Having outlasted its intended lifespan, Bunker Hill's (IL) collection and treatment system required updating to meet more stringent effluent requirements.
ADS recommended that Bunker Hill add an earthen berm to the existing primary lagoon to create two cells, one for storage and one for aeration. Fine-bubble aeration was added to three treatment lagoons and at the bottom of the rock filter.
When properly designed and implemented, media filters offer reliable year-round mitigation of nutrients including ammonia. The ADS aerated rock filter is a way to reduce nitrogenous compounds to below-permitted levels.
The system is designed for ease of maintenance, as the diffusers can be easily accessed and serviced within the rock. The aerated facultative lagoon systems and rock filters are designed for a 20-year service life when properly maintained.
With communities across the country looking to meet minimal discharge concentrations without the expensive conversion to activated sludge, the ADS aerated lagoon is a viable option.