Circulation reoxygenation biological decomposition-reinforced riverway water purification system and implementing method thereof

Abstract

The invention relates to a circulation reoxygenation biological decomposition-reinforced riverway water purification system and an implementing method thereof. The system is suitable for water-qualitylong-acting treatment on a still water riverway or an organic pollutant-enriched black and odorous water riverway. The system consists of a muddy sand sedimentation area, a multi-stage water fall reoxygenation unit, a primary sedimentation pool and a riverway biological settling bed treatment unit. The riverway biological settling bed treatment unit consists of multiple groups of biological settling beds which are arranged on the bottom surface of a river bed at intervals along the water flowing direction. After the upstream river is settled and purified by the muddy sand sedimentation area,the riverway water is further decomposed and purified on the biological settling bed treatment unit by biological flora attached to biological fillers; meanwhile, the riverway water returns to the primary sedimentation pool through a water-collecting and water-returning pipe network on the bottom layer, the riverway water is lifted to the multi-stage water fall reoxygenation unit by a water pump,is subjected to biological purification and reoxygenation treatment again and then flows back to the riverway, and so one and so forth, the riverway water is gradually purified, the ecological chain of the riverway is recovered, and the aim of reinforcing the ecological self-cleaning ability of the riverway water is finally fulfilled.

Description

technical field [0001] The invention relates to a river water quality purification system and its realization method, that is, a river with circulating reoxygenation and enhanced biological decomposition. [0002] Dao water purification system and implementation method, referred to as "Circulation Reoxygenation Biological Natural purification system (CirculationReoxygenation Biological Natural purification)" or "CRBN system". [0003] It is suitable for long-term treatment of urban still water channels or black and odorous water bodies rich in organic pollutants. Background technique [0004] The pollution problem of small and medium-sized rivers in cities and villages is becoming more and more serious. Most of the rivers have poor fluidity, the dissolved oxygen content in the water cannot be effectively supplemented, the self-purification ability of the water body is insufficient, the eutrophication is serious, and even black odor is formed, which affects people's quality o...

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Problems solved by technology

However, using clean water to improve river water quality will cause waste of water resources, and at the same time, it is easy to introduce new pollution sources in the process of water diversion

[0015] 3. The physical and chemical purification method refers to the addition of agents with flocculation and sedimentation effects in polluted water bodies. Through the flocculation and precipitation of pollutants, the effect of removing pollutants in water is achieved. Since this type of method requires repeated dosing, the cost of treatment is high. At the same time, the sediment produced by flocculation increases the sediment of the river channel and destroys the living environment of aquatic organisms. The effect is not ideal and cannot be used as a long-term treatment method.

However, this process requires a large number of biofilm modules and fixtures to be placed inside the river. It is expensive to use in a large area, and the maintenance and operation costs are high. After use, dense mesh fabrics are criss-crossed inside the river, which not only hinders the flow of the river and At the same time, due to the limited life of the membrane components, subsequent replacement and river cleaning are very difficult

In addition, in the densely populated river section of the city, once a person falls into the water, it is easy to cause limb entanglement, which poses a very high safety hazard and increases the difficulty of safety inspections.

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