A wastewater treatment tank with influent gates (24) and pre-react zone with an outwardly flared lower portion. Influent passes over influent gates (24), which introduce turbulence, causing aeration, and reducing flow velocity. As influent flows out of the influent gate housing (20), flow velocity is further reduced by contact with the surface of the wastewater in the basin and influent flow is directed laterally by an influent gate bottom (30). A pre-react zone director (34) spaced apart from t...

In a liquid filter device, a tank for receiving filtered liquid has a frame disposed therein and pivotably mounted at one end thereof. Rollers mounted at each end of the frame support a driven conveyor which carries filter media. A head is adapted to discharge fluid onto the filter media. Due to the pivotable mounting, the frame including the conveyor can be moved to an upright position for cleaning the filter device.

Improved swimming pool apparatus includes contiguous, separate pool and secondary water chambers. The secondary chamber receives pool surface water via a skimmer weir regulated by the main pool water level, and via a pool main drain coupling. A cascaded, submersed filter and pump cleans and returns water to the pool. The apparatus need not be winterized and provides water recirculation and cleaning--even in the presence of surface ice; utilizes pump waste heat for water heating; and assures both...

The present invention is directed to an apparatus for heating hot water. The present apparatus utilizes at least two individual hollow conduits that pass through the interior of a hot water tank. Independent inshot gas burners mounted in the conduits pass hot air through the hollow conduits warming the water surrounding the conduits. The conduits are organized in the interior of the tank in such a manner as to create distinct differential temperature zones. Each such temperature zone has an asso...

A wet base boiler of the multi-sectioned type, that is, a boiler in which the fire box is surrounded by water. Each heat exchanger section of the boiler being arranged and constructed to provide an improved heat transfer surface when contacted by the heated gases emanating from the fire box. The heat transfer surface of each section comprises opposing parallel walls having a plurality of equispaced ribs disposed thereon to define a curvilinear path between adjacent ribs, the ribs formed on one w...

Anti-bacterial composite particles which comprise a polymer base material comprising a thermal melting polymer, such as a polyolefine, exhibiting good dispersibility in a basic material resin and having a lower molecular weight or a lower softening point than that of the basic material resin, and inorganic fine particles comprising a metal having anti-bacterial activity carried thereon. An antibacterial resin composition can be prepared by melting and kneading a synthetic resin composition as th...

The present inventions provide a floating type decanter apparatus that controls the decanting operation through the use of air.

A boiler which is primarily designed for the central heating of apartments has two separable elements constituted by the boiler furnace and a heat exchanger. The heat exchanger of single-unit construction surmounts a completely open section of the boiler furnace and carries a gas or fuel-oil burner, the flame of which is directed away from the internal surface of the heat exchanger and follows a curved path within the combustion chamber. Except for the open section which carries the exchanger, t...

The present inventions provide a floating type decanter apparatus that controls the decanting operation through the use of air.

A fluid pollution prevention system for preventing the discharge of hazardous waste from a bilge of a marine vessel. The system includes an continuous sidewall that defines a vertically enclosed volume. When positioned within a bilge, the sidewall forms a barrier to petrochemicals floating on a fluid surface within the bilge. An opening near a base of the sidewall permits fluid from beneath the fluid surface to enter the vertically enclosed volume. Such fluid is substantially free of petrochemic...