Treatment Of Waste Water In The Gulf Of Finland

Treatment Of Waste Water In The Gulf Of Finland

Saint-Petersburg central aeration station located near the Gulf of Finland takes in sewage wastes that come from the central part of the city. Let’s see how they process the water before it enters the Gulf.

Treatment Of Waste Water In The Gulf Of Finland

The station is located on an artificial island Beliy (White Island). The island was created in 1966 when the area was increased from 16 to 55 hectares. The station was put into operation in 1978 whereas the second line of purification plants was launched in 1985. This aeration station processes up to 1.5 million cubic meters of wastes a day. Through 2 other largest city’s wastewater treatment plants –  the Northern aeration station and the Southwest wastewater treatment plant-  more than 800 million m3 of sewage is discharged annually, which makes two thirds of all waste waters in St. Petersburg.

Treatment Of Waste Water In The Gulf Of Finland

First and foremost, wastes are accepted by the main pump station.

Treatment Of Waste Water In The Gulf Of Finland

After that the wastes go 55 meters high and undergo mechanical and biological cleaning.

Treatment Of Waste Water In The Gulf Of Finland

Mechanical cleaning is the first stage. Water is freed from garbage that wasn’t found by traps on the main pump station.

Treatment Of Waste Water In The Gulf Of Finland

Here trap holes are decreased up to 6 mm. Mobile phones, ornamental and bodies of kittens and pups are found at this stage.

Treatment Of Waste Water In The Gulf Of Finland

At the next stage water is separated from the sand which is later taken to a special polygon.

Treatment Of Waste Water In The Gulf Of Finland

Water undergoes two types of cleaning including mechanical and biological ones. Streams are distributed over primary drain boxes.

Treatment Of Waste Water In The Gulf Of Finland

This pump station deals with crude residue.

Treatment Of Waste Water In The Gulf Of Finland

The station is equipped with 12 aerotanks with corridors that are 200 meters long and intended for biological cleaning.  The aerotanks are used to carry out the process of wastes biological oxidation with the help of forced air and active mud microorganisms.

Treatment Of Waste Water In The Gulf Of Finland

The station also contains 12 primary and secondary traps for mechanical cleaning.

Treatment Of Waste Water In The Gulf Of Finland

Spill of an aerotank which is a mixture of active mud and purified waste water that goes to secondary traps.

Treatment Of Waste Water In The Gulf Of Finland

This aerotank is used for air supply.

Treatment Of Waste Water In The Gulf Of Finland

Last stage of cleaning.

Treatment Of Waste Water In The Gulf Of Finland

Secondary trap.

Treatment Of Waste Water In The Gulf Of Finland

The yellow appliance is called a mechanical rake. It absorbs separated mud.

Treatment Of Waste Water In The Gulf Of Finland

This is where purified water from the station goes.

Treatment Of Waste Water In The Gulf Of Finland

Mud left in the process of cleaning is burnt at the plant built in 1997.

Treatment Of Waste Water In The Gulf Of Finland

First the residue is dried with the help of Flottweg centrifuges and then goes to furnaces where it is burnt.

Treatment Of Waste Water In The Gulf Of Finland

The Stop button.

Treatment Of Waste Water In The Gulf Of Finland

Residue is burnt in the furnaces.

Treatment Of Waste Water In The Gulf Of Finland

The ash will be taken to a special polygon.

Treatment Of Waste Water In The Gulf Of Finland

But before that it will be put in closed containers.

Location: Saint-Petersburg

via riverpilgrim

11 thoughts on “Treatment Of Waste Water In The Gulf Of Finland”

    • Russia would have had the money, but obviously some other projects, like Bulava (buhahahahaha!), are more important. So it was funded by EU invesment funds, and Finland donated some $20M for the project.

      Technology comes from Finland. Russia lacks (also) that kind of technical capabilities.

  1. Very disappointing that the waters are dumped int he gulf. That has to be murder on the ecosystem. In Florida much of the sewer water is purified and used for irrigation of non-farming products (like decorative landscaping). That is a much bettter way to dispose of sewer water. Of course when it is done being purified it is almost considered potable.

    • Sorry to say it is almost every street now. It is a shame because your’re not supposed to water your backyard citrus with the recycled stuff.

  2. Here’s a link to the economic background of this plant: http://www.ymparisto.fi/default.asp?contentid=363933&lan=en

    It’s not too far fetched to say that the Finns financed it.

  3. Funny how the comments saying that the plant was financed by Finns and the EU are hidden due to bad rating.

    It’s still the truth. But hey, this is russia. Pravda and all.

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