Volatile fatty acids are common organic substances in waste water, and due to their volatile, they are easy to cause harm to the human body through breathing or contact. Common volatile fatty acids include acetic acid, propionic acid, butyric acid, valeric acid, etc., which often exist in the form of mixtures in waste water.
Acetic acid is one of the most common volatile fatty acids in waste water, which has a strong pungent odor and is easily absorbed by the human body and causes irritation of the eyes, eyes and respiratory tract. Acetic acid is often used as a nutrient for microorganisms in wastewater treatment, but excess acetic acid can also inhibit the growth of microorganisms.
Propionic acid is another common volatile fatty acid that has an unpleasant odor that can cause itching and respiratory irritation. Propionic acid can be degraded by microorganisms during wastewater treatment, but high concentrations of propionic acid can also have an inhibitory effect on microorganisms.
Butyric acid is a volatile fatty acid with a strong odor that can cause **irritation and respiratory irritation. Butyric acid can be used as an energy substance for microorganisms in wastewater treatment, but excess butyric acid can also inhibit the growth of microorganisms.
Valeric acid is a volatile fatty acid with a low concentration that has an unpleasant odor and can cause eye and respiratory irritation. Valeric acid can be degraded by microorganisms in the wastewater treatment process, but its inhibitory effect on microorganisms is weak.
In addition to the above common volatile fatty acids, there are some other types of volatile fatty acids, such as caproic acid, enanthate, etc. The content of these substances is low in waste water, but the harm to the human body cannot be ignored.
In conclusion, understanding the common types of volatile fatty acids in waste water is of great significance for environmental protection and sewage treatment. In practical application, the treatment and monitoring of wastewater should be strengthened, the content of volatile fatty acids should be reduced, and the environment and human health should be protected.