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

Enhanced Biological Phosphorus Removal – Who’s doing the work?

  Enhanced biological phosphorus removal (EBPR) was first documented in the early 1970’s. Traditionally it has been understood that EBPR requires a first stage anaerobic zone that is free of nitrate and nitrite. In the anaerobic zone, phosphorus accumulating organisms (PAO) utilize energy from stored polyphosphate to assimilate volatile fatty acids (VFAs) and produce polyhydroxybutyrate… Read More

How often should I measure ATP in my wastewater treatment plant?

  LuminUltra’s 2nd Generation ATP has many potential uses within a wastewater treatment plant (WWTP), including: diagnosing acute and chronic toxicity, optimizing solids concentrations in the aeration tank, optimizing dissolved oxygen setpoints and identifying sludge bulking events. How often you should measure ATP depends on the quantity of data you’ve collected, the operational performance of… Read More

[Video] Microbiological Monitoring in Water: Past, Present & Future

  The first ever Microbe Detective’s Microbiome Water Summit was held in Chicago at the Shedd Aquarium on September 29, 2017. It was held to coincide with the Water Environment Federation’s annual WEFTEC conference and exhibition (September 30-October 4, 2017). The Summit was well attended by a mix of consultants, technology providers, academics, utilities and… Read More

Top 3 Questions from WEFTEC17

  WEFTEC17 proved to be one of the best ones yet for LuminUltra! Here are top three questions we were asked: 1. Can you measure ATP in anaerobic systems? Yes, ATP can be measured in aerobic, anoxic and anaerobic systems. ATP is a measure of total biomass and is not specific to any one functional… Read More

Using ATP in Suspended Growth Wastewater Treatment Systems – What is the benefit?

  Suspended growth systems, such as activated sludge, are a very common form of secondary wastewater treatment. The potential to optimize and improve the operation of such treatment plants using ATP is tremendous. ATP can directly quantify active biomass, which is key to providing secondary treatment. Two of the many potential uses for ATP in… Read More

Why won’t total microbial content decrease after UV treatment?

  UV treatment only recently became widely adopted in the water and wastewater treatment industries but the benefits of sun exposure for water purification have been acknowledged for thousands of years. Ancient Sanskrit and Greek writings dating as far back as 4,000 B.C. identify exposure to sunlight as one of the recommended water treatment methods… Read More