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Biochemical Process Helps Manufacturer Meet Wastewater Standards
Case Study
A U.S.-based manufacturer faced a significant compliance challenge when new permit regulations capped nitrate discharge at 3.13 lbs/day. Their existing treatment system, designed for heavy metals, performed well but could not effectively reduce nitrate levels, which historically ranged from 4.64 to 6.85 lbs/day. Replacing equipment wasn’t feasible due to cost and timing, so they turned to Hubbard-Hall for a solution.
Hubbard-Hall’s technical team identified environmental barriers—pH instability, low dissolved oxygen, and heavy metal toxicity—and designed a biochemical treatment plan using the existing equalization tank. The solution included pH adjustments, aeration, and a proprietary bacterial blend, BCT-BAS, which thrives in high-COD wastewater environments.
Within one week, nitrate levels dropped to 2.08 lbs/day, meeting compliance. Continued optimization further reduced discharge while minimizing chemical use, all without disrupting metal removal operations.
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BCT-BAS bacterial blend for nitrate reduction
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pH control and aeration to support biological activity
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Dosing protocol that balanced bacteria growth and metal toxicity
Download the full case study to see how Hubbard-Hall helped a manufacturer achieve compliance in just seven days.