Abstract: A system for sanitizing water in a container is disclosed. The system includes a sanitizing chamber, separate from the container, sized to hold a small portion of the water from the container. A first conduit conveys water from the container to the chamber. A second conduit conveys water from the chamber to the container. A pump moves water from the container, through the first conduit into the chamber and from the chamber, through the second conduit into the container. A heater heats the water in the sanitizing chamber to a temperature and for a time sufficient to destroy or deactivate undesirable microorganisms. The first and second conduits each comprise at least one heat exchanger whereby water in the first conduit is heated by the water in the second conduit and water in the second conduit is cooled by water in the first conduit.

Abstract: A device for filtering air for a user comprising a frame formed in a generally oval-shaped band, the band encircling the user's head, with an upper portion above the user's head and a lower portion proximate to and spaced apart from the user's chin, an intake aperture formed in the frame, and an intake air filter covering the intake aperture. The device includes an air mover chamber attached with an air-tight seal to an inside surface of the frame and communicating on one end with the intake air filter and communicating on another end with a filtered air supply inlet inside the device and an air mover disposed within the air mover chamber and configured to draw air through the intake air filter and push air out the filtered air supply inlet. The device also includes an exhaust aperture formed in the frame and an exhaust air filter covering the exhaust aperture.

Abstract: A system for sanitizing water in a hot tub is described. The system includes a sanitizing chamber, separate from the hot tub, and sized to hold a small portion of the water from the hot tub. A first conduit for conveys water from the hot tub to the sanitizing chamber. A second conduit conveys water from the sanitizing chamber to the hot tub. A pump is provided that moves water from the hot tub, through the first conduit into the sanitizing chamber and from the sanitizing chamber, through the second conduit, back into the hot tub. A heater heats the water in the sanitizing chamber to a temperature and for a time sufficient to destroy or deactivate undesirable microorganisms.

Abstract: An air filtering mask is disclosed which includes a rigid component and a flexible component. The rigid component and the flexible component combine to form a space over a user's mouth and nostrils, to form a seal therearound and to maintain the mask in place. The mask also includes an exhaust port with an exhaust filter and an intake port with an intake filter. The mask further includes an air mover pulling exhaust air out the exhaust port, thereby drawing intake air through the intake port.

Abstract: A device for filtering air for a user comprising a rigid component comprising a transparent face shield that provides a space for air between an inside surface of the face shield and the user's face, an intake port, through which air enters the device, an exhaust port, through which air exits the device, a fabric component affixed to the rigid component that, combined with the rigid component, covers the user's head and seals around the user's neck, an intake filter that filters air passing through the intake port, an exhaust filter that filters air passing through the exhaust port, and an air mover held by the rigid component that moves air through the intake port and out the exhaust port.

Abstract: A head covering air filtering device comprising a rigid component comprising a transparent face shield, a fabric component, wherein the rigid component and the fabric component combine to cover an entire head of a user and form a seal around the user's neck. The device further comprises an intake filter to filter all intake air entering the device, an exhaust filter to filter all exhaust air exiting the device, and an air mover causing intake air to enter the device and exhaust air to exit the device.

Abstract: Methods and system for treating blackwater are disclosed. A pyrolysis chamber and a condensing heat exchanger are provided. A blackwater slurry, consisting of blackwater solids, water, and volatiles, is passed into the pyrolysis chamber. The blackwater slurry is heated to produce steam, to separate at least a portion of the volatiles, and pyrolyze the blackwater solids, the separated volatiles passing out of the pyrolysis chamber. The steam and separated volatiles are cooled in a condensing heat exchanger, condensing at least a portion of the steam and at least a portion of the separated volatiles as a contaminated water stream. A water-clarifying chemical is added into the contaminated water stream that reacts with the volatiles, resulting in a treated water stream.

Abstract: A device for filtering air, a rigid component comprising a transparent face shield, a fabric component, wherein the fabric component and the rigid component combine to cover an entire head of a user and form a seal around the user's neck, an intake port, an intake filter that filters intake air passing through the inlet port, an exhaust port, an exhaust filter that filters exhaust air passing through the outlet port, an air mover positioned to pull air through the exhaust port, whereby intake air is drawn into the device through the inlet port and whereby the intake air and exhaust air is filtered.

Abstract: A personal air filtering device for protecting a user from harm, the device comprising a rigid component comprising a transparent face shield, a fabric component, wherein the face shield and fabric combine to cover an entire head of a user and form a seal around the user's neck, an intake port with an inlet filter, an exhaust port with an exhaust filter, an air mover causing filtered air to enter the intake port and exhaust air to exit the exhaust port, one or more sensors, each configured to detect either an environmental condition or a condition of the user, and a processor configured to receive signals from the one or more sensors and execute a protective measure.