Domestic Wastewater Disinfection Using Solar Radiation for Agricultural Reuse

Recently, the fate of emerging compounds in environmentally relevant samples has attracted considerable attention. Solar semiconductor photocatalysis may offer an appealing methodology to treat such contaminants. At the same time the use of solar photocatalysis for water and wastewater disinfection is a topic well-documented in the literature. In this respect, the simultaneous degradation of synthetic estrogen 17α-ethynylestradiol (EE2) and Escherichia coli removal employing simulated solar radiation and TiO2 as the photocatalyst was investigated. In general, the more complex the water matrix is the slower E. coli removal becomes, while the presence of E. coli in the reaction mixture did not obstruct EE2 removal. <div> Although EE2 removal occurred relatively fast, overall estrogenic activity was only partially removed. This implies that other species inherently present in the effluent and/or some photocatalytic transformation by-products may be proportionately more estrogenic than EE2. Overall, the use of solar radiation can constitute an advantageous treatment strategy for the simultaneous removal of micro-pollutants and pathogens from secondary treated effluent. </div>

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Diclofenac Toxicity Abatement in Wastewater with Solar Disinfection: A Study in the Rural Area of Brazil’s Central−West Region

Water ◽

10.3390/w13081043 ◽

2021 ◽

Vol 13 (8) ◽

pp. 1043

Author(s):

Nathália Sanches dos Santos ◽

Laura Fernanda Marquiza ◽

Cristina Sousa Coutinho Calheiros ◽

Priscila Sabioni Cavalheri ◽

Beatriz Santos Machado ◽

...

Keyword(s):

Solar Radiation ◽

Rural Areas ◽

Emerging Contaminants ◽

Domestic Wastewater ◽

Root Growth Inhibition ◽

Radiation Toxicity ◽

Solar Disinfection ◽

Toxicity Monitoring ◽

West Region ◽

Allium Cepa L

Domestic wastewater has been targeted for the presence of emerging contaminants such as antibiotics, of which diclofenac is one of the most frequently detected. Many studies have focused on the removal of these emerging pollutants. However, the legislation has focused on toxicity monitoring. In search of simplified solutions for rural areas, and to guarantee the safe reuse of effluent in agriculture, this study evaluated the efficiency of a decentralized solar disinfection (SODIS) system regarding the reduction of ecotoxicity, phytotoxicity, and pathogens in domestic wastewater after adding diclofenac potassium. For this purpose, the bioindicators Artemia sp., Allium cepa L. and Lactuca sativa were used, after 1, 2, and 3 h of exposure to solar radiation. After 3 h of exposure to solar radiation, toxicity was reduced and root growth inhibition was noted, which indicates low effluent toxicity after treatment by the SODIS system. It was achieved a reduction of 3 and 2 log units in the concentration of total coliforms and Escherichia coli, respectively.

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COMPARISON OF CHLORINATION, ULTRAVIOLET RADIATION AND SOLAR RADIATION (SODIS), IN CONTINUOUS FLOW FOR WASTEWATER DISINFECTION / COMPARAÇÃO ENTRE CLORAÇÃO, RADIAÇÃO ULTRAVIOLETA E RADIAÇÃO SOLAR, COM FLUXO CONTÍNUO NA DESINFECÇÃO DE EFLUENTES DOMÉSTICO

Revista Brasileira de Engenharia de Biossistemas ◽

10.18011/bioeng2009v3n2p117-126 ◽

2009 ◽

Vol 3 (2) ◽

pp. 117 ◽

Cited By ~ 1

Author(s):

MARCELO JACOMINI MOREIRA DA SILVA ◽

JOSÉ EUCLIDES STIPP PATERNIANI

Keyword(s):

Solar Radiation ◽

Ultraviolet Radiation ◽

Continuous Flow ◽

Wastewater Disinfection

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Wastewater disinfection using ultraviolet (UVA, UVC) and solar radiation

Desalination and Water Treatment ◽

10.1080/19443994.2014.968909 ◽

2014 ◽

Vol 56 (10) ◽

pp. 2646-2652 ◽

Cited By ~ 1

Author(s):

Sadek Igoud ◽

Fatiha Souahi ◽

Chems Eddine Chitour ◽

Lynda Amrouche ◽

Chahinez Lamaa ◽

...

Keyword(s):

Solar Radiation ◽

Wastewater Disinfection

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Construction of a Cost-Effective Domestic Wastewater Disinfection Filter from Biosynthesized Compared to Commercial Nanosilver

10.21203/rs.3.rs-572443/v1 ◽

2021 ◽

Author(s):

Heba S. Taher ◽

Rania Sayed ◽

Asmaa Loutfi ◽

Hesham Mohammed Abdulla

Keyword(s):

Domestic Wastewater ◽

Cost Effective ◽

X Ray Diffraction ◽

Ag Nps ◽

Transmission Electron ◽

Disinfection Process ◽

Significant Difference ◽

Wastewater Disinfection ◽

Uv Visible ◽

Better Than

Abstract Biosynthesis of nanoparticles is considered one of the most significant aspects of nanotechnology, it is an eco-friendly process. In this paper, Streptomyces sp. U13 (KP109813) was used to biosynthesize silver nanoparticles (Ag NPs) to construct a cost-effective wastewater disinfection filter. A comparison between the biosynthesized nanosilver and a commercially available ink nanosilver was done on both their characteristics and wastewater disinfection efficiency. The nanometrological characteristics of the biosynthesized and commercially available nanosilver such as structure, shape, size, and optical properties were investigated using the X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), high resolution transmission electron microscope (HR-TEM), and UV-Visible spectroscopy, respectively. Ag NPs were loaded on two substrates, foam and limestone gravel. Ag NPs attached to limestone gravel better than foam and eliminated all coliforms. Wastewater disinfection under different conditions was tested. The results concluded that the type of substrate controls the amount of Ag NPs that loaded on it and thus control the disinfection process. No significant difference between using biosynthesized nanosilver and commercially available ink nanosilver in wastewater disinfection. Using limestone gravel filter loaded with 200 mg/l Ag NPs with contact time 150 min are required to reduce the number of coliforms to nil.

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