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为探讨东江水中引起超滤膜污染的成分及其污染机理,分别于旱季(11月底)和雨季初期(3月底)对东江水进行超滤膜污染试验,分析原水、超滤出水及化学清洗液亲疏水性及分子质量分布等水质特性,并采用膜堵塞模型对膜污染数据进行拟合.高效液相色谱(HPSEC)联合分峰技术(peak fitting)对水质进行分析发现,东江水中有机物的主要组分为生物聚合物(98 ku)、腐殖质(1 200 u)、腐殖质基本单元(610 u)及低分子中性物质(270 u).尽管雨季时东江水的生物聚合物和腐殖质组分较旱季时有所增多,两时期试验中的主要膜污染物质都是具有亲水性的生物聚合物及低分子中性物质.膜堵塞模型拟合膜污染过程的结果表明,生物聚合物在膜表面形成滤饼层及低分子中性组分标准堵塞(窄化膜孔)导致膜污染.
In order to explore the composition of ultrafiltration membrane and its pollution mechanism in Dongjiang water, the Dongjiang water was subjected to the ultrafiltration membrane pollution test in the dry season (end of November) and the early rainy season (end of March) respectively. The raw water, ultrafiltration effluent and chemical cleaning solution Hydrophilicity and hydrophobicity, molecular mass distribution and other water quality characteristics, and the membrane fouling model was used to fit the fouling data.The analysis of water quality by high performance liquid chromatography (HPSEC) combined with peak fitting showed that the main groups of organic matter It is divided into biopolymer (98 ku), humus (1 200 u), basic humus unit (610 u) and low molecular neutrals (270 u). Although the Dongjiang water biopolymer and humus components are drier The membrane fouling substances in both experiments are all hydrophilic biopolymers and low molecular weight neutral substances.The results of membrane fouling model fitted with membrane fouling process showed that the biopolymer formed on the membrane surface Filter cake layer and low molecular weight neutral standard blockage (narrow pores) lead to membrane fouling.