Time filter

Source Type

Fredericton, Canada

Travis B.,Musso and Bellemin Inc | Tracey D.,LuminUltra Technologies Ltd.
Membrane Technology | Year: 2015

This case study reveals how an enhanced biological monitoring strategy was deployed to overcome serious operational challenges at a membrane-based purification plant. The plant was constructed in response to issues associated with disinfection by-product formation due to direct chlorination of groundwater, but ended up suffering major problems when biological fouling within the system brought it to a standstill.

Tracey D.,LuminUltra Technologies Ltd. | Travis B.,Compliance
American Water Works Association (AWWA) 2013 Distribution Systems Symposium/Emergency Preparedness and Security Conference and Exposition | Year: 2013

• 2nd Generation ATP monitoring provides a significantly more complete picture of total bioburden than culture-based techniques. • Through simple and portable test protocols and no incubation requirements, tests can be done in the field thus enabling on-the-spot identification and mitigation of problems. • Since all species of microbe contain ATP (including nitrifying bacteria), it serves as an excellent condition monitoring tool to reveal changes from baseline condition, regardless of the species involved. © 2013 American Water Works Association AWWA DSS/EPS Conference Proceedings All Rights Reserved.

Brault J.-M.,Ecole Polytechnique de Montreal | Whalen P.,LuminUltra Technologies Ltd. | Stuart P.,Ecole Polytechnique de Montreal
Environmental Technology | Year: 2011

A research project was undertaken at an integrated thermomechanical pulp and paper mill in Canada to evaluate the use of adenosine triphosphate (ATP) monitoring methods in order to identify the potential for operational problems related to microbiological aspects of activated sludge. The specific filamentous bulking ATP (fbATP) ratio is an emerging measurement technique that measures the proportion of flocs that have bulking potential by filtering a sample through a 250 ì m mesh and measuring the ATP in the retentate. For the host mill in this study, the specific fbATP measurement provides early warning signs of bulking, at 1.0 to 1.5 times the sludge age, before poor settling occurs. A possible bulking scenario was identified in which the initiator was the overflow of an upstream tank containing high BOD whitewater, resulting in spikes of organic acids to the treatment and promoting the proliferation of certain types of filamentous bacteria. A storage response by filamentous bacteria to these high readily biodegradable substrate conditions was monitored with fbATP. By predicting the onset of bulking conditions, this technique can potentially assist operators to make corrective actions proactively. © 2011 Taylor & Francis.

Passman F.J.,Biodeterioration Control Associates, inc. | Whalen P.A.,LuminUltra Technologies Ltd.
Tribologie und Schmierungstechnik | Year: 2013

An integral component of the ASTM process for new standard test methods is to perform an interlaboratory study (ILS). In January 2011, ten companies participated in an ILS for ASTM E 2694 Method for Measurement of Adenosine Triphosphate in Water-Miscible metalworking Fluids. The ILS included samples of emulsifiable oil, semi-synthetic and synthetic metalworking fluid formulations with ATP bioburdens ranging from 0.3 Log10 pg ATP mL-1 to >5.0 Log 10 pg ATP mL-1. This presentation discusses the ILS test plan design and results.

Tracey D.,LuminUltra Technologies Ltd.
Journal - American Water Works Association | Year: 2014

Limitations in flushing optimization mostly lie with the tools that have historically been available to field technicians. Turbidity measurements are routinely used to guide flushing from a microbiological perspective. Disinfectant residual is often used to indicate an end-point for flushing, but this method is not ideal on its own. Flushing based on pre-determined time periods tends to over-compensate for this lack of tools, usually at the expense of a great deal of time and water. The missing link is the inability to quantify microbiological contents in water while in the field. Culture-based tools like heterotrophic plate counts that are typically used for microbiological monitoring in flushing operations are impractical because of the incubation times required to return results and must be conducted in a controlled laboratory environment.

Discover hidden collaborations