System and method for treating wastewater by applying activated sludge

• Main Authors: DUAN DONGYAN, ZHAN SHENMING, XU XUEXIANG, CHEN FENG
• Format: Patent
• Language: English
• Published: 23.12.2015
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to the technical field of sewage treatment and discloses a system for treating wastewater by applying activated sludge. The system comprises a feed hopper (1), a homogenizing tank (2), a biogas tank (3), an up-flow anaerobic sludge bed (4), an activated sludge reaction tank (5), a microelectrolysis reactor (10), a baffled biological aerated filter (BBAF) (6) and an ozone disinfection tank (7), which are connected in sequence, wherein the biogas tank is connected with a sludge thickening tank (8). The invention also discloses a method for treating wastewater by applying activated sludge. The method comprises anaerobic digestion treatment, treatment by adopting an activated sludge method, microelectrolysis reaction, biochemical treatment with the BBAF and ozone disinfection. The system and the method have the beneficial effects that the process is simple; the concentration gradient in the reaction process is large, so that sludge bulking is not easy to happen; the system has strong load impact resistance and good treatment effects; and the simultaneous denitrification and dephosphorization effects of the BBAF are obvious by adjusting the cycle of operation and controlling the working procedure time length.