- Количество слайдов: 15
European Economic Congress Katowice, 14 -16 May Water supply system and water management Implementation of advanced technical solutions of St. Petersburg Vodokanal in the city Vladimir Gvozdev Deputy Head of Water Supply Department, Engineering and Innovation Center SUE “Vodokanal of St. Petersburg”
Safe water supply as a factor of favorable living environment ü safe portable water in terms of epidemiology and radiology; ü minimal environmental impact thanks to the use of environmentally safe chemicals and technologies; ü responsibility before customers at present and in future through solicitous attitude to the natural resources; ü energy-efficient processes; ü well-qualified personnel guarantying accident-free, effective operation; ü interaction with customers and awareness-raising work.
St. Petersburg Water Supply System Water Supply Zones of Main Water Treatment Plants Service area – 1, 453. 1 km 2 Served population – 4. 8 mio people. Zelenogorsk WTP Specific water consumption 2011– 168 l/day*person Description of the water supply system as of 01. 2012 Kronshtadt WTP Lomonosov WTP Main WTP Northern WTP Volkovskaya WTP Southern WTP Northern water supply zone (589. 0 km 2) Southern water supply zone (727. 6 km 2) Kolpino WTP Central water supply zone (136. 5 km 2) Dudergofskaya WTP – water treatment plant Ø water supply sources: • the Neva River– 98% • underground water and mixed source – 2% Ø number of water treatment plants – 9 Ø number of boosting pumping stations – 200 Ø length of water networks– 6 665 km Ø daily average water supply from WTPs – 1, 922. 900 m 3/day.
Water Consumption by the population of St. Petersburg l/person Specific water consumption in St. Petersburg, l/person*day
Provision of guaranteed safe portable water to the population of St. Petersburg g meetin mples sa water lets ge of t centa TP ou he per dards at W se in t e stan Increa th - Replacement of chlorine with sodium hypochlorite at 75% of the facilities 2003 2005 - Implementation of the UV disinfection at 72% of the facilities - Implementation of a system to ensure water supply security after detection of toxic substances - Optimization of the water supply network operation 2006 - An effective water disinfection system is absent, - 78% of water is treated in a single stage process, - Environmentally hazardous chemicals (chlorine, ammonia) are applied, - Water treatment technology from specific contaminants is absent. 2008 - Complete elimination of chlorine - UV disinfection of water is 100% - Replacement of ammonia with ammonium sulfate 2009 - 350, 000 m 3/day new water treatment block 2011 - Reconstruction of 500, 800 and 250 thous. m 3/day WTPs 2015
The environmental safety of portable water at the WTPs of St. Petersburg before and after 2003 Zones of possible chemical territory contamination in St. Petersburg after the chlorine container accident at WTPs as of 2003 1. Transition to water disinfection technologies with using safe eco-friendly chemicals Chlorine Main WTP (20 t. ) Northern WTP (25 t. ) Volkovskaya WTP (10 t. ) Southern WTP (25 t. ) - Zones of possible chemical contamination Sodium hypochlorite Kolpino WTP (20 t. ) 2. Introduction of the integrated twostep water disinfection system: Combination of the chemical (reagents) and physical (UV) disinfection methods UV system ü Guarantee of the epidemiological water safety; ü “Closer to consumer” principle; ü Full automation of disinfection processes; ü The largest in Russia; ü Home-grown technology.
UV-disinfection of portable water flocculant ПАУ PAC UV-disinfection units as part of two-stage water supply system Na. Cl. O (NH 4)2 SO 4 Sedimentation tanks The Neva river PS-1 Mixers filters UV-disinfection parameters of St. Petersburg water supply system UV units characteristics UV Clean water tank Description Maximum capacity 5. 5 mio. m 3/day Location Before water enters the distribution system – closer to customers UV equipment type High performance amalgam lamps Sphere of application Water disinfection together with chemical water treatment Commissioning 2004 -2008 PS-2 UV Clean water tank ПНС BPS
Disinfection of water with sodium hypochlorite. Production of sodium hypochlorite. Sodium hypochlorite production at Southern WTP Year of commissioning – 2006. Designed capacity of the plant – 720 tons/day. Overall layout. Sodium hypochlorite production plant at Southern WTP. Sodium hypochlorite production at Northern WTP Year of commissioning– 2008. Designed capacity of the plant– 480 tons/day. Overall layout. Sodium hypochlorite production plant at Northern WTP.
New water treatment block at Southern WTP (K-6 Block) The capacity of New K-6 Block is 350, 000 m 3/day Technologies: Ø Pre-ozonation ØCoagulation Ø Sedimentation Ø Filtration Ø Two-stage disinfection (sodium hypochlorite with ammonium sulfate and ultraviolet) Facilities: Ø Ozonation chamber Ø Mixing chamber ØLamellas ØDual media filters ØClean water reservoirs
Reconstruction of Zelenogorsk WTP. Practical implementation of stateof-the-art iron and manganese removal technologies Water treatment technology at Zelenogorsk WTP Kurortny District of St. Petersburg, Aerator Rapid filters Na. OCl Clean water tank Pumping station-2 Pressure filters Intermorainal aquifer 2005 - Completion of the Zelenogorsk WTP reconstruction Designed capacity after the reconstruction – 10, 000 m 3/day. Krevox European Environmental Centre: Ø Technical solutions Ø Equipment supply At Zelenogorsk WTP : • filters are reloaded and the new drainage system TRITON is installed, • the water aeration system is upgraded, • the new iron and manganese removal technology is implemented at the 2 nd process stage with using catalytic oxidation of iron and manganese compounds in pressure filters, • modern chemical dosing systems and the process monitoring equipment are installed, technical processes at the plant are automated, • water is disinfected by sodium hypochlorite.
Energy efficient production Southern Water Supply Zone Characteristics of Uritskaya PS water supply zone § Pumping station capacity – 60, 000 m 3/day § Length of network – 170 km § Number of customers – 1078 § No. of stories in the serviced buildings – 1 -16 § No. of high-pressure boosting stations – 11 § No. of house connections – 1033 § No. of valves – 824 § No. of fire hydrants – 498 St. Petersburg Southern WTP Uritskaya Pumping Station View of the 3 -lift pumping station after reconstruction Dudergofskaya WTP Results of the Uritskaya Water Supply Zone Modernization Project 1. Hydraulic model is built to optimize the operation of water networks PRESSURE IN THE ZONE BEFORE RECONSTRUCTION (prevention of excess pressure, improved velocities); 2. The pumping stations, equipment and valves are modernized; 3. Automated control of PS operation and the pilot; 4. Water quality monitoring system is implemented at water networks. Uritskaya Pumping Station
Training and professional development of Vodokanal personnel Vodokanal’s Training Centre: Ø Training and professional development of the company personnel; Ø Training of specialists (Professional College No. 89); Ø Contests of workmanship. Types of training: § Compulsory training; § Proficiency maintaining and professional development of staff; § Distance programmes. In January 2011, Vodokanal and Lahti Science and Business Park established the International Advanced Water Technologies Centre!
Vodokanal’s information policy and customer relations Vodokanal’s information policy is based on: Ø Transparency of the company activities, Ø Access to reliable information about the company history and operations, Ø Interaction with the mass media, educational institutions, and public and environmental organizations. . Customer relations: Ø Hot line, Ø Portal “Citizens Feedback” on Vodokanal’s website. Currently, the Hot Line operators receive up to 700 -800 calls a day!
Awareness-raising activities of SUE “Vodokanal of St. Petersburg” Awareness-raising activities Ø Youth Environmental Centre Ø Museum complex The Universe of Water
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