Addition of hydrogen peroxide in electrocoagulation of dairy liquids

Standing out on the national and world scene as an important economic and social activity, the dairy products industries are characterized by their high polluting potential, especially due to the liquid effluents generated. In this context, the present work aims to study the application of the electrocoagulation process applied associatively with hydrogen peroxide (H2O2) in the treatment of dairy effluents using iron electrodes. Effluent treatments were carried out with the electrocoagulation process in a continuous flow reactor. For the method using electrocoagulation, the removal efficiencies in relation to color, turbidity, total organic carbon, chemical oxygen demand and nitrogen removal were 97.2%, 97.0%, 77.5%, 63.3% and 92.2%, respectively. The addition of H2O2 to the beginning of electrocoagulation process in the treatment of dairy effluents did not contribute to an increase in the efficiency of removing organic matter. When applied after an electrocoagulation step, it demonstrated to be efficient, reaching COD removals of 97.7%. Therefore, the electrocoagulation demonstrated to be a technically viable alternative for the treatment of dairy effluent.

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Continuous Flow Reactor for Hydroxylation of Benzene to Phenol by Hydrogen Peroxide

Chinese Journal of Chemical Physics ◽

10.1088/1674-0068/25/05/585-591 ◽

2012 ◽

Vol 25 (5) ◽

pp. 585-591 ◽

Cited By ~ 5

Author(s):

Li Zhang ◽

Hui-hui Liu ◽

Gui-ying Li ◽

Chang-wei Hu

Keyword(s):

Hydrogen Peroxide ◽

Continuous Flow ◽

Flow Reactor ◽

Hydroxylation Of Benzene ◽

Continuous Flow Reactor

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Continuous flow electrocoagulation in the treatment of wastewater from dairy industries

Water Science & Technology ◽

10.2166/wst.2015.620 ◽

2015 ◽

Vol 73 (6) ◽

pp. 1418-1425 ◽

Cited By ~ 10

Author(s):

Toni L. Benazzi ◽

Marco Di Luccio ◽

Rogério M. Dallago ◽

Juliana Steffens ◽

Rúbia Mores ◽

...

Keyword(s):

Continuous Flow ◽

Flow Reactor ◽

Oxygen Demand ◽

Primary Treatment ◽

Electrochemical Treatment ◽

Dairy Wastewater ◽

Hydraulic Residence Time ◽

Microbial Decomposition ◽

Continuous Flow Reactor ◽

A Current

Dairy industry wastewater contains high levels of organic matter, consisting mainly of fat, protein and products of their partial microbial decomposition. In the present study, the use of continuous electrocoagulation is proposed for the primary treatment of dairy wastewater. The electrochemical treatment was carried out in a continuous flow cell with aluminum electrodes. The influence of the voltage, the distance between the electrodes and the hydraulic residence time (HRT) on the process performance was assessed, by measuring the removal of color, turbidity, total organic carbon (TOC) and chemical oxygen demand (COD). The optimum voltage, distance between the electrodes and HRT were 10 V, 1 cm and 90 min, respectively, yielding a current density of 13.3 A.m−2. Under these conditions, removal of color, turbidity, TOC and COD were 94%, 93%, 65% and 69%, respectively, after a steady state was reached in the continuous flow reactor.

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Nitrification and denitrifying phosphorus removal in an upright continuous flow reactor

Water Science & Technology ◽

10.2166/wst.2016.057 ◽

2016 ◽

Vol 73 (9) ◽

pp. 2093-2100 ◽

Cited By ~ 5

Author(s):

Maryam Reza ◽

Manuel Alvarez Cuenca

Keyword(s):

Nutrient Removal ◽

Phosphorus Removal ◽

Continuous Flow ◽

Flow Reactor ◽

Oxygen Demand ◽

Batch Reactors ◽

Sequencing Batch Reactors ◽

Denitrifying Phosphorus Removal ◽

Continuous Flow Reactor ◽

Activated Sludge Processes

Simultaneous nitrification and denitrifying phosphorus removal was achieved in a single-sludge continuous flow bioreactor. The upright bioreactor was aligned with a biomass fermenter (BF) and operated continuously for over 350 days. This study revealed that unknown bacteria of the Saprospiraceae class may have been responsible for the successful nutrient removal in this bioreactor. The successive anoxic–aerobic stages of the bioreactor with upright alignment along with a 60 L BF created a unique ecosystem for the growth of nitrifier, denitrifiers, phosphorus accumulating organisms and denitrifying phosphorus accumulating organisms. Furthermore, total nitrogen to chemical oxygen demand (COD) ratio and total phosphorus to COD ratio of 0.6 and 0.034, respectively, confirmed the comparative advantages of this advanced nutrient removal process relative to both sequencing batch reactors and activated sludge processes. The process yielded 95% nitrogen removal and over 90% phosphorus removal efficiencies.

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Renewable Energy from Agricultural Waste

Revista de Chimie ◽

10.37358/rc.18.6.6325 ◽

2018 ◽

Vol 69 (6) ◽

pp. 1363-1366 ◽

Cited By ~ 1

Author(s):

Stefania Daniela Bran ◽

Petre Chipurici ◽

Mariana Bran ◽

Alexandru Vlaicu

Keyword(s):

Saccharomyces Cerevisiae ◽

Gas Chromatography ◽

Continuous Flow ◽

Laboratory Experiments ◽

Fermentation Process ◽

Flow Reactor ◽

Agricultural Waste ◽

Continuous Flow Reactor ◽

Natural Support ◽

Co2 Flow

This paper has aimed at evaluating the concentration of bioethanol obtained using sunflower stem as natural support, molasses as carbon source and Saccharomyces cerevisiae yeast in a continuous flow reactor. The natural support was tested to investigate the immobilization/growth of S. cerevisiae yeast. The concentration of bioethanol produced by fermentation was analyzed by gas chromatography using two methods: aqueous solutions and extraction in organic phase. The CO2 flow obtained during the fermentation process was considered to estimate when the yeast was deactivated. The laboratory experiments have highlighted that the use of plant-based wastes to bioconversion in ethanol could be a non-pollutant and sustainable alternative.

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