Anti-wave emergency restoration process for polluted natural water body

Abstract

The invention discloses an anti-wave emergency restoration process for a polluted natural water body. In a system for processing the water body by a flocculation method, short fibers accounting for 0.005 to 1 percent of the weight of the water body and a flocculating auxiliary agent accounting for 0.001 to 0.2 percent of the weight of the water body are added and the flocculating auxiliary agent can be cross-linked with a flocculating agent. The process comprises the following steps: firstly, adding the short fibers into the water body in advance or before the addition of the flocculating auxiliary agent and adding the flocculating auxiliary agent after the addition of the flocculating agent; secondly, generating microbubbles in the water body by using materials spontaneously generating gas to make compound flocs catch the microbubbles and achieve a compression compact effect during rising; and finally, catching the flocs and finishing the emergency restoration. The emergency restoration process can be suitable for performing restoration in the various natural water bodies with slight wind waves and complex hydrological conditions and fulfills the aim that the flocs cannot be easily destroyed by the wind waves within certain time, thereby effectively removing pollutants from the water body and solving the problem of effectively removing the pollutants from the water body in a low cost in the presence of wind waves.

Description

Technical field [0001] The invention relates to an emergency repair process for contaminated natural water bodies capable of resisting wind and waves. technical background [0002] Natural water pollution is currently an important environmental protection problem faced by all countries in the world. It is characterized by the uneven distribution of pollutants in water, suspended solids and bottom mud. The ultimate goal of pollution remediation is to remove the pollutants from the water body and restore the normal state of the water body. The key point that is different from industrial sewage treatment is that natural water treatment can be carried out in mild wind and waves, and it is impossible to have the same complete equipment as industrial sewage treatment. [0003] At present, the main repair types in the world are: [0004] 1. Bioremediation technology, mainly using higher aquatic plants and microorganisms, through artificial biological floating islands (initiated by German ...

AI Technical Summary

Problems solved by technology

The disadvantage is poor adaptability. In deep water, highly turbid water, sea areas, estuary areas with frequent changes in salinity, when the temperature is too low or too high, the wind and waves are strong, and the polluted waters are particularly serious, it is difficult for specific organisms to survive or It is difficult to form an effective community, making it difficult for this type of technology to implement restoration

[0006] 2. Physical remediation technology, mainly including artificial aeration, sewage interception and filtration, water diversion and flushing, river dredging and other measures to transfer pollutants. The repair cost is high and the processing speed is slow. Usually, it cannot be used as a rapid repair process, and it is easy to cause Leakage or secondary pollution

[0012] However, the inventors found in repeated experiments that the material can indeed capture about 90% of mature conglomerated algae, but cannot remove colloidal algae spores and scattered juvenile unicellular algae, let alone remove eutrophication in water Chemical substances such as phosphorus, which cause the restored water body to still have more algae and reproduce rapidly

At the same time, the material is only used for oil, and heavy metal pollution treatment is not feasible

Its main defect is that: the material is composed of fibers and flocculants. Theoretically, the flocculants can only bridge the net to catch suspended solids, and have poor flocculation ability, so they are ineffective for colloids and dissolved substances; the role played by fibers here is mainly It is to absorb the algae group containing flocculant and also play a role in strengthening the aggregate

However, there are still some shortcomings: 1. The electric float needs to be repaired and the water body can conduct electricity, which is not suitable for use in freshwater waters; 2. The magnetic separation technology requires the water body to be repaired to be shallow water, otherwise the equipment is difficult to install and provide a magnetic field; 3. Including dissolved air All these methods, including floating, have the disadvantage of a. The fragility of flocs cannot be solved. Therefore, in natural rivers, seas and lakes with moderate wind waves and complex hydrological conditions, flocs are easily scattered by wind waves or turbulence, and cannot be captured efficiently or Floating to the surface causes restoration to fail

b. For slightly larger and deeper water bodies, it is necessary to establish an air flotation platform to collect floating flocs, otherwise a large number of air flotation equipment is required, and the investment is too high. However, the disadvantage that still exists after using the platform is that the clean polluted area will be damaged due to untreated Regional polluted water flows are polluted again