• Modificated: 22.06.2011
Water treatment works Water supply of Vologda is a complex of technological and engineering structures relatively divided into three components:
  1. Water intake structures
  2. Water treatment works
  3. Water supply systems

The City of Vologda has three main water supply sources:
  • water intake on the Vologda River;
  • water intake on Lake Kubenskoye;
  • water intake on the Toshnya River.

The main water supply source is the Vologda River.

The Vologda River run-off is insufficient for the water supply of the city during summer and winter low water; therefore Lake Kubenskoye is used as a reserve source for this period. The second reserve source in case of emergency situations is the Toshnya River.

Stream intake on the Vologda River is located near the Mikhaltsevo village at the distance of 47 km from the estuary. It was put into operation in 1990; its productivity is 150 thousand cubic metres a day.

A dam in the location of the water intake is used to provide daily run-off control of the Vologda River.

The main problem for surface water supply sources is that the content of organic compounds both in the Vologda River and in Lake Kubenskoye exceeds the norms allowable for water sources. Iron content exceeding permissible standards in the Vologda River and Lake Kubenskoye affects the colour of water distinctly. Iron content in the examined subjects is practically constant.

Departmental wells are used mainly by small-scale enterprises to satisfy their economic and everyday and technical necessities. The North Railway, Rostelekom, Lesokhimzavod and others have wells for water supply needs of the population besides the municipal unitary enterprise of housing and communal services Vologdagorvodokanal.

Water treatment works with the output of 128 thousand cubic meters per day are located on the right bank of the Vologda River, 1,5 km below from the junction of the Vologda and Toshnya Rivers. They consist of 3 blocks of 30, 63, 35 thousand cubic meters per day correspondingly (their deterioration is 65%).

Water to the city mains is delivered from the platform of the treatment works of the water pipe by two pumping stations of the 2nd rise constructed in 1979 and 1995.

The water treatment facilities were reconstructed in 2010 and in the previous years within the framework of the project “Vologda municipal service of water supply and sewage and storm water disposal”. In accordance with the project Construction of airing and ultraviolet disinfection block for the water treatment plants (VOS-1 and VOS-2) the following works were done: an edifice for airing and ultraviolet disinfection block was erected; pipe lines 800 mm and 1000 mm in diameter were built; tests of airtightness and durability were conducted; switching chambers at the blocks of the water treatment plants were constructed; facilities for ultraviolet disinfection and blowing equipment of the airing block were assembled; start-and-adjustment works were carried out; external heating systems were built; exterior finish of the edifice was performed; water counters were installed. In accordance with the projects Modernization of reagent plant 3 and Construction of a block for water treatment plants VOS-4 design work were accomplished, building and assembly jobs began. Reconstruction of the water-pipe treatment facilities will be continued in 2011.

The main problems of the water treatment works are:
  • all three blocks of the treatment facilities need reconstruction and technical reequipment at present;
  • lack of automation of technological control and monitoring of their work and quality of treated water;
  • high power intensity of equipment.

Then purified water goes to the main and distributing networks of the city.

Water is delivered to the distribution network from the pumping station of the 2nd rise through water conduits d = 1200 mm, 3d = 600 mm, d = 900 mm, d = 450 mm.

To maintain the maximum required water head in the city mains, water from the pumping station of the 2nd rise is delivered in accordance with the established schedule taking into account provision of the population with water when it is maximally used. At present 58 pumping plants of the 3rd rise which have large deterioration of their main facilities operate in the city. Because of zone water supply in the city, water supply of the southern part is provided through a zone pumping station which is situated in the microdistrcit of the Vologda Ball-Bearing Plant and is given to the balance of the municipal unitary enterprise of the housing and communal services (MUE HCS) “Vologdagorvodokanal”. The station put into operation in 1991 needs modernization.

The length of water supply networks in Vologda which are on the balance of the MUE HCS Vologdagorvodokanal makes up 584,36 km on January 1, 2011.

The main causes of increased accident rate of the networks are their dilapidation, seasonal soil motions in autumn and spring and electrocorrosion of steel pipe lines along highways with electrotransport and in the places where they cross over electrified railways. The number of ownerless networks, breakthroughs and leakage on them is increasing. It is connected with liquidation of enterprises and owner’s changes.

Insufficient network throughput, a lot of failures of the water-supply networks are important problems.

Sewage and storm water disposal of Vologda is a complex of technological and engineering structures relatively divided into three components:

  1. Collection and transportation of domestic sewage from the population and enterprises of the city. Besides storm water and water from melted snow goes to the sewage network, though the storm sewage system in the city is insufficiently developed.
  2. Mechanical and biological treatment of sewage at the sewage works.
  3. Treatment and utilization of sewage sludge.

Sewage disposal and treatment is completely provided by the city sewerage system run by the municipal unitary enterprise of the housing and communal services (MUE HCS) “Vologdagorvodokanal”.

The sewage system scheme of the city provides for drains in the gravity and pressure conditions to the united sewage treatment facilities.

The sewage works were put into operation in 1964. Their potential output is 150 thousand cubic meter per day with the development prospect to 220 thousand cubic meter per day.

The length of the sewage system in the city of Vologda which is on the balance of the MUE HCS Vologdagorvodokanal makes up 451,41 km on January 1, 2011. The tested capacity of the sewage treatment facilities is 150 thousand cubic meter per day. Their reconstruction will be carried out in 2011. Soil-pipes are made of cast iron, steel, transite, ceramics and ferroconcrete. Their diameters are from 100 mm to 1200 mm.

State analysis of the sewerage networks and facilities shows that discharge manifolds are dilapidated; their deterioration is about 80%. Pumping equipment is characterized not only by high level of obsolescence and depreciation, but by high power intensity.

The sewage treatment facilities, especially their mechanical and electrical parts, require modernization. Their output is insufficient to receive all storm run-offs. Besides, it is necessary to improve biological purification. The most natural improvement is reconstruction of the airing system for better removal of phosphorus and nitrogen. Reconstruction can be carried out by means of installation of new aerators, compressors, pump blocks and automatic equipment. It will improve the quality of water treatment and increase the energy efficiency.

The main goals of the sewage works renovation are the following:
  • to reduce electricity consumption;
  • to increase serviceability of the treatment facilities;
  • to improve treatment results, especially regarding phosphorus and nitrogen, by means of increase of biological purification rate.