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 invention is directed to a gas scrubbing process for removing at least one odorous vaporous compound from a gas stream generated by a rendering process or at least reducing the concentration of that odorous vaporous compound. In one embodiment, a series of two gas/liquid contactors is used, each having a different liquid scrubbing solution, with one scrubbing solution controlled at an alkaline pH and the other scrubbing solution controlled at an acidic pH. In another embodiment, the pH of the respective scrubbing solutions in each of the two gas/liquid contactors is reversed.

An essential oils diffuser with a micro air pump providing between 500 and 1500 Pa of pressure with a consumption of between 0.2 and 1 Watts may be used to push air into essential oils or an essential oil solution to diffuse and expel the oils into the air, while keeping the oils away from the air pump, preventing the oils from shortening the life of the diffuser. The diffuser may include a power supply and a controller to regulate the operation of the diffuser.

A diffusing apparatus for diffusing essential oils into the air includes a reservoir configured to hold essential oils in an internal cavity, and a collar assembly covering the internal cavity. The collar assembly includes a collar exhaust aperture, a collar exhaust channel, and an exhaust port. The collar exhaust aperture is positioned on an opposite side of the exhaust port.

A housing having an inner chamber; one or more channels within the housing; one or more inlet ports for allowing air into the one or more channels; each inlet port having a filter to filter air allowed into the one or more channels; the one or more channels connected so that the same air can flow through all of the one or more channels; a pool of electrolyzed high acidity water in the inner chamber of the housing; and wherein contaminants in air flowing through the one or more channels are configured to fall into the pool of electrolyzed water. The apparatus may further include an ultraviolet light source; wherein the ultraviolet light source is directed at air flowing in the one or more channels to cause contaminants in the air to be killed. A mask may be configured to attach and detach from the one or more channels.

Various methods and systems are provided for flushing a medical gas flow system. In one embodiment, a method for a medical gas flow system comprises: performing a disinfecting cycle of a ventilation gas path comprising a plurality of gas flow passages by: flowing gas from a pressurized gas source of the medical gas flow system to a liquid disinfectant reservoir of a flush module; combining the gas with a liquid disinfectant stored within the liquid disinfectant reservoir to form a disinfectant aerosol; and flowing the disinfectant aerosol through the plurality of gas flow passages.

Proposed is a method of monitoring odor-causing substances in flue gas, which comprises: providing a flue gas containing one or more odor-causing substances; introducing the flue gas into an odor removal unit; producing a gas-phase stream; dissolving a portion of the gas-phase stream in a solvent to produce a liquid-phase stream; and measuring an absorbance of the liquid-phase stream to identify the odor-causing substances.

An apparatus for treating the atmosphere of a storage space for vegetable products with a volume greater than 200 m.sup.3, includes a contacting device having a packing; an injector configured to inject a liquid flow into the contacting device; and a circulator configured to circulate the storage atmosphere in the contacting device. The contacting device is configured such that the storage atmosphere is brought into contact with the liquid flow by circulation in the packing.

The present invention is directed to a gas scrubbing process for removing at least one odorous vaporous compound from a gas stream generated by a rendering process or at least reducing the concentration of that odorous vaporous compound. In one embodiment, a series of two gas/liquid contactors is used, each having a different liquid scrubbing solution, with one scrubbing solution controlled at an alkaline pH and the other scrubbing solution controlled at an acidic pH. In another embodiment, the pH of the respective scrubbing solutions in each of the two gas/liquid contactors is reversed.

Disclosed is a process for treating a stale gas, involving the following steps: circulation of the stale gas in a gas/liquid contactor, called a contactor, and then circulation of the stale gas in a filter unit, called a filter unit, the process involving, in the contactor, placing a circulating liquid in contact with the stale gas, the circulating liquid having a temperature of between 2 and 15 C., preferably between 5 and 10 C., and also to a treatment unit for performing the process including a gas/liquid contactor and a filter unit.