UASB SYSTEM ANAEROBIC TREATMENT APPARATUS

• Main Author: YODA MOTOYUKI
• Format: Patent
• Language: English
• Published: 30.06.1998
• Edition: 6
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

PROBLEM TO BE SOLVED: To prevent the flotation of granulated sludge and to stabilize high load treatment by adding powdery activated carbon into organic drainage to be introduced into the reaction vessel of an UASB system anaerobic treatment apparatus or the reaction vessel. SOLUTION: A powdery activated carbon addition means is installed, and powdery activated carbon is added continuously and intermittently into organic drainage to be introduced into a reaction vessel or the reaction vessel. The added activated carbon becomes the matrix supply source of bacteria in the sludge to prevent the death and self-decomposition of bacteria. The amount of the added carbon which is changed by the organic substance load of the reaction vessel is preferably 1-5% of a COD cr load in general. The kind of the activated carbon is generally no restricted, and activated carbon from coconut shell, coal, and pitch can be used. The average particle size is preferably 5-100μm. In this way, the flotation and outflow of the granulated activated sludge can be prevented.