"Algae water separation" integrated device put into Erhai environmental protection treatment

On the morning of September 22, with 2 national invention patents and 8 utility model patents, the "algae-water separation" integrated device developed by the Institute of Hydrobiology of the Chinese Academy of Sciences was put into the Erhai Lake environmental protection treatment at Taoyuan Wharf in Dali City. This new technology for treating cyanobacteria blooms-"graphene micro-flocculation algae water separation technology" can continuously collect and treat cyanobacteria throughout the growth cycle, thereby effectively controlling the growth of cyanobacteria blooms.

It is understood that cyanobacteria, also called blue-green algae bacteria, are the earliest, most widely distributed, and most adaptable photosynthetic autotrophs on the earth. When the eutrophic water body is at a higher temperature, the algae dominated by cyanobacteria will proliferate in large quantities, floating on the water surface or gathering in the upper layer of the water body in a short time, forming a layer of cyanobacteria with a higher density of algae and a larger area. Water quality has a greater impact.

In the past, most of the treatment of cyanobacteria blooms were carried out after their outbreaks. At this time, the breeding and spreading of cyanobacteria has already caused some damage to the regional environment. Compared with the traditional algae fishing process, this new technology has the advantages of small investment (compared to the traditional deep well air flotation process, saving more than 60% of investment), high efficiency (compared to the traditional deep well air flotation process, the efficiency is increased by 200%), and the processing cost is low ( Compared with the traditional deep well air flotation process, the water treatment cost per ton is reduced by 50%) and other comprehensive advantages.

The technical route can be expressed as: the algae water is sucked by a submersible pump and added with medicine, and then enters the patented algae water separator after rapid coagulation, so that the algae water is completely separated, and the obtained clear water is directly discharged into the lake and separated The high-concentration algae residue water is transported into a patented algae slurry concentration device, and the water is further separated. The moisture content of the obtained algae mud is less than 95%. The separated clean water is simply processed and then returned to the front end of the algae water separator. Circulation separation, the obtained algae mud is pressed by the algae residue pump into the screw press, the moisture content of the algae mud after pressing is further reduced to less than 90%, and it can be transported in low-cost bags; the waste water after the pressing is returned after treatment The front end of the algae water separator is cyclically separated.

And its most notable feature is that it can be collected and treated continuously during the growth cycle of cyanobacteria, and is not affected by the density of algae. It can operate around the clock, and therefore can effectively control the bloom of cyanobacteria.

It is foreseeable that besides Erhai Lake, this new technology will be widely used in the future nationwide lake management, river management and other fields. It will play a huge role and show huge economic benefits!