A Natural Process
At the core of Frontier Water Systems’ innovative water treatment solutions is a novel biological treatment process. The patented SeHAWK® process harnesses the power of naturally occurring bacteria grown in an engineered bioreactor to remove contaminants such as nitrate, selenium, and heavy metals from water. Frontier complements the biological treatment process with state of the art membrane filtration technology. This technological combination helps customers achieve a high quality, clean discharge stream that is suitable for reentry to our nation’s waterways.
THE SeHAWK® process
The patented SeHAWK® process combines a first stage upflow bioreactor with a second stage downflow bioreactor creating a compact, packaged solution. The bioreactors contain specialized, naturally occurring microbial biofilms which facilitate the removal of contaminants.
The microorganisms are fed BioElix® nutrient, which fuels the SeHAWK® process. Within the process, Selenium and heavy metals are transformed into a safe, disposable, solid product while nitrate is converted to nitrogen gas and efficiently released in the upflow first stage.
Big Results in a Small Footprint
Prefabricated Approach to Bioreactor Equipment
Traditional biofilters entrain gas, resulting in increased equipment size. The SeHAWK® process addresses this with the integration of an expanded bed and a packed bed bioreactor into one process, which significantly decreases the equipment footprint. This smaller footprint enables Frontier Water to take a modular, prefabricated approach to bioreactor design, providing treatment flexibility, lower costs, and faster project timelines.
Applying Membranes for Enhanced Water Quality
To produce the highest quality water in the most efficient equipment package, Frontier integrates biological treatment with ultrafiltration and reverse osmosis membranes.
Frontier applies ultrafiltration membrane technology in situations where low-level contaminant removal is required to polish any particles exiting the bioreactor. Tiny, hollow membrane fiber bundles employ an outside in filtration path to remove particles in water streams down to 0.01 microns. The membrane pore size is so small that all suspended solids, bacteria, or viruses are removed from the water stream.
Frontier Water systems continues to innovate through the application of reverse osmosis (RO) to preconcentrate contaminants into a low volume stream for treatment, thus further reducing the bioreactor equipment footprint. RO consists of a semipermeable membrane which filters nearly all contaminants and minerals out of the water, concentrating them into a low volume brine stream. This brine stream flows through the SeHAWK® bioreactor to eliminate contaminants and is then recombined with the RO permeate stream, resulting in overall contaminant removal to ultra-low levels.