How much can synthetic detergents be treated at a sewage treatment plant?

Currently, household synthetic detergents often use anionic surfactants and nonionic surfactants are used in synthetic detergents.

According to the measurement results at the Yokohama City Water Reclamation Center, the concentration of anion surfactant in 2001 was 2.1 mg per liter for inflow sewage and undetected (less than 0.03 mg) in effluent, and the removal rate was 98% or more.

Regarding non-ionic surfactants, according to the 2000 survey results, the average inflow sewage was 2.9 mg per liter and 0.028 mg for effluent, and the removal rate was 99%.

As for synthetic detergents, hard type ABS (branch chain-type alkylbenzenesulfonic acid salt) was used to have problems such as pollution of rivers and lakes and foaming at water reclamation centers. Today, the alkyl groups are replaced with straight chain and good degradable LASs, and many other positive types of axion and non-field decompositive types. For this reason, most of the detergent usage is considered to be removed at the water reclamation center.

Regarding the use of detergent, please use it in an appropriate amount.