WATER TREATMENT METHOD AND WATER TREATMENT DEVICE

摘要

Provided are a water treatment method and a water treatment device, whereby it becomes possible to treat water with high efficiency and in a safe manner when considered in the whole of the device. A water treatment method comprising: mixing organic waste water that is raw water with excess sludge obtained by a biological treatment for a hydraulic retention time of 10 minutes or shorter; subjecting the mixed solution of the organic waste water and the excess sludge to solid/liquid separation to produce a separated solution and separated sludge; converting the separated sludge into the form of a fuel; subjecting the separated solution to a biological treatment; and returning sludge formed by the biological treatment as excess sludge.