Implementation of advanced technical solutions of St.Petersburg Vodokanal in the city

1. 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”

2. Safe water supply as a factor of favorable living environment • safe portable water in terms of epidemiology and radiology; • minimal environmental impact thanks to the use of environmentally safe chemicals and technologies; • responsibility before customers at present and in future through solicitous attitude to the natural resources; • energy-efficient processes; • well-qualified personnel guarantying accident-free, effective operation; • interaction with customers and awareness-raising work.

3. St.Petersburg Water Supply System Water Supply Zones of Main Water Treatment Plants Service area –1,453.1 km2 Served population –4.8 mio people. Zelenogorsk WTP Specific water consumption 2011–168 l/day*person • Description of the water supply system as of 01.01.2012 • water supply sources: • the Neva River– 98% • underground water and mixed source –2% • number of water treatment plants – 9 • number of boosting pumping stations – 200 • length of water networks– 6 665 km • daily average water supply from WTPs – 1,922.900m3/day. Main WTP Kronshtadt WTP Northern WTP Volkovskaya WTP Lomonosov WTP Southern WTP Northern water supply zone (589.0 km2) Southern water supply zone (727.6 km2) Kolpino WTP Central water supply zone (136.5 km2) Dudergofskaya WTP WTP – water treatment plant

4. Water Consumption by the population of St.Petersburg Specific water consumption in St.Petersburg, l/person*day l/person

5. Provision of guaranteed safe portable water to the population of St. Petersburg Increase in the percentage of water samples meeting the standards at WTP outlets - Reconstruction of 500, 800 and 250 thous.m3/day WTPs - 350,000 m3/daynew water treatment block - Complete elimination of chlorine - UV disinfection of water is 100% - Replacement of ammonia with ammonium sulfate - Optimization of the water supply network operation - Implementation of the UV disinfection at 72% of the facilities - Implementation of a system to ensure water supply security after detection of toxic substances - Replacement of chlorine with sodium hypochlorite at 75% of the facilities 2006 2015 2011 2005 2009 2008 2003 - 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.

6. Main WTP (20 t.) Northern WTP (25 t.) Volkovskaya WTP (10 t.) Southern WTP (25 t.) Kolpino WTP (20 t.) - Zones of possible chemical contamination The environmental safety of portable waterat 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 Sodium hypochlorite UV system • Guarantee of the epidemiological water safety; • “Closer to consumer” principle; • Full automation of disinfection processes; • The largest in Russia; • Home-grown technology. 2. Introduction of the integrated two-step water disinfection system: Combination of the chemical (reagents) and physical (UV) disinfection methods

7. UV-disinfection of portable water UV-disinfection units as part of two-stage water supply system flocculant NaClO (NH4)2SO4 ПАУ PAC Sedimentation tanks UV UV Clean water tank Clean water tank The Neva river Mixers ПНС PS-1 BPS PS-2 filters UV-disinfection parameters of St.Petersburg water supply system

8. Disinfection of water with sodium hypochlorite. Production of sodium hypochlorite. Sodium hypochlorite production at Northern WTP Sodium hypochlorite production at Southern WTP Year of commissioning– 2008. Designed capacity of the plant– 480 tons/day. Year of commissioning – 2006. Designed capacity of the plant – 720 tons/day. Overall layout. Sodium hypochlorite production plant at Southern WTP. Overall layout. Sodium hypochlorite production plant at Northern WTP.

9. New water treatment block at Southern WTP (K-6 Block) The capacity of New K-6 Block is 350,000 m3/day • Facilities: • Ozonation chamber • Mixing chamber • Lamellas • Dual media filters • Clean water reservoirs • Technologies: • Pre-ozonation • Coagulation • Sedimentation • Filtration • Two-stage disinfection (sodium hypochlorite with ammonium sulfate and ultraviolet)

10. Rapid filters Pressure filters Pumping station-2 Aerator NaOCl Reconstruction of Zelenogorsk WTP. Practical implementation of state-of-the-art iron and manganese removal technologies Water treatment technology at Zelenogorsk WTP Kurortny District of St. Petersburg, Clean water tank Intermorainal aquifer 2005 - Completion of the Zelenogorsk WTP reconstruction Designed capacity after the reconstruction – 10,000 m3/day. • Krevox European Environmental Centre: • Technical solutions • 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 technologyis implemented at the 2nd 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.

11. PRESSURE IN THE ZONE BEFORE RECONSTRUCTION Uritskaya Pumping Station Energy efficient production • Characteristics of Uritskaya PS water supply zone • Pumping station capacity – 60,000m3/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 Southern Water Supply Zone St. Petersburg Southern WTP View of the 3-lift pumping station after reconstruction Uritskaya Pumping Station Dudergofskaya WTP Results of the Uritskaya Water Supply Zone Modernization Project Hydraulic model is built to optimize the operation of water networks (prevention of excess pressure, improved velocities); The pumping stations, equipment and valves are modernized; Automated control of PS operation and the pilot; Water quality monitoring system is implemented at water networks.

12. Training and professional development of Vodokanal personnel • Vodokanal’s Training Centre: • Training and professional development of the company personnel; • Training of specialists (Professional CollegeNo. 89); • 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! 

13. Vodokanal’s information policy and customer relations • Vodokanal’s information policy is based on: • Transparency of the company activities, • Access to reliable information about the company history and operations, • Interaction with the mass media, educational institutions, and public and environmental organizations. . • Customer relations: • Hot line, • Portal “Citizens Feedback” on Vodokanal’s website. Currently, the Hot Line operators receive up to 700-800 calls a day!

14. Awareness-raising activities of SUE “Vodokanal of St. Petersburg” • Awareness-raising activities • Youth Environmental Centre • Museum complexThe Universe of Water

15. THANK YOU FOR YOUR ATTENTION !