin V. A.
Improving the energy efficiency
Summary
Retrofitting frequency converters at the water and sewage pumping stations of Tchelyabinsk MUE «Water Supply and Wastewater Management Production Association» as part of the «Program of energy conservation and efficiency improvement in MUE «Water Supply and Wastewater Management Production Association» for 2010–2014» is reported.
Key words
power saving , frequency converter , energy efficiency , pumping station
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UDC 628.112.24:621.671
Shchavelev A. S., Zakharov V. A., Nikitin V. I.
Deep-well pumping units at the Velizhany water treatment facilities of Tumen
Summary
Centrifugal submersible pumps are designed for installation in deep wells, open pits and different reservoirs. The pumps ensure high pressure of the pumped clean water with a small sand concentration. Deep-well pumps are widely used both for domestic and industrial purposes (e. g. for automatic water supply, garden irrigation, in firefighting systems etc.). Deep-well pumping units have been used at the Tumen Vodokanal facilities from the beginning of 1980-ies in response to the need of deep underground water abstraction. The story of establishing the production of APVM and ETSV deep-well pumping units at the premises of the mechanical repair department of «Tumen Vodokanal» LLC is described. The problems related to their production and operation are designated. The succeeding introduction of advanced energy efficient equipment manufactured by Wilo German company and SAER Italian company is considered, the results of their operation are presented. Replacing ETSV pumping units with Wilo and SAER energy efficient pumps provided for reducing the energy intensity at the water intake facilities of the Velizhany water treatment plant by 23.8%. The results of pilot operation of Ciris CRS10-65/3 deep-well pumping unit manufactured by Livnynasos OJSC at one of the Tumen water intakes are summarized. The operation of deep-well pumping units made of high quality anticorrosive materials allowed three-fold reduction of repairs and hence significantly decrease of the operation and maintenance expenditures at the intake pumping station of the Velizhany water treatment facilities.
Key words
power saving , well pump , impeller , domestic water supply , electric motor
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UDC 628.1.2:658.26.004.18
Usachev A. P.
Control of centrifugal pump parallel operation
Summary
The problems related to the cable capacity of pumping units during their parallel operation (one with variable-frequency control, another one – without variable-frequency control) are considered. In the traditional control schemes (without variable-frequency control) the problem is solved by throttling of each pump with cable capacity levelling of their drive motors. This function is usually carried out by the operator in manual mode. Based on the conducted analysis an algorithm of pump control was developed that provided for their safe operation in the working area and maximum energy efficiency. It is proposed to carry out controlled throttling of the pump without variable-frequency control by controlling the position of the set point of the pump with variable-frequency control at the working area interface. To ensure failure-free operation of the pumping station in case of the pump with variable-frequency control emergency shutdown it is recommended to change the system of the pump without variable-frequency control for automated pressure maintaining with the help of throttling. To implement the given algorithm the use of a special process controller with the sufficient computing power (STK 500 type) and series SP 200 blocks is proposed.
Key words
power saving , frequency regulation , centrifugal pump , parallel operation , throttling
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UDC 628.336.515:621.311
Khrenov K. E., Khramenkov S. V., Pakhomov A. N., Streltsov S. A., Khamidov M. G., Belov N. A.
Utilization of Biogas and Creation of Autonomous Sources of Power Supply at Treatment Facilities
Summary
The process of methane fermentation of sludge generated in the course of wastewater treatment is used at sewerage treatment facilities of the MSUE Mosvodokanal. The complex reconstruction of heated digestion tanks is carried out since1998; as a result of it the output of biogas has been increased by 1,7 times – up to 250 000 m3/day. To rise the efficiency of using the biogas and reliability of power supply it was decided to construct two mini-heat electric power stations of 10 MWt capacity each. An investor, the Austrian concern EVN, has been selected on the competition base. The mini-heat electric power station at the Kuryanovo treatment facilities was put into operation in January 2009. This mini-HEPS ensures 50% of need in electric energy and 30% in heat energy. This project became one of the largest in the field of alternative power engineering and the first power station in Russia operating on biogas.
Key words
power saving , sewerage treatment facilities , methane fermentation of sludge , biogas , autonomous source of power supply
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UDC 628.292.65.011.4
Ignatchik S. Iu.
Energy conservation and reliability assurance in upgrading sewage pumping stations
Summary
The main principles of reliability and energy conservation calculation method for designing the upgrade of local sewage pumping stations that are transferring wastewater to the treatment facilities are presented. When preparing a feasibility study of the project design the technology and probability indices of reliability for each element of the process part of the pumping station together with probabilistic and individual dimension reliability are determined. The option of upgrading the process part is selected with account of the environmental requirements and investment efficiency of the project.
Key words
wastewater , power saving , operation expenditures , pumping station , calculated hydraulic model , net discounted expense , reliability indices
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UDC 621.644
Orlov V. А., Zotkin S. P.
Energy conservation in applying protection coatings by trenchless technologies
Summary
The analysis of trenchless technologies and different types of inner protection pipe coatings for ensuring the energy conservation effect during water transportation is presented. Circular pipes and pipes with deformed shape profile, fusion-bonded linings based on inorganic and organic materials are considered as protective coatings. Possible achievement of energy conservation in applying protective coatings by trenchless technologies of renovating water pressure pipelines on the basis of running meter of the pipeline length per year was studied. On the basis of the designed computer-aided program a comprehensive evaluation of energy efficient Swagelining technology that involved pulling new preliminary thermomechanically contracted polymer pipes through the old pipeline was carried out. The computer-aided program for calculating the operation parameters of a pressure pipeline subject to rehabilitation with preliminary contracted polymer pipes allows the designers of making efficient and prompt decisions by event simulation and the use of a wide range of polymer pipes of the relative diameter and SDR value (ratio of the diameter to the pipe wall thickness).
Key words
power saving , pipeline , trenchless technology , renovation , protective coating , hydraulic characteristic
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UDC 628.112.24:69.003.13
Fisenko V. N.
Energy saving in operating deep wells for underground water abstraction
Summary
The share of energy costs in the operating expenditures structure reaches 85%. Taking into consideration the requirements to the reduction of СО2 emissions into the atmosphere as well as the necessity of reducing the costs and water tariffs, energy saving is the priority task for the housing and utility enterprises, industrial, agricultural companies and water and wastewater services providers that are operating deep wells. Different options of installing water lifting equipment in deep wells are considered. The energy efficiency comparison was made on the basis of the software designed by Wilo Company (Germany), pump manufacturer. The specific features of hydraulic calculations of the combined operation of the pump and the well are considered. The data on the structural concepts for deep wells that provide for saving energy spent directly on underground water lifting is set. The economic and financial mechanism of inducing the measures to reduce the energy consumption by water and wastewater services providers on the basis of the conditions of their foreign investment self-sufficiency development is illustrated.
Key words
water intake , ground water , power saving , hydraulic design , submersible pump , well , lift pipes
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