Wastewater Treatment Case Studies and White Papers

  1. Town Of Hillsborough Relies On Hach For Free-Ammonia Testing And Nitrification Control
    When Bay-area water wholesaler San Francisco Regional Water System (SFRWS) changed its residual drinking water disinfection process from chlorine to chloramine, the town of Hillsborough’s Water Quality staff faced the challenge of updating its water testing procedures to prevent nitrification and continue to meet state-mandated drinking water quality standards.
  2. 4 Key Water Themes Predicted To Shape 2015

    When considering the current state of the water and wastewater industry, water metering is an important part of the conversation.

  3. Are Test Strips Still Relevant For Water Analysis?

    Today’s environmental laboratories are audited and accredited companies where quality control (QC) and quality assurance (QA) reign. Advanced technology is needed to measure parameters for regulatory compliance down to parts per billion. In a world of regulatory mandates, can test strips still be used for water analysis?

  4. The Decomposition Kinetics Of Peracetic Acid And Hydrogen Peroxide In Municipal Wastewaters

    Efficient control of microbial populations in municipal wastewater using peracetic acid (PAA) requires an understanding of the PAA decomposition kinetics.

  5. Aeration System Helps WWTP In Mexico Meet Regulations
    The Municipality of Emiliano Zapata in the state of Morelos, Mexico, located 60 miles south of Mexico City, is on an area of great hydrological affluence.
  6. BioCon®: A Class A Solution

    The Picnic Point Wastewater Treatment Facility was faced with reaching their plant processing capacity. The plant was sending its biosolids to be incinerated and part of this challenge was to find a way to manage the biosolids produced by this facility. Hauling and disposing of this sludge was difficult and becoming expensive. It was desirable to have a Class A biosolid to alleviate this concern and be more environmentally conscious.

  7. Is There A Correlation Between ATP And Other Traditional Microbiological Methods?

    Perhaps the most common question that we’re asked is how our ATP tests correlate with traditional microbiological methods.  Unsurprisingly, when people are used to getting their information in a certain way, they naturally want to know how a new method will stack up against it.  However, the mechanisms of culture-based techniques and ATP analyses are completely different, and in many ways, so are the results they produce. 

  8. WWTP Reaches Clog-Free Operation With Self-Cleaning Impellers

    As with many plants modified for activated sludge treatment, the existing infrastructure at the Adams Field Wastewater Treatment Plant in Little Rock, AR, allowed rags and other debris to clog the impellers of the submersible pumps. One of the plant’s two 15-horsepower pumps was replaced with an 18-horsepower RAS submersible pump with a self-cleaning impeller, virtually eliminating the clogging problem by simply pumping away any debris that reaches the pump intakes.

  9. White Paper: Biological Nutrient Removal Microbiology Metabolic Pathways of Biological Nutrient Removal
    Biological Nutrient Removal (BNR) is critical for the preservation of our lakes and streams... Large amounts of waste products are passed through our sewage treatment systems on a continuous basis...
  10. Replacement Vacuum Feeders For Hypo Treatment End Heavy Feeder Maintenance Burden At WWTP

    The instrumentation supervisor for the City of Baltimore, MD’s 150-MGD Back River wastewater treatment plant (WWTP) reports that replacement of problematic vacuum feeders with more advanced vacuum feed units has ended heavy maintenance burdens associated with sodium hypochlorite (hypo) treatment of plant effluent. By Cliff Lebowitz