Sludge concentration tank and sludge concentration reduction system

The utility model relates to a sludge thickening tank which is characterized in that the top of an opening of a tank body is closed through a cover, and a first odor pumping and discharging pipe is arranged on the cover; a central platform and an annular sludge collecting tank surrounding the central platform are arranged at the bottom of the tank body, the bottom end of a rack of the concentration sludge scraper is supported on the central platform, a central rotating shaft is connected with a driving motor arranged on the cover cap, and a sludge inlet pipe extends to the lower part of the tank body, vertically and upwards penetrates through the central platform and then is connected with a flow stabilizing cylinder arranged on the concentration sludge scraper; and the sludge outlet pipe is communicated with the annular sludge collecting tank. In addition, the utility model also comprises a sludge concentration and reduction system of the sludge concentration tank. According to the utility model, odor in the