Abstract: A system for treating ballast water includes one or more electrolytic cells in fluid communication with a salt water source and in fluid communication with one or more ballast water tanks, a means for controlling hypochlorite generation by the one or more electrolytic cells, and a neutralization system in fluid communication with the one or more ballast water tanks. The neutralization system includes a means for measuring presence of oxidizing agents in the ballast water, a reducing agent source in fluid communication with the ballast water, and a means for controlling the amount of reducing agent supplied to the ballast water in communication with the means for measuring presence of oxidizing agents in the ballast water. The system may include a flow meter for measuring a ballast water flow rate and/or a TOC analyzer for measuring a TOC content of the ballast water.

Abstract: A system and process for treating ballast water within an ocean going vessel by generating hypochlorite for treating the ballast water. The system comprises one or more hypochlorite electrolytic cells in fluid communication with ballast water. The total organic carbon content of the ballast water is ascertained and the amount of hypochlorite generated is modulated in response to the total organic carbon content of the ballast water. In one embodiment the system comprises a total organic carbon analyzer for measuring total organic carbon content. In one embodiment of the process of the invention, hypochlorite production is modulated so that the residual halogen-containing oxidizing agent is maintained in the ballast water. In another embodiment of the process, hypochlorite production is modulated to maintain a weight ratio of hypochlorite to total organic carbon in the ballast water ranging from about 1.0 to about 3.0.

Abstract: A system and process for de-halogenating ballast water before releasing the ballast water from the vessel. In one embodiment, the system comprises a means for measuring the halogen content of the ballast water, a reducing agent source in fluid communication with the ballast water, and a means for controlling the amount of reducing agent supplied to the ballast water. In one aspect, the means for measuring the halogen content comprises one or more oxidation/reduction potential analyzers. In another embodiment, the system comprises one or more hypochlorite electrolytic cells for generating hypochlorite to treat the ballast water. One embodiment of the process for de-halogenating ballast water comprises measuring the oxidation/reduction potential of the ballast water and adding one or more reducing agents to the ballast water to de-halogenate the ballast water in response to the measured oxidation/reduction potential.

Abstract: A method for managing ballast tank circulation system comprising a means for adding one or more halogens in controlled amounts to the water within the ballast tank. Test streams of water from the ballast tank can be analyzed to determine the level of halogens in the test stream to provide a halogen content signal. A controller receives the signal and compares the signal to a set point indicative of the level of halogen desired within the ballast tank to maintain, increase, or decrease the amount of chemical added to the water within the ballast tank in controlled amounts.