Industrial and Municipal Wastewater
In a research project supported by the Ontario Clean Water Agency (OCWA) and the Region of Peel, MANTECH put its photoelectrochemical Chemical Oxygen Demand (PeCOD) method to the test in real-world conditions at a Wastewater Treatment Facility near Mississauga, Ontario. An abstract of key findings from that project was presented at the 2017 Water Environment Association of Ontario (WEAO) annual conference in Ottawa.

The study demonstrated that the real time data provided by MANTECH’s PeCOD Analyser enables municipal wastewater treatment operators to make quick decisions that enhance environmental protection and generate substantial savings on chemical and energy use. PeCOD technology is well-suited for use by industrial wastewater treatment facilities that demand fast, reliable results and easy-to-use systems for treating bulk wastewater from multiple industries including automotive, steel, chemical and dairy facilities.

In a recent study, the PeCOD Analyser was deployed by a Clean Harbors Canada’s industrial wastewater facility in Guelph, Ont. The plant uses heavily refined chemical precipitation processes to remove heavy metals, suspended solids and organics to generate safe effluent for discharge into the municipal water treatment system.

Results of the study showed a strong correlation between the green, 15-minute PeCOD method for testing chemical oxygen demand (COD) and standard dichromate COD (CODCR) and five-day BOD (BOD5) methods. By providing real time COD analysis and reliable BOD estimates, PeCOD has helped Clean Harbors save money and increase profits while improving workplace health and safety by eliminating the use of dichromate, mercury and concentrated acid required by standard testing methods. To learn more, read the case study.

“The speed of [PeCOD® Analyser] results creates a more efficient process and really drives clean compliance for us, which is critical.” Ian Culverwell, General Manager, Clean Harbors, Guelph

   
Pulp and Paper
PeCOD technology is a safe and effective solution for improving wastewater treatment and optimizing the use of chemicals in pulp and paper mills.  Real time data about COD in the wastewater stream allows operators to optimize and reduce the use of chemicals in their processes upstream, saving money while protecting the health of workers and the downstream environment. Arauco, a Chilean pulp and paper company, has been using a PeCOD Analyser from MANTECH in full-scale operations since 2013. As a result, the company has reduced the use of hypochlorite in its bleaching processes with no loss of product quality, and decreased the amount of organics in its wastewater stream. The net result was a further reduction in chemicals and energy used in water treatment that saved the company US$3 million in the first year.
   

Food and Beverage
In 2015, MANTECH’s PeCOD Analyser was selected to provide water quality analysis for three pilot projects examining water and wastewater testing in Ontario’s food and beverage industry. Supported by The Bloom Centre for Sustainability, the study looked at the potential of new real time chemical oxygen demand (COD) methods for saving processors time and money by providing them with a continuous picture of what is going on in their wastewater systems.

For the project, MANTECH’s PeCOD Analyser was installed at a winery, a brewery and a bakery to provide real time measurements and analysis of wastewater effluent at each facility. The analysers automatically collected and tested samples at each facility over a four- to six-week period. The data was compared to a second set of samples collected at each site and sent to a laboratory for independent COD and BOD testing.

The result: tests confirmed that the real time capabilities of the PeCOD Analyser can be used to provide accurate BOD estimates within 15 minutes, compared to the five-day turnaround for traditional BOD testing. The pilot projects demonstrated that real time COD can be used to improve water and wastewater management in the food and beverage sector.

“You have to measure it to manage it. This provides food processors with the accuracy of a laboratory test without the need for a lab facility or highly trained technician.” Michael Fagan, Senior Vice President, BLOOM

   

Brewing
PeCOD is an integral part of the Brü Clean System, a specialized wastewater treatment process developed by Econse Water Purification Systems for the craft brewing industry. Together they helped reduce the amount of wastewater for treatment by 75 per cent.

“We can accomplish in a few minutes what other companies take weeks or months to do and this lets us move straight to effective treatment solutions for our clients.” Derek Davey, Econse Water Purification Systems

MANTECH joined the project in 2015 after the Ontario Ministry of Agriculture and Rural Affairs launched a case study that aimed to reduce the impact of waste water produced by Ontario’s craft brewing industry.

Craft breweries can produce five to 10 litres of wastewater for every litre of beer that they package and sell. High in organic matter and suspended solids, the wastewater’s impact can be equivalent to adding another small town to a municipality’s water treatment burden. It’s also a challenge for brewers when they must pay water consumption surcharges and find ways to optimize their processes.

The PeCOD Analyser has proven to be an invaluable tool in accessing brewery wastewater organic load, and provides real time results using an environmentally green and safe method. The system has helped reduce the amount of wastewater generated by the brewing process by up to 75 per cent, which translates to a smaller environmental footprint and lower costs.

   

Drinking Water
In addition to providing 15 minute chemical oxygen demand (COD) results and biochemical oxygen demand (BOD) estimates, the PeCOD Analyser measures natural organic matter (NOM) in fresh and treated drinking water.

The PeCOD Analyser does what no other technology has done before. It quickly and safely measures oxygen demand and the associated oxidative changes in organic matter in fresh and treated drinking water, at low concentrations and without the use of hazardous chemicals. A new ASTM International method for PeCOD (photoelectrochemical Oxygen Demand), D8084-17, was released in September 2017.

MANTECH and researchers at the University of Toronto are testing the PeCOD Analyser for drinking water system in a pilot project supported by the Southern Ontario Water Consortium’s (SOWC) Advancing Water Technologies (AWT) program and the Federal Economic Development Agency for Southern Ontario. The 10-month long project that got underway in 2016 is testing the PeCOD method at a water treatment plant in Peterborough, Ont. Read more.

In another project planned for 2017, MANTECH has joined University of Massachusetts researchers examining disinfection by-products found in drinking water systems in New York City, Philadelphia and Portland, Maine.

PeCOD technology has also been a key component of ongoing research at Dalhousie University’s Centre for Water Resources Studies. PeCOD has been used in several research projects to monitor source and treated drinking water in Nova Scotia as well as wastewater in northern communities. Read more.

“The PeCOD has been able to give our group additional insight into drinking water bio-filtration performance by quantifying organic matter removal across bio-filters that was largely unrealized by measuring dissolved organic carbon alone. PeCOD is now being integrated into many of our projects that require a measurement of natural organic matter.” Centre for Water Resources Studies
   
Research and Laboratory
Laboratory staff have known for a long time about the potential negative health impacts and safety dangers of the standard “dichromate method” for COD analysis, even the European Union REACH regulation has banned dichromate effective 2017.  Any level of dichromate, no matter how it is packaged or handled, still represents a danger. PeCOD does not use harmful dichromate for COD analysis. Leading laboratories are converting to PeCOD COD analysis to protect the health and safety of their staff, students and the environment.

PeCOD COD technology is used around the world in a wide variety of settings, including:

  • College laboratories
  • University laboratories
  • Government Enforcement Agencies
  • Government Regulatory Agencies
“Our Annacis Research Centre researchers have remarked that PeCOD produces results very quickly, which allows them to complete research more rapidly. They have also been impressed with the fact that it doesn’t use harmful chemicals, reducing safety risks to researchers and to the environment. They have also found that the PC Titrate equipment is very effective. It gives extremely accurate results, is well designed, and works automatically, saving researcher time. We are thankful to the University of British Columbia and MANTECH for the donated equipment, and look forward to its role in advancing research in the region.” Jeff Carmichael, Director, Annacis Research Centre