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Pumping of activated sludge, Dellach, Austria

The project:


For the service and inspection of the aeration system, the activated sludge basins are emptied every two years.


Executing companies

Sonnek Engineering GmbH (Tsurumi partner)

Abwasserverband oberes Drautal-Weissensee


The problem:


Pumping of activated sludge in a community sewage treatment plant. Basin depth: 6m.

For the service and inspection of the ventilation system, the activated sludge tanks are emptied every two years.

The activated sludge has a dry substance content of 1.5 to 2%.

During emptying of the basin, the circulation and mixing of the sludge is turned off, and the sludge forms a sediment on the bottom. Pumping time 2 days.

In the floor of the basin there is a 100mm deep sump, meaning that when the basin is emptied the sludge remains lying on the bottom. It must be removed.


The solution:


Use of a Tsurumi model KRS2-80 pump with an agitator. This pump was leased from the Tsurumi inventory for the purpose.

The pump is submerged by only 100-200 mm, running in snore mode, and the sludge is manually transported to the pump with scrapers and pumped away. Pumping time 1 day.

The bottom sludge has about 3-5% dry substance.

The basin could not be emptied with the standard wastewater pump available, since its motor had no cooling and underwent thermal shutdown.

При употреба на абразивни и корозивни материали, в някои компоненти естествено ще се появи силно износване. Във връзка с по-горното приложение, износване ще възникне предимно в импелера, агитатора, засмукващата плоча, ръкава на вала, масления пръстен, механичното уплътнение, корпуса на помпата, цедката, корпуса на двигателя и смукателния куплунг. В зависимост от условията на работа на експлоатационният живот на официалния гаранционен срок.
В тази връзка, моля, обърнете внимание на нашите общи условия които ние също ще ви изпратим по пощата при поискване.