【作者】 李立秋；

【导师】 李圭白；

【作者基本信息】 哈尔滨工业大学 ， 市政工程， 2008， 硕士

【摘要】 随着给水水源日益受到污染,传统的常规工艺已难以满足日益严格的饮用水水质标准,寻求新的饮用水处理工艺已成为给水领域最重要的研究课题。超滤膜被誉为21世纪的水处理技术,是替代传统的饮用水处理工艺的最佳选择之一。但超滤膜的截留分子量较大,去除原水中的溶解性有机物的效果较低。为了提高膜去除有机物的效果,在超滤膜前设置高密度沉淀池作为膜前预处理,减轻后续膜工艺的处理负荷。东营市饮用水水源典型特点为浊度低,本论文以东营市饮用水水源黄河口水作为试验用水,研究混凝剂聚合氯化铝(PAC)投药量,阴离子型聚丙烯酰胺(PAM)投加量及投加位置,污泥回流比和粉末活性炭回流投加等些参数对高密度沉淀池处理试验水的影响。对于配制的试验用水进行粉末活性炭吸附试验,研究发现,活性炭对有机物吸附较快,30分钟左右便达到吸附平衡。进一步通过正交试验L9(34)分析了PAC投药量、PAM投药量及投加位置、污泥回流比这四个因素对有机物去除效果的影响大小。试验表明,四因素对有机物去除效果影响由大到小依次为: PAC投加量→PAM的投加量→回流污泥百分比→PAM的投加位置;最佳试验条件为: PAC投加25mg/L,PAM的投加0.10mg/L,回流污泥60%,PAM同时投加于第1个和第3个反应器内,投加量各为0.05mg/L。在此试验参数下CODMn去除率达到60%左右。在上述试验基础上再投加KMnO4(0.4mg/L)后,对有机物的去处率还会提高3%左右。进行中试试验,高密度沉淀池和超滤膜的组合工艺在PAC投加20mg/L, PAM投加0.15mg/L,且PAM投加在反应池末端的工况下,和直接采用超滤膜处理试验水相比表明,有机物去除率由原来(直接超滤)的35%提高到50%。在原水藻类含量较高期间,通过高密度沉淀池和超滤膜的组合工艺对藻类去除效果好于水厂传统工艺对藻类的去除效果。并发现,高密度沉淀池耦合超滤工艺在减轻膜污染方面有很大作用,提高膜除藻率的稳定性。更多还原

【Abstract】 With the serious pollution of drinking water resource,the environmental drinking water treatment Proeesses can not meet the more stringent requirement of the drinking water quality standard. So it has been the most important research subject in the drinking water treatment field to explore new drinking water treatment proeess. Ultra-filtration(UF) proeess was paid more and more attention beeause of the rapid development of membrane in dustry and its high removal effieieney to turbidity and virus.UF teehnology was regarded as“water treatment technology in the 21st Century,It was one of the optimal selections to alternate the conventional drinking water treatment proeesses.However,the dissolvedorganie matter removal effieiency was verylowinrawwater by UF beeause of the high molecular weight cut off of the membrane. so the UF membrane can be combine dused with the eoagulation or powder activated carbon(PAC) to improve the organiesre moval effeet.The improvement effeeton organies removal by Powderaetivatedc ar bonanditsin fluenee on the ultra filtration membrane fluxan dresistanee were the key researeh problems.Drinking water source is typically characteristic of low turbidity in Dongying.The paper which takes Dongying drinking water source water of Yellow River Estuary as test water, study the addition dosage amount and dosing position of coagulant as PAC and PAM anionic. some parameters as the recycle ratio of sludge and the Powdered activated carbon returning addition have effect on the Densadeg dealing with the test water.For testing the preparation of the test water for powdered activated carbon absorption Experimental, the study found, the activated carbon’adsorption of organic matter is fast, about 30 minutes to achieve equilibrium. PAC is not high recycling value by all appearance. Further through Orthogonal L9 (34) Analysis of PAC dosage as well as PAM, the dosing point and the recyle radio of sludge, four factors on the effect of removing organic matter. Tests showed that the four factors on the effect of removing organic as followed:PAC dosage→PAM dosage→recyle radio of sludge→the dosing point of PAM ;the best test conditions: PAC dosage 25 mg/L, PAM of 0.10 mg/L, returning sludge 60%, PAM added at the same time in the first and three reactor, which dosage of 0.05 mg/L. Under this test parameters, the removal rate of CODMn reach 60 percent. On the basis of the above test , adding KMnO4 (0.4mg/L) together, it will improve about 3 percent of removal rate of organic matter .Under the condition as the densadeg combinated with the UF and PAC dosage 20mg/L,PAM added in the end of the tank with dosage 0.15mg/L, the removal rate of the organic matter is raised from 35% to 50%, compared with the test water which is just treated directly by UF.In the raw water with high level of algae, a combination of densadeg and UF on removal of algae is better than the traditional one. And find that: it has a great role inl lightening up the pollute of menbrane through use UF combined with densadeg.更多还原