Eibis International Worldwide Press Communication Service
 
     
    HOME                                                                                                The Global Technical News Agency
   Finland       France    UK   Bookmark and Share  50th Anniversary: 50 Years Of Global Media Excellence 1959 to 2009   Franchises   

NS4601en

| German | Spanish | English | Finnchain | EIBIS Home |

This story is also available in the languages above

Would you like more information about this story? Click here Customer information request

Fig. 1 The Finnchain system uses constant water flow to remove surface scum in a water treatment tank Fig. 2 Water flow in Finnchain's surface scum removal device. Device parts: 1.Adjusting unit 2.Overflow channel 3.Scum box 4.Overflow box 5. Scum pipe Fig. 3 The level adjuster of surface scum removal system is adjusted with floats.

Fig 1 - High Resolution download - Click Here
Fig 2 - High Resolution download - Click Here
Fig 3 - High Resolution download - Click Here

NEW SURFACE-SCUM REMOVAL SYSTEM
Reduced water consumption and no energy-consuming devices

Nowadays de-nitrification brings an increasing amount of surface scum to wastewater treatment processes. In rectangular sedimentation tanks that use traditional surface scum skimming with a scum pipe, the amount of water needed to carry the scum in the pipes is much greater than that required by the new surface scum removal system introduced by Finnchain Oy of Rauma, Finland.

80% less water required

With this patented surface-scum removal system from Finnchain, surface scum is removed by constant water flow and there is no need for any external energy source (see Fig. 1). It has been calculated that the water consumption needed to remove the surface sludge is ca. 2 m3/day. In the best cases, this is 80% less water than that required when using a traditional system.

With the new Finnchain system, treated water is lead to the overflow channel and surface scum is directed to the scum box from where it is pumped away (see Fig. 2).

No energy-consuming devices

The most significant benefit of Finnchain's new surface-scum removal system is that it does not employ motors or other energy-consuming devices. The amount of surface sludge removed is adjusted by the water flow. Water flow can be adjusted by changing the height of the level adjuster.

Water flow at the surface from the clarifier tank to the overflow box is adjusted by means of a level adjuster. Normal changes (±30 mm) of the water surface level in the tank do not present a problem, because there are floats to maintain the level adjuster at the selected height. Floats change the height of the level adjuster when the water surface in the tank rises or sinks. The amount of water needed to carry surface scum in the scum pipe can be adjusted by using the adjuster in the overflow channel (see Fig. 3).

Orders from Finland and other countries

The system has already been fully field-test and is currently in use at the Hämeenlinna wastewater treatment plant in Finland, where results show that the Finnchain system is working efficiently and that water consumption has been reduced significantly compared to traditional surface scum skimming systems.

Finnchain's scum removal system has been awarded an INNOFINLAND prize in the country's national innovation competition. The award is presented annually as a token of recognition and encouragement to innovative companies by Finland's president.

The new system can also be used in potable water treatment plants and for oil separation. Customers in Finland and other European countries have already placed a number of orders for the new Finnchain system.

Finnchain Oy
Rekitie 1
FI-26510 Rauma
Finland

www.finnchain.fi

Your Name:
Your Company:
Your Address:
Your Country:
Your Telephone no
(inc International code) :
Your E-mail:

Eibis International Worldwide Press Communication Service

Eibis International. Webdesign by www.easy-pc.biz .