Investigation and Optimization of UV Disinfection Process in Urban WWTPs at Home
The urban wastewater treatment is a crucial aspect of environmental protection engineering,and the ultraviolet(UV)disinfection process is widely employed in wastewater treatment plants(WWTPs)due to its high efficiency and environmentally friendly.Nevertheless,the UV disinfection process still encounters numerous challenges during practical operation,including issues related to the rationality of disinfection dosage,equipment selection,and maintenance.The presence of these problems not only impacts the operational efficiency of WWTP but also hinders the widespread adoption of UV disinfection technology.Therefore,it holds great significance to systematically investigate the UV disinfection process to enhance their operational and managerial capabilities while optimizing the design of the UV disinfection process.In order to fully understand the problems and influencing factors of UV disinfection process in WWTPs,79 WWTPs using UV disinfection process were selected as research objects in this study.These WWTPs are widely distributed across various geographical environments and treatment scales,covering four regions of southwest,Central,East and South China,including eight provinces and cities in Sichuan,Chongqing,Guizhou,Hubei,Hunan,Henan,Shandong and Guangdong.The treatment scale ranges from several hundred m3/day to 200 000 m3/day,ensuring the representability and universality of the study.The investigation contents include the operating parameters,equipment configuration,maintenance and effluent quality of the UV disinfection process,aiming to fully understand the actual operating conditions and existing problems of the UV disinfection process.According to the survey results,the UV disinfection process can basically meet the requirements of fecal coliform numbers control in the effluent water of urban WWTP,but there are still unreasonable UV disinfection dose,unsuitable equipment selection,inadequate maintenance,etc.In addition,water quality factors such as water quantity fluctuation,suspended solids(SS)and chroma have also been proved to have a significant impact on the UV disinfection effect.Based on the investigation results,this study put forward a series of specific recommendations:the UV disinfection dose should be reasonably adjusted according to the actual water quality and water quantity fluctuation in WWTPs to ensure disinfection effect,and regular maintenance is needed to extend the service life of equipment and maintain disinfection effect.These suggestions not only help to improve the operation efficiency of existing WWTPs,but also provide a reference for the UV disinfection process design of new WWTPs.
万方数据
维普
