A cyclone flotation treatment system and method for algae-containing wastewater

Abstract

The invention provides a system and a method for cyclone flotation treatment of algae-containing wastewater. The system comprises a mixer, a filter and a tank body integrally placed in a vertical manner, wherein the position of the inner cavity close to the bottom part of the tank body is horizontally provided with a hollowed-out plate; an inner drum with the top part opened and the bottom part closed is vertically arranged on the hollow-out plate; the area of the interior of the inner drum forms a cyclone flotation zone; the area between the inner drum and the inner wall of the tank body form a precipitation zone; the interior of the cyclone flotation zone, from bottom to top, is successively provided with a bubble generator and swirl vanes capable of enabling water to generate cyclone through horizontal rotating; the water inlet of the tank body communicates with a water inlet channel which is downward arranged and extends to the upper part of the swirl vanes; and the top part of the tank body is provided with a scum concentration zone and an effluent weir used for effluent overflowing of clear water. The method provided by the invention comprises the following steps: adding a flocculant and carrying out a flocculation reaction, and subjecting the filtered wastewater to cyclone flotation so as to remove impurities with a density larger than or less than the density of water, wherein the removal efficiency to algae is high.

Description

technical field [0001] The invention belongs to the technical field of algae removal in water bodies, and in particular relates to a cyclone flotation treatment system and method for algae-containing wastewater. Background technique [0002] my country mainly uses lake water or reservoir water as the main source of drinking water. During the development of industry and agriculture, a large amount of pollutants are discharged into rivers and lakes, causing eutrophication of rivers and lakes. Especially in summer, the content of organic matter in the water is high, and the algal blooms are more prone to eutrophication. Algae are light and easy to float. It is difficult to remove them by the traditional sedimentation solid-liquid separation process, and it will also affect the subsequent treatment process, such as causing blockage of the filter and shortening the operation cycle. Therefore, under the present condition that the algae outbreak in the water body cannot be effecti...

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Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: in the prior art, in the air flotation algae removal, the removal efficiency is not high, the dosage is large, the algae residue treatment efficiency is low, the treatment process device is complicated, and the operation To avoid technical problems such as instability, and provide a cyclone flotation treatment system and method for algae-containing wastewater with high removal efficiency, no secondary pollution, stable operation, convenient operation, low energy consumption, and simple process

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