农村饮用水工程中浸没式超滤膜工艺的应用

Application of Immersion Ultrafiltration Membrane Process in Rural Drinking Water Engineering

我国南方众多省市,受限于多山的地理环境特征,以及村庄和居民分布散落的特点,市政水厂管网无法做到延伸供给,故只能采取建设分布式供水站的方式,以满足单村供水需求。传统的单村供水站多以三池法,一体化砂滤罐设备等形式建设,但无论三池法,还是一体化砂滤罐设备,核心过滤方式仍然为传统砂过滤,过滤精度较差,对前端絮凝沉淀处理工艺要求严格,出水水质不稳定,并且需要专业的运维管理。而浸没式超滤膜工艺的滤料为超滤膜,过滤精度远高于传统砂滤,对前端絮凝沉淀工艺要求较低。在实际工程化运行中平行对比两种工艺处理出水,发现传统水厂处理工艺出水浑浊度在15 NTU左右,出水细菌总数在2000 CFU/mL左右,而超滤工艺出水浑浊度在0.1 NTU左右,出水细菌总数在15 CFU/mL左右,远优于传统处理工艺,并且超滤工艺自动化程度高,更易实现智能化、无人化管理。

Many provinces and cities in the south,limited by the mountainous geography,and the scattered nature of vllages and inhabitants,the municipal water plant pipe network cannot be extended supply,therefore,only the construction of distributed water supply stations can be adopted,to meet the needs of a single village water supply.The traditional single-village water supply station mostly uses the three-pool method,integrated sand filter tank equipment and other forms of construction,but whether it is the threepool method,or the integrated sand filter tank equipment,the core filtration method is still traditional sand filtration,poor filtration accuracy,the requirements for the front-end flocculation and precipitation treatment process are strict,the quality of effluent is unstable,and professional operation and maintenance management is required.The filter material of the immersion ultrafiltration membrane process is an ultrafiltration membrane,the filtration accuracy is much higher than that of traditional sand filtration,the requirements for the front-end flocculation precipitation process are low.In actual engineering operation,parallel comparison is made between the two processes for treating effluent,it is found that the turbidity of the efluent from traditional water treatment processes is around 15 NTU,the total number of bacteria in effluent is about 2000 CFU/mL.The turbidity of the effluent from the ultrafiltration process is around O.1 NTU,and the total number of bacteria in effluent is around 15 CFU/mL,which is far superior to traditional treatment processes.Moreover,the ultrafiltration process has a high degree of automation,making it easier to achieve intelligent and unmanned management.