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以取自南水北调中线工程的丹江口水库原水作为研究对象,考察了丹江口水库原水中有机物的分子量大小和亲疏水性分子组成规律,并确定了其所适用的强化混凝工艺条件.分离试验表明,丹江口原水中有机物主要以小分子量形式存在.其中,<1 000组分的溶解性有机碳(DOC)和UV254所占比例最大,分别为39.98%和39.10%,且此区间还具有最高的三卤甲烷生成潜能(THMFP)和含氮消毒副产物生成潜能(N-DBPFP).亲疏水性方面,原水中弱疏水性组分含量最高,疏水性有机物的比例用DOC表征时超过80%.强疏水性组分含量最低但是强疏水性组分的THMFP最大,占总量的57.31%,而各组分的NDBPFP则相差不大.混凝试验表明,当采用聚合硫酸铁(PFS,4 mg·L-1)和聚丙烯酰胺(PAM,0.4 mg·L-1)处理丹江口原水时,强化混凝效果最好,可实现较为有效的去除浊度(76.33%)、DOC(25.57%)、UV254(37.78%)及THMFP(23.16%).本研究成果可为南水北调河南受水区既有水厂升级改造与工艺的优化运行提供有效的理论和技术支持.
Taking the raw water of Danjiangkou Reservoir from the Middle Route of South-to-North Water Diversion Project as the research object, the molecular weight and hydrophilicity and hydrophobicity of the organic matter in the raw water of Danjiangkou Reservoir were investigated, and the applicable coagulation conditions were determined.The separation tests showed that the original Danjiangkou The organic compounds in water mainly existed in the form of small molecular weight, of which <1000 was the largest proportion of dissolved organic carbon (DOC) and UV254, accounting for 39.98% and 39.10%, respectively, and also had the highest trihalomethane formation Potential (THMFP) and nitrogen-generating disinfection byproduct (N-DBPFP) .The hydrophilicity and hydrophobicity of raw water were the highest, while the proportion of hydrophobic organic matter was more than 80% when DOC was used.Hydrophobic components The content of THMFP was the highest, accounting for 57.31% of the total, but the content of NDBPFP of each component was the same.The coagulation tests showed that when using PFS (4 mg · L-1) And PAM (0.4 mg · L-1), the coagulation effect was the best, which could effectively remove turbidity (76.33%), DOC (25.57%) and UV254 (37.78% And THMFP (23.16%) .The results of this study may be south Water north of Henan Province by the existing waterworks upgrading and transformation of the process of optimizing the operation to provide effective theoretical and technical support.