臭氧消毒医院污水的应用

<正> 臭氧(O_2)是氧的同素异形体。1906年法国首先将其用于给水清毒。此后,这种给水消毒法在欧洲被广泛采用。臭氧用于废水消毒是在廿世纪七十年代初开始的。由于臭氧技术发展迅速,并具有其它消毒剂所不具备的优点,因此正在逐渐替代传统的氯化消毒法。南昌市传染病院于1981年开始使用臭

USE OF OZONE FOR DISINFECTION OF SEWAGE IN HOSPITAL

Ozone has been used for disinfection of sewage in Nanchang Communicable Disease Hospital for 5 years. The equipment used for disinfection with ozone can treat 18～20 tons of sewage per hour. It was found that the average total bacteria count of untreated sewage was 9450/ml. After filtration and sedimentation (primary treatment), it was reduced to 2900/ml and to 122/ml after ozonization (15～20 mg/L, 10～15 min). The average number of coil-group was reduced from 250,000/L to 30/L after ozonization. The average BOD value of untreated sewage was 0.8 mg/L and was reduced to 0.4 mg/L after ozone disinfection. The average COD value was reduced from 3.0 mg/L to 2.0 mg/L, while the average DO value increased from 2.1 mg/L to 9.1 mg/L after ozonization.In practice, it was indicated that disinfection of sewage by ozone could kill the microorganisms without formation of toxic residues. The fishes bred in sewage treated by chlorine die quickly, while grow well in ozonized sewage.