Simple precipitation-filtration-air flotation-disinfection, in which three-stage sand filtration is used for filtration; Jet air flotation technology is used in air flotation, the main purpose of which is to remove ammonia nitrogen and protein from seawater, and it has no treatment effect on heavy metals in seawater, and this technology is only used in a small number of seedling fields; Chemical disinfection methods such as chlorine preparation and iodine preparation are mainly used for disinfection, and there are certain drug residues, which have a great impact on seedlings.
AFF- air flotation -MBFB- ultraviolet disinfection of seedling raw water;
AFF- air flotation -MBFB-ACFF- ultraviolet disinfection process, in which AFF directly filters out suspended solids with a diameter greater than 5μm in raw water; Air flotation adopts aerated air flotation process, and heavy metals in seawater are removed by adding heavy metal trapping agent; PACBFB-MBR and ACFF are both environmental hormone treatment technologies, which can effectively remove small molecular toxic organic compounds that are difficult to degrade in water.
Disinfection mainly adopts ultraviolet disinfection or photocatalytic disinfection process, with high disinfection efficiency and no drug residue.
The treatment process of fresh water raw water is similar to that of seawater, except that there is no air flotation section. The removal method of heavy metals is mainly to add heavy metal trapping agent during AFF filtration, and it is also used as a bioflocculant to flocculate organic matter with molecular weight greater than 10000D in water, which is convenient for AFF filtration.
Based on the research results of Seattle Company, Tao Xin Environmental Technology Co., Ltd. was initiated by Dr. She Nian, joined by biochemist Dr. K.B.chipasa and aquatic expert Dr. E.hontoria, and concentrated a research and development team composed of multidisciplinary and professional elites such as biochemistry, ecology and environmental science, mainly developing urban surface water ecological management system, aquaculture complex enzyme system, inorganic membrane separation system and membrane bioreactor. It has won three American patents and the annual invention award of Harvard Business School in 2004, and has achieved fruitful results in many fields, such as river and lake management, industrialized seawater and fresh water recycling aquaculture, aquaculture and so on.