Method for upgrading and transforming Orbal oxidation ditch

Abstract

The invention discloses a method for upgrading and transforming an Orbal oxidation ditch, which comprises the following steps: pretreated sewage flows into an anaerobic tank through a water inlet pipe, and the anaerobic tank is connected with the Orbal oxidation ditch through a water outlet pipe. The Orbel oxidation ditch is subjected to function partition adjustment, the whole outer ditch is transformed into an anoxic zone, a microporous aerator, a submersible water impeller and a dissolved oxygen meter are mounted in the anoxic zone, an inner ditch and a middle ditch are transformed into aerobic zones, and a microporous aerator, a submersible water impeller, an internal reflux pump, an effluent weir gate, a dissolved oxygen meter and a sludge concentration meter are mounted in each aerobic zone. And the air suspension fan is connected with the microporous aerators through the aeration pipeline, the ABS aeration main pipe and the ABS aeration branch pipes. The method is simple, practical and excellent in treatment effect, overcomes the defects in the existing Orbel oxidation ditch treatment process, and can be used for upgrading and transforming the Orbel oxidation ditch by carrying out functional partition adjustment on the Orbel oxidation ditch and additionally arranging the anaerobic tank at the front end, so that the treatment efficiency of the Orbel oxidation ditch is improved. And the organic matter removal rate and the nitrogen and phosphorus removal efficiency of the Orbal oxidation ditch process are improved, so that the effluent quality can stably reach the standard.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a method for upgrading and transforming an Aubert oxidation ditch. [0002] technical background [0003] Aubert Oxidation Ditch is a multi-channel oxidation ditch system, which is generally composed of multiple circular or oval channels, and the multiple channels are connected to each other. The sewage first flows into the outer channel, and then mixes with the return sludge and flows through the outer channel in turn. Enter the middle channel and the inner channel, and after circulating dozens to hundreds of times in each channel, it flows into the secondary sedimentation tank through the outlet weir gate of the central island. [0004] Aubert oxidation channels usually use surface aeration equipment for oxygen supply and stirring. However, since the surface aeration equipment is installed on the surface of the water body, there is a large difference in water flo...

AI Technical Summary

Problems solved by technology

[0004] Aubert oxidation channels usually use surface aeration equipment for oxygen supply and stirring. However, since the surface aeration equipment is installed on the surface of the water body, there is a large difference in water flow velocity between the upper and lower layers. It is difficult to control the volume and dissolved oxygen concentration of the aerobic zone and the anoxic zone in the same ditch, so the efficiency of nitrogen and phosphorus removal in the Aubert oxidation ditch is low, and the effluent quality is difficult to reach the standard stably

Images