| 耐酸性异养菌的分离及其在制革污泥重金属生物淋滤中的作用 |
| 摘要点击 2370 全文点击 2518 投稿时间：2003-10-18 修订日期：2004-01-13 |
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| 中文关键词 酵母菌 生物淋滤 制革污泥 铬 硫杆菌 |
| 英文关键词 Rhodotorula sp. R30 bioleaching tannery sludge chromium Thiobacillus sp. |
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| 中文摘要 |
| 从制革污泥中分离出一株异养微生物,经鉴定属于红酵母菌属(Rhodotorula sp.)R30, 测定菌株R30的适宜生长pH范围为3～7,但能耐受pH 2.5至1.5的酸性环境,最适生长温度28℃.酵母R30在污泥水溶性有机物(DOM)中培养96h,水溶性有机碳(DOC)从1485mg/L降至345mg/L,菌数达4.8×107mL-1.将污泥预酸化至pH 6.5,在进行污泥的生物淋滤过程中,添加酵母处理与不添加酵母处理的对照相比,淋滤时间减少了4d,淋滤周期显著缩短,在7d的淋滤时间内,重金属Cr的溶出率提高39%. |
| 英文摘要 |
| A heterotrophic microorganism was isolated from sewage sludge, it was identified as Rhodotorula sp.R30. Its optimum pH for growth was 3～7, but it can stand the acidity of pH 2 5～1 5. The optimum temperature was 28℃. When R30 was inoculated in the medium containing dissolved organic matter derived from sewage sludge and incubated for 96 h, dissolved organic carbon in the medium declined from 1485 mg/L to 345 mg/L, and the yeast number was 4.8×107mL-1. It was found through the batch trial that the period of bioleaching could be apparently shorted to 4 days if R30 was inoculated in the bioleaching system. Furthermore, the removal efficiency of Cr in sewage sludge could be enhanced by 39% with compared to the control without inoculating R30. |
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