Restoration technology for treating eutrophic shallow and slow flow riverways

Abstract

The invention provides a restoration technology for treating eutrophic shallow and slow flow riverways. The restoration technology is characterized by comprising three links of salvaging floating garbage, algae and the like in the riverway, so as to prevent a PRB permeable reactive barrier from being blocked; intercepting by a fine rack, so as to prolong the service life of the PRB permeable reactive barrier; a water body passes through the PRB permeable reactive barrier, and realizes the purpose of restoration through multistage filtering. The PRB permeable reactive barrier consists of pull-out blocks, and each block is formed by cushion layers at two sides, a filling layer in the middle and a meshy filling supporting frame outside the block. Each block is independently suspended in the riverway to be restored, and is capable of being pulled out, after being saturated through adsorption and filtration, the block can be pulled out for replacement, so that the maintenance is facilitated. Filling in the block may be one or more of activated carbon, ceramsite, coal ash, zeolite, scrap iron and the like. After being treated by the multistage PRB permeable reactive barrier, the eutrophic shallow and slow flow riverway water body can reach the corresponding water quality requirement.

Description

technical field [0001] The invention belongs to the field of river restoration and management, and in particular relates to a shallow slow-flow river management technology for eutrophication, the core link of which is a permeable reaction wall. Background technique [0002] Eutrophication of water body refers to the occurrence in fresh water, where the high content of nitrogen, phosphorus, and potassium in the water body leads to the sudden excessive increase of algae and the rapid reproduction of other plankton, the content of dissolved oxygen in the water body decreases, and the water quality continues to deteriorate. The phenomenon of mass death. [0003] The reason why water bodies become eutrophic is that the content of nitrogen, phosphorus and potassium in water bodies is too high. The sources of nitrogen, phosphorus, and potassium can be divided into artificial sources and natural sources, and the main cause of excessive content is artificial sources. Studies have s...

AI Technical Summary

Problems solved by technology

Second, due to the eutrophication of the water body, the plankton that multiply in large numbers will reduce the transparency of the water body and consume a large amount of oxygen. At the same time, it will also affect the photosynthesis of plants in the water, reduce the release of oxygen, and cause the content of dissolved oxygen in the water to decrease. As a result, a large number of fish are killed, and some plankton will also produce toxins that endanger the life and health of humans and animals.

Third, water eutrophication will destroy the living environment of aquatic organisms, degrade aquatic organism species, destroy aquatic biodiversity, and destroy the balance of aquatic ecosystems

Fourth, the phenomenon of eutrophication may also affect the development of tourism and block waterways

However, these methods have a long purification cycle, poor treatment effect, basically treat the symptoms but not the root cause, the treatment cost is relatively high, and long-term maintenance is required. In terms of biological treatment technology, it is difficult to adapt to the northern climate, and it needs to be replanted and renovated every year, which consumes a lot of investment.

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