Tag:energy efficiency

№10|2015

AUTOMATED AND INFORMATION MANAGEMENT SYSTEMS

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UDC 628.2/.3:658.52.011.56

Regotun A. A., Daineko O. N., Smirnov Aleksandr Vladimirovich

Automated control of the treatment facilities on the basis of mathematical models

Summary

The applicability of the mathematical models in the control of wastewater treatment facilities in terms of the operational issues solutions is considered. A possible option of using the software package on the basis of ASM mathematical models in the control of the biological treatment plant with retrofitting into the control system of the entire wastewater treatment facilities is presented. The gene­ral principles of control system building with the integrated mathematical model of the biological treatment process are described. The comparative analysis of the popular advanced software simulation packages and the simulation software developed by My Project Company is sited. By the example of the standard aeration tank configuration the possible and easy integration of the software into practically any advanced SCADA-system is demonstrated. The contrary case is described: the use of the software in the highest level of the automated process control system of the wastewater biological treatment.

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№3|2012

ADVANCED TECHNOLOGIES AND EQUIPMENT

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UDC 628.146

Zaytseva S. G.

The use of advanced pipe accessories as a method of reducing water losses and improving energy efficiency

Summary

The reduction of physical water losses alongside with the improvement of water distribution energy efficiency is an important challenge both in Russia and all over the world. Described in the paper is the method of water losses reduction developed by the International Water Association (IWA) on the basis of four directions of activities, i. e. pressure control in the distribution network; leak detection and elimination; routine maintenance, repair and rehabilitation of the fittings and pipes; prompt elimination of distribution network failures. Comprehensive activities in the abovementioned fields allow reducing water losses to an economically acceptable level. Simple and efficient measures are replacement of valves and fittings as well as introduction of advanced safety valves, repair accessories and pressure control valves in the distribution network.

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№6|2018

DESIGNING WATER SUPPY SYSTEMS

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UDC 696.11

Butko D. A., Danekiants A. G., Mel’nikov I. S.

Choosing the optimal water supply schematic for a high-rise building

Summary

The task of enhanced studying scientific substantiation of the selection of a water supply system schematic with the development of criterial indicators (parameters) of optimization is formulated. The analysis of the state of real estate construction market provided for making a substantiated choice of a model building for which seven different versions of water supply schematic were designed and hydraulic and technical and economic calculations were made. The core indicators of reliability were calculated with the use of three methods. The significance coefficients are proposed that determine the degree of impact of a single assembly failure on the general system robustness. The regularities of the fitting failure-free operation probability changing with increasing the number of storeys in a building were determined. An algorithm of choosing an applicable water supply schematic was drawn up that was based on the question-answer method and took into account the basic data on the number of storeys, pressure limitations, building design features, redundancy possibility and (or) necessity as well as additional equipment installation. The optimization parameters were determined: material characteristics, reliability and energy consumption. To solve the formulated task a uniform integral equation of reliability-economic index is proposed. The coefficients and all relevant numerical values assumed depending on the schematic under considera­tion are cited. Inserting basic data into the equation provides for the coordinates for definition domain development. Each schematic in view of its specificity has a definite range of values (definition domain).

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№8|2011

ENERGY AND RESOURCES SAVING

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UDC 697.3:621.577

Porompka S., Makhov L. M.

Rain Water as a Factor of Enhancement of Power Efficiency of Heat Pumps

Summary

A scheme of the use of a heat pump with an underground collector damped with rainfall with the help of a special system is developed. The enhancement of power efficiency and a coefficient of weekly output of heat pumps due to purposeful flushing of underground collectors without additional auxiliary power is proved. When using the flat collector with a flushing system the expenditures for operation and maintenance of a heat pump of water-brine type go down from 735 to 688 Euro per year. Capacity of heat extraction is increased with the help of wetting of squashy ground from 10 to 30 Wt/m2 aproximately.

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№6|2010

PROBLEMS, PERSPECTIVES

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UDC 628.32:65.012.45

KASATKIN F. Yu., KOSTYLEV S. V.

Common Information Space of an Enterprise

Summary

The information infrastructure of the State Unitary Enterprise Vodokanal Sankt-Peterburga helping to ensure reliability, uninterrupted operation, high output, safety, and confidentiality is described.

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№8|2016

BEST AVAILABLE TECHNOLOGIES

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UDC 628.35:004.69

Egorova Yu. A., Levin D. I., Liushina L. F., Petropavlovskii S. A., Bazhenov V. I., DANILOVICH D. A., Noskova I. A.

Integrated upgrade of the Samara municipal wastewater treatment facilities

Summary

The experience of «Samarskie Kommunal’nye Sistemy» LLC in designing, constructing and upgrading the municipal wastewater treatment facilities with a capacity of 450–750 thousand m3/day is presented. Considering the adverse ecological state of the midstream and downstream of the Volga River the task of improving the efficiency of wastewater treatment is of top priority that has been approved by the Program adopted by the Department of Energy and Public Utilities of the Samara Area for 2013–2019. The results of retrofitting wastewater biological treatment technology on the basis of UCT Process with unique zone and recycling layout barrangement by modifying the existing capacities of four-corridor aeration tanks are presented. The justified technical solutions of the key facilities that determine the energy and structural efficiency of the project of upgrading the air blower house with the use of mechanically regulated air blowers (the capacity range of each 59.4–132.1 thousand Nm3/h) and constructing two sludge pumping stations with 15000–27360 m3/h regulated wastewater flow are set. The process automated control system has been introduced. The tied to time design works required fast and efficiency calculation methods with the use of process simulation modeling in GPS-X environment (ASM2d model), computerized fluid dynamics – in ANSYS Fluent environment. The prediction of the dynamics of the treatment efficiency changing within 24 hours while ensuring average daily concentrations in mg/l – suspended solids – 15.5; BOD5 – 5.7; COD – 34.9;
N–NH4 – 0.25; N–NO2, N–NO3 – 7.02; P–PO4 – 0.68 is given. Relatively high washout of suspended solids is caused by the significant design value of sludge index 150 сm3/g. In the implementation phase of the environmentally efficient measures the construction of tertiary treatment facilities valued at 400 million rubles (about 30% of the total cost of the upgrade of the entire facilities) was rendered economically unviable. Before commissioning the actual energy saving of 13 mln kW·h/year including 8.8 mln kW·h/year owing to the replaced air blowers, 4.2 mln kW·h/year owing to the sludge pumping stations with submerged pumps that replaced airlift was achieved. The performance targets of the projects and the technical solutions applied measure up to the best available technologies.

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№8|2016

POWER RESOURCES CONSERVATION

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UDC 628.12/.14+628.17

Rakitskii D. S., Egorova Yu. A., Nagornyi S. L., Tabunkov A. S., Polst'ianov V. N., Vorob'ev A. G., Chernosvitov M. D., Shmigol V. V.

Integrated approach to the upgrade  of booster pumping stations in Samara

Summary

The applicability of improving the reliability and energy efficiency of the water supply system of Samara is specified. The main me­thods and means of step-by-step implementation of the plan of upgrading booster pumping stations are described. The description of software and hardware system chosen for the implementation of the set task is presented. The data on the reduction of the total power consumption by 37 pumping stations is given. Frequency regulation of the pumping units operation provided for 40% reduction of the power consumption; the introduction of the adaptive regulating algorithm for the stations with parallel operation of several pumping units provided for 27% reduction of power consumption. The estimated reduction of power consumption with replacing pumping units after the introduction of the adaptive regulating algorithms was 18%. 8% reduction of the failure rate in the distribution network owing to the average pressure reduction in the distribution network and due to the improvement of the operational control efficiency by obtaining complete exact information on the process parameters in real-time mode was noted. The system introduction predetermined operating personnel downsizing and simplifying the organizational-technical measures for the maintenance of the pumping stations. The criteria expedient to be used in estimating the operation efficiency of the stations are indicated. The diagrams of the operation parameters of a number of upgraded pumping stations are presented. The recommendations on the further upgrade of the booster pumping stations on the Samara territory are quoted.

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№12|2014

POWER RESOURCES CONSERVATION

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UDC 628.147.2

Karmazinov F. V., Melnik E. A., Ipatko M. N., Il'in Iu. A., IGNATCHIK V. S., Ignatchik S. Iu.

The method of evaluating the economic efficiency of water supply systems with pumping stations equipped with tanks

Summary

A method of evaluating the economic efficiency of the water supply systems with pumping stations equipped with tanks is presented that provides for optimizing at the design stage water conveying systems in remote areas. These systems are characterized by: low energy efficiency because of the pressure loss during water discharge and low network reliability during bypass operation caused by pressure fluctuation. The method takes into account the specific features of simultaneous operation of two subsystems: pipeline and valving subsystem and booster pumping subsystem. The selection of net discounted flow rate over the life cycle as a uniform optimization criterion for all the subsystems is substantiated. It is stated that the economic and energy efficiency of the investment projects of upgrading water conveying systems is a function of the actual inlet pressure in the supply pipelines and depends on the engineering measures aimed to improve it. These measures include the use of valves for downstream pressure control, mini-hydropower units and auxiliary low head pumping stations. By the example of Parnas booster pumping station in St. Petersburg it is shown that the use of the developed method allows improving the reliability coefficients of the water supply system to P(t) > 0.95 with simultaneous 17% reduction of the net discounted flow rate over the life cycle. In this case depending on the actual inlet water pressure in the supply pipeline the energy consumption of a pumping station is reduced by 22–60%.

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№9|2016

POWER RESOURCES CONSERVATION

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UDC 628.355

Gogina Е. S., Gul’shin I. A.

Simulation of energy efficient biological wastewater treatment process in a circulation oxidation ditch

Summary

In the National Research Moscow State University of Civil Engineering comprehensive work is carried out in the field of simulating energy efficient wastewater treatment processes in circulation oxidation ditches. Notably, process flow schemes of removing nitrogen compounds from wastewater at low dissolved oxygen concentrations are considered. The study is aiming at the determination of optimal process modes of biomass activity under different conditions in the course of implementing experimental schemes. The summarized results of the second stage of the comprehensive study of energy efficient wastewater treatment in circulation oxidation ditches are presented: the efficiency dependency of simultaneous nitrification and denitrification at variable oxygen regimen has been determined, the mechanism of biomass adaptation and specific features of biomass bringing to the operating regime has been studied. The experimental plant model is described that provides for considering not only biochemical but also more detailed hydraulic specific features of the experimental process.

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№9|2017

WASTEWATER TREATMENT

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UDC 628.35:66.081.63

Kalachev D. A.

New age of membrane technologies: HUBER VRM unit

Summary

The information on the developments of HUBER Company in the field of wastewater and sludge treatment with the use of advanced technologies is presented. The company experts have been developing various system options: from mechanical treatment to hi-tech membrane biological reactors. The use of membrane bioreactor provides for reducing the volume of aeration tanks, since it ensures operating biological treatment stage with activated sludge concentration up to 8 g/l (or to 12 g/l in the MBR filtration chamber); abandoning secondary settling tanks, tertiary treatment and disinfection stages (if needed) resulting in the reclamation of additional space. Beside strict requirements to the efficiency of treatment it is important to note the reduction of operation expenditures, for energy in particular. HUBER Company has developed a reliable and energy efficient solution – HUBER VRM membrane unit. The basic innovative solution in the designed membrane filtration unit is a unique AirBoost system.

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№4|2014

ЭНЕРГОРЕСУРСОСБЕРЕЖЕНИЕ

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УДК 621.65:62-531.3:628.1/.2

Bagaev Yu. G., Karpov N. V., Usachev A. P.

Specific features of frequency regulation of parallel pumps

Summary

One of the options of energy efficient operation of pumping units at the water and sewage pumping stations under pump impeller speed variation with the help of variable-speed electric drives widely used at present time is considered. One variable-speed electric drive is installed either for a group of operating units or on a single pump. Installing a variable-speed electric drive on each operating unit at first sight seems to be a very expensive measure; therefore more often one electric drive is installed for a group of pumps (2–3 units). However, in this case cavitation processes can arise, the dynamic loa­ding on the pump shaft and bearings can increase, the lifting efficiency can decrease, and in the long run the pump energy efficiency can drop. The data of the theoretic and practical substantiation show that installing variable-speed electric drives on each operating pumping unit provides for weakening of the above-mentioned shortcomings, whereas the energy efficiency improves.

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№8|2014

POWER RESOURCES CONSERVATION

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UDC 628.171.033

Shmigol V. V., Chernosvitov M. D., Kukolkin V. N., Polst'ianov V. N.

The prospects of improving the energy efficiency of boosting pumping stations

Summary

«Samarskie kommunal’nye sistemy» LLC has been providing cold water supply, wastewater collection and treatment on the territory of the Samara urban district. One of the main tasks of the enterprise is improving the energy efficiency of boosting pumping stations. For this purpose a comprehensive approach to the selection of the number and trademark of pumping units as well as to the practicability of installing variable-speed drives is required. In contrast to the projected pumping stations with calculating the duty cycle of the pumps, with the existing stations solving the problem of minimi­zing wasteful energy losses requires studying the established water consumption pattern; determining the required pressure at the pumping station outlet and available pressure in the municipal distribution network. The problem of maintaining optimal pressure at the boosting pumping station outlet shall be considered: constant maximum design pressure; changed as per schedule; depending on the flow rate. Arranging a complete water audit, identifying illegal water consumers and optimizing the operation of block pumping stations with the use of variable-speed drives will provide for the significant reduction of water and energy consumption. The comparison of the dynamics and specific water consumption in separate residential buildings with the operation of the block boosting stations supplying water to separate residential buildings and blocks and with the existing regulation is presented. The diagrams of the specific water consumption patterns and variations in water consumption within 24 hours are given. The conclusions related to the prospects of improving the energy efficiency of the boosting pumping stations operated by «Samarskie kommunal’nye sistemy» LLC are drawn.

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№9|2012

POWER RESOURCES CONSERVATION

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UDC 628.3:658.26.004.18

Kofman V. Ya.

Improving the operating efficiency of the wastewater treatment facilities overseas (review)

Summary

The review of power efficient technologies of wastewater treatment used at the wastewater treatment facilities overseas is presented.

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№12|2010

ECONOMY OF RESOURCES

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UDC 628.17.001.4

Naumov A. L., Sud’ina O. S.

Improvement of Energy Efficiency of Pipeline Systems of a Building

Summary

Problems of the power saving in construction can be solved by means of reducing heat losses through the enclosing structures, installing heat and water meters, using nontraditional sources of heat supply et al. Issues of energy saving in pipeline engineering systems in the course of designing are not studied enough while a considerable part of power consumption by the systems of engineering support of buildings (up to 80%) falls on the drives of pumps and ventilators of pipeline networks: heating, water supply, ventilation, and air conditioning. Economic indexes are considered as criteria of energy efficiency of pipeline networks. The method of reduced expenditures is used for calculations.

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№2|2011

ENERGY AND RESOURCES SAVING

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UDC 628.1.2:658.26.004.18

Usachev A. P., Karpov N. V.

Enhancement of Energy Efficiency of Pumping Plants at Water Supply and Wastewater Disposal Systems

Summary

One of the ways of enhancement of energy efficiency of pumping plants at water supply and wastewater disposal systems introduced successfully at the Municipal Unitary Enterprise Gorvodokanalof Novosibirsk is considered. The matter is the introduction of high-voltage stations of frequency control of pump units with power voltage of 6–10 kV. Variants of frequency regulation and experience in their introduction at pumping stations are presented. The experience in operation of the stations of frequency control demonstrates their high efficiency not only in power saving but also concerning the rest operational indices including provision of the stable and guaranteed water supply to all consumers in particular.

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№8|2012

THE CENTENARY OF TCHELYABINSK MUE «WATER SUPPLY AND WASTEWATER MANAGEMENT PRODUCTION ASSOCIATION»

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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.

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№10|2012

WASTEWATER SLUDGE TREATMENT

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UDC 628.336.71

Khramenkov S. V., Pakhomov A. N., Streltsov S. A., Kevbrina M. V., Vanyushina A. Ya., Agaryov A. M.

Improving the efficiency of wastewater sludge pretreatment by high temperature hydrolysis before digestion

Summary

The results of investigating activated sludge and primary sludge thermal pretreatment with the purpose of improving the efficiency of anaerobic digestion are presented. The highest efficiency of activated sludge organics transfer into readily soluble form is ensured after thermal hydrolysis at 160°C. The solubility of primary sludge organic matter increases evenly with the temperature increase in the range of 100–200 °С. The maximum biogas output in the ultimate digestion test is increasing after activated sludge hydrolysis at 160°С, primary sludge hydrolysis – at 180–200°С. Digestion in a continuous mode after activated sludge pretreatment at 140–160 °С results in 53% gas generation increase. Any further hydrolysis temperature increase produces a negative impact on gas generation and disintegration of activated sludge ashless matter. Thermal hydrolysis of primary sludge in thermophilic mode is not efficient. Pretreated sludge dewatering performance is improved; consequently the flocculant dosage can be reduced by 0.8–1.0 kg/t DS.

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№4|2019

POWER RESOURCES CONSERVATION

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UDC 628.14:62-531.3

Spirin E. V., Radetsky M. Yu., Lobyntsev S. V., Andriyanets P. I.

Improving the operation of the Novosibirsk water supply system

Summary

In Novosibirsk over the past 20 years a set of measures has been implemented using equipment and technologies that have significantly improved the reliability and efficiency of the water supply system. Networks and facilities of the water supply system designed and built in the 1960–1980-ies have a large reserve for upgrade that will allow significantly improving their efficiency, reducing operating costs and improving the quality of water supply. As a result of the measures taken the company not only provides for the high-level water supply in the context of limited financial resources but also ensures the development of the city.

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№2|2017

WASTEWATER TREATMENT

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UDC 628.3

Kalmykov A. A.

The use of energy efficient technologies of wastewater treatment: ways of solution and implementation problems
(to be discussed)

Summary

Currently in different Russian cities in the process of operation and maintenance of wastewater treatment facilities designed and constructed in 1970-ies the problems often arise that are typical for many water and wastewater utilities in Russia. Ways of solving these problems in the process of upgrade are also typical and represent a package of measures that should be implemented on a branch basis. The potential of the advanced equipment and technologies that provide for improving the efficiency of the treatment facilities operation at significant energy saving as well as for solving the problems of upgrading treatment facilities under the conditions of tariff regulation and lack of competent professionals is presented.

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№9|2018

POWER RESOURCES CONSERVATION

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UDC 628.356.1:621.61

Bitiev A. V., Basov N. S., Novikov S. N., Smolenskii A. V., Ustiuzhanin A. V., Bazhenov V. I.

Predicting energy-efficient effect of the controlled air delivery
at the Novo-Liuberetskie Wastewater Treatment Facilities

Summary

Стратегия развития АО «Мосводоканал» предусматривает
The corporate strategy of «Mosvodokanal» JSC envisages the systematic practical application of energy-efficient solutions substan­tiated by the method of mathematical prediction of the energy-efficient effect of the controlled air delivery at the air blower house of Block No. 1 of the Novo-Liuberetskie Wastewater Treatment Facilities in Moscow. The controlled air delivery to the aeration tanks for the biological wastewater treatment processes has been proposed as a key and cost effective method of energy conservation. The energy-efficient effect was determined by comparing the resultant energy consumption of two states of the predictable air deliver system – the basic state without control and controlled one. In the process of data and measurement method generation the calibrated metering devices of the operating SCADA system and data of the certified laboratory were used. The experimental survey of the air blower house with N750-23-6 units was carried out. The average decrease of air delivery resulting from the equipment deterioration for the 35 years’ operating period was 5.8–10.4%; the operation pressure decrease was 40.7–5.4%. The isoentropic coefficient of performance of N750-23-6 units was 75% at 79% rating. The method of predicting the energy-efficient effect including the mathematical model of energy input is considered. The model provided for 1.27% average ratio error at the verification against the actual environment of the operating object. The mathematical prediction of the energy-efficient effect revealed 32.5% or 11,343.97 thousand kWh/year reserve or 30,061.52 thousand ruble/year (VAT excluded) savings. Adjustable blade control of the air blowers was chosen as the technical basis of the energy efficiency. The study results formed the basis for the energy service contract.

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