Odor detection device and method of rainwater and sewage confluence system

The invention discloses an odor detection device and method of a rainwater and sewage confluence system. The odor detection device of the rainwater and sewage confluence system comprises a water inletpipe, an overflow pipe, a water outlet pipe, a box and detection holes, wherein the nominal diameter of the water inlet pipe is not smaller than 50 mm, the top of the opening of the water inlet pipeis vertically arranged to realize whole pipe flow, confluent rainwater and sewage containing suspended particles flow into the box from the water inlet pipe thorough a water pump, and the sewage freely falls into the box after flowing through a water inlet; under the impact action of water phases, the confluent rainwater and sewage entering the box are subjected to gas-liquid separation, and produced odors overflow to the detection holes; the water phases are discharged to the water outlet pipe after flowing through the overflow pipe. The odor production uniformity and continuity are controlled and optimized by using l