| 海洋硫酸盐还原菌群处理烟气脱硫废水 |
| 摘要点击 2403 全文点击 2291 投稿时间：2008-02-21 修订日期：2008-04-19 |
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| 中文关键词 烟气脱硫 硫酸盐还原菌 嗜盐 最佳生长条件 |
| 英文关键词 biological flue gas desulfurization sulfate reducing bacteria halophilism optimal growing conditions |
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| 中文摘要 |
| 针对高盐硫酸根废水的特性，从海底沉积物中富集得到1个硫酸盐还原菌菌群SRB-2，并研究了盐度、温度、pH值、碳源、硫酸根浓度和铁形态对其活性的影响.结果表明，SRB-2为嗜盐中温硫酸盐还原菌群, 可以利用乙醇及乳酸为单一碳源，最佳生长温度为30～40℃，最佳生长pH值为7.4～8.3，SRB-2菌群能够在硫酸根浓度为5 200 mg/L或盐度为60 g/L的条件下正常生长，还原铁粉对该菌群还原硫酸根的能力具有加强作用，而二价铁离子则抑制细菌活性.扫描电子显微镜及光学显微镜对菌体形态研究发现，在反应器填料表面，该菌群中有大量短竿状及螺旋状细菌黏附，而在底部，主要为表面覆盖大量黑色粘稠物质，由短竿状细菌组成，推测其可能是菌种SRB-2-64（GenBank 序列号：EU167911）的堆积. |
| 英文摘要 |
| An SRB community (SRB-2) was enriched from marine sediment for the treatment of sulfate-rich wastewater of high salinity, and the effect of salinity, temperature, pH value, carbon source, concentration of sulfate and the form of Fe on the activity of SRB-2 was studied. The results show that SRB-2 is a halophilous and moderately mesophilous SRB community. The optimal conditions for its growth are as follows: temperature of 30-40℃ and pH value of 7.4-8.3; it can endure 5 200 mg/L SO2-4 and 60g/L NaCl. Zero-valent Fe can promote the reductive activity of SRB-2, while Fe2+ inhibits that. SEM and optical microscopic measurements indicate many rod-shaped and spiral bacteria on the surface of padding in reactor and black sticky substance composed of rod-shaped bacteria on the bottom of reactor. This sticky substance might be cumulus of culture SRB-2-64 (GenBank accession number: EU167911). |
