Johkasou – Wastewater Management in a Local Municipality in Japan

Publication | October 2021

Johkasou treatment systems are expected to fulfill Japan’s demand for wastewater management in non-sewer areas in the era of population decline.

Johkasou is a decentralized wastewater treatment system that treats human waste from flush toilets and domestic wastewater from kitchens, baths, and others. In Japan’s urban areas, public sewerage systems are used for collective wastewater treatment; but in urbanization control areas, loose regulation areas, and other areas with low population density, Johkasou can be a more economical decentralized wastewater treatment system.

Johkasou technology can treat both black water and gray water and has been attracting attention because it provides equal treatment at a fraction of the cost of the sewerage system. The Johkasou system is expected to fill Japan’s wastewater management demand in non-sewer areas as well as meet the need for wastewater management measures in the era of population decrease.

DEVELOPMENT CASE STUDY NO: 2021-4

Additional Details

Authors
Type
Series
Subjects
  • Environment
  • Health
  • Water
Countries
  • Japan