The invention discloses a
sewage treating device with a multiple water inlet point multi-grade bioflim reactor. N pieces of separating plates are vertically arranged inside a tank to divide the tank into N+1 reaction pools in series. The adjacent reaction pools are orderly communicated with the lower part to the upper part, wherein, the first N-1 grades are functioned with anaerobic and
aerobic reaction alternately, every
pool is provided with flexible assembled fillers; the N grad is the
aerobic reaction area with flexible assembled filler, and the N+1 grad is the filtering and depositing area; a water inlet
pipe is arranged at the top of the tank and is respectively communicated with the water inlet of the first N-1 grades, applying a
water supply with multiple points; a water outlet
pipe is led out of the upper part of the N+1 grade reaction
pool; the bottom parts of the first N grade reaction pools are provided with an
underwater aeration device, and the bottom part of the N+1 grade reaction
pool is provided with a
backwashing pipe. The bottom part of every pool is provided with a
sludge discharge pipe. The treatment device has the advantages of great
impact loading resistant ability, high treatment efficiency, low operation
energy consumption, less left
sludge, simple procedure, small
land occupation, low investment and convenient operation.