Disinfection of hospital waste sludge using hypochlorite and chlorine dioxide

Tsai, Ching-Tsan; Lin, Shaw‐Tao

doi:10.1046/j.1365-2672.1999.00732.x

Cited by 22 publications

(16 citation statements)

References 23 publications

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“…This important consumption in water of hospitals gives significant volumes of wastewater loaded with microorganisms, heavy metals, toxic chemicals and radioactive elementsP [4] P.…”

Section: Resultsmentioning

confidence: 99%

“…If the final effluent is discharged into coastal waters close to shellfish habitats, disinfection of the effluent will be required throughout the year. To stop the phenomenon of excess load in the process of the wastewater treatment plant, it seems important to consider upstream treatments to hospital wastewater before their discharge in the municipal sewage systemP [4] P.…”

Section: Introductionmentioning

confidence: 99%

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Hospital Wastewater Treatment Using an Integrated Anaerobic Aerobic Fixed Film Bioreactor

Rezaee¹,

Ansari²,

Khavanin³

et al. 2005

American J. of Environmental Sciences

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The design and operation of wastewater treatment systems for hospital is a challenge for wastewater engineers. In this study, a pilot-scale system integrated anaerobic-aerobic fixed film reactor for hospital wastewater treatment was constructed and its performance was evaluated. The aim of the study was the elimination of organic compounds and a significant reduction of bacteria. The system had been operated for 90 days. The results show that the system efficiently removed 95.1% of the chemical oxygen demand (COD) from a hospital wastewater with the influent COD of 700 mg L^-1, leaving 34 mg L^-1 COD in the effluent. The significant removal of pathogenic bacterial has been do after operating of the system. The advantages of the treatment system studied for small wastewater flows include: (I) simple operation and maintenance; (II) efficient removal of COD and bacteria; and (III) low-energy consumption

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“…This important consumption in water of hospitals gives significant volumes of wastewater loaded with microorganisms, heavy metals, toxic chemicals and radioactive elementsP [4] P.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hospital Wastewater Treatment Using an Integrated Anaerobic Aerobic Fixed Film Bioreactor

Rezaee¹,

Ansari²,

Khavanin³

et al. 2005

American J. of Environmental Sciences

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show abstract

“…Chlorine dioxide is used as an alternative disinfectant because it does not form halogenated by-products, and is better than or equivalent to chlorine in the bactericidal effects and more remarkable than that of chlorine as a virucide in a wider pH range (Li et al, 1996Taylor and Butler, 1982b;Huang et al, 1997). However, Tsai and Lin (1999) reported that hypochlorite was better in inactivating E. coli in hospital wastewater and sludge than chlorine dioxide. This study also suggested that in terms of inactivating E. coli, f 2 phage and SARS-CoV, chlorine is better than chlorine dioxide.…”

Section: Discussionmentioning

confidence: 99%

Study on the resistance of severe acute respiratory syndrome-associated coronavirus

Wang¹,

Jin³

et al. 2005

Journal of Virological Methods

294

377

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In this study, the persistence of severe acute respiratory syndrome-associated coronavirus (SARS-CoV) was observed in feces, urine and water. In addition, the inactivation of SARS-CoV in wastewater with sodium hypochlorite and chlorine dioxide was also studied. In vitro experiments demonstrated that the virus could only persist for 2 days in hospital wastewater, domestic sewage and dechlorinated tap water, while 3 days in feces, 14 days in PBS and 17 days in urine at 20 degrees C. However, at 4 degrees C, the SARS-CoV could persist for 14 days in wastewater and at least 17 days in feces or urine. SARS-CoV is more susceptible to disinfectants than Escherichia coli and f2 phage. Free chlorine was found to inactivate SARS-CoV better than chlorine dioxide. Free residue chlorine over 0.5 mg/L for chlorine or 2.19 mg/L for chlorine dioxide in wastewater ensures complete inactivation of SARS-CoV while it does not inactivate completely E. coli and f2 phage.

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“…This ability makes it useful to a lot of kind of uses: a drinking water disinfections; bleaching textiles; antimicrobial applications (United States Environment Protection Agency (USEPA), 2000). Some studies had related its use in disinfection of municipal wastewater (Dernat & Pouillot, 1992;Tsai & Lin, 1999) and the evaluation of its efficiency (Junli, Li, Nanqi, Fang, & Li, 1997a;Junli et al, 1997b).…”

Section: Introductionmentioning

confidence: 99%

The Influence of Dioxide Chloride on Water Quality of Balneário Camboriú Beach, Brazil

Kuroshima

Barreiros

Lacava

et al. 2006

Environ Monit Assess

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Since February 1999, the Municipal Wastewater Treatment Plant (MWTP) of Balneário Camboriú, Brazil, started a complementary treatment with ClO(2) application on its effluent. It was realized to minimize its impacts caused by increase of the population during summer. This study was realized in order to verify the influence of this compound in the water quality and the environmental evaluations. Samples of surface water were collected in this environment between January 1997 and June 2001 for chemical and microbiological surveys. The results had shown that after application of ClO(2), fecal coliforms were decreased about six times in the beach (2.3 x 10(3) to 3.5 x 10(2) MPN/100 ml) and three times in the river (3.3 x 10(4) to 1.0 x 10(4) MPN/100 ml), during summer time. NH(4) (+) showed an increase of about four times and 1.5 times, respectively, to beach and river. These results are showing the influence of ClO(2) on chemical and microbiological parameters.

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Disinfection of hospital waste sludge using hypochlorite and chlorine dioxide

Cited by 22 publications

References 23 publications

Hospital Wastewater Treatment Using an Integrated Anaerobic Aerobic Fixed Film Bioreactor

Hospital Wastewater Treatment Using an Integrated Anaerobic Aerobic Fixed Film Bioreactor

Study on the resistance of severe acute respiratory syndrome-associated coronavirus

The Influence of Dioxide Chloride on Water Quality of Balneário Camboriú Beach, Brazil

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