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Deodorization

Deodorization is the destruction of bad odors resulting from the putrefactive decomposition of organic substrates by microbes (human and animal excreta, food, corpses, etc.).

The formation of foul odors in residential premises, food enterprises, hospitals, etc., indicates a violation of the sanitary rules for maintaining premises, a malfunction of ventilation, and a violation of personal hygiene rules.

The best way to deodorize is to take measures to prevent the appearance of bad odors: keeping the premises clean, timely removing garbage, garbage, human and animal waste products, proper maintenance of the toilet , garbage disposal and waste disposal facilities, proper hygiene. If general sanitary measures do not lead to the disappearance of odor and improvement of air quality, they resort to chemical and physical methods of deodorization.

Rotting substrates in the yard, homesteads are filled with a uniform layer of 10 cm thick dry crushed earth, peat, charcoal or sand. These substances adsorb water and reduce the intensity of decay.

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The following chemicals are used for deodorizing liquid waste: iron sulphate (FeSO 4 ) in the amount of 12–15 g per 1 liter of sewage; copper sulphate (CuSO 4 ) in the form of a 5% aqueous solution in the amount of 7–8 g per 1 liter of sewage; zinc chloride (ZnCl 2 ) in the form of a 5% aqueous solution in an amount of 75-100 g per 1 liter of sewage; bleach with an active chlorine content of at least 25% at the rate of 2–5 kg per 1 ton of sewage. For deodorization of wastewater , 20% calcium-lime milk is used (1 part per 200 parts of wastewater). Formalin is used in morgues (an aqueous 35-40% formaldehyde solution — CH 2 O) in the form of a 0.5-1% solution for wiping walls; to delay the decomposition of corpses in a large vein, as well as in the abdomen, chest, mouth, inject about 2-2.5 liters of a mixture of 2 parts formalin and 1 part denatured alcohol with a syringe .

To deodorize the air in rooms where foodstuffs are stored, use a hot 0.5-1% solution of potassium permanganate with the addition of 0.25-0.5% hydrochloric acid .

To deodorize the air in public spaces and food factories, ozone (03) is added to the supply air, which oxidizes volatile organic substances with a foul odor. Its concentration should not exceed 0.05—0.10 mg per 1 m 3 of indoor air, since large quantities cause toxic effects.

For deodorization of air in public restrooms, fluids of the following composition are used: 1 l alcohol, 15 g fir, 15 g pine, 40 g eucalyptus, 10 g lavender and 10 e of celery oil. A mixture of impregnated sawdust and charge metal boxes - ozonizers. For the deodorization of air in the apartments, “Deodorizing Liquid” is produced, containing isoboric oil, and “Deodorizer” - fused naphthalene tablets.