The utility model relates to an integrated
flocculation and
sedimentation tank which comprises a
flocculation zone and a
sedimentation zone which are integrated, an inner cavity of the
flocculation area is divided into a plurality of baffling areas by second partition plates, the baffling areas are communicated end to end to form an S-shaped circulation channel, a water inlet is formed in one end of the circulation channel, and a water outlet is formed in the other end of the circulation channel; the
settling zone is divided into a water inlet zone and a
settling zone by a vertical third partition plate, the bottom of the water inlet zone is communicated with the bottom of the
settling zone, and the water outlet is communicated with the water inlet zone; a settling
assembly is arranged in the settling area, and a
sludge collecting hopper is arranged below the settling
assembly; and a horizontal water outlet groove is formed above the
sedimentation assembly. The
wastewater added with the flocculating agent enters the flocculation area, suspended matters in the
wastewater are contacted with the flocculating agent and are agglomerated, and as the circulation channel of the flocculation area is S-shaped, the flowing path of the
wastewater in the flocculation area can be prolonged, and the
retention time can be prolonged, so that the mixing time of the suspended matters and the flocculating agent is prolonged, the suspended matters are ensured to be fully contacted with the flocculating agent, and the flocculation effect is improved.