Distributed and structured town sewage pelletization treatment process and pelletization reactor

The invention discloses a distributed and structured town sewage treatment pelletization reactor which comprises a reactor body, a BDR gas stripping backflow device, a titanium alloy aerator, an ultraviolet disinfection device, an ultrasonic solid-liquid separation device, an ORP oxidoreduction potentiostat, a biological enzyme adding device, an oilless silent air compressor and the like. The reactor body forms an anaerobic granular sludge-aerobic granular sludge-biological enzyme ternary coupling recycling water purification pelletization treatment process. The pelletization reactor is a biological compositing tank, and after anaerobic-aerobic-biological enzyme ternary coupling composting, discharged sludge contains rich enzymes, nitrogen, phosphorus, potassium and other nutrients and can be directly used as high-quality green organic fertilizer. Large-proportion BDR gas stripping backflow is adopted, the very small organic matter concentration gradient in the pelletization reactor is guaranteed, the unevenn