Abstract: A method for reducing or substantially eliminating oxides of nitrogen from an effluent gas stream, that includes providing a source of ultraviolet radiation with a precise wavelength, adding ammonia or an ammonia based reagent to the effluent stream, upstream of the ultraviolet radiation source, controllably operating the ultraviolet radiation source to irradiate the effluent stream flowing in the duct and substantially reducing or eliminating oxides of nitrogen by promotion a reaction of ammonia with the oxides of nitrogen to produce N2 and H2O, and also thereby destroying any surplus ammonia. This process can also be modified to oxidize carbon monoxide and VOC's to CO2 and H2O.

Abstract: A method for reducing or substantially eliminating oxides of nitrogen from an effluent gas stream, that includes providing a source of ultraviolet radiation with a precise wavelength, adding ammonia or an ammonia based reagent to the effluent stream, upstream of the ultraviolet radiation source, controllably operating the ultraviolet radiation source to irradiate the effluent stream flowing in the duct and substantially reducing or eliminating oxides of nitrogen by promotion a reaction of ammonia with the oxides of nitrogen to produce N2 and H2O, and also thereby destroying any surplus ammonia. This process can also be modified to oxidize carbon monoxide and VOC's to CO2 and H2O.

Abstract: A bilge water filter having an elongate tubular housing defining a bilge water outlet and adapted to receive a filter and filter support assembly which is secured in sealed relation therewith by manual retainer elements. The filter and filter support assembly defines an inlet through which is caused to flow bilge water of a marine vessel which may contaminated by oil and other petroleum products. The filter and filter support assembly incorporates an elongate, tubular perforate filter support element about which is positioned and secured a generally cylindrical closed end body of a thick filter media in the form of meltblown polypropylene (polyolefin hydrocarbon). The filter assemblies may be incorporated in valve controlled banks and may be controlled by valve settings to utilize the filters independently, sequentially or together to accomplish separation of oil from the bilge water to thus insure an overboard discharge of oil free bilge water.

Abstract: The method of removing NO and NO.sub.2 from a stream of hydrocarbon combustion products at elevated temperature includes the steps:(a) removing NO from the combustion products in a first zone, and removing NO and NO.sub.2 from the combustion products in a second zone spaced downstream from the first zone,(b) the removal of NO at the first zone being effected by dispersing reagent ammonia or ammonia radical into the stream of combustion products to convert NO into N.sub.2 and H.sub.2 O, and(c) the removal of NO and NO.sub.2 at the second zone being effected by providing a catalyst for contacting the stream, the catalyst effecting conversion of NO and NO.sub.2 to N.sub.2 and H.sub.2 O.A natural draft heater tower is typically employed to contain the two zones.