Method and apparatus for filtration with plural ultraviolet treatment stages

XIV

New Patents

and completely combusted in a main combustor at a condition at which appreciable quantities of thermal NOx are not formed to generate an effluent gas stream, thereby generating an effluent gas stream containing decreased amounts of thermal and prompt NOx. A system for combusting a hydrocarbon fuel includes, in combination, means for mixing the fuel with a first air stream, a catalytic oxidation stage containing an oxidation catalyst, means for mixing the partial oxidation product stream with a second air stream, and a main combustor capable of completely combusting the partial oxidation product stream.

5236133 METHOD

OF CONTAINER REMOVAL

LABEL

Lynn C Lundquist This method is an improvement of an existing apparatus and method employed to remove paper or plastic film labels from plastic blow molded bottle scrap. Mechanical improvements have been made in two areas. The first area of improvement consists of the addition of multiple stages to the vertically mounted rotating blade assembly and cooperating multiple stationary elements within the stator assembly. The second area of improvement is within the air induction system and consists of improvements of the flow and control of the air stream which entrains the waste from the process mass. The method improvement of this invention results from the employment of these mechanical advancements.

5236595 METHOD AND APPARATUS FOR FILTRATION WITH PLURAL ULTRAVIOLET TREATMENT STAGES Lawrence Wang, Lubomy Kurylko, Mu H S Wang assigned to International Environmental Systems Inc USA An improved filtration system involving the use of ultraviolet irradiation, ozonation, chlorination, reactive filtration media, chemical treatment, compressed air aeration, air emission

control, and central flow control is described. The process system and apparatus of the present invention mainly include a liquid pump, an ultraviolet pretreatment means, a central flow control, an air emission control means, a reactive pressure filter, a process tank, at least one chemical feeder means, an ultraviolet post-treatment means, and an aeration means. The filter media are of reactive type, including diatomaceous earth, granular activated carbon, fibrous activated carbon, granular metal medium, greensand, neutralizing sand, silica sand, activated alumina, ion exchange resins, polymeric adsorbents, chemical treated adsorbents, manganese oxide, coal, porous plastic medium, porous stainless steel medium, porous ceramic medium, bacteriostatic filter medium, porous paper filter medium, porous carbon filter medium, coalescing filter medium, fiberglass filter medium, or combinations thereof. The process tank contains and handles regenerating chemicals, flocculating chemicals, filter aids, or recirculating water. The reactive filter media of this invention are regenerated by either chemical reactions or aeration for reuse to prolong the filter media's service life and to reduce the operation and maintenance costs. Said air emission control means is provided when compressed air aeration is applied to said pressure filter for regeneration of said reactive filter media. The apparatus of this invention is compact and simple, and can cost-effectively remove suspended, dissolved, volatile, radioactive and living contaminants from a contaminated liquid.

5236672 CORONA DESTRUCTION OF VOLATILE ORGANIC COMPOUNDS AND TOXICS Carlos M Nunez, Geddes H Ramsey, Wade Ponder, James H Abbott assigned to The United States of America as represented by the United States Environmental Protection Agency Apparatus and method for controlling volatile organic compounds and air toxics in a contaminated fluid flow through use of an excited species flow generated and introduced into the contaminated fluid flow to convert the contaminants into non-toxic compounds. Tungsten electrodes and an alternating current are used in the excited species generator.