工业水处理 ›› 2023, Vol. 43 ›› Issue (3): 172-180. doi: 10.19965/j.cnki.iwt.2022-0438

• 试验研究 • 上一篇    下一篇

除锰细菌的分离鉴定及其固定化除锰研究

尹思雨1,2(), 黄磊1,2, 党俊杰1,2, 邓冬梅1,2()   

  1. 1.广西科技大学生物与化学工程学院, 广西 柳州 545006
    2.广西糖资源绿色加工重点实验室, 广西 柳州 545006
  • 收稿日期:2023-01-06 出版日期:2023-03-20 发布日期:2023-03-21
  • 通讯作者: 邓冬梅 E-mail:Missyyin@126.com;deng-dongmei@163.com
  • 作者简介:尹思雨(1998— ),硕士研究生。E-mail:Missyyin@126.com
    邓冬梅,副教授,博士。E-mail:deng-dongmei@163.com
  • 基金资助:
    广西省自然科学基金项目(2017GXNSFBA198099);广西研究生教育创新计划项目(GKYC202014);大学生创新创业项目(202110594049)

Isolation and identification of manganese removal bacteria and study on its manganese removal by immobilization

Siyu YIN1,2(), Lei HUANG1,2, Junjie DANG1,2, Dongmei DENG1,2()   

  1. 1.College of Biology and Chemical Engineering,Guangxi University of Science and Technology,Liuzhou 545006,China
    2.Guangxi Key Laboratory of Green Processing of Sugar Resources,Liuzhou 545006,China
  • Received:2023-01-06 Online:2023-03-20 Published:2023-03-21
  • Contact: Dongmei DENG E-mail:Missyyin@126.com;deng-dongmei@163.com

摘要:

自含锰土壤中筛选得到2株具有除锰能力的革兰氏阳性菌S1、S2,比对16S rRNA序列结果,推测2株细菌可能为巨大芽孢杆菌(Baciulls megaterium)和嗜麦芽寡养单胞菌(Stenotrophomonas maltophilia)。在质量浓度为260 mg/L的Mn2+培养基中培养6 d后,2株细菌对Mn2+的去除率均可达95%以上。扫描电镜能谱(SEM-EDS)分析、X射线衍射(XRD)分析表明这2株细菌是通过将Mn2+转化为MnCO3实现对Mn2+的去除。采用海藻酸钠和活性炭作为包埋剂将菌体制成固定化微胶囊,在含锰废水Mn2+质量浓度为150 mg/L时胶囊固定菌的除锰率远高于游离菌相应的值,利用正交实验优化胶囊固定菌的除锰条件后菌株的除锰率均高于96%,3轮循环除锰实验后胶囊固定菌仍有较好的除锰率,可见胶囊固定菌具备一定的重复利用性能。

关键词: 除锰细菌, 包埋固定化, 含锰废水, 正交实验

Abstract:

Two Gram-positive bacteria S1 and S2 with manganese removal ability were screened from manganese-containing soil,and the comparison of 16S rRNA sequences showed that the two bacteria might be Baciulls megateriumStenotrophomonas maltophilia. The removal rate of Mn2+ could reach more than 95% after 6 days of culture in the medium with the mass concentration of Mn2+ of 260 mg/L. Scanning electron microscopy energy dispersive spectroscopy (SEM-EDS) and X-ray diffraction (XRD) analysis showed that the two bacteria could remove Mn2+ by transforming Mn2+ into MnCO3. Sodium alginate and activated carbon were used as embedding agents to prepare immobilized microcapsules,when the mass concentration of Mn2+ in manganese-containing wastewater was 150 mg/L,the manganese removal rates of capsule-immobilized bacteria were much higher than those of free bacteria. The manganese removal rates could reach 96% after optimizing the manganese removal conditions of immobilized bacteria in capsules by orthogonal test. After three rounds of circulating manganese removal experiments,the immobilized bacteria in capsules still had a good manganese removal rates. It could be seen that the immobilized bacteria in capsules have certain reusability.

Key words: manganese-removing bacteria, embedding immobilization, manganese-containing wastewater, orthogonal test

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