A number of applications are based on treatments of food preservation, such as packaging or gasing of vegetables.
For example, gasing of some tuber vegetables (i.g. potatoes) prevents the growth of buds during the stocking period. In some extents, inert gases – which cause asphyxia – can be used, or some waste products produce typical decomposition gases such as methane and hydrogen sulphide.
Grain storage bins and cereal storage areas may produce carbon dioxide. Some fruits may release ethane, carbon dioxide and decomposition materials become dangerous in the nearby areas.
In industrial sausage factories, frozen products are cut by means of nitrogen, therefore they need to be equipped with suitable oxygen detectors to monitor if there are any leaks and safeguard operators' health.
During the production of wines and distillates, the danger of gas comes from the use of substances required for wine preservation, sterilization of tanks or containers, wine fermentation and, finally, stocking of alcohol..
A lot of chemical processes need gas detectors. One of the most common applications is related to the entrance in tanks for cleaning or maintenance. Usually in these circumstances the levels of oxygen, flammable gas vapours (usually solvents are used to clean tanks), and toxic gases need to be kept under control. A factory, for instance a factory that produces Chlorine, must make use of a Chlorine detector.
Chemical systems can produce final products or products which will be used by other factories in different processes..
Different additives, such as sulphuric acid, hydrochloric acid and, sometimes, chlorine, are used during the treatment of pulp. In thermal plants fuel, often methane, is used and there is a great amount of hydrogen sulphide in the treatment of backwaters.
Actually, modern thermal plants have almost stopped using liquid fuels. The fuel most frequently used is methane and, to a smaller extent, liquid petroleum gas (LPG).
Actually, modern industrial kitchens have almost stopped using liquid fuels, but methane or, to a smaller extent, liquid petroleum gas (LPG).
In these systems the danger is linked to the use of chlorine to purify water. There are many different supplying resources: underground, superficial, or brackish water, if properly treated. In most aqueducts water is disinfected. Disinfection always implies the use of chemical substances (except for ultraviolet disinfection). Chlorine derivates are usually used for this purpose.
On these premises, the main activity is the first cause of hazard. In fact, if fuels spill out of their containers, they and their vapours represent a top-grade danger of flammability so that they can be triggered off even by the smallest energy sources (spark).
The big amount of fuel contained in every aircraft make a closed room like and hangar a dangerous place in case of leakage from aircraft tanks.