Abstract: A non-woven textile based filter media is produced from polyester fiber generated using recycled polyethylene terephthalate (PET) beverage bottles, and that non-woven textile based filter media is used to make an air filter. By controlling the diameters and lengths of the PET derived polyester fibers, a non-woven textile based filter media that exhibits a natural Minimum Efficiency Reporting Value (MERV) of about 8 (without requiring electrostatic treatment) and a pressure drop of 2.9 PSI or less can be achieved. A related exemplary embodiment is an air filter fabricated entirely from recycled materials, including a recycled cardboard frame, the non-woven textile based filter media made from recycled PET derived polyester fibers, and a support structure made of recycled plastic or metal wire.

Abstract: A non-woven textile based filter media is produced from polyester fiber generated using recycled polyethylene terephthalate (PET) beverage bottles, and that non-woven textile based filter media is used to make an air filter. By controlling the diameters and lengths of the PET derived polyester fibers, a non-woven textile based filter media that exhibits a natural Minimum Efficiency Reporting Value (MERV) of about 8 (without requiring electrostatic treatment) and a pressure drop of 2.9 PSI or less can be achieved. A related exemplary embodiment is an air filter fabricated entirely from recycled materials, including a recycled cardboard frame, the non-woven textile based filter media made from recycled PET derived polyester fibers, and a support structure made of recycled plastic or metal wire.

Abstract: A multi-layer filter sock is fabricated from materials selected to preferentially remove certain contaminants. For example, a first layer of the filter sock removes relatively fine particulates (such as rust), and another layer removes hydrocarbons. One exemplary hydrocarbon filter material can be made from delustered synthetic fibers. In one exemplary embodiment, the multi-layer filter sock includes an inner pre-filter layer configured to remove relatively larger particulates, another layer configured to remove relatively finer particulates, and a hydrocarbon removing layer. Such a filter sock can be used to remove rust from waste water used to flush fire suppression sprinkler systems, and particulates and hydrocarbons from waste water from underground vaults, enabling such waste water to be discharged directly into the ambient environment.

Abstract: Bacterial discharge from a storm water system is substantially eradicated or at least greatly reduced by providing a filter having a filtration and anti-microbial medium, disposed in sump areas of the storm water system. The medium both removes hydrocarbons and kills bacteria in storm water that is retained in sump areas after a storm event. The filter is disposed in the retained water within the system, rather than being positioned merely as a pass-through filter, thereby increasing the contact time between the anti-microbial agent and the bacteria so that large amounts of bacteria are eradicated, and explosive bacterial growth within the sump areas is precluded prior to such bacteria being flushed from the system during the next storm event. The anti-microbial agent is adhered to, combined with, impregnated in, or otherwise joined to the filtration media. Filtration media that includes delustered synthetic fibers is a very efficient absorbent.

Abstract: An adsorbent hybrid filtration fabric device that comprises a first layer of a loose fiber adsorbent material in the form of a fabric or wadded mass ideally suited for adsorption or filtering of hydrocarbon contaminants comprising a plurality of relatively shorter hydrophobic and lipophilic synthetic fibers, a plurality of relatively longer hydrophobic and lipophilic synthetic fibers, and additional absorption, adsorption, reactive or ionic components, typically in a granular form, wherein the added treatment component is embedded, fused or otherwise adhered to the fabric material, wherein the embedded treatment component is disposed between two layers of fabric material, the second layer of fabric material being identical to the first layer or composed of a synthetic polymer material.