Solid-liquid separation integrated biological treatment method and biological treatment apparatus

摘要

PURPOSE:To decrease the setting area of equipment, to reduce the time required for treatment and to make the process more efficient by biologically treating org. sewage and separating solid from the treated liq. at the same time and place. CONSTITUTION:A porous filter 9 with the pore diameter controlled to 10-450mum, the thickness to 5-40mm and the porosity to =30% is arranged in a tank 2 for treating org. sewage in the presence of sludge. The sewage is passed through the filter 9, the treated water is discharged, and hence the biological treatment and filtration are performed in the same tank 2.