Abstract: A low head oxygenator system includes one or more chambers, each of the one or more chambers having an open top and one or more distribution plates, each distribution plate disposed over the open top of a corresponding one of the one or more chambers. Each of the one or more distribution plates has a predetermined number of orifices uniformly distributed within one or more zones of the respective distribution plate and no orifices in at least one remaining zone of the respective distribution plate. The oxygenator system further includes a container, disposed on top of the one or more distribution plates, and configured to allow a liquid contained in the container to flow through the orifices of the one or more distribution plates into the one or more chambers. Further, use of the distribution plate frees up the head-space region for a scrubbing insert configured to perform stripping.

Abstract: A low head oxygenator system includes one or more chambers, each of the one or more chambers having an open top, and one or more distribution plates, each distribution plate disposed over the open top of a corresponding one of the one or more chambers. Each of the one or more distribution plates has a predetermined number of orifices distributed within one or more zones of the respective distribution plate and no orifices in at least one remaining zone of the respective distribution plate. The oxygenator system further includes a container (e.g. trough), disposed on top of the one or more distribution plates, and configured to allow a liquid contained in the container to flow through the orifices of the one or more distribution plates into the one or more chambers.

Abstract: A low head oxygenator system includes one or more chambers, each of the one or more chambers having an open top, and one or more distribution plates, each distribution plate disposed over the open top of a corresponding one of the one or more chambers. Each of the one or more distribution plates has a predetermined number of orifices distributed within one or more zones of the respective distribution plate and no orifices in at least one remaining zone of the respective distribution plate. The oxygenator system further includes a container (e.g. trough), disposed on top of the one or more distribution plates, and configured to allow a liquid contained in the container to flow through the orifices of the one or more distribution plates into the one or more chambers.

Abstract: A low head oxygenator system includes one or more chambers, each of the one or more chambers having an open top, and one or more distribution plates, each distribution plate disposed over the open top of a corresponding one of the one or more chambers. Each of the one or more distribution plates has a predetermined number of orifices distributed within one or more zones of the respective distribution plate and no orifices in at least one remaining zone of the respective distribution plate. The oxygenator system further includes a container (e.g. trough), disposed on top of the one or more distribution plates, and configured to allow a liquid contained in the container to flow through the orifices of the one or more distribution plates into the one or more chambers.

Abstract: A low head oxygenator system includes one or more chambers, each of the one or more chambers having an open top and one or more distribution plates, each distribution plate disposed over the open top of a corresponding one of the one or more chambers. Each of the one or more distribution plates has a predetermined number of orifices uniformly distributed within one or more zones of the respective distribution plate and no orifices in at least one remaining zone of the respective distribution plate. The oxygenator system further includes a container, disposed on top of the one or more distribution plates, and configured to allow a liquid contained in the container to flow through the orifices of the one or more distribution plates into the one or more chambers. Further, use of the distribution plate frees up the head-space region for a scrubbing insert configured to perform stripping.

Abstract: A portable apparatus and process for treating and mixing ballast water. The apparatus is a lightweight, easily transportable air sparger that serves as a backup treatment system in the event of failure of a Ballast Water Maintenance System or in an emergency or when an unregulated vessel arrives in port with a filled tank. The sparger is operated with compressed air passing through arms and hoses extending from a central hub. Fluids exiting arms produce streams at various levels circulating and mixing ballast water, minimizing energy consumption.

Abstract: The invention is an immersion system for decontamination of ship outer surfaces while a ship is located in a lock structure. The lock structure is modified with an inflatable bladder and shortened containment gates. When the ship enters or exits the lock structure, the inflatable bladder is deflated before opening the containment gates. When the inflatable bladder is deflated, a lower treated fluid layer sinks and water adjacent to the lock structure enters the lock through wall ports to create an upper fluid layer on which the ship enters. When the ship is located in the lock structure and the containment gates are closed, the inflatable bladder is inflated. When the inflatable bladder is inflated, the lower treated fluid layer rises and surrounds the ship surface to kill invasive aquatic species.

Abstract: An airlift, water mixing system that passes biocides, algaecides and gas through a ship's ballast water tanks and its pipping to control water PH. Vertically moving diffusion grids provide air sparging in treated ballast water that accommodates variances in ballast water levels without changes in pressure or power used by an air compressor connected to a diffusion grid.

Abstract: The invention is an immersion system for decontamination of ship outer surfaces while a ship is located in a lock structure. The lock structure is modified with an inflatable bladder and shortened containment gates. When the ship enters or exits the lock structure, the inflatable bladder is deflated before opening the containment gates. When the inflatable bladder is deflated, a lower treated fluid layer sinks and water adjacent to the lock structure enters the lock through wall ports to create an upper fluid layer on which the ship enters. When the ship is located in the lock structure and the containment gates are closed, the inflatable bladder is inflated. When the inflatable bladder is inflated, the lower treated fluid layer rises and surrounds the ship surface to kill invasive aquatic species.

Abstract: A method of killing aquatic species in water includes containing the water with the aquatic species therein within a conduit; pressurizing the water; and transferring gas to the water to thereby supersaturate the water with dissolved gas such that &Dgr;P is greater than zero.

Abstract: A hydropower conversion system is provided which uses a hydraulic gradient to accelerate water in a drive pipe. A valve is disposed in the drive pipe to interrupt the flow of water and thus create a temporary negative pressure within the drive pipe. A negative pressure relief device with a riser section is coupled to the drive pipe and is adapted to pull air but not water into the riser section when under negative pressure. A pneumatic device such as a power turbine is coupled to the negative pressure relief device.

Abstract: A hydropower conversion system is provided which uses a hydraulic gradient to accelerate water in a drive pipe. A valve is disposed in drive pipe to interrupt the flow of water and thus create a temporary negative pressure within the drive pipe. A negative pressure relief device with a riser section is coupled to the drive pipe and is adapted to pull air but not water into the riser section when under negative pressure. A pneumatic device such as a power turbine is coupled to the negative pressure relief device.