WaterTectonics designed, built, and installed a 1000gpm pH adjustment system for this Oregon, USA soda ash terminal. Soda ash (also know as sodium carbonate) raises pH when it comes into contact with stormwater. In order to lower the pH back down, acid needs to be injected into the water. The client was concerned with the health and safety risks of handling higher strength liquid acids, so an automated pH adjustment system utilizing carbon dioxide gas and bubbler hose assemblies was selected. The system included real-time water quality readings from pH probes. These readings controlled actuated valves that only allowed discharge of water within the defined compliance range.
*Photo curtsey of the Port of Portland
