The invention discloses a
sewage treatment
precipitation system. The
system comprises: a
precipitation tank provided with a
precipitation cavity, wherein a supporting convex ring is arranged on the side wall of the middle part of the precipitation cavity, a
sludge outlet
pipe is arranged at the bottom, aligned gaps are arranged on the two opposite side walls of the precipitation cavity, and an opening is formed at the upper part of the gap; an inclined plate
assembly arranged in the precipitation cavity, wherein the bottom of the inclined plate
assembly is supported on the supporting convex ring, and the inclined plate
assembly comprises inclined plates which are arranged obliquely; and an overflow
pipe embedded into the notch and detachably connected with the side wall of the
sedimentation tank, wherein an opening is formed in one end of the overflow
pipe and extends out of the
sedimentation cavity, and an overflow opening is formed in the side wall of the overflow pipe. The supporting convex ring is used for supporting and limiting the inclined plate assembly, so that the inclined plate assembly can realize stable position without a
fastener, the notch plays a certain role in limiting and supporting the overflow pipe and can play a role in pre-positioning during mounting, and the overflow pipe and the
sedimentation tank can be detachably mounted conveniently; and disassembly and assembly are convenient, and later maintenance is simple.