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氧化剂投加量与作用时间(CT值)对藻类抑制效果及机理分析 被引量:5

Inhibition Effect and Mechanism Analysis of Oxidant Dosage and Action Time(CT Value)on Algae Growth
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摘要 选用臭氧、次氯酸钠和高锰酸钾三种氧化剂,探讨了在不同投加量(C)及作用时间(T)条件下,氧化剂对藻类的抑制效果与特性。结果表明,当水中初始藻细胞密度为2×10^9个/m^3时,臭氧在0.1和0.3mg/L·min投加量下作用30min或在0.6mg/L·min投加量下作用15min或在1mg/L·min投加量下作用5min,能够基本灭活藻细胞;次氯酸钠在3mg/L投加量下作用5min或0.2~1mg/L投加量下作用15min,灭活藻细胞;高锰酸钾在3mg/L投加量下作用5min或0.2—1mg/L投加量下作用30min,藻细胞基本灭活。当臭氧投加量低于0.6mg/L·min、次氯酸钠和高锰酸钾投加量低于1mg/L时,延长氧化时间对藻类的去除效果明显。以CT值作为氧化剂灭活能力评判指标,对氧化剂灭活藻类的研究表明臭氧、次氯酸钠、高锰酸钾的CT值分别大于2.5mg·min/L·min、2.4mg·min/L、2.7mg·min/L时,可灭活水中藻类物质。 The effect and mechanism of three oxidizing agent (ozone, sodium hypochlorite and potassium permanganate) on algae growth were studied. The results show that using 0. 1 and 0.3 mg/L · min ozone for 30 min, or using 0.6 mg/L · min ozone for 15 rain, or using 1 mg/L · min ozone for 5 min can inactivate algae, respectively. Using 3 mg/L NaClO for 5 min and 0.2 · 1 mg/L for 15 min can inactivate algae; using 3 mg/L KMnO4 for 5 min or 0.2 · 1 mg/L for 30 min can inactivate algae; when dosage of O3 is less than 0.6 mg/L · min and dosages of NaClO and KMnO4 are less than I mg/L, increasing oxidation time has obvious effect on removal of algae. Besides, CT value of three oxidants show when CT value of 03 , NaClO and KMnO4 are more than 2.5 mg · min/L · min, 2.4 mg · min/L, 2.7 mg · min/L, algae will be inactivated.
出处 《净水技术》 CAS 2015年第4期60-64,69,共6页 Water Purification Technology
基金 国家水体污染控制与治理科技重大专项"江苏太湖水源饮用水安全保障技术集成与综合示范"(2012ZX07403-001) 水天水处理设备有限公司水安全保障技术研究课题(STSJ2011100)
关键词 CT值 臭氧 次氯酸钠 高锰酸钾 藻类抑制 机理 oxidant dosage and action time (CT value) ozone sodium hypochlorite potassium permanganate algae inhibition mechanism
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参考文献16

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