污水处理厂多级AO工艺模拟诊断  

Simulated Diagnosis for Multi-Stage AO Processes of WWTP

作　　者：吴宇涵 郭毅 刘伟岩 段宇 荣保维 葛赛赛 WU Yuhan;GUO Yi;LIU Weiyan;DUAN Yu;RONG Baowei;GE Saisai(Beijing Enterprises Water GroupInvestment Co.,Ltd.,Beijing100102,China;Beijing Dao Xianghu Purification Investment Co.,Ltd.,Beijing100000,China)

机构地区：[1]北控水务<中国>投资有限公司,北京100102 [2]北京稻香水质净化有限公司,北京100000

出　　处：《净水技术》2022年第10期61-68,共8页Water Purification Technology

摘　　要：自国际水协组建活性污泥模型研究组以来,陆续推出了ASM1、ASM2d、ASM3等模型,极大推动了污水生物处理动力学的发展,同时污水处理数学模拟已逐渐应用于水处理行业的设计、提标改造、运行管理等方面。采用GPS-X模拟软件构建北京某污水处理厂多级AO工艺模型,应用校正后的模型对污水处理厂运行问题进行诊断,同时提出运行优化方案并进行模拟预测和边界条件探寻。结果表明,进水C/N在4~8时,三级进水分配比为5∶4∶1,污染物浓度降解效率较高,但也需要依靠化学药剂的投加实现磷达标排放;改变化学药剂投加点(由缺氧二末端调整至好氧三末端),出水TP平均质量浓度下降0.1 mg/L;相较原工况,此时25%FeCl_(2)可节约489 kg/d。不同水温条件下的最大进水水量能力结果显示,20℃时三级AO工艺的抗冲击负荷能力较强,当进水流量为设计水量的1.75倍达到系统可承受最大负荷,此时必须提高三段DO质量浓度到3.0 mg/L,出水氨氮方可达标;而低温(15℃)模拟显示,正常负荷工况也需DO质量浓度为3.0 mg/L,此时不建议超负荷运行,可能情况下建议降低负荷。Since the International Water Association established the activated sludge model research group,it has successively introduced models such as ASM1,ASM2d,and ASM3,which have greatly promoted the development of wastewater biological treatment dynamics.At the same time,the mathematical simulation of wastewater treatment has been gradually applied to the design,upgrading and operation management in WWTPs.Building the multi-stage AO process model of a WWTPs in Beijing by GPS-X,and the corrected model was used to diagnose the operation problems.And the operation optimization plan was proposed and simulated prediction and boundary conditions were explored.The results showed that when the influent C/N was 4~8,the three-stage influent distribution ratio was 5∶4∶1,and the pollutant concentration degradation efficiency was high,but it also need to rely on the addition of chemical dosing to achieve standards;continue to change the chemical dosing point(adjust from the end of anoxic 2 to the end of aerobic 3),the effluent TP will drop by an average of 0.1 mg/L;compared to the original operation conditions,this condition could save 489 kg/d for 25%FeCl_(2).The results of the maximum inflow capacity under different water temperature conditions were shown as follows,when the influent load was 1.75 times of the design flow to reach the maximum load that the system could withstand,the threestage dissolved oxygen must be increased to 3.0 mg/L,and the effluent ammonia could reach the standard.The low temperature(15℃)simulation showed that DO=3.0 mg/L was also required under normal load conditions.At this time,overload operation was not recommended,and it was recommended to reduce the load when possible.

关 键 词：污水处理厂 数学模拟 多级 AO 进水分配 进水负荷 溶解氧 运行优化 

分 类 号：X703[环境科学与工程—环境工程]