Study On Eutrophication Process Of The Surface Water In Sunan Area And The Effects Of LAS On Algae

This paper report the pollutant sources and their discharging amounts in Sunan area, the data show that the wastewater from life animal & poultry manure and urine farmland is most serious, and TP TN and CODCr are the mainly pollutants. The eutrophication is severe increasingly and the management of pollutant sources is no time to delay.Simulating the static rivers of Sunan area and Taihu shallow lake.l. Experimenting on increasing nutrition without sediment. The results show that: when the quantity of adding phosphorus (P) is more than 1.2mg/L ,the appearance of water furface is changed and the viscosity of water and hubble with algae is increased ,which is the symptom of water bloom . What's more, the kind of algae is changed. 2.Study the P-release and algae growth under a series of thickness sludge and different manner of adding sludge. From the results, the different sludge thickness and manners of adding sludge leads to different P-release from the sludge. The sludge accelerates the algae growth. This gives scientific reference to dredging up sludge.According to the severe letting of life wastewater in Sunan area, we study nutrition and detergent's impact on algae. The results show that the algae can remove the 65% of TN and 70% of TP, this show that algae have the ability to purify the wastewater. Linear Alkyl Sulfonate (LAS) restrain the growth of algae , have toxicity on algae, it can be proved by algae shape and quantity H2O2 in it's body. The toxicity increases with the concentrate of LAS, so we should pay attention to detergent in the water.