Installation Examples

Food producer in Takehara, Hiroshima

Promoting environmental protection for the sea and rivers

The Total Amount Water Quality Regulation System was enforced in 1978 in order to reduce water pollution in closed areas such as the sea and rivers caused by the concentration of population and industries. It regulates the total amount of COD wastewater (concentration x discharge flow rate) at factories and sewage treatment plants that discharge certain amount of wastewater to closed water areas (Tokyo Bay, Ise Bay and the Seto Island Sea) and rivers that flow into the closed water areas. Factories that discharge a large amount of wastewater are also required to install equipment to measure and monitor COD which is subject to the regulation.
In 2002, total nitrogen and total phosphorus were added to the subject items and are now regulated same as COD.
DKK-TOA have provided instruments to measure and monitor those subject items since the introduction of the regulation and achieved many delivery records.