生物除磷过程厌氧释磷的代谢机理及其动力学分析

运用充分曝气后的好氧末端活性污泥进行了厌氧释磷实验.结果表明,在厌氧释磷过程中VSS呈现出上升的趋势,而MLSS及灰分均呈现出下降的趋势.当微生物体内的糖原耗尽时,会引起厌氧吸收HAc及释磷过程的中断.得出ΔρPΔρPHB、ΔρGLYΔρPHB、ΔρPΔCOD、ΔρPHBΔCOD各比值的平均值分别为0.48、0.50、0.44、0.92.通过对厌氧吸收HAc及释磷动力学过程进行模拟,得到QHAc,max为164mg·g-1·h-1,QP,max为69.9mg·g-1·h-1,KGYL为0.005,KCOD为3mg·L-1.ΔρPΔCOD与溶液中pH呈明显的线性关系,且得到了二者之间的线性方程.

The metabolic mechanism of anaerobic phosphorus release and its kinetic analysis during biological phosphorus removal process

A series of batch experiments were performed using the excessively aerated sludge from the aerobic unit of the biological phosphorus removal system to investigate themechanism of anaerobic phosphorus release. The results showed that the VSS had an increasing trend, while theMLSS and ashes were reduced during the anaerobic phosphorus release process. But the interruption of anaerobic HAc2uptake and phosphorus2release would be occurred when the glycogen in the phosphorus2 accumulating2organisms was exhausted. Themean ratio of $Q_PP$ Q_PHB, $ Q_GLYP$ Q_PHB, $ Q_PP$COD, $ Q_PHBP$CODwas 01 48, 0150, 0144 and 01 92 respectively. The calibrated kinetic parameters of the HAc2uptake and phosphorus2release model were evaluated as following, Q_HAc,max was 164 mg# g^-1# h^-1, Q_{P, max} was 691 9mg#g^-1#h^-1 , K_gly was 01005, and K_COD was 3mg#L^-1 . An apparently linear correlation was observed between the ratio of $ QPP$COD and pH of the solution, and the equation between them was obtained.