News & Opinion

Garbage in, garbage out?

There has been a lot of publicity lately regarding sludge. Whether it is the energy we produce from it, how we dispose of it, recycle it or just handle it, it is - rightly - a subject of...

15 August 2016

News & Opinion

Grit removal - a totex opportunity

A good model by which the water industry can test the total expenditure (totex) model is the process of grit removal in wastewater treatment. By removing more, and finer, grit at the inlet works,...

31 May 2016

News & Opinion
Image of two disconnected water pipes

The Whole Life Disconnect

Is the UK water industry making sufficient progress towards its goal of embedding Whole Life Costing into its procurement, contracting and operating processes? As I've written before, in order to...

21 April 2016

News & Opinion

The Cost Of Grit - Calculating Savings

While wastewater treatment plant owners and operators may understand that grit causes damage, reduces plant effectiveness and increases maintenance and repair costs, many still find it difficult...

21 March 2016

News & Opinion
Photograph of a WWTP operator cleaning accumulated grit

The Cost Of Grit - the seven questions that WWTPs should be asking

Finding accurate evidence of the true cost of grit to a wastewater treatment plant may be a challenge for WWTP operators – especially when justifying the installation of more advanced removal...

11 March 2016

News & Opinion

The Cost Of Grit - Q&A with Keith Hutchings

Q. Is grit a significant factor in the cost of running a Wastewater Treatment Plant (WWTP)? If so, how? A. The abrasive nature of grit has long been recognised as a major factor causing wear and...

22 December 2015

News & Opinion
Settled grit clogs wastewater treatment processes

Technically Speaking: Grit Removal

Grit entering the process stream of a wastewater treatment works has always posed a threat by raising operating costs and impacting on energy efficiency. But the heavy burden in energy, materials,...

16 December 2015

News & Opinion
Accumulated grit - TOTEX must take into account lifetime maintenance costs

TOTEX - Balancing Risk & Reward

Getting the right balance between risk and reward is a critical success factor for any business, but for UK water companies those cash prizes and penalties are driven by a regulator, through their...

14 December 2015

News & Opinion
A typical aerated grit basin

Intermittent operation - an irresistible attraction?

Operating wastewater treatment plant processes or equipment intermittently offers the irresistible attraction of reduced energy costs. But take the practice too far, or in the wrong circumstances,...

2 December 2015

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