Most Wanted Microbes – Candidatus Accumulibacter

From the editor: This is the eleventh post in an ongoing series profiling microorganisms of particular significance in water and wastewater systems. In this series we will cover microorganisms of many types including some that are beneficial, inhibitory and pathogenic. Candidatus Accumulibacter is a phosphorus accumulating organism (PAOs), meaning it can store copious quantities of phosphorus under specific conditions in a process referred to as enhanced biological phosphorus removal. Systems that select for Candidatus… Read More

Most Wanted Microbes – Iron Reducing Bacteria (IRB)

  While sulfate reducing bacteria (SRB) are widely known as a major cause of MIC in carbon steel, other bacteria with different physiological properties have been identified as potential contributors in the corrosion process as well.  Iron reducing bacteria (IRB), for example, are heterotrophic facultative anaerobes which reduce ferric ions to ferrous ions under anaerobic… Read More

No Grey Area to This Issue: Slimes of All Colours Can Cause Costly Problems in Papermaking Processes

  Pink, orange, red, brown and grey – paper mill slimes can come in an endless range of colours.  What contributes to these variances in colour? Microorganisms.  Different species – which live within a slime – produce different hues.  Unfortunately, you won’t find gold at the end of that rainbow.  In fact, it’s quite the… Read More

Most Wanted Microbes – Coliforms

From the editor: This is the ninth post in an ongoing series profiling microorganisms of particular significance in water and wastewater systems. In this series we will cover microorganisms of many types including some that are beneficial, inhibitory and pathogenic. Coliforms are a group of gram-negative, rod-shaped bacteria that generally belong within the family of… Read More

Most Wanted Microbes – Cyanobacteria (a.k.a. Blue Green Algae)

  An image search for the term “algae” quickly reveals a page filled with photos of green-colored surface water. Many of these green blooms that often invade our lakes and rivers are well known by water treatment professionals and the public as ‘blue-green algae’. It’s responsible for beach closures, public health risks, and creates significant… Read More