Low-sludge-yield multiplication combined type multi-stage biochemical reaction sludge process reduction system and low-sludge-yield multiplication combined type multi-stage biochemical reaction sludge process reduction method

The invention provides a low-sludge-yield multiplication combined type multi-stage biochemical reaction sludge process reduction system which is provided with an anaerobic hydrolysis reactor, an anaerobic sludge interception reactor, a first-stage anoxic reactor, a first-stage aerobic reactor, an oxygen elimination reactor, at least one second-stage reactor and a secondary sedimentation tank which are sequentially communicated along a sewage inlet direction, the second-stage reactor comprises a second-stage anoxic reactor and a second-stage aerobic reactor which are sequentially communicated along the sewage inlet direction; and the system further comprises a sludge tank. The invention further provides a low-sludge-yield multiplication combined type multi-stage biochemical reaction sludge process reduction method. According to the low-sludge-yield multiplication combined type multi-stage biochemical reaction sludge process reduction system and method, the carbon and nitrogen reduction effect of the system is