REMOVAL OF DYE AND CHEMICAL OXYGEN DEMAND (COD) REDUCTION FROM TEXTILE INDUSTRIAL WASTEWATER USING HYBRID BIOREACTORS

2014 ◽  
Vol 13 (1) ◽  
pp. 43-50 ◽  
Author(s):  
Ghasem Najafpour Darzi ◽  
Reza Katal ◽  
Hossein Zare ◽  
Seyed Omid Rastegar ◽  
Poorya Mavaddat
Keyword(s):  
Chemical Oxygen Demand ◽  
Industrial Wastewater ◽  
Oxygen Demand ◽  
Cod Reduction

scholarly journals Chemical Oxygen Demand reduction in industrial wastewater using locally isolated bacteria

2014 ◽  
Vol 6 (2) ◽  
Author(s):  
Nor Syamimi Musa ◽  
Wan Azlina Ahmad
Keyword(s):  
Chemical Oxygen Demand ◽  
Industrial Wastewater ◽  
Biological Treatment ◽  
Bacterial Culture ◽  
Oxygen Demand ◽  
Good Alternative ◽  
Cod Reduction ◽  
Demand Reduction ◽  
Conventional Methods ◽  
Industry Wastewater

Wastewater that has been discharged from the pineapple industry contributes to high levels of Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD) and Suspended Solids (SS). The high levels of COD concentrations in wastewater are toxic to biological life and will affect aquatic environment. Currently, there are many methods that have been developed to treat pineapple industry wastewater such as ozonation, reverse osmosis and filtration. However, these conventional methods are costly and generate large amounts of sludge. Biological treatment may be a good alternative since its operational cost is less and it creates an environmental friendly atmosphere compared to the conventional methods. In this study, the effectiveness of COD reduction involving a single bacterial culture D, G and I isolated from a pineapple industry wastewater were used in batch system. The COD reduction of pineapple industry wastewater was carried out using bacterial culture and pellet. The performance of these systems in reducing the COD level was monitored within 3 days. The COD reduction was analyzed using a Hach DR/4000 U spectrophotometer. The bacterial pellet D, G and I showed a maximal COD reduction of 87%, 77% and 94% respectively after 3 days exposure to wastewater. The wastewater treatment using bacterial pellet showed higher COD reduction as compared to treatment using whole bacterial culture. FESEM analysis showed that bacteria D, G and I appeared as rod shaped.

Electrochemical Peroxidation Method for Reduction of Chemical Oxygen Demand (COD) Carbofuran in Furadan 3GR Pesticides

2021 ◽  
Vol 18 (2) ◽  
pp. 181-191
Author(s):  
Ayu Sri Wahyuni ◽  
Suhartana Suhartana ◽  
Damar Nurwahyu Bima
Keyword(s):  
Chemical Oxygen Demand ◽  
Ir Spectrum ◽  
Electrochemical Method ◽  
Oxygen Demand ◽  
Preliminary Test ◽  
Electrochemical Methods ◽  
Optimum Conditions ◽  
Cod Reduction ◽  
Spectrum Measurement ◽  
Measurement Results

Carbofuran is a pollutant compound derived from the pesticide Furadan 3GR which is widely used in agriculture. Various methods of carbofuran degradation have been carried out, one of which is the conventional electrochemical method. This study used an electrochemical peroxidation process to degrade Carbofuran in the pesticide Furadan 3GR. This study aims to determine the optimum conditions (time, Na2SO4 concentration, and volume addition of H2O2) for electrochemical peroxidation and to compare the effectiveness of electrochemical and electrochemical peroxidation methods by measuring the parameter of carbofuran COD reduction. The significance of the electrochemical peroxidation method and the conventional electrochemical method was compared as a preliminary test. The COD reduction of Carbofuran using traditional electrochemical methods and electrochemical peroxidation was 45.76% and 88.70%, respectively. Batch carbofuran electrochemical peroxidation process was accomplished to ascertain the optimum conditions under various operation times, the concentration of Na2SO4, and the additional volume of H2O2. The largest COD reduction of 93.78% was obtained at 10 minutes, 75 mM Na2SO4, and 2 mL H2O2. The UV-Vis spectrophotometric absorption of Carbofuran at a wavelength of 274 nm was significantly reduced from 1.377 to 0.131 at optimum conditions. The IR spectrum measurement results indicate a reduction in absorbance for the N-H group (3383 cm-1) and the C=O group (1643 cm-1) at optimum conditions. Overall, the electrochemical peroxidation process proved to be an appropriate technique for COD reduction of Carbofuran in Furadan 3GR pesticides.

Bioremoval of textile dyes with different chemical structures by Aspergillus versicolor in molasses medium

2012 ◽  
Vol 66 (10) ◽  
pp. 2177-2184 ◽  
Author(s):  
Burcu Ertit Taştan ◽  
Sevgi Ertuğrul Karatay ◽  
Gönül Dönmez
Keyword(s):  
Chemical Oxygen Demand ◽  
Laccase Activity ◽  
Oxygen Demand ◽  
Aspergillus Versicolor ◽  
Cod Reduction ◽  
Chemical Structures ◽  
Ph Values ◽  
Optimum Ph ◽  
Aspergillus Sp

Bioremoval of 17 dyes with different chemical structures by Aspergillus versicolor was detected in this study. Maxilon Red GRL (MR-GRL), Everdirect Fast Black VSF (EFB-VSF) and Brillant Blue R (BB-R) were removed better by fungal mycelia. Optimum pH values were found as 6 for all three dyes. In further experiments in the highest dye concentrations tested in this study, 58.3, 100 and 49% removal yields and 14.8, 12.6, 9.0 qm values were found for MR-GRL, EFB-VSF and BB-R, respectively. Chemical oxygen demand (COD) reduction after seven days of incubation period and role of laccase activity of Aspergillus sp. were also investigated. COD reduction and laccase activities were 55.6% and 2.93 U/mL for MR-GRL, 90.7% and 3.0 U/mL for EFB-VSF and 69.0% and 1.79 U/mL for BB-R, respectively. According to these results A. versicolor deserves notable attention for removal of these dyes in wastewater effluents.

DETERMINATION OF CHEMICAL OXYGEN DEMAND IN URBAN AND INDUSTRIAL WASTEWATER USING MICROWAVE SAMPLE DIGESTION

2002 ◽  
Vol 33 (15-18) ◽  
pp. 3443-3447 ◽  
Author(s):  
Ignacio Gómez ◽  
Roberto Ivorra ◽  
Ana Pérez ◽  
Ana María Santacruz ◽  
Juan Navarro ◽  
...  
Keyword(s):  
Chemical Oxygen Demand ◽  
Industrial Wastewater ◽  
Oxygen Demand ◽  
Sample Digestion

Whey decontamination by kefir immobilized on grape stalks

2016 ◽  
Vol 27 (2) ◽  
pp. 167-177
Author(s):  
Magdalini Soupioni ◽  
Alexandra Psarologou
Keyword(s):  
Chemical Oxygen Demand ◽  
Biochemical Oxygen Demand ◽  
Uptake Rate ◽  
Design Methodology ◽  
Alcoholic Fermentation ◽  
Oxygen Demand ◽  
Content Type ◽  
Cod Reduction ◽  
First Time ◽  
Grape Stalks

Purpose – The purpose of this paper is to evaluate the possibility of a new biocatalyst prepared by kefir cells immobilization on grape stalks (GS) to reduce quickly and efficiently the Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) of the waste whey during its fermentation producing potable ethanol. Design/methodology/approach – Many batch whey fermentations were carried out in order the effect of various conditions (pH, temperature) on 14C-labeled lactose uptake rate by the GS-immobilized kefir cells and consequently on fermentation rate as well as on ethanol production and whey BOD and COD reduction to be determined. Findings – It has been illustrated that GS-biocatalyst was suitable for whey BOD and COD reduction by about 32 and 25 percent, respectively during whey alcoholic fermentation at 30°C and pH 5.5 in only ten hours, producing about 3.30 percent w/v of ethanol. Originality/value – The findings of this research may enhance the existing literature on whey exploitation, for the first time focussing on the use of cheap and abundant GS as support for kefir immobilization during whey fermentation, which is potentially acceptable by industries in order to reduce fast and easily the whey polluting load and produce ethanol.

scholarly journals Removal of Color and Chemical Oxygen Demand Using a Coupled Coagulation-Electrocoagulation-Ozone Treatment of Industrial Wastewater that Contains Offset Printing Dyes

2017 ◽  
Vol 58 (3) ◽  
Author(s):  
Gabriela Roa-Morales ◽  
Carlos Barrera-Díaz ◽  
Patricia Balderas-Hernández ◽  
Francisco Zaldumbide-Ortiz ◽  
Horacio Reyes Perez ◽  
...  
Keyword(s):  
Chemical Oxygen Demand ◽  
Industrial Wastewater ◽  
Oxygen Demand ◽  
Color Removal ◽  
Sequential Treatment ◽  
Ozone Treatment ◽  
Optimal Conditions ◽  
Offset Printing ◽  
Printing Processes

Industrial offset printing processes generate wastewater with highly colored obtaining values of 5x10<sup>6</sup> Pt-Co units and great values of chemical oxygen demand (COD) 5.3x10<sup>-5</sup> mg L<sup>-1</sup>. Thus, conventional technologies such as biologicals treatment fail in reaching the discharge limits. In this research, a sequential treatment was applied: coagulation with aluminum hydroxychloride (AHC), electrocoagulation with Al anodes and finally ozonation. Optimal conditions are found when adding 20 mg L<sup>-1</sup> AHC, followed by electrocoagulation at 4 A for 50 min, and finally alkaline ozonation for 15 min, resulting in an overall color removal of 99.99% color and 99.35% COD.

scholarly journals The effect of hydrothermal treatment on industrial wastewater: Hungary as a case study

2020 ◽  
Author(s):  
Mahmood Al Ramahi ◽  
Sándor Beszédes ◽  
Gábor Keszthelyi-Szabó
Keyword(s):  
Chemical Oxygen Demand ◽  
Hydrothermal Treatment ◽  
Industrial Wastewater ◽  
Oxygen Demand ◽  
Cod Removal ◽  
Sodium Absorption ◽  
Treatment Technique ◽  
Sodium Absorption Ratio ◽  
High Concentrations ◽  
Wastewater Samples

AbstractIndustrial wastewater is a growing environmental challenge due to its high concentrations of organics and its limited biological degradability. Up to date, however, no published work discussed industrial wastewater characterization, which is the focus of this study. Moreover, the effect of hydrothermal treatment on the chemical oxygen demand (COD) removal and the soluble chemical oxygen demand (SCOD) release was investigated in this work. Wastewater samples were collected from different industrial sites and characterized in order to determine their initial properties. It was summarized that the salinity of wastewater estimated by EC was relatively low, and its pH values were in the acceptable range. On the other hand, however, high values of sodium absorption ratio (SAR) were obtained in all samples post to hydrothermal treatment. Nonetheless, our results revealed higher SCOD release post to hydrothermal treatment suggesting better efficiency of COD removal obtained by this treatment technique.

scholarly journals APPLICATION OF RESPONSE SURFACE METHODOLOGY (RSM) - REDUCTION OF INDUSTRIAL WASTEWATER CHEMICAL OXYGEN DEMAND

2017 ◽  
Vol 5 ◽  
pp. 1226-1232 ◽  
Author(s):  
Emmanuel Kweinor Tetteh ◽  
Sudesh Rathilal
Keyword(s):  
Response Surface Methodology ◽  
Wastewater Treatment ◽  
Chemical Oxygen Demand ◽  
Response Surface ◽  
Industrial Wastewater ◽  
Oxygen Demand ◽  
Chemical Oxygen Demand Removal ◽  
Oil Refineries ◽  
Study Results ◽  
Input Variables

Industrial waste oil in water from oil refineries and petrochemical processing poses a major environmental concern. Environmental pollution from these wastewaters is increasing and will continue to rise due to a growing demand for petrochemical products and energy. The composition of these industrial wastes varies from location to location as well as with manufacturing processes. In terms of water quality issues, chemical oxygen demand is considered one of the most problematic in oil refinery wastewater treatment. This study applies the response surface methodology to obtain a response model for industrial wastewater treatment. Operating parameters are optimized to enhance the treatment performance. The study, focusing on the effects of input variables for chemical oxygen demand removal, was experimentally carried out using dissolved air floatation jar tests. The experimental matrix incorporated the Box-Behnken design in the response surface methodology. In addition, the procedure evaluated the effect of the input variables and their interactions to obtain the optimum condition for the extent of efficiency. The results show that the chemical oxygen demand removal was sensitive to the effect of the input variables and their interactions. The statistical analysis established that the quadratic model was highly significant with a low probability (< 0.0001), indicating that the correlated regression scattering was unlikely random. The predicted model results corresponded well to the experimental results, with a coefficient of determination close to 1.0. The response surface of the model is presented in three-dimensional plots. These study results show that the addition of a coagulant to remove chemical oxygen demand is effective under acidic conditions when response surface methodology is applied.

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