Drop type waterwheel oxygenation biological contact oxidation pond

Abstract

The invention discloses a drop type waterwheel oxygenation biological contact oxidation pond, which comprises a biological contact oxidation reaction pond of at least two stages, wherein a rectangular shallow pond of the biological contact oxidation reaction pond is partitioned into a downward flow reaction region and an upward flow reaction region; the upper part of the downward flow reaction region is provided with an auxiliary oxygenation runner waterwheel; and the auxiliary oxygenation runner waterwheel is provided with blades. Natural fall or a water pump is used for lifting into a multi-stage drop type waterwheel oxygenation biological contact oxidation pond at one time for performing aerobic treatment, a part of effluent at an aerobic stage enters a subsequent constructed wetland, and a part of effluent reflows to an anoxic stage for denitriding. Due to the arrangement of water fall baffle plates, the contact time of sewage and the atmospheric air can be prolonged, and the oxygenation effect is enhanced; and due to the arrangement of the auxiliary oxygenation runner waterwheel, the sewage can be cut by the blades, the contact area with the atmospheric air is increased, and the oxygenation effect is enhanced. Under the rotating action of the auxiliary oxygenation runner waterwheel, perturbance of a water body can be increased appropriately, and the fall and update of a biological membrane are facilitated.

Description

[0001] technical field [0002] The invention belongs to the technical field of water pollution control, and relates to a drop-type water wheel oxygenation biological contact oxidation pool suitable for small domestic sewage treatment. [0003] Background technique [0004] Dissolved oxygen is an important factor affecting the sewage aerobic treatment unit. Traditional sewage aerobic biological treatment units generally use blower aeration or mechanical aeration to maintain the required dissolved oxygen. The operating cost of aeration equipment is huge, usually accounting for a large part of the entire treatment cost, and the oxygenation efficiency is low , generally only about 20%. The treatment process of small-scale decentralized domestic sewage should be researched in the direction of adapting measures to local conditions, energy saving and emission reduction, resource utilization, and landscaping. The falling water aeration technology utilizes the natural reoxygenati...

AI Technical Summary

Problems solved by technology

However, the efficiency of natural oxygenation is far lower than that of energy-consuming aeration. In the existing cases of waterfall-type oxygenation, the oxygenation effect is generally poor, and blindly increasing the height of the water drop to improve oxygenation efficiency will inevitably lead to Increased pump energy consumption

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