CDS－1型臭氧水处理塔杀菌效果观察

试验表明，在ＣＤＳ－１型臭氧水处理塔中，对水中人工污染的大肠杆菌，用０．１１ｍｇ／Ｌ臭氧作用４５分钟可杀灭９９．９９％，对枯草杆菌黑色变种芽胞，用３．１１ｍｇ／Ｌ臭氧作用４５分钟可杀灭９９．９０％。对河水与医院污水中自然菌杀灭效果较差。臭氧产量与水温可影响处理塔的消毒效果。

OBSERVATION ON GERMICIDAL EFFICACY OF CDS-1 TYPE EQUIPMENT FOR WATER DISINFECTION WITH OZONE

The efficacy of CDS-1 Type Equipment for Water Disinfection with Ozone was tested.It was indicated that 0.11mg/L ozone with a 45 minute contact time could kill 99.99% of Fscherichia coli in artificially contaminatedwater and3.11mg/L ozone with a 45 minutecontact time could kill 99. 90% of spores of Bacillus sublilis、var,niger in the water. Fordisinfection of contaminated river water,0.11 mg / L ozone with a 45 minute contact timecould reduce the total bacterial count by 97.17%,while 1.37 mg / L ozone could only reducethe total bacterial count of hospital sewage by 68.00%. Observation on influencing factors indicated that the influence of contact time tested onthe germicidal efficacy was insigniflcant.The higher the ozone concentration,the better thegermicidal efflcacy.Under the conditions of the test,the ozone concentration in water in-creased with increasing ozone production by the equipment(150～200 g/h)and decreasingwater temperature(20～26℃).