Disinfection efficiency of peracetic acid, UV and ozone after enhanced primary treatment of municipal wastewater

Gehr, Ronald; Wagner, Monika; Veerasubramanian, Priya; Payment, Pierre

doi:10.1016/s0043-1354(03)00394-4

Cited by 232 publications

(130 citation statements)

References 21 publications

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“…As mentioned above, this is most probably due to the accelerated self-decomposition of ozone at a high concentration. It was reported that a transferred ozone dose of 30-50 mg/L achieved a 2 log reduction of fecal coliform in the effluent of a wastewater treatment plant (Gehr et al, 2003). Our results show that an ozone dose of 100 mg/L could achieve a 3.3-3.9 log reduction of total bacteria in lagoon samples, but about 1.1-1.8 Â 10 4 cfu/mL bacteria still survived the ozone treatment.…”

Section: Discussionmentioning

confidence: 48%

Disinfection of swine wastewater using chlorine, ultraviolet light and ozone

et al. 2006

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Swine wastewater Chlorine Ultraviolet light Ozone A B S T R A C TVeterinary antibiotics are widely used at concentrated animal feeding operations (CAFOs) to prevent disease and promote growth of livestock. However, the majority of antibiotics are excreted from animals in urine, feces, and manure. Consequently, the lagoons used to store these wastes can act as reservoirs of antibiotics and antibiotic-resistant bacteria.There is currently no regulation or control of these systems to prevent the spread of these bacteria and their genes for antibiotic resistance into other environments. This study was conducted to determine the disinfection potential of chlorine, ultraviolet light and ozone against swine lagoon bacteria. Results indicate that a chlorine dose of 30 mg/L could achieve a 2.2-3.4 log bacteria reduction in lagoon samples. However, increasing the dose of chlorine did not significantly enhance the disinfection activity due to the presence of chlorine-resistant bacteria. The chlorine resistant bacteria were identified to be closely related to Bacillus subtilis and Bacillus licheniformis. A significant percentage of lagoon bacteria were not susceptible to the four selected antibiotics: chlortetracycline, lincomycin, sulfamethazine and tetracycline (TET). However, the presence of both chlorine and TET could inactivate all bacteria in one lagoon sample. The disinfection potential of UV irradiation and ozone was also examined. Ultraviolet light was an effective bacterial disinfectant, but was unlikely to be economically viable due to its high energy requirements. At an ozone dose of 100 mg/L, the bacteria inactivation efficiency could reach 3.3À3.9 log.

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Section: Discussionmentioning

confidence: 48%

Disinfection of swine wastewater using chlorine, ultraviolet light and ozone

et al. 2006

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“…The dissolved oxygen concentration and the pH were determined with a dissolved oxygen meter (HQ30D, Hach, USA) and automatic potentiometric titrator meter (ZD-2, LEICI, China) respectively at 20 ºC. The gaseous ozone concentration was mesasured with the iodometric method [13]. The concentration of dissolved ozone was tested with the indigo colorimetric method (Standard Method 4500-O 3 B) [14].…”

Section: Most Of the Wastewater Quality Parameters Were Measured Accomentioning

confidence: 99%

Microbubble enhanced ozonation process for advanced treatment of wastewater produced in acrylic fiber manufacturing industry

Zheng

Wang

Tao

et al. 2015

Journal of Hazardous Materials

106

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Microbubble enhanced ozonation process for advanced treatment of wastewater produced in acrylic fiber manufacturing industry, Journal of Hazardous Materials http://dx.doi.org/10.1016/j.jhazmat. 2015.01.069 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractThis work investigated microbubble-ozonation for the treatment of a refractory wet-spun acrylic fiber wastewater in comparison to macrobubble-ozonation. COD cr , NH 3 -N, and UV 254 of the wastewater were removed by 42%, 21%, and 42% respectively in the microbubble-ozonation, being 25%, 9%, and 35% higher than the removal rates achieved by macrobubble-ozonation at the same ozone dose. The microbubbles (with average diameter of 45 μm) had a high concentration of 3.9 × 10 5 counts/mL at a gas flow rate of 0.5 L/min. The gas holdup, total ozone mass-transfer coefficient, and average ozone utilization efficiency in the microbubble-ozonation were 6.6, 2.2, and 1.5 times higher than those of the macrobubble-ozonation. Greater generation of hydroxyl radicals and a higher zeta potential of the bubbles were also observed in the microbubble ozonation process. The biodegradability of the wastewater was also significantly improved by microbubble-ozonation, which was ascribed to the enhanced degradation of alkanes, aromatic compounds, and the many other bio-refractory organic compounds in the wastewater. Microbubble-ozonation can thus be a more effective treatment process than traditional macrobubble-ozonation for refractory wastewater produced by the acrylic fiber manufacturing industry.

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“…Embora o ozônio seja um desinfetante bastante utilizado para águas de abastecimento, ele não é muito aplicado para desinfecção de águas residuárias em função da alta exigência, em quantidade de ozônio (ROBSON & RICE, 1991;XU et al, 2002;GEHR et al, 2003).…”

Section: Parâmetrounclassified

Desinfecção de efluente anaeróbio com o uso de ozônio/cloro

Silva

Daniel

2015

Eng. Sanit. Ambient.

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RESUMOO principal objetivo desta pesquisa foi estudar o processo de oxidação, a eficiência da inativação de coliformes e a formação de subprodutos da ozonização, associado com a desinfecção de efluente sanitário anaeróbio proveniente de um reator UASB. Tal evento foi realizado por meio da aplicação das dosagens de ozônio de 5,0 mg.O 3 .L -1 + 10 mg.Cl 2 .L -1 (ensaio 1); ABSTRACTThe main purpose of this research was to study the oxidation process, the coliform inactivation effectiveness, and the formation of ozone disinfection byproducts, which were associated with disinfection of the anaerobic sanitary wastewater effluent from a UASB reactor. Nos últimos anos, em função da maior atenção dada às saúdes ambiental e pública, houve um aumento da preocupação com a possível toxicidade dos agentes desinfetantes e dos respectivos subprodutos da desinfecção.

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Disinfection efficiency of peracetic acid, UV and ozone after enhanced primary treatment of municipal wastewater

Cited by 232 publications

References 21 publications

Disinfection of swine wastewater using chlorine, ultraviolet light and ozone

Disinfection of swine wastewater using chlorine, ultraviolet light and ozone

Microbubble enhanced ozonation process for advanced treatment of wastewater produced in acrylic fiber manufacturing industry

Desinfecção de efluente anaeróbio com o uso de ozônio/cloro

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