System and method for realizing online treatment of black-smelly riverway water

Abstract

The invention discloses a system and a method for realizing online treatment of black-smelly riverway water. The method comprises the following steps: (1) setting up at least one purifying channel, isolated from a main river channel, at one side of a sewage outfall along the river bank, wherein water inlets of the purifying channels are communicated with the sewage outfall, and water outlets of the purifying channels are communicated with the main river channel; (2) sequentially carrying out sedimentation treatment on wastewater discharged from the sewage outfall in the purifying channels by using a sedimentation unit; (3) using an anaerobic unit to perform anaerobic treatment on the wastewater subjected to the sedimentation treatment; (4) carrying out oxidation treatment on the wastewater, subjected to the anaerobic treatment, by using a contact oxidation unit; (5) carrying out retreatment on the wastewater, subjected to the oxidation treatment, by using a plant unit. The system and the method can enable a black-smelly riverway main body to rapidly restore ecological self-purification capacity after sediment dredging, thus avoiding the vicious circle that the riverway water is black and odorous again after being treated; furthermore, the system and the method do not affect the functions of normal flood control, drainage of stagnant water and navigation of the riverway.

Description

technical field [0001] The invention relates to an on-line intensified water body treatment technology that involves the water quality purification function of black and odorous rivers and does not affect the flood discharge and navigation of the rivers. It belongs to the field of water environment governance. technical background [0002] Black and odorous river treatment is an important branch of water environment treatment. Due to weak awareness of environmental protection and neglect of supervision and protection, a large amount of industrial, agricultural, and domestic sewage and wastewater are directly discharged into the river. When the input pollutant load exceeds the self-purification capacity of the water body, it will inevitably lead to severe hypoxia in the water body, river siltation, hardening, and water pollution. The food chain is seriously lost, and the water body will produce black odor in the long run. Black and odorous rivers not only cause the water bo...

AI Technical Summary

Problems solved by technology

After the high-load pollutants from the sewage outlet are directly discharged into the river, they will quickly pollute the entire water body. The Chinese patent CN105502803A can only temporarily eliminate or alleviate the black and odorous state by adding chemical, biological agents, and water aeration. In the case of input, there will inevitably be repeated black and odor in the river, and the removal effect of the undesigned anaerobic unit on the macromolecular organic matter that is difficult to biodegrade is poor

Chinese patent CN201406359 has a certain treatment effect by setting garbage grids, buffer partitions and small artificial wetlands in the upstream and downstream of the river, but it also lacks anaerobic treatment units, and will affect the navigation and flood drainage functions of the river.

This kind of treatment technology needs to occupy a large proportion of the main body of the river, and the treatment plan also has certain shortcomings: the project is huge, the cost of manpower and material resources is high, and the treatment effect is short-lived, which leads to the occurrence of black and smelly cycles, etc.

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