- 29 April 2008 -
Filtering waste: From residues to nutrients
The growing number of biogas plants makes it increasingly difficult to return the fermentation residue substrates to green spaces or arable land. We take a look at a way of treating the fermentation residue substrates so that they can be discharged and re-used.

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- 7 November 2007 -
Wastewater treatment: Advanced suspended growth technology
Activated sludge processing has been around for some time. Andrew Whittaker, Process Engineer for Severn Trent Services, explains how a modification of this procedure - advanced suspended growth technology for wastewater treatment - can meet total nitrogen standards.

- 12 September 2007 -
The membrane bioreactor in sewage treatment
The membrane bioreactor has become an important processing tool in the treatment of waste liquids. Ken Sutherland looks at its technology and applications.

- 29 August 2007 -
Membrane technology: Removing contaminants in wastewater
A team of researchers in Singapore have developed a robust free standing TiO2 nanofibre membrane which, they believe, could be a cost and energy efficient way of cleaning wastewater.

- 15 August 2007 -
Crumb rubber for wastewater filtration
Can old tyres be an effective filter medium? Yue-Feng Xie, Bryon A. Killian and Andrew S. Gaul look at using crumb rubber from waste tyres when filtering wastewater.

- 1 August 2007 -
Introduction to membranes: fouling control
As part of a series of articles looking at membrane filtration technology in water and wastewater treatment, Graeme Pearce looks at the key issue of fouling.

- 23 November 2006 -
Raising the standard of industrial wastewater
Upgrading a plant to meet new discharge standards while working in limited site space presents a unique challenge. A carbon treatment system combined with wet air regeneration proved to be an effective solution, say John Meidl and CC Lu from Siemens Water Technologies. more

- 18 October 2006 -
Sludge drying: The small footprint alternative
A growing population in Florida , USA is producing increased wastewater flow, making it harder for authorities to dry the digested sludge effectively. Sludge drying beds were not a viable option - but centrifuges proved to be a suitable replacement. more

- 20 September 2006 -
Aquatech - innovation awards
www.filtsep.com takes a look at a few of the products that have been entered for an innovation award as part of the Aquatech show, taking place in Amsterdam later this month. more