Chelant Based Chemical Inhibition of Scale Formation in Shipboard Sanitary Waste Systems

"The objective of this project is to develop an innovative system or product that can be used to alter or otherwise change the character of flushing water (seawater and freshwater) supplied to shipboard urinals and water closets, in gravity flush and vacuumflush systems, to reduce scale build-up in CHT piping. To ensure the ability of ships to discharge sanitary waste overboard is not impacted, the system or product shall not significantly change the character of the sanitary waste effluent dischargedoverboard (i.e. pH and biodegradability) from that of existing ship generated sewage waste. Based upon the findings and success of Phase I, we propose to develop a Sanitary Line Inhibitor (SLI) chemical that will prevent no more than 1/16-inch of scalebuild-up in the CHT piping within a period of six months. We propose to develop a Sanitary Line Cleaner (SLC) chemical that will remove existing scale build-up in the CHT piping within a 45-60 day period. We propose to design and develop an automaticchemical delivery system. Finally, we propose to conduct at sea test and demonstration, commencing with shipboard installation of the chemical delivery system in selected toilets and urinals of an operating Aircraft Carrier"