Phosphate-accumulating Organisms Screening, Identification And Study Of Function From Food Waste Water

In recent years, major lakes and reservoirs continue to have reported the emergence of the phenomenon of eutrophication. The key factor causing eutrophication is phosphorus, sewage and phosphorus removal is the key to control eutrophication. Biological phosphorus removal is one of the most cost-effective sewage removal technology is the core of biological phosphorus removal PAOs. However, the existing biological nutrient removal technology and face nitrobacteria PAOs in the sludge age on the contradictions, as well as denitrifying bacteria compete with PAOs and other organic problems. At present, a removal and will be able to use the same type of denitrifying bacteria at the same time achieve a new type of nitrogen and phosphorus removal technology - denitrification and phosphorus removal technology has become a research hotspot.To study the denitrifying phosphate accumulating bacteria in biological characteristics, through the absorption of phosphorus testing, nitrate testing and gas origin also metachromatic staining granules and PHB granules auxiliary test, from a food factory in Mudu of Suzhou wastewater discharges from the isolated 3 denitrifying phosphate accumulating bacteria B4, B5 and B6. Identified, respectively, belong to Serratia, Rahnella aquatilis and Acinetobacter.Some of the more important of the non-biological factors such as temperature, pH value of the B4, B5 and B6 strains of growth and efficiency of nitrogen and phosphorus removal. The results showed that at a temperature of 22℃~ 38℃range of strains of growth and the impact on the effectiveness of phosphorus removal is not a great response to nitrogen and phosphorus removal at the optimum temperature is around 30℃, and at room temperature near 22℃, its growth and the effect of nitrogen and phosphorus removal are better. Nitrogen and phosphorus removal and growth of bacteria 3 of the best response to neutral pH values are alkaline side.