Nizhny Novgorod aeration station

Original taken froms1rusin Nizhny Novgorod aeration station

Recently I visited the Nizhny Novgorod aeration station - this is a complex of structures, where all the drains of Nizhny Novgorod and Bor are subjected to full biological treatment for subsequent discharge into the Volga. It all started as a joke during a hike to the water mains "Crimson ridge": someone from the press service of Vodokanal hinted that you can visit a place where everything is not so nice. I am a simple person: they offer - you have to agree.
1. Wastewater can be of three types: domestic, industrial and surface water. By tunnel collectors, they enter the station.

2. Head of the station.

3 Cleaning is divided into mechanical and chemical-biological. Mechanical cleaning is intended for clarification of sewage. This unit consists of a receiving chamber, mechanized grids, sand traps and primary sedimentation tanks.

4. First, the waste liquid comes to mechanical cleaning, where it is separated from solid sediments, passing through the grids, sand traps and primary septic tanks.

5. This is where wastewater flows from the grates, on which large items are screened.On the shallow grille, everything remains the most disgusting. They told that employees often caught at this stage pearls, jewelry makers, and even living beings.

6. All the garbage with a rake is removed from the grate and sent to the conveyor for export.

7. See what a fairy tale! I was preparing for the worst. I thought it would stink throughout the station. Unpleasant smell was only in this building, and then he was very tolerant.

8. The total capacity of the station is 1.2 million cubic meters per day.

9. After the initial purification, the water enters the primary clarifier, where the insoluble particles are deposited. Round reservoir - a reservoir with a cut conical bottom. A pipe is installed in the center of the sump through which wastewater flows to the bottom of the sump.

10. On top of the tanks looks like big dials. The average daily wastewater flow is currently 770.6 thousand cubic meters.

11. The complex stages of cleaning and pumping water require constant and operational control. M2 M solution from Megafon allows quality monitoring of remote sites throughout the station.

12. Employee pumping station, through which water is distilled in the territory.

13. The station has its own full repair and welding shop.

14.

15 Then the effluent enters the biological treatment unit, which includes aeration tanks and secondary sedimentation tanks. Aerotank is a tank of rectangular cross section through which waste water mixed with active sludge flows where biochemical treatment takes place. The air introduced by means of pneumatic or mechanical aerators saturates water with oxygen, which is necessary for the vital activity of bacteria.

16. Shop aeration system, where the air under pressure goes to the aerators aerotank.

17. & Facilities occupy an area of ​​270 hectares. The station was built in two phases: from 1969 to 1975 and from 1979 to 1990.

18. Then, in the secondary sedimentation tanks, the water is separated from the microorganisms and sent for chlorine disinfection, and only after that - clear and transparent - enters the Volga. If you do not know where this water came from and how it looked, I would even swim in one of these reservoirs.

Thanks to the companies Megafon and Nizhny Novgorod water canal for the tour.

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