标题: | 有机物对污泥毡澄清池特性及生成潜能之影响探讨 The Effects of Organic Matters on Sludge Blanket Clarifiers Characteristics and Formation |
作者: | 洪嘉蔚 Jai-Wei Hong 黄志彬 Chihpin Huang 环境工程系所 |
关键字: | 高速胶凝澄清池;天然有机物;腐植酸;水杨酸;胶羽;浊度;sludge blanket;NOM;humic acid;salicylic acid;floc;turbidity |
公开日期: | 2003 |
摘要: | 台湾地区污泥毡澄清池产水量约占全台50%以上,但台湾地区水体中因含大量天然有机物以至于降低了污泥毡澄清池对于浊度与有机物的处理效能。虽然污泥毡澄清池对无机颗粒去除之因子在国外早广泛论述,但对于有机物种类和浓度对于污泥毡之影响却相当欠缺,本实验中以腐植酸以及水杨酸添加于人工原水中以模拟天然水体中有机物成分,探讨天然有机物存在下,对于污泥毡澄清池之效能、胶羽性质及泥毡生成之影响。 研究结果发现,在固定之操作参数下,腐植酸存在下污泥毡重量百分率低,污泥脱水性佳,胶羽粒径较大,泥毡生成时间快,且易受水流剪力淘淅,而水杨酸则呈现相反结果,但二者之污泥毡对于浊度去除效果差异不大。而当降低污泥毡混凝剂量时,虽然会使污泥毡生成时间变长,但并不影响出流水浊度变化,影响上澄液出流浊度之最大因子乃污泥毡操作流速,并非混凝剂量,故降低上升流速可获得良好的浊度去除效果。 污泥毡处理程序对于腐植酸等大分子有机物去除效果颇佳,而对于水杨酸等小分子去除效果较差。 Abstract In Taiwan, approximately 50% of the drinking water production relies on sludge blanket clarifiers. Most of the surface water bodies contain a large amount of natural organic matters, which deteriorate the treatment efficiency for turbidity and organic substances. Although sludge blanket clarifiers have been broadly studied, they are mostly on the removal of inorganic particles. Few paid attention to the significance of organic species and their concentrations on the performance of sludge blanket clarifiers. The object of this study was to study the effect of organic compounds on sludge blanket clarifiers. Humic acid and salicylic acid were used to simulate the organic compounds of the natural water. The forming of the sludge blanket, its efficiency and the characteristics of the flocs were examined. Experimental results revealed that in the presence of humic acid, the sludge blanket formed in a shorter period of time, which contained lower solids. It had better dewaterability, with bigger particles. The blanket was much easier to washout. Opposite result was discovered in the presence of salicylic acid. When the coagulant dosage was reduced, longer time was required to form the sludge blanket although no significant effect on the turbidity of the effluent was observed. The most critical operation factor for residual turbidity was the flow rate rather than the coagulant dosage. In addition, sludge blanket clarifier was more efficient for larger organic molecules like humic acid. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT009119506 http://hdl.handle.net/11536/51491 |
显示于类别: | Thesis |
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