高通量下超滤膜水厂应急除藻试验研究.pdfVIP

2010 年全国给水排水技术信息网年会论文集  高通量下超滤膜水厂应急除藻试验研究 袁哲 陈卫 陶辉 陈亮 （河海大学环境学院，南京 210098） 摘 要 为解决夏季高藻期超滤膜水厂在控制膜污染和提高产水量上的矛盾，保证水厂运行稳定和水质 安全，进行以浸没式超滤膜为核心的组合工艺中试试验。结果表明：采用高锰酸钾预氧化与混凝沉淀可以 有效降低藻数目，超滤可以完全去除藻细胞。适量的高锰酸钾投加量可使跨膜压差降低，但过高的投加量 会使水中有机物成分发生变化，使膜污染加剧，最佳投加量为 1.0mg/L。增加膜表面气冲频率可以在不影响 产水率的同时有效提高膜稳定运行的通量达 20%。组合应急工艺不会导致水厂运行成本大幅上升。 关键字 超滤膜 除藻应急 高锰酸钾 跨膜压差 运行成本 Study on emergency algae removal under high flux in an ultrafiltration waterplant Yuan Zhe ,Chen Wei, Tao Hui,,Chen Liang. (College of Environment Hohai University, Nanjing 210098, China) Abstract ：To solve the ultrafiltration water plant’s contradiction of high flux and membrane fouling in summer when algae was high, and ensure the water plant security and stable, a pilot testing which using immersion membrane as the core of combined process was carried on. The results showed: pre-oxidation using potassium permanganat and coagulation could efficiently reduce the number of algae, ultrafiltration could totally remove algae cells. Appropriate amount of potassium permanganate dosage could reduce the transmembrane pressure, while exorbitant dosage made organic matter variety which increased membrane fouling, the best amount of potassium permanganate was 1.0mg/L. Increasing the frequency of membrane surface’s air impact was able to enhance the stable operating flux by 20% while didn’t affect the water producing rate. Combined emergency process would not lead to significant increase in water plant operation costs. Keywords: ultrafiltration membrane; algae emergency; potassium permanganate; transmembrane pressure; operation cost 随着饮用水卫生标准的提高，常规水处理工艺 核心的组合工艺进行中试，