Our Challenge

Management at the North Hutchinson Island wastewater treatment plant was looking to implement a proactive air quality control program to react to the H2S and ammonia that was coming from the plant. With increasing rural development creeping closer to the plant, management wanted to ensure that any odor problems were taken care of before the public started moving into the new developments. The systems needed to be able to not only handle their daily flow but was required to be easily expandable if needed. Specifications included that the selected vendor guarantee “no odor” performance, to be based on testing they would perform.

Our Solution

We installed eight Pentack biofilters that each consist of five patented biofiltration media trays which are stacked into a compact design. This three stage modular biofilter is designed to remove hydrogen sulfide, the primary odor-causing compound. We also procured an ammonia stripper and carbon drum to provide additional protection from other odor sources. The biofilters are rated at 150 cfm each, to remove up to 500 ppm of hydrogen sulfide at an efficiency of 99%.

Our Success

After winning the bid with our test results, ability to expand if needed, easy setup and operation and negligible maintenance requirements, the Pentpack system has been successfully removing H2S at a 99% removal rate since its commissioning in September 2003.