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 ...

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 ...