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Highly Efficient Treatment System of Wastewater Including Recalcitrant Substances Utilizing Membrane Separation Process

利用膜分离工艺高效处理含有顽固物质的废水系统

基本信息

批准号：
06680537
负责人：
OZAKI Hiroaki
金额：
$ 0.32万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

项目摘要

The characteristics of leachate from domestic waste landfill site and the leachate treatment using membrane separation process are investigated and discussed. The main results obtained are as follows.1. The leachate includes recalcitrant substances measured as COD,nitrogen compounds and high concentrations of inorganic salts. The 45% of COD in the leachate remaind in the effluent when the leachate was treated by a conventional process combined with activated carbon plant. The composition of this residual COD is still uncertain. The T-THM formation ability was not reduced in the conventional treatment process searched in this research.2. Reverse osmosis (RO) could separate almost all pollutants in the leachate and reduce the T-THM formation ability. However, the process has a disadvantage of membrane fouling, probably responsible for silica in the leachate.3. Low pressure reverce osmosis (LPRO) is an effective leachate treatment process providing high product of permeation water and comparatively high rejection of solutes except for nitrogen compounds. The combined process with biology (oxidation, nitrification and denitrification) and LPRO is more effective than a conventional leachate treatment process.4. The solute permeability in LPRO memmbrane depends on the charge of memmbrane and ions in many cases. The divalent cations provided lower rejection of coexistent cations in mixed solutions system than that of the cations in single solution system.

对生活垃圾填埋场渗滤液的特性及膜分离工艺处理渗滤液进行了研究和探讨。主要研究结果如下：1.渗滤液包括以COD、氮化合物和高浓度无机盐测量的难降解物质。采用常规工艺与活性炭厂联合处理渗滤液，渗滤液中45%的COD被截留在出水中。这种残余COD的组成仍然不确定。在本研究所探索的常规处理工艺中，T-THM的形成能力没有降低.反渗透（RO）可以分离渗滤液中几乎所有的污染物，并降低T-THM的形成能力。然而，该工艺存在膜污染的缺点，可能是渗滤液中二氧化硅的原因.低压反渗透技术是一种高效的渗滤液处理工艺，具有渗透产水率高、除含氮化合物外的溶质截留率高的特点。生物（氧化、硝化、反硝化）与LPRO的组合工艺比传统的渗滤液处理工艺更有效. LPRO膜的溶质渗透性在很多情况下取决于膜的电荷和离子。二价阳离子在混合溶液体系中对共存阳离子的截留率低于单一溶液体系。