A sewage treatment system

Abstract

The invention relates to a sewage treatment system which comprises a setting tank and an aeration tank, wherein the setting tank is provided with a water outlet trough; the bottom of the water outlet trough is provided with a channel communicated with the aeration tank; the water outlet trough is arranged inside the setting tank and is cylindrical, and the axial line is provided with a rotating shaft; a filter screen capable of rotating around the rotating shaft is horizontally arranged in the water outlet trough; blue algae are fixed on the filter screen; a fan-shaped barrel, which uses the rotating shaft as the axle center and has equal radius to the water outlet trough, is fixedly arranged in the water outlet trough; the edge of the fan-shaped barrel is provided with a rubber band; the upper bottom surface of the fan-shaped barrel and the filter screen are positioned on one horizontal surface; and the fan-shaped barrel is fully filled with an eluate. The heavy metal eluting device is creatively arranged in the sewage treatment system, thereby implementing the cyclic utilization of the adsorbing material, performing collection and concentration on adsorbed heavy metals and laying good foundation for further recycling of heavy metals in sewage.

Description

technical field [0001] The invention relates to a sewage treatment system. Background technique [0002] At present, a general sewage treatment system includes a primary settling tank, an aeration tank and a secondary settling tank connected in sequence. However, the water treated by the general sewage treatment system still cannot be effectively used because it contains a large amount of heavy metals. [0003] Among the many heavy metal wastewater treatment methods, biosorption is one of the most effective methods. The raw materials used for biosorption include bacteria, fungi, algae, a few higher plants and their metabolites, and organic matter such as starch, cellulose, and chitosan. [0004] Many algae have the ability to enrich metals, and their adsorption performance is often higher than that of other organisms. Cyanobacteria are the most widely distributed organisms in the world. They can be found in fresh water, ocean and land. Many species can grow in extreme env...

AI Technical Summary

Problems solved by technology

[0012] The outstanding advantage of the cross-linking method is that it can obtain a high cell density, but it cannot be widely used due to the lack of good mechanical strength

The immobilization operation of the adsorption method is simple, the conditions are mild, and the carrier can be regenerated; but the binding force between the cells and the carrier is weak, so the stability of the operation is not good

The embedding method has good comprehensive performance, high catalytic activity retention and viability, and the embedding can be applied flexibly in reaction engineering (including reactor design, operation stability, etc.). The most widely used immobilization method in chemical biocatalyst technology; however, the diffusion resistance of the embedding method is relatively large, which limits the catalytic activity of cells and is not suitable for reactions involving macromolecules