Lawton Water Treatment Plant
Lawton, IA | public works
ISG designed a water treatment plant that could remove iron and manganese from water, which had been an issue for the community of Lawton.
The City of Lawton previously pumped directly to their water distribution system with only chemical treatment. Higher iron and manganese levels caused red/black water which was not able to be sequestered using polyphosphates.
An iron and manganese removal water treatment plant was designed using a factory built unitized aeration-detention-filtration treatment system. The new plant and wells were constructed on the opposite side of Lawton as the original wells. The unitized treatment tank is constructed of stainless steel to avoid future corrosion that is a known problem with steel tanks. The treatment building was designed using a concrete filled insulated plastic forming system that stays in place providing a maintenance free building both inside and out.
The treatment plant removes iron and manganese to below secondary maximum contaminant level (MCL) limits. The new plant includes automatic controls including variable frequency drive controls for the wells and soft start motor controls for the high service pumps. High efficiency motors were used for all pumps to conserve energy.