Top 3 Things I Learned at WEFTEC 2018

  Whether I’m talking to attendees or customers in our booth at WEFTEC, or attending presentations, I always walk away with valuable information. That is the key, as you’ll see in my #1 take-away from WEFTEC.   1. Data ≠ Information I initially heard this statement during Dr. Mark van Loosdrecht’s presentation on wastewater microbial… Read More

Sequencing Your Bioreactor – Who’s Doing the Work?

  Metagenomics through the incorporation of next generation sequencing (NGS) is changing the way wastewater treatment plants are monitored and understood. NGS can be used in aerobic and anaerobic systems to monitor for problematic organisms, such as filamentous and foaming bacteria, and beneficial organisms, such as ammonia-oxidizing bacteria and methanogens. NGS is also allowing old… Read More

Most Wanted Microbes – Methanogens

  From the editor: This is the thirteenth 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.  Methanogens are a group of microbes that produce methane gas through the breakdown of… Read More

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 – 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 – Nitrifiers (a.k.a. Nitrosomonas)

  From the editor: This is the fourth 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.  Nitrification is a two-part process whereby ammonia is converted to nitrate. The first step… Read More

Most Wanted Microbes – Kouleothrix (a.k.a. Roseiflexus)

  From the editor: This is the second 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.  Kouleothrix is a filamentous organism found in wastewater treatment systems. They appear as thread-like… Read More

Most Wanted Microbe – Escherichia coli

  From the editor: This is the inaugural 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.  Escherichia coli or E. coli is a species of bacteria commonly found in the… Read More

The Cost of High Solids in Your Wastewater Treatment Plant

  Conventional activated sludge wastewater treatment plants (WWTP) operate with solids (mixed liquor suspended solids ­– MLSS) concentrations ranging from approximately 1500 to 5000 mg/L. In membrane bioreactors (MBRs), typical MLSS concentrations are even higher (10,000 to 12,000 mg/L). A higher concentration can be advantageous as they allow for smaller aeration tanks while performing the… Read More