175 results about "Activated sludge system" patented technology

The invention discloses a bio-augmentation treatment sludge in-situ reduction method, which is characterized in that: on the basis of a traditional active sludge biochemical treatment system, functional microbial inoculum is additionally added to enhance organic matter degradation and a metazoan is additionally added to enhance predation so as to optimize a biotic community structure, so the sludge in-situ reduction can be realized during the sewage treatment process, and the sludge reduction effect can reach 60 percent to 100 percent. The functional microbial inoculum is a mixed flora which is specially used for the sludge reduction and is obtained through directed selection domestication culture and comprises five types of special bacterial strain selected from soil and active sludge. The metazoan is a vermes-typed micro metazoan which is selected in a laboratory and is used for the bio-augmentation predation of an active sludge system through the propagation. Through the bio-augmentation treatment method, the sludge in-situ reduction can be realized under the situation that the normal running of a sewage plant is not influenced, and the method has the characteristics of less investment, low running expense, fast action, stable running and the like. The method has general adaptability to ordinary sewage biochemical treatment systems.

The invention provides an activated sludge-biomembrane combined circulating flow denitrification and desophorization integrated sewage treatment device and a method. The integrated sewage treatment device consists of an improved CASS (Cyclic Activated Sludge System) reactor and a chemical dephosphorizing pond, wherein the inner ring of the improved CASS reactor is served as an anaerobic region, the outer ring is provided with an anoxic region and an aerobic region hung with biomembranes alternately, and the impact load resistance capability of the improved CASS reactor is increased through the flow state combined by a pushing flow and a mixed flow. The integrative sewage treatment device is only provided with an aeration device on the outer aerobic region, an anoxic region or even an anaerobic region is arranged after the aerobic region because the concentration of dissolved oxygen changes from high to low at the downstream of the aeration device, therefore, denitrifying bacteria can directly utilize nitration products to denitrify, and promote nitrification and denitrification to simultaneously generate in the device. The impact load resistance capability of the reactor can be strengthened through the biomembranes arranged alternately, a bidirectional sludge underwater plug-flow device is utilized to prevent the biomembranes to block circulating sludge, the simultaneous occurrence of nitrification and denitrification reactions in the reactor is beneficial to reducing aeration amount and energy consumption, and the volume of the reactor can be reduced because of dispensing with an anoxic pool and a secondary sedimentation tank, thereby saving construction cost and operation cost. The integrated sewage treatment device is suitable for sewage treatment in small towns with insufficient funds.