次氯酸钠和二氧化氯消毒液对城市污水消毒效果的研究

目的:用模拟现场和现场试验观察了次氯酸钠和二氧化氯消毒液对城市污水中微生物的杀灭效果。结果:模拟现场试验中以含有效氯10mg/L的次氯酸钠或含8mg/L二氧化氯消毒液对污水中大肠杆菌作用20min,杀灭率达到100%;以含有效氯300mg/L的次氯酸钠溶液,作用20min,污水中脊髓灰质炎病毒杀灭对树值可达4。现场消毒试验以含有效氯10mg/L的次氯酸钠或8mg/L二氧化氯,作用20min,污水中粪大肠菌群和总大肠菌群<90个/L,沙门氏菌、志贺氏菌和脊髓灰质炎病毒未检出。结论:次氯酸钠和二氧化氯消毒液对污水微生物均有较好的杀灭作用,污水中脊髓灰质炎病毒对消毒剂氯的抵抗力大于大肠杆菌。

STUDY ON DISINFECTION EFFICACY OF SODIUM HYPOCHLORITE AND CHLORINE DIOXIDE ON MUNICIPAL SEWAGE

Simulated field trial and on-the-spot trial were used to observe germicidal efficacy of soudium hypochlorite and chlorine dioxide on municipal sewage.Simulated field trail results showed that the sodium hypochlorite solution containing available chlorine 10mg/L or 8mg/L chlorine dioxide with a 20 min contact time both killed 100% of Eschreichia coli in sewage.The killing logarithm of poliovirus in sewage exposed to the sodium hypochlorite solution containing available chlorine 300mg/L for 20 min attained 4.On-the-spot trial results showed that fecal coli-group and total coli-group in sewage were <90 cfu/L,salmomella,shigella and poliovirus were not tested when the sodium hypochlorite solution containing.available chlorine 10mg/L or 8mg/L chlorine dioxide with a 20 min contact time.Conclusion: Sodium hypochlorite and chlorine dioxide have good germicidal efficacy to sewage,the resistance to chlorine of poliovirus in sewage was higer than that of Eschreichia coli.