| 乙二胺四乙酸(EDTA)生物降解特性 |
| 摘要点击 1451 全文点击 1888 投稿时间：2000-07-16 |
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| 中文关键词 EDTA 共基质 厌氧间歇试验 瓦呼仪 活性污泥法 |
| 英文关键词 EDTA co-substrate anaerobic batch reactor Warburg respirometer activated sludge |
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| 中文摘要 |
| 研究EDTA作为单一碳源以及在乙酸钠、葡萄糖共基质条件下EDTA的厌氧、好氧生物降解特性.静态试验厌氧采用厌氧间歇试验法,好氧采用瓦呼仪测试法.单基质条件时,好氧、厌氧情况下EDTA均难以生物降解;而共基质可促进EDTA降解.动态试验采用活性污泥法,结果表明:污泥经过30d的驯化,EDTA去除率可达到50%左右,加入10mg/L乙酸钠,HRT=160,EDTA去除率可达到80%;当HRT=20h,EDTA去除率可达到92.5%～95.1%.污泥龄是影响EDTA降解的主要因素.乙酸钠本身易生物降解,同时它与EDTA具有相似结构,这种官能团共享促进了EDTA的生物降解.乙酸钠的加入还改善了污泥性能. |
| 英文摘要 |
| Aerobic and anaerobic degradability of Ethylenediaminetetraethylene acid(EDTA)were measured on Warburg respirometer and anaerobic batch reactors.Biodegradation of EDTA as a single substance was poor,but biodegradation of EDTA with co-substrate could be improved.The wastewater containing EDTA can be treated by activated sludge process.The EDTA removal efficiency was 80% under the circumstance HRT 16h and EDTA removal efficiency reached to 92.5%～95.1% when HRT was 20h.The main factor affecting the biodegradability of EDTA is sludge remained time. |
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