【作者】 柴成山；

【导师】 陶涛；

【作者基本信息】 华中科技大学 ， 市政工程， 2011， 硕士

【摘要】 目前,水体富营养化现象日趋严重,降低出水含磷量已成为各污水厂运行的主要目标。在南方地区,由于城市生活污水浓度较低,影响了污水厂生物脱氮除磷的稳定性。所以,在污水厂尾水COD、SS、NH₃-N达标的基础上,稳定地提高生物除磷的效率很有必要。本研究根据佛山镇安污水处理厂一期工艺实际运行情况,在佛山水业集团新之源污水处理有限公司中试基地模拟了A/O工艺,开展了A/O工艺生物除磷反应过程中试研究,探讨了A/O工艺生物除磷的影响因素及工艺运行参数,初步建立了除磷动力学模型,可以为新建类似污水处理厂及旧厂改造提供参考。中试装置进水采用镇安一期污水厂沉砂池出水,通过调节工艺运行参数能够达到较好的除磷效果。研究结果表明,污泥浓度对总磷去除效果的影响较为明显。在三种污泥浓度（1500mg/L、2500mg/L、3500mg/L）情况下,总磷去除率分别为55.74%、66.30%、55.56%;污泥负荷并没有表现与总磷去除效果严格的相关性,在污泥负荷为0.5⁰.6 kgCOD/（kgMLSS·d）的范围时,总磷去除效果较好,出水总磷基本保持在1mg/L以下;曝气池中污泥体积指数（SVI）值在60mL/g左右波动,污泥有较好的沉降性能。通过对中试装置和实际污水厂不同厌氧好氧停留时间比的分析得出,停留时间比为1:1时的除磷效果较停留时间比为1:3和2:3时更为稳定;在三种停留时间比下,出水COD和氨氮均达到了城镇污水处理厂污染物排放标准一级A标准（GB18918-2002）。厌氧池两点配水较一点进水时能达到更好的总磷去除率,可通过多点配水的方式提高污水厂除磷效果。通过开展A/O生物除磷工艺动力学分析,建立了厌氧释磷与好氧吸磷动力学模型,推导出工艺底物去除速率常数,并根据镇安污水厂一期工艺实际运行数据进行了模型验证。更多还原

【Abstract】 With The growing phenomenon of eutrophication, reducing effluent phosphorus content become the main objective of wastewater treatment plant operation. Especially in the south of China, the stability of nitrogen and phosphorus removal of wastewater treatment plant was affected because of the lower concentration of municipal sewage.A/O pilot-plant process was analoged in XinZhiYuan wastewater treatment Co., Ltd Foshan Water Group.The A/O process’s operation parameters and its’influencing factors was studied combined with the practical operation of Foshan Zhen’an wastewater treatment plant.The grit chamber effluent of the first period Zhen’an wastewater treatment plant was used by pilot plant water, achieving good phosphorus removal by adjusting the operation of the system parameters. The results showed that the effect of sludge concentration on the impact of phosphorus removal is significant. In the three sludge concentration (1500mg / L, 2500mg / L, 3500mg / L) case, the TP removal rates were 5.74%、66.30%、55.56%; Sludge Loading did not show a strict positive and negative ratio with TP removal, the result of phosphorus removal is better when the sludge loading’s range is 0.5 ~ 0.6 kgCOD / (kgMLSS·d), the effluent TP concentration remained below 1mg / L; The sludge volume index (SVI) value in 60mL/g fluctuations around, sludge have good settling characteristics.Through the pilot plant and the actual wastewater treatment plant fed with different Hydraulic Retention Time(HRT) ratio of aerobic and anaerobic we conclude that the effect of phosphorus removal is more stable when is 1:1 than the HRT ratio are 1:3 and 2:3; in this three HRT ratios case, both effluent COD and ammonia nitrogen reached a municipal wastewater treatment plant emission standards Grade A standards(GB18918-2002). Better phosphorus removal was achieved when using two anaerobic distributary than one anaerobic distributary, phosphorus removal of wastewater treatment plant can be improved by multi-point distribution. Anaerobic phosphorus release and aerobic phosphorus uptake dynamics model were established and the substrate removal rate constant was derived by analyzing the A/O biological phosphorus removal process dynamics, which was validated by the datas of the First Period Zhen An Wastewater Treatment Plant.更多还原