Multistage treatment of industrial ethylene glycol (EG) effluent: integrating chemical extraction, coagulation/precipitation, and decolouration for enhanced wastewater remediation. [PDF]
Sci RepMahmoud AS +3 more
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Study on the spatial distribution characteristics of microbial communities and their environmental driving factors in Bing'an Reservoir after initial impoundment. [PDF]
Front MicrobiolLiu L +5 more
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Modification of Heterogeneous Catalyst Support with Hydrogen Peroxide and Its Application in the Degradation of Methylene Blue Wastewater. [PDF]
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Chemical oxygen demand (COD) using microwave digestion
Water Research, 1989Abstract A new approach to determine the Chemical Oxygen Demand (COD) using a microwave digestion to replace the conventional time consuming reflux method is proposed. The procedure uses a microwave oven for the digestion of small volumes of sample (from 500 up to 2000 μ1), in a completely closed 60 ml Teflon vessel. For samples showing COD values up
Jarbas J R Rohwedder, Wilson F Jardim
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This work was to give a comprehensive estimation for the chemical compositions contributable to COD of the produced water treatment system. For this purpose, the wastewater samples were collected from an onshore wastewater treatment plant. The chemical compositions of the wastewater were investigated, and the COD contributed by each component was ...
Xiulin Wang
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Worldwide, the standard methods for the determination of the important wastewater parameter chemical oxygen demand (COD) are still based on the use of the hazardous chemicals, mercury sulfate and chromium(VI). However, due to their properties they are meanwhile classified as "priority pollutants" and shall be phased out or banned in the frame of REACH (
Müfit Bahadir
exaly +3 more sources
A solid chemical oxygen demand (COD) method for determining biomass in waste waters
Water Research, 1996Abstract A method of biomass determination similar to volatile suspended solids (VSS) that used chemical oxygen demand (COD) as a detection method instead of gravimetric methods is described. The “solid COD” method has a strong correlation with VSS for biomass at different stages of growth on different wastewaters including municipal sewage and ...
J N Saddler
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This study proposes a modification to the standard method for the determination of the chemical oxygen demand of samples with a salinity up to 40 g NaCl/L and low organic concentrations (20-230 mg COD/L). The masking of chloride by the use of a HgSO(4):Cl ratio of 20:1 prior to digestion, and the use of 3g K(2)Cr(2)O(7)/L in the digestion solution ...
Ioannis Vyrides +2 more
exaly +4 more sources
Prediction of Chemical Oxygen Demand (COD) Based on Wavelet Decomposition and Neural Networks
Clean - Soil, Air, Water, 2007AbstractThe chemical oxygen demand (COD) parameter of a wastewater treatment plant is predicted based on wavelet decomposition, entropy, and neural networks (NN) for rapid COD analysis. This paper also describes the usage of wavelet and NNs for parameter prediction. Data from a wastewater treatment plant in Malatya, Turkey, were used.
Yakup Demir +2 more
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Silver recovery and chemical oxygen demand (COD) removal from waste fixer solutions
Applied Energy, 2012Abstract This study focused on the silver recovery from waste fixer solutions by electrolysis under different experimental conditions. During an 8 h electrolysis procedure, the silver recovery efficiencies were 10.57%, 11.75%, 45.5%, 62.68%, and 83.88% for electric currents of 0.1 A, 0.3 A, 0.5 A, 0.7 A, and 0.9 A, respectively.
Ming-Hsun Lee, Jhao-Min Jiang
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