Technology for adsorbing nutrients using specially formulated pellets to adsorb phosphate, ammonia, and nitrates from the water.
The most recently published EPA assessment of U.S. lakes estimates that around 40% of the country’s lakes and reservoirs are at risk to Cyanobacterial Harmful Algal Blooms (CyanoHABs). As the limiting nutrient in most waterways, increased phosphate (PO43-) concentrations can promote accelerated eutrophication, which has a range of environmental and economic impacts. Eutrophication leads to increased water treatment costs, decreased recreational value; but notably, the proliferation of algal blooms. Some of these blooms produce cyanotoxins like microcystins and cylindrospermopsin which can be detrimental to both human and aquatic health . Though chemical precipitation and biological treatments are commonly used methods for the remediation of PO43-, problems including costs, sludge production, and stability/reliability issues has led to the research of alternative methods for the removal of PO43- from waterways.
The process gaining considerable attention is adsorption. Adsorption is a surface-based phenomena resulting in the adhesion of an adsorbate on the surface of an adsorbent through covalent bonding and electrostatic interactions. Unlike chemical precipitation and biological removal processes, adsorption is unique in that it can remove contaminants over a wide pH range and at low concentrations.