【摘 要】
：
以枯草芽孢杆菌(ATCC6633)的孢子作为难灭活微生物的代表,研究了CT值、pH、温度对臭氧灭活水中芽孢的影响,并探讨了相关灭活反应的动力学特征.结果表明,臭氧灭活芽孢的过程可分为延滞期和灭活期,其灭活反应符合Chick-Watson延迟反应动力学模型.在半连续流反应模式下,当臭氧浓度在0.42-4.00 mg/L,反应时间0-20 min,pH值6-8,温度1-30℃范围内时,臭氧对芽孢的灭活
【机 构】
：
哈尔滨工业大学 城市水资源与水环境国家重点实验室,黑龙江 哈尔滨 150090 中国环境科学研究院
论文部分内容阅读
以枯草芽孢杆菌(ATCC6633)的孢子作为难灭活微生物的代表,研究了CT值、pH、温度对臭氧灭活水中芽孢的影响,并探讨了相关灭活反应的动力学特征.结果表明,臭氧灭活芽孢的过程可分为延滞期和灭活期,其灭活反应符合Chick-Watson延迟反应动力学模型.在半连续流反应模式下,当臭氧浓度在0.42-4.00 mg/L,反应时间0-20 min,pH值6-8,温度1-30℃范围内时,臭氧对芽孢的灭活效果与臭氧的CT值显著相关,与单独的臭氧浓度无关,CT值越高,所能达到的灭活率也越高.同时,温度对反应速率常数常数k影响较大,即随着温度的升高,灭活反应的延滞期CTlag显著减小,反应速率常数k增大,臭氧对芽孢的灭活能力增强；而反应速率常数k在各pH下基本不变,对芽孢的灭活影响甚微.
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