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    • 51. 发明专利
    • Waste liquid treatment method and apparatus using iron-oxidizing bacteria
    • 使用铁氧化细菌的废液处理方法和装置
    • JP2008264654A
    • 2008-11-06
    • JP2007109702
    • 2007-04-18
    • Nippon Steel Corp新日本製鐵株式会社
    • ONO NOBUYUKIKANEMORI NOBUYUKITAKAHASHI NAOYA
    • C02F3/34C02F1/62
    • PROBLEM TO BE SOLVED: To provide a waste liquid treatment method and apparatus using iron-oxidizing bacteria which can detect the contamination of an activity inhibitor at an early stage even in a case that the activity inhibitor is temporarily mixed to suppress a deterioration of divalent iron ion-oxidizing capacity by the iron-oxidizing bacteria and return the capacity at early stage.
      SOLUTION: In the waste liquid treatment method, acidic waste liquid containing divalent iron ions is supplied into a reaction tank in which iron-oxidizing bacteria exist, to oxidize the divalent iron ions to trivalent iron ions by the iron-oxidizing bacteria, the pH of the waste liquid is adjusted to 3 or more and 5 or less to generate iron (III) hydroxide particles in it, and the waste liquid discharged from the reaction tank is settled and separated to recover the iron (III) hydroxide particles. The oxidation-reduction potential and pH of the waste liquid in the reaction tank are continuously measured. By using a linear correlation between oxidation-reduction potential and pH, a corrected value of the oxidation-reduction potential is calculated from the two measured values, and when the corrected value is equal to or less than a predetermined value, a supply of the waste liquid containing divalent iron ions is stopped or reduced.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供一种使用铁氧化细菌的废液处理方法和装置,即使在暂时混合活性抑制剂以抑制劣化的情况下也能够早期检测活性抑制剂的污染 的铁氧化细菌的二价铁离子氧化能力,并在早期恢复能力。 解决方案:在废液处理方法中,将含有二价铁离子的酸性废液供给到存在铁氧化细菌的反应槽中,通过铁氧化细菌将二价铁离子氧化为三价铁离子, 将废液的pH调节至3以上且5以下,生成氢氧化铁中的铁(III),将从反应槽排出的废液进行沉降分离,回收氢氧化铁(III)。 连续地测量反应槽中废液的氧化还原电位和pH。 通过使用氧化还原电位和pH之间的线性相关性,从两个测量值计算氧化还原电位的校正值,并且当校正值等于或小于预定值时,废物的供应 含有二价铁离子的液体停止或减少。 版权所有(C)2009,JPO&INPIT