Ecological purification system and method for treating black and odorous water body

Abstract

The invention provides an ecological purification system for treating a black and odorous water body and belongs to the technical field of water treatment. The system comprises a settling area, a discoloring area, an anoxic area and an aerobic area through which the black and odorous water body can sequentially flow, wherein settling of impurities can be realized in the settling area by reducing flow velocity of the black and odorous water body; a flocculating agent is added into the discoloring area; the anoxic area is filled with a specific microbial activation filling material used for activating beneficial microbes in the black and odorous water body; the addition amount of the specific microbial activation filling material is 2300-5000mg added in the black and odorous water body per liter; the aerobic area is filled with fixed fibrous packing and high porosity packing; and a volume ratio of the anoxic area to the aerobic area is 1:5 to 1:7. The system disclosed by the invention is simple in process, small in occupied area, convenient in operating management, low in investment and operating cost and wide in condition adapting range and can be widely applied to ecological remediation of rivers and landscape water bodies.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an ecological purification system and method for treating black and odorous water bodies. Background technique [0002] With the development of the city, environmental pollution continues to plague the lives of residents, such as air pollution, surface water pollution, soil pollution and so on. The development of human beings depends on water, but the water we rely on for survival has changed and become black and smelly. [0003] Black and odorous water body is an important manifestation of current water body pollution, that is, a large amount of nutrients such as nitrogen and phosphorus in the water body accumulate, the water body is severely anoxic, the sediment has historically deposited seriously, and the water body has poor transparency. The essential problem is the destruction of water body biodiversity. This causes the system to lose the ability of sel...

AI Technical Summary

Problems solved by technology

Sediment dredging technology often involves a huge amount of work, and it is easy to cause secondary pollution problems; it is a common method to control water pollution by diverting and changing water and diluting the impurity concentration in water, but for isolated remote closed water bodies, It is often difficult to clear and release turbidity; aeration and oxygenation can increase the dissolved oxygen in the water body and improve the black and odorous water body, but it is difficult to fundamentally remove the pollutants, often treating the symptoms but not the root cause. Self-purification ability has not been effectively restored

[0006] Chemical methods: such as adding chemical agents to kill algae, adding iron salts to promote phosphorus precipitation, adding lime to denitrify, etc., but it is easy to cause secondary pollution, and the operating cost is extremely high, usually only as an emergency measure to deal with sudden water pollution

[0007] The traditional biological bypass water treatment process can effectively remove organic C, N, and P in wastewater, but its biological removal mechanism is completed in a closed microbial action unit, and phosphorus removal is mainly completed through sludge discharge. The generation of a large amount of sludge not only causes secondary pollution, but also has extremely high investment and operating costs. How to effectively treat and dispose of a large amount of excess activated sludge has become a bottleneck in the development of modern sewage treatment plants.

The traditional biological treatment process represented by the activated sludge method is difficult to apply to the restoration of river courses and landscape water bodies

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