Algae-laden water separation process for scale and engineered treatment of high concentration algae slurry

Abstract

The invention relates to an algae-laden water separation process for scale and engineered treatment of a high concentration algae slurry, which comprises the step (1) of algae-laden water separation process and the step (2) of dewatering process, wherein in the step (1) of algae-laden water separation process, the algae slurry requiring to be processed is pumped in an algae slurry pool and then is pumped into a pipeline coagulation device, then the coagulation reaction is carried out on the algae slurry and a coagulant, and the obtained product is input into a secondary air floatation separation pool to carry out the algae-laden water separation; and in the step (2) of dewatering process, algae scums generated in the step (1) is scraped by a slag scraper into a scum tank and then flows into an algae slag pool, the algae slags are pumped into a high-speed shearing device by the pipeline, and then the product enters a horizontal screw sedimentation centrifuge to carry out dewatering. The invention has the advantages that adoption of the algae-laden water separation process can establish an algae-laden water separation station, remove more than 95 percent of algae in the high concentration algae slurry, take out nitrogen and phosphorus in the water to achieve the aim of purifying the water, solve the embarrassing situation that the blue-green algae cannot be treated after being salved, and form the scale and engineering treatment of the salved blue-green algae; the effluent water is clean and clear; and the algae-laden water separation process can effectively prevent and treat the water eutrophication and is very beneficial for ecological restoration.

Description

technical field [0001] The invention relates to a large-scale and engineered algal water separation process for treating high-concentration algae slurry. Background technique [0002] Studies have shown that eutrophication of water bodies is an important sign of lake and reservoir pollution, and the production of cyanobacteria "water blooms" is an important sign of eutrophication of lakes and reservoirs. In my country, the degree of eutrophication of lakes and reservoirs is becoming more and more serious. "Water blooms" appear frequently, spread year by year, and last for a long time, seriously restricting the sustainable development of society and economy around the waters. [0003] Through years of experience in cyanobacteria control combined with theoretical research and analysis, it has been recognized that mechanical salvage is the only effective method of cyanobacteria control measures that does not have a major impact on lake ecology at this stage. In recent years, t...

AI Technical Summary

Problems solved by technology

The mechanically salvaged cyanobacteria pulp generally has a solid content of 0.5-1.5%, and the appearance is thick and sticky liquid. It is difficult to achieve solid-liquid separation and dehydration and volume reduction by general filtration or flocculation separation, and the disposal efficiency is low.

At present, most of the mechanically salvaged blue-green algae are disposed of near the shore, which not only takes up a lot of land, but also pollutes the surrounding environment and groundwater of the stacking site after the blue-green algae dies and decays.

Existing devices and technologies for controlling cyanobacteria, such as the air floatation cyanobacteria treatment ship technology, can treat low-concentration cyanobacteria, and are only suitable for local waters where the degree of enrichment of cyanobacteria blooms is not high, and cannot form large-scale, engineering, treatment and salvage of cyanobacteria , can not meet the needs of dealing with a large number of mechanized salvage of blue-green algae

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