Product category:
Sludge Handling and treatment
News Release from: Johnson Screens UK | Subject: Vertical drain
Edited by the Processingtalk Editorial
Team on 15 February 2008
Improving sludge thickening in
wastewater
A Johnson Screens vertical drain improves the thickening (dryness) of a wastewater sludge by recovering the liquid phase situated under the crust
The sludge from wastewater treatment plants consists of a solid phase suspended in a liquid phase The solid is made up of mineral and organic matter present as flocs
This article was originally published on Processingtalk on 26 Mar 2007 at 8.00am (UK)
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If the sludge is left unagitated, it settles in layers in the bottom of the silo and a pasty crust forms on the surface.
In the intermediate zone, water circulates between the flocs of sludge.
It forms pockets, the majority of which are concentrated near the surface.
The installation of a Johnson Screens vertical drain improves the thickening (dryness) by recovering the liquid phase situated under the crust.
This has many advantages:.
* Economic - Reduction in the volume of sludge and therefore a reduction in the cost of removal and transport.
* Agriculture - Possibility of recycling a higher proportion of fertiliser material.
* Environment - Less energy expended in spreading and reduction in the risk of liquid sludge runoff or infiltration into the ground.
If you would like to know more about the Johnson Screens vertical sludge drain please contact Philip Schofield at the Johnson Screens UK office.
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