Treatment of waste water by a combined technique of radiation and conventional method

Sakumoto, Akihisa; Miyata, Teijiro

doi:10.1016/0146-5724(84)90010-4

Cited by 32 publications

(17 citation statements)

References 10 publications

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“…To remove suspended particles resulting from ELT, it is advisible to use subsequent coagulation, flotation, or sedimentation. In particular, the coagulant can be used either at the stage of radiolysis, or at the stage of subsequent post-treatment. ,,,− …”

Section: Combined Application Of Treatment Methodsmentioning

confidence: 99%

“…Dissociative capture of intermediates is quite common during ELT. For example, ELT is suitable to neutralize toxic and carcinogenic organochlorine impurities such as dichloroethane, trichloroethane, trichlorethylene, tetrachlorethylene, chlorobenzene, chlorophenols, dichlorophenols, pentachlorophenols or some others. ,,,,− In the presence of organochlorine impurities, the synergistic effect of the combined use of radiolysis and ozonolysis is most often observed. ,,− Ozone is inevitably formed due to the radiolysis of air between the beam window of the accelerator and the flow of water subjected to irradiation. Due to the high oxidizing ability (Figure ), ozone itself is a very effective means of disinfecting impurities in water; − therefore, radiolytic ozone is advisible for use in enhancing the radiolytic treatment of water.…”

Section: Combined Application Of Treatment Methodsmentioning

confidence: 99%

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The Green Method in Water Management: Electron Beam Treatment

Пономарев

Ершов

2020

Environ. Sci. Technol.

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During the prebiotic era, radiolytic transformations in the oceans played a key role in purifying water from toxic impurities and, thus, played a role in the formation of the aquatic environment of our planet, making it suitable for the emergence of life. Today, the planet again faces the challenge of how to provide people with clean water. Therefore, it is reasonable to look back at past historical stages and again consider the possibility of neutralizing pollutants in water by means of radiolysis, which has already been tested by time. Modern radiolytic treatments can be much faster and safer thanks to the advent of powerful electron accelerators and high-rate electron beam treatment (ELT) of water and wastewater. Radiolytic treatment of water using accelerated electrons corresponds to the essence of advanced oxidative technologies and green chemistry. The ELT of water instantly generates a high concentration of short-lived radicals that can quickly neutralize and decompose chemical and bacterial pollutants. Due to the ability of accelerated electrons to penetrate into a substance, ELT provides the decomposition of both dissolved and suspended pollutants. The cleaning effect of ELT is due to the ability to inactivate toxic and chromophore functional groups, transform impurities into an easily removable form, damage the DNA of microorganisms and their spore forms, and increase the biodegradability of organic impurities. The use of ELT in water treatment provides significant savings in chemical reagents, thereby improving quality and reducing the number of cleaning steps. The compactness, high degree of automation of the equipment used, energy efficiency, high productivity, and excellent compatibility with traditional water treatment methods are important advantages of ELT. Unlike conventional chemicals, the excess radicals generated in the ELT process are converted back to water and hydrogen; thus, the chemical and corrosive activity of water does not increase. Equipping research institutes with electron accelerators, developing cheaper accelerators, and granting government support for pilot projects are key conditions for introducing ELT into water treatment practice.

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Section: Combined Application Of Treatment Methodsmentioning

confidence: 99%

Section: Combined Application Of Treatment Methodsmentioning

confidence: 99%

The Green Method in Water Management: Electron Beam Treatment

Пономарев

Ершов

2020

Environ. Sci. Technol.

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“…Many researchers have tried different conventional methods for wastewater treatment such as biological oxidation, physico-chemical process; carbon bed adsorption, coagulation/flocculation, membrane separation, electrochemical treatment and oxidation etc. (Shubham et al, 2020;Sakumoto and Miyata, 1984). But the reduction in the level of toxicity using these methods have been not meet the environmental regulations especially for the complex effluents (Chandak et al,2020).…”

Section: Introductionmentioning

confidence: 99%

Microbial Kinetic Analysis of a Hybrid UASB Reactor

2020

Global NEST: The International Journal

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<p>Microbial kinetics of a hybrid upflow anaerobic sludge blanket (UASB) reactor were investigated when treating chemical synthesis–based pharmaceutical wastewater. Monod, Grau first-order, Grau second-order, Stover-Kincannon, Chen & Hashimoto kinetic models were applied to the hybrid reactor. The second-order model was found to be the most appropriate model for the hybrid reactor (R2 = 0.99) and offers the best description of the process. The substrate removal rate constant (k2S) was found to be 4.91 d-1.</p>

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“…Therefore, it might be more reasonable to employ ionizing radiation with the combination of other methods. Synergistic effects on contaminant destruction have been achieved through combinations of radiation with conventional treatment methods, such as combination of ␥-ray irradiation with ozonation [19] and combination of electron beam irradiation with biotransformation [20].…”

Section: Introductionmentioning

confidence: 99%

Effects of an electric or magnetic field on the radiolytic degradation of two biorefractory contaminants

Zhang

et al. 2005

Journal of Hazardous Materials

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Treatment of waste water by a combined technique of radiation and conventional method

Cited by 32 publications

References 10 publications

The Green Method in Water Management: Electron Beam Treatment

The Green Method in Water Management: Electron Beam Treatment

Microbial Kinetic Analysis of a Hybrid UASB Reactor

Effects of an electric or magnetic field on the radiolytic degradation of two biorefractory contaminants

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