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为研究在低水力负荷下培养的好氧颗粒污泥的破胞释磷特性,以厌氧颗粒污泥为接种污泥,使用SBR反应器在水力负荷为0.4~1.02kg/(m~3·d)的条件下培养具有脱氮除磷能力的好氧颗粒污泥,设置静置、热解、酸解、碱解和搅拌五种条件,分析每种条件下其上清液中磷氮浓度的变化趋势并得出最佳释磷条件。结果表明,在静置条件下PO_4~(3-)-P净增长可达到5.02mg/L;热解条件下在60℃时PO_4~(3-)-P净增长可达到36.057mg/L;酸解条件下当pH=3时PO_4~(3-)-P净增长可达到12.097 mg/L;碱解条件下pH=10时PO_4~(3-)-P净增长可达到19.732mg/L;搅拌条件下在100r/min时PO_4~(3-)-P净增长可达到约23.641mg/L。对比分析五种不同条件可知,温度和碱解对低水力负荷下培养的好氧颗粒污泥破胞释磷的影响最大。研究成果为减少污泥量及磷的资源回收提供了理论依据。
In order to study the characteristics of the aerobic granular sludge cultured under low hydraulic load, the anaerobic granular sludge was used as inoculation sludge, and the SBR reactor was used to treat the sludge with hydraulic load of 0.4 ~ 1.02kg / (m ~ 3) d) under the conditions of aerobic granular sludge with nitrogen and phosphorus removal ability to set the static, pyrolysis, acidolysis, alkaline hydrolysis and stirring five conditions, the supernatant under each of the conditions of phosphorus and nitrogen concentration The trend of change and draw the best phosphorus release conditions. The results showed that the net growth of PO_4 ~ (3 -) - P could reach 5.02mg / L under static condition and the net growth of PO_4 ~ (3 -) - P reached 36.057mg / L at 60 ℃ under pyrolysis condition. Under the condition of pH = 3, the net growth of PO_4 ~ (3 -) - P could reach 12.097 mg / L under the condition of pH = 3. The net growth of PO_4 ~ (3 -) - P at pH = 10 under alkaline solution could reach 19.732 mg / L The net growth of PO_4 ~ (3 -) - P at 100r / min could reach about 23.641mg / L with stirring. Comparing and analyzing five different conditions, we know that temperature and alkali solution have the greatest influence on the release of phosphorus by aerobic granular sludge cultured under low hydraulic load. The research results provide a theoretical basis for reducing the amount of sludge and the recovery of phosphorus resources.