The Process and Water Quality Specialists

Trussell Tech Lab

Our in-house research laboratory, located in Pasadena, is equipped to provide supplemental water quality testing and analysis to support our clients. Our experienced staff is able to fully utilize the Trussell Technologies Laboratory and is capable of performing:


Solution Ozone Testing

Solution ozone testing (SOT) is used to evaluate the ozone demand of water, which is significantly affected by water quality. SOT is used to evaluate:
  • Efficacy of ozonation as a pretreatment step
  • Efficacy of ozone-based disinfection
  • Efficacy of advanced oxidation processes (AOP) in reduction of contaminants of emerging concern (CECs)
  • Ozone and hydroxyl radical demand
  • Effect of ozone demand on process design and operations

Low Pressure Collimated Beam Testing

Bench-scale low pressure collimated beam testing is used to evaluate the effects of 254 nm wavelength UV light on disinfection and UV-based AOP. Low pressure collimated beam testing is specific to low pressure UV lamp reactors and is used to evaluate:
  • UV dose response for pathogen inactivation
  • UV dose response for photolysis of CECs
  • UV dose required for achieving desired pathogen inactivation for full-scale reactors
  • UV dose required for achieving desired CEC reduction

Medium Pressure Collimated Beam Testing

Bench-scale medium pressure collimated beam testing is used to evaluate the effects of polychromatic UV light on disinfection and UV-based AOP. Medium pressure collimated beam testing is specific to medium pressure UV lamp reactors and is used to evaluate:
  • UV dose response for pathogen inactivation
  • UV dose response for photolysis of CECs
  • UV dose required for achieving desired pathogen inactivation for full-scale reactors
  • UV dose required for achieving desired CEC reduction
  • Effects of wide spectrum UV photolysis in comparison with 254nm UV for:
    • pathogen inactivation
    • CEC reduction

Microbial Challenge Testing

Microbial challenge testing is used to evaluate the effectiveness of processes on inactivation of microbes. Our laboratory has experience with the coliform, MS2 coliphage, and Cryptosporidium. Our laboratory has used the modified EPA 1601 method for the detection of low concentrations of indigenous F+ male specific coliphage. This method allows us to measure concentrations far below 1 phage per mL, which is the limit of traditional double agar layer method. Microbial challenge testing is used to evaluate:
  • Ambient density of indigenous microbes
  • Pathogen reduction

Organics Analysis

In support of research on organics, our capabilities include analysis of:
  • BOD (biochemical oxygen demand)
  • COD (chemical oxygen demand)
  • TOC (total organic carbon) using the GE Portable Sievers 5310C TOC analyzer with an autosampler
  • BDOC (biodegradable organic carbon)
  • EEM (excitation-emission matrix) using the Auqualog benchtop Fluorometer manufactured by Horiba Scientific
The emission excitation matrix is used to:
  • Characterize organic matter in water
  • Evaluate the treatment performance, including secondary treatment, membrane separation, soil aquifer treatment, and advanced oxidation processes

Chlorine Analysis

Chlorine analysis is used to evaluate the concentrations of free and total chlorine. Our laboratory is capable of several methods for chlorine analysis, including DPD, indophenol, and amperometric titration. The DPD method is used to evaluate both free and total chlorine. The Indophenol method is used to evaluate free chlorine. Amperometric titration is used for total and free chlorine using both forward and backward titration. Chlorine analysis is used to evaluate:
  • Chlorine concentrations
  • Chlorine contact time
  • Chlorine decay over time
  • Variations in results between the methods
  • Calibration/verification of the different methods

Field Testing

Field testing is used to evaluate water quality parameters on-site at pilot testing and full-scale facilities. Our lab is capable of testing several water quality parameters in-situ including but not limited to free and total chlorine, free and total ammonia, nitrate, nitrite, copper, and dissolved oxygen.

Method Development

The experienced staff at Trussell Technologies understands that many problems with water and wastewater resources are emerging with newly discovered or validated contaminants. Often times, these constituents do not have adequate or standard methods developed for testing or treatment. As a company with a strong foundation on science, our highly qualified personnel are able to both modify and develop methods based on individual needs.

Other Water Quality Analysis

Trussell Technologies Laboratory has the capability of running other water quality tests, including inorganic measurements (nitrate, nitrite, ammonia, alkalinity, TSS, etc.), simulated distribution testing, and jar testing. Contact us at our Pasadena office to learn more about our other functionalities and services.