SBR中除磷颗粒污泥的培养和A/O及A/A/O颗粒污泥工艺除磷特性研究

Formation of the Phosphorus Removal Granular Sludge and Phosphorus Removal Characteristics of the Anaerobic/Oxic and Anaerobic/Anoxic/Oxic Granular Sludge Process in SBR

以絮状活性污泥为接种污泥,乙酸钠为碳源,在SBR反应器内采用水力筛选的方法进行生物除磷颗粒污泥培养,然后诱导为反硝化聚磷颗粒污泥,探讨2种颗粒污泥除磷特性.结果表明,在厌氧/好氧（A/O）交替运行条件下,82d后培养出生物除磷颗粒污泥,污泥颜色呈淡黄色,粒径为0.5-1.5 mm,沉速为20-30 m/h,含水率为94%,密度为1.043 9,SVI在50 mL/g以下;437d时污泥最大比释磷速率（SRPR）为67.7 mg/（g·h）,最大比吸磷速率（SUPR）为43.2 mg/（g·h）,污泥中总磷的含量（TP/SS）为6.5%;448 d时改变运行条件为厌氧/缺氧/好氧（A/A/O）进行反硝化聚磷试验,653 d时反硝化聚磷颗粒污泥最大SRPR为30mg/（g·h）,最大缺氧SUPR为27.9 mg/（g·h）,TP/SS为6.3%.生物除磷颗粒污泥和反硝化聚磷颗粒污泥具有较强的除磷能力.

Phosphorous removal ＆ denitrifying phosphate uptake of the granular sludge was investigated in this study. Inoculated with flocculation sludge, the granulation of the biological phosphorous removal sludge was realized in a sequencing batch reactor （SBR） fed with sodium acetate by means of hydraulic selection under an anaerobic/oxic alternating operation （referred to as an A/O）. Then the biological phosphorous removal granular sludge was induced into the denitrifying phosphate uptake granular sludge under an anaerobic/anoxic/oxic ahemating operation （referred to as an A/A/O）. The properties of the two kinds of granular sludge were studied. The biological phosphorus removal granular sludge was completed on the 82nd day. The biological phosphorus removal granule sludge showed some characteristics, e.g. pallideflavens in color, 0.5-1.5 mm in diameter, 20-30 m/h in settling velocity, 94% in water content, 1.043 9 in specific gravity, and below 50 mL/g in SVI. The max. specific release phosphorus rate （SRPR）, the max. specific uptake phosphorus rate （SUPR） and the phosphorus content of the MLSS （TP/SS） was 67.7 mg/（g·h）, 43.2 mg/（g·h） and 6.5 % respectively on the 437 th day. On the 448th day the operation of the reactor was changed into A/A/O. The max. SRPR, the max. anoxic SUPR and the TP/SS of the denitrifying phosphate uptake granular sludge was 30 mg/（g·h）, 27.9 mg/（g·h） and 6.3% respectively on the 653rd day. The two kinds of granular sludge had potential to carry out phosphorus removal.