Method applied to sewage treatment system and used for removing heavy metals

Abstract

The invention relates to a method applied to a sewage treatment system and used for removing heavy metals. The sewage treatment system comprises a primary sedimentation tank and an aeration tank, wherein blue-green algae are cultured in the primary sedimentation tank and flow into the aeration tank naturally along with sewage; the blue-green algae refer to filamentous and suspended blue-green algae; the blue-green algae refer to spirulina or anabaena.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a method for removing heavy metals applied in 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 wor...

AI Technical Summary

Problems solved by technology

[0009] At present, some people use cyanobacteria in sewage treatment systems, mainly by cultivating cyanobacteria alone and then putting them into the aeration tank. However, a large number of bacteria and other microorganisms in the aeration tank adhere to the microalgae, which will cause the microalgae to fail to grow or even die. , so that it needs to be put in continuously, and the management cost is high

At the same time, the attached microorganisms will hinder the adsorption of heavy metals in sewage by microalgae, affecting the adsorption efficiency.