Blue-green algae mud pressure filtrate treatment method

Abstract

The invention provides a blue-green algae mud pressure filtrate treatment method, which enables a blue-green algae mud pressure filtrate treatment system to be more stable and efficient, and improves the practical application value of a blue-green algae mud pressure filtrate treatment technology. A blue-green algae mud pressure filtrate treatment method is characterized by comprising the following steps: S3, carrying out pressure filtration on blue-green algae mud with the moisture content of 85-95%, carrying out air stripping process treatment on the produced blue-green algae pressure filtrate, and reducing the ammonia nitrogen concentration in the blue-green algae mud pressure filtrate by 20-40%; S4, adding soluble carbonate into the blue-green algae mud pressure filtrate treated by the air stripping process, and precipating calcium ions; S5, introducing ozone into the blue-green algae mud pressure filtrate obtained after calcium ion precipitation treatment for oxidation; S6, treating the blue-green algae mud pressure filtrate subjected to ozone oxidation through an anaerobic bioreactor (such as an up-flow anaerobic sludge blanket reactor) system; and S7, treating the blue-green algae mud pressure filtrate through an aerobic bioreactor system (such as an A / O water treatment process-membrane bioreactor process).

Description

technical field [0001] The invention belongs to the technical field of cyanobacteria treatment, and in particular relates to a method for processing cyanobacteria mud press filtrate. Background technique [0002] The current method of cyanobacteria treatment is still mainly salvage. The algae water rich in cyanobacteria is transported to the algae water separation station by mechanical means for preliminary dehydration, and concentrated into algae mud with a water content of 85-95% for subsequent treatment. The output of algae mud is huge, and there are many disadvantages if the disposal method of landfill or open storage is adopted. The large amount of free water, organic pollutants and algae toxins contained in the cyanobacterial mud have brought great safety hazards to the surrounding environment of the landfill. At the same time, cyanobacteria mud is extremely perishable and produces stench, which not only seriously affects the quality of the surrounding environment, bu...

AI Technical Summary

Problems solved by technology

Although the effect of solid reduction is remarkable, many problems need to be solved urgently in the process of large-scale application

[0004] The inventors found that the filter press liquid produced during the press filtration process is a potential source of pollution. Cyanobacteria added a large amount of additives during the press filtration process, resulting in high salt content and complex types of the press filter solution; the destruction of the cell structure of the cyanobacteria resulted in the release of a large amount of intracellular organic matter. The content of organic matter in the filter press liquid is high; at the same time, the cyanobacteria mud press filter liquid also has strong biological toxicity, and its biological toxicity has a great impact on the denitrification microorganisms in the biochemical treatment process, resulting in the inability of the denitrification microorganisms to perform the denitrification process normally. , the treatment effect of the whole denitrification process is poor; secondly, the salvage of cyanobacteria has obvious periodic characteristics, and the water quality and water volume of the filtrate fluctuate greatly, which poses a great challenge to the long-term stable operation of the whole process system

Images