Study On Algae Water Separation Using Coagulation-micro Bubble Air Flotation Process

Eutrophication in lakes ecosystem structure and function degradationLake blue-green algae blooms frequently outbreak, more and more serious water shortage, water quality and cause huge economic losses. Hefei pond algae water separation kosi port USES the independent research and development process, through fishing algae slurry, the coagulatiiong sedimentation, ressurized dissolved air flotation, dehydration algae water separation, water back into the chaohu lake. Pressurized dissolved air gas float while it is possible to realize algae water separation, but need to adjust the dissolving tank pressure, complex operation, the effect is not stable, and the water quality will need to be further improved.Micro/nano bubble is in the field of environmental protection in recent years new technology for outstanding performance. Using micro/nano bubbles coagulation air floatation process in Hefei pond algae water separation Tang xihe port of fresh water and water after fermentation.Study on different coagulants, dosing amount of coagulant and air flotation time on algae removal rate, as well as the impact on water quality.1. The experimental results show that the polyaluminium chloride (PAC) removal effect is very good. With the increase of coagulant dosing quantity, TN, COD, SS, remove the first rise after the fall, the removal rate of TP slowly rising, ammonia nitrogen is decreasing.1. The micro/nano bubbles coagulation air floatation process compared with the traditional capacity gas air flotation process.The micro/nano bubbles coagulation air floatation process fresh algae water the best dosage of coagulant PAC is 24 g/m3, gas residence time for 30 min. the fermentation of algae water coagulant dosage is best for 36 g/m3, gas residence time for 40 min.3. Comprehensive consideration, the fermentation of algae water treatment effect is better than fresh algae water treatment effect, TP, TN and the removal rate of COD, SS, respectively increased by 10%,34%,5%,5%.4. When algae water solid ratio 0.03,the micro/nano air bubbles floatSS and COD removal efficiency; When algae water subsidence ratio 0.20, TP, TN, ammonia nitrogen removal efficiency.