| 王莹,徐梦迪,陈虎,吕永康.化学通报,2023,86(1):117-122，127. |
| 一株耐盐菌的鉴定及其高盐条件下喹啉降解性能研究 |
| Identification of a salt-tolerant strain and its degradation performance of quinoline under high salinity condition |
| 投稿时间：2022-04-12 修订日期：2022-06-20 |
| DOI： |
| 中文关键词: 高盐有机废水 喹啉 生物降解 |
| 英文关键词:High-salt organic wastewater, Quinoline, Biodegradation |
| 基金项目:山西省自然科学基金项目(20210302124348和202103021223099)、山西浙大新材料与化工研究院研发项目(2021SX-AT004)和山西省重点研发项目(201903D311004)资助 |
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| 中文摘要: |
| 从山西某焦化废水厂的活性污泥中筛选分离出一株耐盐菌株LV4，对其进行鉴定和高盐条件下的喹啉降解性能的研究。通过菌体形态和16S rDNA序列同源性分析鉴定菌株LV4归属于红球菌属（Rhodococcus sp.）。耐盐菌株LV4可在盐度为4%的高盐条件下以喹啉为唯一碳氮源进行生长，并可完全降解初始浓度不高于200 mg/L的喹啉，对应的TOC降解率不低于83.26%，表明菌株LV4在高盐环境中对喹啉具有良好的矿化降解效果。单因素实验结果表明耐盐菌株LV4的最适高盐条件下的喹啉降解温度为30°C、pH为7–8、转速为120 rpm。在高盐环境中耐盐菌株LV4能同时降解喹啉和吡啶，并且吡啶的共存加速了LV4对喹啉的降解，这为高盐废水生物强化处理提供了良好的菌种资源。 |
| 英文摘要: |
| A salt-tolerant strain LV4 was screened and isolated from the activated sludge of a coking wastewater plant in Shanxi. Strain LV4 was identified and its high-salt quinoline degradation performance was also studied. Through the morphological observation and the homology analysis of 16S rDNA sequence, strain LV4 was identified as the genus Rhodococcus sp.. Strain LV4 could use quinoline as the sole carbon and nitrogen source for growth at the salinity of 4%, and completely degrade quinoline when the initial quinoline concentration was not more than 200 mg/L, and meanwhile the corresponding TOC degradation efficiency was not lower than 83.26%, indicating that the strain LV4 has good degradation and mineralization effect on quinoline in high salinity environment. The single factor experiment results showed that the optimum conditions for quinoline degradation under high salinity were 30 oC, pH 7–8 and 120 rpm for strain LV4. Under high salt environment, strain LV4 has dual abilities to degrade both quinoline and pyridine, and the coexistence of pyridine accelerates the quinoline degradation by strain LV4. All these provides a good strain resource for the biological enhanced treatment of high salt wastewater. |
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