There is disclosed a system and process for purifying air. The system includes a housing and a plurality of inner and outer chambers. A solution of water and a biological reagent is configured to flow around the inner and outer walls of the inner and outer chambers while air is passed adjacent to this fluid flow. This causes an interaction between the air and the fluid solution to cleanse the air. The air is then discharged from the chamber.

The present disclosure provides an air control cabinet (ACC) module for a clean room system. The clean room system has a clean fab and a clean sub-fab. The clean fab of the clean room system is configured to be disposed with at least one wafer processing apparatus. The ACC module includes an ACC inlet tube, a main cabinet, and an ACC pipeline. The ACC inlet tube is configured to supply air from the clean fab of the clean room system to the ACC module. The main cabinet is connected to the ACC inlet tube and configured to generate clean air from the air supplied from the ACC inlet tube. The ACC pipeline is connected to the main cabinet and configured to supply the clean air generated by the main cabinet to the wafer processing apparatus in the clean fab of the clean room system.

A decontamination appliance includes a control cabinet having a control circuit and a decontamination cabinet. The appliance also includes an ozone generator that supplies ozone to the decontamination cabinet. The ozone generator is controlled by the control circuit. A hydrogen peroxide vaporizer is also controlled by the control circuit. A circulation fan circulates a stream of air through the decontamination cabinet. The circulation fan circulates ozone generated from the ozone generator and hydrogen peroxide paper generated from the hydrogen peroxide vaporizer. The decontamination cabinet further has includes trays mounted on a tray rack, and the appliance is mounted on wheels for portable use. The decontamination appliance also preferably includes a humidifier.

A cultivation system and method. Conditioned airflow is directed downwardly and in crosswise opposition into a sealed cultivation chamber. The conditioned airflow passes through plants in the chamber, strengthening the plants, transferring heat, humidity and CO.sub.2, and scrubbing the plants of infectious particles, resulting in spent airflow. The spent airflow is recovered from the chamber below where the conditioned airflow was introduced. The spent airflow is conditioned and reintroduced to the chamber as conditioned airflow. A volume of the conditioned airflow directed into the chamber is substantially equal to a volume of the spent airflow received from the chamber, and a volume of the spent airflow in the system between receiving the airflow and conditioning the airflow is substantially equal to a volume of the conditioned airflow in the system between conditioning the airflow and directing the airflow, for maintaining consistent airflow within the chamber.

COVID-19 is a large virus with remarkable resilience, propagation and multiplication features that require complex technologic systems and manners to assure a reasonable protection. A transparent, multiuse face mask with valves and for inhalation of air from a specialized filter placed in a cleaner air space, and an exhalation valve that drives the exhaled air via a tube to a filter bladder placed on wrist and from there to a tube that has the release end near ground, or can be connected to the aspiration tube of the infrastructure, that removes it, preventing recirculation. The general convention that defines the usage method is that the building, buss, and any other enclosure provide clean antiseptic air above and consumer s have to release their exhalations down near floor from where the structure to remove them by a controlled air flow similar to clean rooms.

The main condition is that people to place their exhalation exhaust sterilized and placed near ground in order to increase the probability to inhale clean sterile air at the head level. No filter is perfect, and no sterilization unit, therefore the enclosure has to deal with exhaust gas, and remove into the atmosphere safely. The work to keep people inside safe is done by both the enclosure that may provide vacuum lines to collect the exhaled air, and by the people who will use correctly the infrastructure. The system is designed for smart communities for everybody to wear for about 3 weeks when a covid-19 or other virus infection occurs to suppress its multiplication rate, without perturbation in their activity and then returning to normality.

In some embodiments, there is provided a scrubber system for cleaning return air in an HVAC unit, where the scrubber system attaches directly to an inlet of the return-air side of the HVAC unit, for example, by the mating of a flange on the system with a matching flange on the HVAC unit. The bolt-on scrubber system may comprise one or more sorbent materials, a fan for circulating return air through the sorbent, a damper-controlled inlet and a damper-controlled outlet to the attached return air side of the HVAC unit. Further, an additional air flow channel and a damper may be included in the system to control the flow of outside air into the HVAC unit. In some embodiments, the sorbents may be contained in removable inserts.

A fluid-flow contaminant indicator includes a container having a fluid-flow path having an upstream region and a downstream region. A colorimetric indicator, disposed in the fluid-flow path, has a surface adapted to change color when exposed to a contaminant of interest. The colorimetric indicator has at least one hole passing there through such that the fluid-flow path extends through the hole(s) in the colorimetric indicator. A fluid-impervious mask is adhered to all of the colorimetric indicator's surface except for a region of the surface that is adjacent to the hole(s) in the colorimetric indicator wherein this region is exposed to the upstream region of the fluid-flow path.

Presented is a device (100) for filtering air, comprising: an air filter (101) comprising: a first component (102) adapted for filtering air having a humidity level falling within a first humidity level range; and a second component (103) adapted for filtering air having a humidity level falling within a second humidity level range; a control system (106) configured for: receiving a sensed relative humidity of air, and selecting the first (102) or the second (103) component for filtering the air, depending on the sensed relative humidity of the air.

An air purification device includes a driving part for changing a location thereof, a fan, a carbon dioxide absorption filter for absorbing carbon dioxide in the air, a filter reproduction part for removing carbon dioxide absorbed into the carbon dioxide absorption filter, and a processor configured to control the driving part such that the air conditioning device moves to an area that can support ventilation, and drive the filter reproduction part for removing carbon dioxide absorbed into the carbon dioxide absorption filter in the area that can support ventilation.

Polymeric beads useful for aldehyde abatement, a process for preparing the polymeric beads, a gas filter device comprising the polymeric beads, and a method of removing aldehydes from air by contacting the air with the polymeric beads.