Integrative three-bent tridimensional cyclic oxidation ditch

Abstract

The invention relates to an integrative three-bent tridimensional cyclic oxidation ditch, which comprises an oxidation ditch, a solid-liquid separator and an aeration rotary brush. The upper part of the oxidation ditch is provided with a water inlet, and the aeration rotary brush is arranged in front of the water inlet. The integrative three-bent tridimensional cyclic oxidation ditch is characterized in that the solid-liquid separator is arranged at the side of the oxidation ditch; two partition boards are arranged in the oxidation ditch to divide the oxidation ditch into an upper aerobic zone, a middle anoxic zone and a lower anaerobic zone as three communicated chambers; and the bottom of the solid-liquid separator is communicated with the lower anaerobic zone, and the upper part of the solid-liquid separator is provided with a water outlet. The ditch has the advantages of compact structure, simple construction and stable and reliable treating effect; compared with the prior oxidation ditch, the occupied area can be reduced by 66 percent; and the ditch is particular suitable for domestic sewage treatment for countryside scattered residential areas, army camps, docks, and the like.

Description

technical field [0001] The invention relates to a device for treating sewage by biochemical technology, in particular to an integrated three-fold three-dimensional circulation oxidation ditch. Background technique [0002] The currently known oxidation ditch sewage treatment technology was developed in the 1950s and belongs to a modification of the activated sludge treatment process. It is mainly composed of an oxidation ditch, a secondary settling tank and a sludge return system. Since the birth of the oxidation ditch process, its development process can be divided into three stages: the first generation oxidation ditch is the Pasveer oxidation ditch (see image 3 ), and use aeration brushes and vertical aerators. The second generation is the carrousel oxidation ditch (see Figure 4 ) and Obert (orbar) oxidation ditch (see Figure 5 ). [0003] The common feature of these oxidation ditch devices is that the oxidation ditch is a flat circulating closed ditch, using a rota...

AI Technical Summary

Problems solved by technology

Its disadvantages are: the secondary sedimentation tank is built in the circulation channel, which increases the water flow resistance and increases the requirements for aeration equipment

However, the three-dimensional circulating oxidation ditch has only one partition to divide it into upper and lower parts, the upper part is an aerobic zone, and the lower part is an anoxic zone, which can only realize nitrification and denitrification but not dephosphorization

Moreover, due to the limited depth of the ditch, the utilization rate of oxygen is still low, and the occupied area can be further reduced

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