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ALBERTA

Background

In August of 2012, Gary contacted WCS looking for more information on the Bio-Domes as a potential solution for their wastewater lagoons. The Coaldale lagoons currently have diffused aeration in place but it is at the end of its useful life and needs to be replaced. Additionally Coaldale is anticipating the need for additional treatment capabilities to provide year round nitrification as that has become a bigger issue at the Federal level within Canada. In an effort to proactively address their anticipated needs, Coaldale commissioned a 12 month pilot study on site to determine the effectiveness of the Bio-Domes as a possible solution for their system.

Solution & Results

WCS delivered the pilot unit to Coaldale on June, 19 2013 during the wettest week of the year. The pilot unit will run continuously at a one (1) day retention time for the next 12 months, with weekly sampling, to provide Coaldale and WCS a robust data set regarding the ability of the Bio-Domes to address BOD, TSS and Ammonia.

Background

WCS made first contact with representatives of the Calgary Airport Authority (YYC) in January of 2011. The airport is currently looking for a solution for the glycol deicing runoff that makes its way into their storm water storage ponds. If the concentrations get too high, YYC can experience odor problems, and if they have to send their water to the city for treatment, they can incur substantial surcharges. Having never tested the Bio-Domes in such an application, WCS was eager to work with YYC to run a pilot test on the ability of the Bio-Domes to breakdown the ethylene glycol.

Solution & Results

After lots of planning, a Mobile Pilot unit was delivered to YYC on October 17, 2012. Elevated glycol levels were detected in May of 2013, at which point the influent to the pilot unit had a glycol and BOD concentration of 112 mg/L and 107 mg/L respectively. The effluent concentrations were below the detection limits of 10 mg/L and 2 mg/L respectively. WCS then worked with YYC to run a series of batch reactions where the pilot unit was spiked with ever increasing concentrations of Glycol. The last test, begun May 30, showed a complete biological breakdown of the ethylene glycol from 3400 mg/L to 16 mg/L in 14 days. During this same period the BOD levels rose and the glycol was broken down but showed signs of beginning to diminish during the last sample taken before the pilot unit had to be shut down. Subsequent batch runs were performed at the WCS facility in Lehi, UT. Results are shown below.

 

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