Method for repairing lake and anaerobic bottom mud by nano bubble

Abstract

The invention provides a composite material which uses nanometer bubbles to rapidly eliminate lake algae bloom and repair anaerobic substrate sludge. The composite material repairs anaerobic substrate sludge, increases the oxidation-reduction potential of the substrate sludge and the dissolved oxygen level of the water body while rapidly eliminating algae blood in a large area and increasing the transparency of the water body. The nanometer bubbles are oxygen nanometer bubbles, ozone nanometer bubbles or air nanometer bubbles. Natures of nanometer bubbles such as quantity, size, density and the like can be adjusted and controlled with a particular method. The invention also provides a method for using the composite material to repair the lake and anaerobic substrate sludge, which comprises that a mechanical method is used for spreading or spraying the composite material onto the lake surface, thus simultaneously finishing the algae bloom removal in the large area, increasing the transparency of the water body, repairing the anaerobic substrate sludge, increasing the dissolved oxygen level of the water body, and providing a good environment for the rapid growth of submerge vegetation and ecological restoration of the eutrophication water body; and the method has ecological security and long effect of the lake treatment.

Description

technical field [0001] The invention relates to a composite material and method for treating lake pollution and restoring anaerobic bottom mud by using nano bubbles. The invention belongs to the field of nanotechnology and environmental pollution control. Background technique [0002] The eutrophication of water body is a serious problem in water pollution in my country. In eutrophic water body, the content of dissolved oxygen is low, the transparency of water body is not high, the substrate is severely anaerobic, the content of nutrient salt in water body is high, and the water quality deteriorates. At present, many disclosed natural water pollution control and control technologies are considered unsuitable for such large-scale natural water bodies due to their own technical defects and limitations of many factors. It is banned, and the biological method is difficult to be applied on a large scale due to reasons such as selectivity, preparation and cost. In addition, to ...

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Problems solved by technology

In 2002, the inventor proposed a patented technology (application number: 02155284.3) to prepare an efficient and non-toxic algae flocculant with natural high molecular polymer modified clay for algal bloom control. Any local soil modification becomes an efficient algae flocculant, and can treat eutrophic water bodies on a large scale and at low cost, but this technology has its defects: the added clay increases the accumulation of sediment and sediment, and the sediment that settles to the bottom The death and decomposition of algae consume a large amount of oxygen, resulting in substrate anaerobic

In order to overcome the above-mentioned defects, the inventor proposed a patented technology (application number: 200310113305.5) for controlling the secondary pollution of algal blooms and bottom mud with lake sediments in 2003 and 2005, and a method of using clay to coagulate water The method of transforming Chinese flowers into underwater vegetation (application number: 200510099736X). Although the above two technologies are low cost and can be applied on a large scale, they are one step closer to the ecological security and long-term effect of governance. However, in the bottom The effect of mud restoration and improvement of dissolved oxygen level in the water body is not significant, and the recovery of submerged vegetation is relatively slow

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