摘要
污水处理过程中产生的臭气污染会对污水处理厂工作人员及周围环境产生恶劣影响。目前,国内大部分污水处理厂都采用“加盖除臭”的方式,消除对周边环境的影响。为更好地实现除臭效果,有效提升臭气的收集效率是需要重点研究的课题。采用计算流体动力学(computational fluid dynamics,CFD)对污水处理厂生化池[厌氧-缺氧-好氧(AAO)工艺]的臭气收集进行模拟。结果表明,在原工艺结构布局下,存在气体收集流场紊乱、气流量大、臭气收集效率低的问题。根据模拟结果,取消了池体上部的除臭风管,将超高部分开洞联通,并在缺氧区合适位置进行补气,使得池内保持良好气体流态,恶臭气体不产生集聚,收集效率得到很大提升。利用CFD对不同气流组织方案下的补排风效果模拟,可完善管道设计方案,对污水处理厂臭气收集系统设计与运行具有重要的指导意义。
The odor pollution produced in the wastewater treatment process will have a bad influence on the staff in the wastewater treatment plant(WWTP)and environment around.At present,most domestic WWTPs adopt the method of deodorizing with a cover to eliminate the impact on the surrounding environment.Meanwhile,in order to realize a better deodorization result,how to improve the collection efficiency of odor is an important research project.The computational fluid dynamics(CFD)was used to simulate the odor collection of the wastewater treatment pond(AAO process)in this research,the results showed that,under the original process and structure layout,there were some problems such as the turbulent gas flow field,large gas flow and low collection efficiency of the odor.According to the simulation results,the deodorizing duct on the upper part of the pond was canceled,the ultra-high part together by opening some holes were connected,and air supply in the proper location of the anoxic zone was added,so that gas flow maintaining was good in the pond,odor gas did not accumulate,and collection efficiency of odor gas was greatly improved.The CFD model used for the discharge or supply gas stimulation under different airflow organization schemes,which can optimize the pipe design,and has an important guiding significance for the design and operation work of the odor collection system in the WWTP.
作者
鞠庆玲
JU Qingling(Nishihara Environment Protection<Shanghai>Co.,Ltd.,Shanghai 201204,China)
出处
《净水技术》
CAS
2023年第9期176-182,共7页
Water Purification Technology
关键词
污水处理
臭气污染
臭气收集
计算流体动力学
气场模拟
wastewater treatment
odor pollution odorous gas collection
CFD
gas field simulation
