Low-energy-consumption sustainable sewage treatment system

Abstract

The invention relates to a low-energy-consumption sustainable sewage treatment system which is characterized by comprising a zeolite zone, a ferric carbon zone and a comprehensive reaction zone, wherein an upper part communicating port and a lower part communicating port are formed between the zeolite zone and the ferric carbon zone, and the ferric carbon zone is connected with the comprehensive reaction zone by virtue of an aqueduct.

Description

technical field [0001] The invention relates to a water treatment system, in particular to a low energy consumption and sustainable sewage treatment system, which belongs to the technical field of environmental protection and sewage treatment engineering. Background technique [0002] At present, urban sewage / domestic sewage treatment is generally required to meet Class A or Class B discharge standards, and there is a high demand for saving power consumption. For small-scale sewage treatment, there is an increasingly urgent need to ensure compliance with discharge standards and to be suitable for integrated applications, but the existing technical solutions and devices have not yet achieved creative breakthroughs. [0003] The reason is that the technologies and devices currently applied to domestic sewage / urban sewage treatment basically refer to traditional sewage biological treatment technologies, such as A for nitrogen and phosphorus removal. 2 O craft. The problem is ...

AI Technical Summary

Problems solved by technology

The problem is that since organic carbon and nitrogen-containing pollutants in sewage cannot be separated, organic carbon will inevitably be oxidized during aerobic nitrification, and only BOD 5 Nitrification can only occur when it drops below 25mg / L

This is not only to reduce BOD 5 The concentration wastes a lot of energy, and leads to the lack of carbon source for denitrification. The denitrification reaction can only be realized through the reflux of the nitrifying liquid, and the reflux of the nitrifying liquid also leads to a large amount of energy consumption.

On the other hand, the existing A 2 O When simultaneously removing nitrogen and phosphorus pollutants, due to the mutual interference between nitrogen and phosphorus removal, it is difficult to obtain high nitrogen and phosphorus removal rates at the same time, especially in the case of insufficient carbon sources in the influent. will be sharper

[0004] Although the removal of phosphorus can be achieved through chemical precipitation, or through technologies such as constructed wetlands, chemical precipitation requires considerable investment in the cost of chemicals and drug delivery systems, and constructed wetlands not only require a higher land area, but also appear in the later stages of operation. Saturation phenomenon, resulting in excessive phosphorus concentration in the effluent

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