Abstract: A system for capturing and neutralizing HAP's (hazardous air pollutants) and VOC's (volatile organic compounds) at the source point by providing a closed loop remediation system which utilizes an air collection, treatment and control module containing a predetermined size bay of multiple interchangeable mini-biofilter cartridges that function to consume the pollutant and recirculate remediated air back to the source point of the pollutant. The system includes establishing a closed loop air system at a work station which generates and emits VOC's, capturing the VOC's in the air stream flow and transporting them directly into an adjacent biofilter module which contains selected microorganisms in mini-cartridges or in a hopper which biodegrade said VOC's and recirculates remediated air back to the source point of the pollutant.

Abstract: A system for capturing and neutralizing HAP's (hazardous air pollutants) and VOC's (volatile organic compounds) at the source point by providing a closed loop remediation system which utilizes an air collection, treatment and control module containing a predetermined size bay of multiple interchangeable mini-biofilter cartridges that function to consume the pollutant and recirculate remediated air back to the source point of the pollutant. The system includes establishing a closed loop air system at a work station which generates and emits VOC's, capturing the VOC's in the air stream flow and transporting them directly into an adjacent biofilter module which contains selected microorganisms in mini-cartridges which biodegrade said VOC's and recirculates remediated air back to the source point of the pollutant. The cartridges may be contained in modules in single and/or multiple widths and heights and in conjunction with various work stations, cabinets, receptacles, and tables.

Abstract: A latching fluid level switch which includes an elongated shaft member having a lower end and an opposite upper end with both ends containing a buoyant float member. The upper end is pivotally anchored to a tank wall and capable of having its lower end being moved between two distinct angular positions depending on the level of the liquid in said tank acting on said float member and having a first higher buoyancy angular position representing a high liquid level endpoint, and a second less buoyant angular position representing a lower liquid level endpoint. The float is maintained at each distinct angular position such that once triggered at one liquid level endpoint the float will maintain and hold that angular position until reversibly triggered at the other liquid level endpoint.

Abstract: A system for removing H2S from methane (CH4) which includes providing at least one biofilter cartridge that functions to sustain microbial activity which will function to consume H2S contained in a stream of methane gas. A stream of methane gas which contains H2S is transported directly into a biofilter system which contains at least one cartridge containing selected microorganisms which function to biodegrade H2S. Following treatment the methane gas is recirculated to a storage reservoir or a source of use.