有机基质对反硝化除磷效果的影响

文章研究了有机基质对反硝化除磷工艺脱氮除磷效果的影响,实验结果表明:有机基质是影响反硝化除磷效果的重要因素,磷的去除主要在缺氧阶段由反硝化除磷实现。实验保持N、P进水40 mg/L、8 mg/L不变,当COD/P≥31.25时,出水磷浓度小于1 mg/L,去除率大于85%,出水中氨氮和硝酸氮约为0,氮的去除率接近100%,COD的去除率在95%以上;当进水25≤COD/P≤31.25时,出水磷浓度为1~2.4 mg/L,去除率大于70%,氮的去除率接近100%,COD的去除率大于90%;研究结果推断,随着进水有机基质的降低,厌氧池聚磷菌放磷量逐渐减少,缺氧池反硝化除磷量也逐渐降低,二沉池出水磷酸盐含量逐渐升高,反硝化除磷的效率随着有机基质浓度的降低而逐渐降低。

Effect of Organic Matrix on Denitrification Phosphorus Removal

Effect of different organic matrix concentrations on denitrification phosphorus removal was investigated using simulated municipal wastewater.Results showed that organic matrix is an important effect factor for denitrification phosphorus removal,and phosphorus removal was achieved by denitrification in anoxia tank.Under the conditions of nitrogen 40 mg/L and phosphorus 8 mg/L,phosphorus was less than 1 mg/L and its efficiency was over 85% when COD/P was above 31.25,while its efficiency was only more than 70% and effluent phosphorus was 1~2.4 mg/L when COD/P was 25~31.25,while no ammonia nitrogen coupled with a little nitrate were detected in the effluent in different influent conditions.Experimental results indicated that phosphorus release in anaerobic tank and phosphorus uptake in anoxia tank decreased when COD/P decreased,and efficiencies of denitrification phosphorus removal will be decreased with the decrease of organic matrix.