Swine effluent post-treatment by alkaline control and UV radiation combined for water reuse

2017 ◽  
Vol 140 ◽  
pp. 1247-1254 ◽  
Author(s):  
Patrícia Bilotta ◽  
Ricardo Luiz Radis Steinmetz ◽  
Airton Kunz ◽  
Rubia Mores
Keyword(s):  
Uv Radiation ◽  
Water Reuse ◽  
Post Treatment ◽  
Swine Effluent

Post-treatment of dairy wastewater by activated sludge-ultrafiltration for water reuse

2018 ◽  
Vol 115 ◽  
pp. 24-32
Author(s):  
Temesgen Sibhatu Habtu ◽  
Magdalena Zielinska
Keyword(s):  
Activated Sludge ◽  
Water Reuse ◽  
Post Treatment ◽  
Dairy Wastewater

Tertiary treatment of slaughterhouse effluent: degradation kinetics applying UV radiation or H2O2/UV

2009 ◽  
Vol 60 (7) ◽  
pp. 1869-1874 ◽  
Author(s):  
D. B. Luiz ◽  
A. K. Genena ◽  
H. J. José ◽  
R. F. P. M. Moreira ◽  
H. Fr. Schröder
Keyword(s):  
Uv Radiation ◽  
Aromatic Compounds ◽  
Water Reuse ◽  
Degradation Kinetics ◽  
Water Source ◽  
Tertiary Treatment ◽  
First Order ◽  
Pseudo First Order ◽  
Over Exploitation ◽  
Kinetics Of

In some Brazilian regions, surface water has become scarce, e.g. semi arid climate areas and densely populated and industrial areas, where water over-exploitation and/or fluvial pollution has been more common. Advanced oxidative processes (AOP) provide treated water as a source of reuse water even with the characteristics of drinking water enabling water reuse practices also in food industries. The secondary wastewater of a slaughterhouse was the water source for a tertiary treatment study evaluating the kinetics of the photo-induced degradation of color and UV254 under UV radiation with and without the addition of H2O2. The proximity of the k′ values of color and UV254 degradation by UV indicates that the compounds responsible for color may be the same content measured by UV254. The H2O2/UV treatment was 5.2 times faster than simple UV in removing aromatic compounds. The degradation kinetics of aromatic compounds in both treatments followed a pseudo-first order law. The pseudo-first order constant for H2O2/UV and UV treatments were kUV254′=0.0306 min−1 and kUV254′=0.0056 min−1, respectively.

Application of novel Modified Biological Aerated Filter (MBAF) as a promising post-treatment for water reuse: Modification in configuration and backwashing process

2017 ◽  
Vol 203 ◽  
pp. 191-199 ◽  
Author(s):  
Ali Nikoonahad ◽  
Mohammad Taghi Ghaneian ◽  
Amir Hossein Mahvi ◽  
Mohammad Hassan Ehrampoush ◽  
Ali Asghar Ebrahimi ◽  
...  
Keyword(s):  
Water Reuse ◽  
Post Treatment ◽  
Biological Aerated Filter ◽  
Aerated Filter

scholarly journals Application of the Ultrafiltration and Photooxidation Process for the Treatment of Rainwater

2021 ◽  
Vol 232 (12) ◽  
Author(s):  
Anna Marszałek ◽  
Mariusz Dudziak
Keyword(s):  
Uv Radiation ◽  
Membrane Fouling ◽  
Water Reuse ◽  
Cross Flow ◽  
Quality Parameters ◽  
Coliform Bacteria ◽  
Effectiveness And Efficiency ◽  
Study Laboratory ◽  
Roofing Materials ◽  
Ultrafiltration Process

AbstractAs water resources become increasingly scarce, the concept of water reuse is gaining importance. Recently, attention has been paid to the use of rainwater as an alternative water resource. Part of this study, laboratory-scale experiments were conducted to evaluate the effectiveness and efficiency of the ultrafiltration process. The aim of the research was to assess the influence of pollutants from various roof coverings on the ultrafiltration process and the occurrence of membrane fouling. Additionally, the rainwater disinfection process was performed using UV radiation. Analysis of rainwater collected from various roofing materials, evaluating rainwater treatment by ultrafiltration in a cross-flow system, determination of the effectiveness and efficiency of the UF membrane, and additional disinfection of rainwater using UV radiation were carried out. Rainwater was collected from various roofing materials, such as steel roof tiles (RW1), bituminous shingles (RW2), and tar paper roofing (RW3). The treatment efficiency of ultrafiltration was evaluated by monitoring typical quality parameters: color, turbidity, COD, TOC, absorbance of UV254, ammonium, conductivity, and pH. Coliform bacteria, Escherichia coli and Enterococci, were monitored as total number of microorganisms at 22 ± 2 °C after 72 h. As expected, a significant reduction in individual parameters was recorded. COD of rainwater decreased in RW1 by 59%, in RW2 by 69%, and in RW3 by 74%. The ultrafiltration process ensured the complete retention of the coliform bacteria and E. coli. Complete elimination of microorganisms was demonstrated when the ultrafiltration process and UV radiation disinfection were combined.

Total and hexavalent chromium removal in a subsurface horizontal flow (h-SSF) constructed wetland operating as post-treatment of textile wastewater for water reuse

2011 ◽  
Vol 64 (4) ◽  
pp. 826-831 ◽  
Author(s):  
D. Fibbi ◽  
S. Doumett ◽  
I. Colzi ◽  
E. Coppini ◽  
S. Pucci ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Constructed Wetland ◽  
Water Reuse ◽  
Textile Wastewater ◽  
Trivalent Chromium ◽  
Post Treatment ◽  
Chromium Removal ◽  
Treatment Efficiency ◽  
Reed Bed

In this study we investigated total and hexavalent chromium removal in an h-SSF constructed wetland (CW) planted with Phragmites australis and operating as post-treatment of effluent wastewater from an activated sludge plant serving the textile industrial district of Prato (Italy). Two measurement campaigns were carried out in 2006 and 2008–2010 in which more than 950 inlet and outlet samples were analyzed. When inlet and outlet concentrations were compared one to the other, the latter were found to be significantly lower than the former (p < 0.001); during the entire period of investigation, removal of hexavalent chromium equal to about 70% was achieved. Outlet concentrations ranged between values lower than the quantification limit (0.5 μg L−1) and 4.5 μg L−1, and in all cases were therefore lower than the limit indicated for hexavalent chromium in the Italian regulation for water reuse (5 μg L−1). The comparison of the removal efficiencies achieved for hexavalent and trivalent chromium during the two campaigns suggested that the removal of the former can be sustained in the long term, while for the latter, the treatment efficiency is more sensitive to the age of the CW, being that it is it based on trivalent chromium retention in the reed bed.

Settling and survival profile of enteric pathogens in the swine effluent for water reuse purpose

2016 ◽  
Vol 219 (8) ◽  
pp. 883-889 ◽  
Author(s):  
G. Fongaro ◽  
A. Kunz ◽  
M.E. Magri ◽  
C.D. Schissi ◽  
A. Viancelli ◽  
...  
Keyword(s):  
Water Reuse ◽  
Enteric Pathogens ◽  
Swine Effluent

Membrane Treatment of Secondary Textile Effluents for Direct Reuse

1999 ◽  
Vol 40 (4-5) ◽  
pp. 409-416 ◽  
Author(s):  
A. Rozzi ◽  
M. Antonelli ◽  
M. Arcari
Keyword(s):  
Membrane Fouling ◽  
Water Reuse ◽  
Textile Wastewater ◽  
Pilot Scale ◽  
Post Treatment ◽  
Economical Analysis ◽  
Textile Dyeing ◽  
High Concentrations ◽  
Membrane Treatment

Post-treatment of secondary textile wastewater was tested at pilot scale on membrane modules (microfiltration MF, nanofiltration NF and reverse osmosis RO) for the direct reuse of polished effluent within the dyeing processes. The main polluting parameters monitored in the post-treatment were: organic compounds (COD), colour, surfactants and salinity (as conductivity). The first treatment scheme was made of ceramic MF followed by NF. Aluminium polychloride was added at high concentrations (of the order of 70 mg Al/L) to avoid MF membrane fouling. The quality of the final permeate, produced by NF fed on the MF permeate, was acceptable for water reuse. Clariflocculation (CF) plus multimedia filtration (MMF) followed by low-pressure RO was also tested. This process performed quite well: the RO module (p = 4 bar) ran for relatively long cycles (up to 80 hours) with 5% reduction of the permeate flow rate at a 10 L m−2 h−1 fluxes. A techno-economical analysis on the experimental data indicate that a high quality effluent (COD < 10 mg/l; conductivity < 40 μS/cm; negligible residual colour), to be recycled in the textile dyeing industry, may be produced at affordable costs (less than 0.25 ECU) from secondary textile wastewater.

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