污泥转移SBR工艺动力学研究

发布时间：2017-12-31 06:08

本文关键词：污泥转移SBR工艺动力学研究　出处：《苏州科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：污泥转移SBR工艺作为新型的强化除磷工艺,克服了传统SBR工艺容积利用率不高、除磷效果不稳定性的缺点,通过污泥在主反应器与生物选择器间的转移,成功实现了对聚磷菌筛选,除磷效果较好。本文以污泥转移SBR工艺为研究对象,主要量化了泥龄、污泥转移量、C/P、温度、pH值等对除磷影响,同时建立污泥增长动力学方程和释(吸)磷动力学方程,指导反应器的设计、优化和运行。试验结果表明:(1)污泥增长动力学参数为Y=0.402kg MLVSS/(kg COD·d),Kd=0.054d-1,污泥增长动力学方程为:dX/dt=0.402dS/dt-0.054X。?X污泥产量可表示为:?X=0.402Q(S0-Se)-0.054XV。最佳泥龄为14d,此时COD的去除率为90%左右、NH4+-N去除率为89.66%~94.39%、TN去除率为71.45%~74.25%、PO43-去除率为86.88%~92.40%,脱氮除磷效率较高。(2)在污泥转移0%~50%范围内,释磷动力学方程为:dP/dt=ake-kt,式中a=1.14+2×(3.6+29.4R-41R2),k=1.5+0.17×(3.6+29.4R-41R2);吸磷动力学方程为dP/dt=-ake-kt,式中a=4.7+1.9×(4.6+31.5R-43.5R2),k=0.7+0.11×(4.6+31.5R-43.5R2)。(3)短周期内温度在12~30℃,释(吸)磷动力学参数随着温度的上升而变大;长周期内培养温度越低,污泥在同一温度下(24℃±2℃)释(吸)磷动力学参数越大;在处理生活污水时应控制进水pH在7~8、DO控制条件为3~4mg/L,此时释(吸)磷动力学参数处在较高值,污泥具有较好的吸磷能力。(4)进水C/P在45~96,比释磷速率、PHB合成量、释磷量变化稳定并且较高,磷的去除率基本保持在90.82%以上,出水磷低于0.5mg/L。
[Abstract]:The transfer of sludge SBR process as phosphorus removal process enhancement model, to overcome the traditional SBR process volume utilization rate is not high, the phosphorus removal effect of unstable defects, through the sludge in the main reactor and the biological selector transfer between the successful implementation of the screening of phosphorus, phosphorus removal effect is good. The sludge transfer SBR process as the research object mainly, to quantify the SRT, sludge transfer amount, C/P, temperature, pH value on phosphorus removal effect, and establish the sludge growth kinetic equation and release (suction) phosphorus dynamics equation, guiding the design of the reactor, and operation optimization. The test results show that: (1) the sludge growth kinetics parameters Y=0.402kg (kg MLVSS/ COD, D, Kd=0.054d-1), sludge growth kinetics equation is: dX/dt=0.402dS/dt-0.054X.? X sludge production can be expressed as: X=0.402Q (S0-Se) -0.054XV.? The best sludge age was 14d, the removal rate of COD is about 90%, the removal rate of NH4+-N was 89.6 6%~94.39%, the removal rate of TN was 71.45%~74.25%, the removal rate of PO43- is 86.88%~92.40%, nitrogen and phosphorus removal efficiency is higher. (2) in the transfer of sludge in the range of 0%~50%, the phosphorus release kinetics equation is: dP/dt=ake-kt type a=1.14+2 * (3.6+29.4R-41R2), k=1.5+0.17 * (3.6+29.4R-41R2); phosphorus adsorption kinetic equation for dP/dt=-ake-kt, in which a=4.7+1.9 (x 4.6+31.5R-43.5R2, k=0.7+0.11) * (4.6+31.5R-43.5R2). (3) the temperature in a short period at 12~30 DEG C release (suction) P kinetic parameters with the increase of temperature change; long period of training the lower the temperature, the sludge at the same temperature (24 - 2 Deg. C) release (suction) more kinetic parameters of phosphorus large; should control the influent pH in 7~8 in the treatment of domestic sewage, DO control condition is 3~4mg/L, the release of phosphorus (suction) kinetic parameters at a higher value, with better ability of absorbing phosphorus sludge into the water. (4) C/P in 45~96, than the phosphorus release rate, PHB synthesis, phosphorus release amount change stability The removal rate of phosphorus is basically kept above 90.82%, and the phosphorus in the effluent is less than 0.5mg/L.

【学位授予单位】：苏州科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X703

【相似文献】