Compact reactor for aerobic biological waste water purificn. - has reaction chamber connected to post-clarifier by vertical circulation system with central riser pipe and pump

摘要

The biologically active reaction chamber is connected to the post-clarification chamber by a vertical circulation system. This system consists of a central riser pipe with an axial pump and a conical inlet section near the floor of the reactor, and is provided with a flow-reversing hood whose height can be adjusted, pref. telescopically. An upper gas inlet is provided and a falling flow pipe surrounds the riser pipe and the flow reversing hood, and extends from the level of the highest point of the hood to near the inlet section. The overflow edge of the post-clarification chamber is below the level of the hood, and an outlet pipe with a liq. level control valve is located between the riser pipe above the pump and the distributor of the post-clarification chamber. The sludge recirculation pipe from the post-clarification chamber and the waste water inlet are preferably connected to the upper part of the falling flow pipe. Overflow openings are provided in the falling-flow pipe immediately above the level of the overflow. USE/ADVANTAGE - Used in the aerobic biological treatment of waste water. The technical functions of the unit (a high deg. of aeration, avoidance of sludge deposition, effective biomass sepn., etc.) are achieved with a minimal maintenance requirement and with simple and reliable control of foaming, while occupying the smallest possible floor space and with min. energy consumption.