In-situ water body remediation method and corresponding in-situ water body remediation system

Abstract

The invention relates to an in-situ water body remediation method and a corresponding in-situ water body remediation system. The method provided by the invention comprises the steps that a filler layer is arranged under bottom mud, and the bottom mud is laid on the filler layer; and an under-mud drainage pipe is arranged on the lower part of the filler layer, draining under the bottom mud is carried out through the under-mud drainage pipe, a water body on the bottom mud overall moves downwards to form a water current passing through the bottom mud, and thus the oxygen contents of various positions in the vertical direction of the bottom mud and the water body are improved. The system provided by the invention comprises the filler layer laid on a water body base and the bottom mud laid on the filler layer; the under-mud drainage pipe is arranged on the lower part of the filler layer; and the filler layer includes a filler water-collection layer, a filler purifying layer and a filler filtering layer in sequence from bottom to top. According to the method and the system provided by the invention, the self-purifying capability of the water body can be improved, especially the purifyingcapability to sediments at the bottom of the water body is improved; and the environmental capacity of the water body is improved, the corresponding pollution control cost is reduced, and the bottommud desilting requirement is reduced or fundamentally eliminated.

Description

technical field [0001] The invention relates to an in-situ water body restoration method, and also provides an in-situ water body restoration system adopted or used to realize the method, which belongs to the technical field of water pollution control and environmental protection. Background technique [0002] With the rapid economic development, the problem of environmental pollution will become increasingly serious, especially water pollution, which is the most important environmental problem in my country, has always been the top priority of the government's environmental protection work. Since the reform and opening up, the country has invested huge sums of money in the restoration and treatment of urban water bodies, and good results can only be achieved for a period of time. However, water pollution is repetitive. With the change of time and the development of surrounding water bodies, more and more water bodies have re-deteriorated, making water body management more ...

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Problems solved by technology

[0003] Among them, an important problem is the continuous deposition of sediment and other forms of pollutants in the water body. The water body is continuously deposited and polluted by point sources, internal sources, and surface sources, which makes the water quality exceed the self-purification capacity over time, resulting in The water quality deteriorates, and even black and odorous water bodies are formed. Generally, the sediment of the water system needs to be dredged every 4-8 years. With the increase of water pollutants or ecological imbalance, the water body is constantly replaced. Generally, the water body of the water system is replaced once a year. -2 times

There are a number of technologies for enhancing the effect of water purification, such as artificial wetlands, construction of water ecological balance (microbes, animals, plants, etc.), aeration devices, floating island technology, sediment dredging, water recycling technology and underwater forests, etc. , but these single technologies can often only alleviate the deterioration of water quality locally, and lack effective, economical and effective treatment methods for the continuous deposition of sediment pollutants

For example, artificial wetlands only guarantee the purification of water quality, but the purified water re-enters the water system and re-contaminates, which cannot fundamentally solve the self-purification ability of the water system; another example is sediment dredging. With the precipitation of pollution sources such as air, soil, water, and plants, the river bed needs to be repaired at intervals The bottom mud cannot solve the problem of river bed restoration from the root cause, especially the dredging process of the bottom mud often seriously damages the original ecology, and the disposal of the cleared sludge is also a difficult problem

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