Panswad Thongchai, Tongkhammak Napaporn, Anotai Jin
Department of Environmental Engineering, Chulalongkorn University, Bangkok, Thailand.
J Environ Manage. 2007 Jul;84(2):141-5. doi: 10.1016/j.jenvman.2006.05.013. Epub 2006 Sep 18.
The intracellular phosphorus content of phosphorus-accumulating organisms (PAO) was determined based on a stoichiometric equation and phosphorus balance for an enhanced biological phosphorus removal system fed with different P:COD ratios. The data indicated that a higher P:COD feeding ratio could significantly promote the growth of PAO. As the P:COD feeding ratio increased from 0.02:1 to 0.04:1 and 0.16:1, the phosphorus in the sludge increased considerably from 0.053 to 0.084 and 0.205 mg P (mg VSS(aerobic))(-1), respectively, indicating a dynamic condition in the microbial population. From the calculations, the mass fractions of the PAO, glycogen-accumulating organisms, and ordinary heterotrophs changed from 0.10-0.15, 0.83-0.88, and 0.02 at 0.02:1 to 0.19-0.28, 0.70-0.79, and 0.02 at 0.04:1 and to 0.478-0.71, 0.26-0.50, 0.03 at 0.16:1 P:COD feeding ratios, respectively. Despite the variation in microbial diversity, the calculated phosphorus contents of the PAO at all P:COD feeding ratios were consistent between 0.241 and 0.378 mg P (mg VSS(PAO))(-1). The initial specific phosphorus release and uptake rates were 84.7-167.9 mg P (g VSS(PAO))(-1)h(-1) and 52.8-90.0 mgP (g VSS(total))(-1)h(-1), respectively.
基于化学计量方程和磷平衡，测定了在不同磷与化学需氧量（P:COD）比值进水条件下强化生物除磷系统中聚磷菌（PAO）的细胞内磷含量。数据表明，较高的进水P:COD比值能显著促进聚磷菌的生长。当进水P:COD比值从0.02:1增加到0.04:1和0.16:1时，污泥中的磷分别从0.053显著增加到0.084和0.205 mg P（mg VSS（好氧））⁻¹，这表明微生物群落处于动态变化中。通过计算，聚磷菌、糖原积累菌和普通异养菌的质量分数在P:COD为0.02:1时分别为0.10 - 0.15、0.83 - 0.88和0.02，在P:COD为0.04:1时变为0.19 - 0.28、0.70 - 0.79和0.02，在P:COD为0.16:1时变为0.478 - 0.71、0.26 - 0.50和0.03。尽管微生物多样性有所变化，但在所有进水P:COD比值下计算得出的聚磷菌磷含量在0.241至0.378 mg P（mg VSS（聚磷菌））⁻¹之间保持一致。初始比磷释放速率和比磷吸收速率分别为84.7 - 167.9 mg P（g VSS（聚磷菌））⁻¹ h⁻¹和52.8 - 90.0 mg P（g VSS（总量））⁻¹ h⁻¹。
