Zanjon type gas-lift stream-pull tridimensional circulation type inversion A<2>O integral co-construction oxidation ditch

Abstract

The invention relates to a zanjon air lifting pushing solid circulation inversion A<2>O integrated construction oxidation ditch, which comprises an anoxic zone, an anaerobic zone, an aerobic zone provided with a millipore aerator group and an inversion A<2>O integrated construction oxidation ditch of a solid and liquid separating zone. The solid and liquid separating zone is arranged at the front end of a main ditch, the anaerobic zone is arranged at the tail end of the main ditch, and water inlets are respectively arranged at the front ends of the aerobic zone and the anaerobic zone. The integrated construction oxidation ditch is characterized in that a horizontal partition board which divides the main ditch into an upper groove layer and a lower groove layer is arranged at the middle-lower part of the main ditch, the aerobic zone and the anaerobic zone are respectively arranged at the upper groove layer and the lower groove layer, the aerobic zone is internally provided with n (n is more than or equal to 1) aeration lifting zone (s) which is (are) composed of an inlet water-retaining wall, an outlet water-retaining wall and the millipore aerator group and is (are) provided with a lower water inlet and an upper water outlet, the horizontal partition board of a first grade aeration lifting zone is provided with a plurality of lifting holes, and the aerobic zone is internally divided into n aerobic reaction zone (s) corresponding to the aeration lifting zone (s).The integrated construction oxidation ditch has the advantages that: the yielding water quality, particularly the dephosphorization and denitrification effect, is better, the occupation area is reduced, the equipment is reduced, the operation is simplified, and the operation cost is lowered.

Description

technical field [0001] The invention relates to sewage and waste water treatment facilities-oxidation ditch, in particular to a deep ditch air-lift push flow three-dimensional circulation inversion A 2 O overall joint construction of oxidation ditch. Background technique [0002] Oxidation ditch is a delayed aerated activated sludge water treatment process with complete mixing and integral plug-flow hydraulic characteristics. Due to its unique hydraulic characteristics of "closed circulation flow", long sludge age and low organic load , making it a water treatment process with good effluent quality, strong impact resistance, stable operation, simple process, easy maintenance, low sludge discharge, direct dehydration, and low one-time construction investment and operating costs. Widely used in industrial wastewater treatment. [0003] The deep-ditch oxidation ditch technology, represented by the technology of underwater pushers combined with microporous aerators, has risen ...

AI Technical Summary

Problems solved by technology

At present, although the oxidation ditch with microporous aeration as the oxygenation method effectively increases the depth of the oxidation ditch (for example, the water depth exceeds 6 meters), but in pursuit of a higher depth of the oxidation ditch, the oxygen supply equipment and underwater push flow equipment Both installed capacity and dynamic load will increase non-linearly, thus reducing the economics of deep trench oxidation ditch

Especially in the current situation of rapid economic development, population increase, further deterioration of natural water quality, fresh water resources, land resources and energy resources, the application of deep ditch oxidation ditch technology aimed at reducing land occupation is still subject to technical limitations and economic constraints

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