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低温苯胺降解菌固定化菌丝球方法与特性

Keywords: 低温,苯胺,生物降解,菌丝球,固定化

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Abstract:

为了提高低温条件下含苯胺废水的生物处理效率,采用变温驯化法从活性污泥中分离出低温(7℃)苯胺降解菌JH-9,研究了其降解特性及生物质载体固定化方法.结果表明,JH-9属于乙酸钙不动杆菌属,能以苯胺为唯一碳源和氮源。可耐受苯胺质量浓度1000mg/L以上,低温(7℃)下,培养52h对初始质量浓度为150mg/L的苯胺去除率可达100%.以黑曲霉Y3作为生物质载体,采用同时接种霉菌和JH-9细菌的培养固定化方法比先后接种霉菌和JH-9细菌的培养固定化方法获得混合菌丝球的培养时间短,且在相同时间内可固定的细菌量大.混合菌丝球的直径、质量和体积均比空白霉菌菌丝球的大.混合菌丝球对含苯胺废水表现出了较好的降解效能,在15℃下低温培养66h即可将初始质量浓度为150mg/L的苯胺完全降解,固定化后的功能菌(JH-9细菌)仍然保持了原有的活性.由此,本研究提出了同时培养法.此方法将会有效解决传统载体传质效率低、固定生物量低、成本高等问题,具有广阔的应用前景和工程推广价值.

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