Device and method for removing algal bloom and purifying algae source in branch reservoir bay of channel reservoir

Abstract

The invention discloses a device and a method for removing algal bloom and purifying an algae source in a branch reservoir bay of a channel reservoir. The device comprises an algal bloom removing unit, an algae source purifying unit and a clarifying unit. The feature of periodic immersion and exposure of a hydro-fluctuation belt of the branch reservoir bay of the channel reservoir is ingeniously utilized, the device is built according to the geographic features of the hydro-fluctuation belt and is quite convenient to install and maintain at the low water level; the algal bloom removing unit can rapidly layer, locate and eliminate the algal bloom in a water body during the high-water-level algal bloom; on one side, the algae source purifying unit controls the flow state of the water body based on the fluid mechanics principle to assist in enhancing the implementation effect of the algal bloom removing unit, and on the other side, the algae source purifying unit is used to destroy the biological activity of algae-source tiny cells in the water to eradicate in depth the algae-source tiny cells in the water; and the clarifying unit adopts a rubber dam, so that the main natural function of the reservoir is not affected during the period without algal bloom.

Description

technical field [0001] The invention relates to a device and method for eliminating water blooms and purifying algae sources in a bay of a tributary of a river-type reservoir, belonging to the fields of water conservancy engineering and water environment protection. Background technique [0002] With the continuous increase of industrial, agricultural, and municipal pollution discharge loads, the water environment pressure on my country's surface water resources continues to increase. The problems of eutrophication and algal blooms in river-type reservoirs are relatively prominent, and have become one of the bottlenecks restricting the sustainable development, construction and operation of water conservancy and hydropower projects. Before the water storage of river channel reservoirs, the flow rate is fast, the water body has strong self-purification ability, and it is not easy to form algae blooms; after the reservoir water storage, the water flow rate drops suddenly, and a...

AI Technical Summary

Problems solved by technology

However, there are some obvious limitations and deficiencies in the above-mentioned traditional technologies:

[0004] (1) Although the physical method can quickly reduce local algal bloom disasters, it is generally only effective for large-scale concentrated algae blooms, and cannot eradicate low-concentration algal blooms or micro-cells of algae in water. The cost is also high and cannot be used on a large scale use;

[0005] (2) The chemical method only transfers the bloom algae from the water phase to the sediment, and there is a possibility of secondary pollution. In addition, this method introduces new chemical components into the water body, and some algicides are even toxic;

[0006] (3) The biological method has a long cycle and does not have the ability to quickly control large-scale sudden algae blooms. At the same time, this method strengthens a certain type of biomass in the food chain, and the long-term impact on the ecosystem is difficult to measure;

[0007] Generally speaking, the traditional water bloom control technology can only partially reduce the apparent symptoms of water blooms, and it is difficult to eradicate the algal microcells in the water body, which is one of the reasons why the water blooms are easy to recur after treatment; Restricted by conditions, traditional algal bloom control techniques can only work in a small area, and at the same time need to rely on people, boats, vehicles, etc., which is time-consuming and laborious, and the implementation effect is often not ideal

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