Case Study



Treatment of Contaminated Aquifer

Ex- situ (Extract -> Treat -> Return) Bioremediation Process

Ex- situ (Extract -> Treat -> Return) Bioremediation Process

Because groundwater is susceptible to various types of contaminants, many of our aquifers have already been polluted. It is necessary to treat the contaminants before they reach active drinking water supply wells. Ex- situ bioremediation systems are the most effective solution to stopping contaminants such as nitrate, perchlorate, selenium, and organics from spreading.

By implementing our BBF system to the source of the contamination and separate points throughout the aquifer, the quality of the groundwater can ensured to meet Federal Maximum Contamination Level (MCL).

Mining Water Bioremediation | Canada

In-house testing OVerview

In July 2015, BKT Co. Ltd began testing the removal rate of nitrate and selenium using coal mining impacted water. Testing operations were monitored using BKT’s in-house pilot BBF unit.


• Evaluate the denitrification performance of the BBF system at different EBCT’s.
• Remove selenium as much as possible from the mining impacted water.


• Nitrate removal was consistent at all EBCT’s averaging around 97% removal.
• Selenium was observed to have a higher removal rate at higher EBCT’s, reaching 73% removal at 120 min. EBCT. 

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Nitrate Removal

Selenium Removal

EBCT Influent
NO3-N (mg/L)
NO3-N (mg/L)
Removal (%)
Se (ug/L)
Se (ug/L)
Removal (%)
60 min 47 1.6 96.6% 420 187.5 55.4%
90 min 50.8 1.7 96.6% 420 190 54.8%
120 min 50.9 1.1 97.8% 420 111.5 73.5%