A MEDICAL WASTEWATER SLUDGE DISINFECTION TECHNOLOGY OF ALKALINE DISINFECTANTS COUPLED WITH LOW-TEMPERATURE HEAT TREATMENT

ZHANG Yunjie; HOU Jiang; YONG Yi; XING Tao; ZHANG Li

doi:10.13205/j.hjgc.202208013

Volume 40 Issue 8

Nov. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2022 > 40(8): 96-101

ZHANG Yunjie, HOU Jiang, YONG Yi, XING Tao, ZHANG Li. A MEDICAL WASTEWATER SLUDGE DISINFECTION TECHNOLOGY OF ALKALINE DISINFECTANTS COUPLED WITH LOW-TEMPERATURE HEAT TREATMENT[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(8): 96-101. doi: 10.13205/j.hjgc.202208013

Citation:

ZHANG Yunjie, HOU Jiang, YONG Yi, XING Tao, ZHANG Li. A MEDICAL WASTEWATER SLUDGE DISINFECTION TECHNOLOGY OF ALKALINE DISINFECTANTS COUPLED WITH LOW-TEMPERATURE HEAT TREATMENT[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(8): 96-101. doi: 10.13205/j.hjgc.202208013

Citation:

ZHANG Yunjie, HOU Jiang, YONG Yi, XING Tao, ZHANG Li. A MEDICAL WASTEWATER SLUDGE DISINFECTION TECHNOLOGY OF ALKALINE DISINFECTANTS COUPLED WITH LOW-TEMPERATURE HEAT TREATMENT[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(8): 96-101. doi: 10.13205/j.hjgc.202208013

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A MEDICAL WASTEWATER SLUDGE DISINFECTION TECHNOLOGY OF ALKALINE DISINFECTANTS COUPLED WITH LOW-TEMPERATURE HEAT TREATMENT

doi: 10.13205/j.hjgc.202208013

Sichuan Academy of Environmental Sciences, Chengdu 610000, China

Received Date: 2021-11-16
Publish Date: 2022-11-08

Abstract

Abstract

To resolve the lack of medical sludge treatment technologies, the disinfection effect of alkaline disinfectants coupled with low-temperature heat treatment on medical wastewater sludge was evaluated by using Bacillus subtilis var. niger Spore as the indicator bacteria. The results indicated that the optimum dosage of CaO disinfection for medical wastewater sludge was 5%. The heat treatment temperature needed to be 70 ℃ above, and medical wastewater sludge disinfection requirements could be met by treating at 80 ℃ for 2 h, or 70 ℃ for 4 h. Compared with 5% CaO alone, adding 1% NaOH could shorten the treatment time at 80 ℃ and 70 ℃ to 1h and 3 h, respectively. The dewatering performance of medical wastewater sludge was effectively improved after alkaline disinfection. The results of this study can provide a theoretical basis and data support for the formation of centralized disinfection treatment technology for medical wastewater sludge.
- medical wastewater sludge,
- alkaline disinfection,
- Bacillus subtilis var.niger Spore,
- low-temperature heat treatment

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References(17)

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