Multi-fiber, fiber optic cable assemblies may be configured so that the terminal ends of the cables have pre-assembled back-post assemblies that include pre-assembled ferrules, such as MPO ferrules that meet the requisite tolerances needed for fiber optic transmissions. To protect the pre-assembled components from damage prior to and during installation, pre-assembled components may be enclosed within a protective housing. The housing with pre-assembled components may be of a size smaller than fully assembled connectors so as to be sized to fit through a conduit. The remaining connector housing components for the multi-fiber connectors may be provided separately and may be configured to be attached to the back-post assembly after installation of the cable.

Various illustrative embodiments of a system and process for recovering high-quality biomethane and carbon dioxide product streams from biogas sources and utilizing or sequestering the product streams are provided. The system and process synergistically yield a biomethane product which meets gas pipeline quality specifications and a carbon dioxide product of a quality and form that allows for its transport and sequestration or utilization and reduction in greenhouse gas emissions. The system and process result in improved access to gas pipelines for products, an improvement in the carbon intensity rating of the methane fuel, and improvements in generation of credits related to reductions in emissions of greenhouse gases.

The present invention relates, inter alia, to the use of porous crystalline solids constituted of a metal-organic framework (MOF) for the selective adsorption of aldehyde volatile organic compounds.

The MOF solids of the present invention can be used for the improved purification of dry or humid air, and for the manufacture of regenerable filters for air purification, particularly leak-free regenerable air filters.

A hazardous gas purification device with a built-in purification system is disclosed. The disclosed present invention is characterized in that it comprises a body case provided with an intake port for sucking hazardous gas on the upper side, provided with an exhaust port for discharging purified air to the outside on the lower side, and provided with an accommodating part provided between the intake port and the exhaust port on the inside; a pre-filter for filtering out large particles of dust and foreign substances contained in the hazardous gas introduced through the intake port; and a modular purification system, in a state of being installed in the accommodating part, for sterilizing viruses while filtering hazardous substances and fine particulate foreign substances contained in the hazardous gas introduced through the intake port, wherein the purification system consists of a three-dimensional filter for three-dimensionally filtering volatile organic compounds contained in the hazardous gas passed through the pre-filter from four directions; a pressure-feed fan, in a state of being disposed below the three-dimensional filter, for sucking hazardous gas through the intake port and forcibly discharging purified air through the exhaust port; a UV lamp disposed below the pressure-feed fan and for irradiating the pressure-feed fan and the hazardous gas with ultraviolet rays to sterilize harmful viruses; a HEPA filter disposed below the UV lamp and for filtering fine particles in the hazardous gas that is not filtered by the pre-filter; and a flat plate filter disposed below the HEPA filter and for filtering the remaining amount of volatile organic compounds that are not filtered by the three-dimensional filter.

An exhaust fan for preventing air pollution includes a main body and at least one gas detection module. The main body is configured to form an airflow-guiding path and includes a gas guider and a filtration and purification component disposed in the airflow-guiding path. The gas guider introduces an air convection for guiding an air pollution source contained in an air to pass through the filtration and purification component so as to filter and purify the air pollution source. The at least one gas detection module is disposed in the airflow-guiding path for detecting the air pollution source and transmitting gas detection data.

An air treatment device includes: a treater configured to capture a toxic substance contained in target air; a regenerator configured to remove the toxic substance from the treater; a detector configured to detect an index correlated with a concentration of the toxic substance contained in room air; and a control unit configured to control the regenerator according to a detection value detected by the detector.

A vacuum cleaner for air pollution prevention includes a main body, a blower, a filtering and cleaning assembly, and a gas detection module. The main body is configured to form a flow-guiding path. The blower is disposed in the flow-guiding path to guide air convection. The filtering and cleaning assembly is disposed in the flow-guiding path to filter and clean the air pollution source in the air guided by the blower. The gas detection module is disposed in the flow-guiding path to detect the air pollution source and transmits a gas detection data.

The invention concerns a method to select the smoke treating unit (3) of a system (1) of a roasting apparatus (2) and an associated smoke treating unit when said system is used in a room (10), said method comprising:—receiving room data input,—receiving roasting use data input in order to determine the quantity of each contaminant produced by the roasting apparatus during a period,—for each system of the roasting apparatus and of one smoke treating units, calculating the concentration of each contaminant present in the room during said period,—for each system and for each contaminant, comparing the calculated concentration of said contaminant present in the room during the period with the concentration of said contaminant authorised according to local health and safety regulations,—selecting the smoke treating unit of the system in the list of smoke treating units providing for each contaminant a calculated concentration inferior to the authorised concentration.

A filter and a method for removing aldehyde-type VOCs from indoor air are disclosed. The filter includes a casing acting as a container. The container comprises two air-permeable opposite walls through which a volume of said indoor air flows and houses one or more natural polyphenols and a catalytic agent. The filter acts as an absorption filter, reacting irreversibly with the aldehyde-type VOCs of the indoor air. The natural polyphenols are powdered polyphenols selected from resveratrol (3,4′,5-trihydroxystilbene), resorcinol (1,3-benzenediol), pyrogallol (1,2,3-benzenetriol), phloroglucinol (1,3,5-benzenetriol) and hydroquinone (1,4-benzenediol), or combinations thereof. The catalytic agent is a solid sulfonic acid. A mixture of the natural polyphenols and said catalytic agent are present, in the container, as compacted block elements. An air-purifying/decontaminating device comprising the filter is also disclosed.

An analysis method and apparatus are disclosed for analysing an absorption filtering medium that filters volatile organic substances in a process gas in a plant for dehumidifying polymer granules, with a fan that generates a flow of gas through the S filtering medium, an analyzer of the total concentration of the organic carbon, a sensor to detect the pressure downstream of the filtering medium, in which the saturation state and/or the absorbent capacity and/or the deterioration over time of the filtering medium is determined by a comparison of the measured concentrations of total organic carbon in the flow of gas upstream and downstream of the filtering medium.