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.

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

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.

Study on the Photochemical Decolorization of Orange II by Natural Goethite

2013 ◽  
Vol 821-822 ◽  
pp. 480-483
Author(s):  
Wei Li Zhou ◽  
Wei Ding ◽  
Jie Kuang ◽  
Long Chen ◽  
Jin Jun Li
Keyword(s):  
Reaction Mechanism ◽  
Organic Carbon ◽  
Optimum Condition ◽  
Chemical Oxygen Demand ◽  
Total Organic Carbon ◽  
Pyruvic Acid ◽  
Oxygen Demand ◽  
Orange Ii ◽  
Ph Values ◽  
Decolorization Efficiency

The decolorization of Orange II in goethite/UV system was investigated. It was discovered that the optimum condition is: pH=3, [α-FeOOH]=0.5 g/L, [Orange II]=10 mg/L. Furthermore, the absorption of Orange II on goethite, and the effect of pH values, goethite dosage and carboxylate on the decolorization were investigated. The decolorization efficiency was 90% after 6h irradiation when the concentration of pyruvic acid was 1.0mmol/L, α-FeOOH concentration was 0.3 g/L, and Orange II concentration was 10 mg/L at pH 3.0. Besides, total organic carbon (TOC) and chemical oxygen demand (COD) were determined, and a possible reaction mechanism was prompted as well.

scholarly journals ANALISIS KEBUTUHAN OKSIGEN UNTUK DEKOMPOSISI BAHAN ORGANIK SEDIMEN DI KAWASAN MANGROVE DESA BEDONO DEMAK

2016 ◽  
Vol 5 (4) ◽  
pp. 285-292
Author(s):  
Mia Arista Sari ◽  
Pujiono Wahyu Purnomo ◽  
Haeruddin Haeruddin
Keyword(s):  
Organic Matter ◽  
Oxygen Demand ◽  
Sedimentary Organic Matter ◽  
Oxygen Requirement ◽  
Ph Values ◽  
Randomized Design ◽  
Decomposition Of Organic Matter ◽  
Completely Randomized Design ◽  
Organic Deposits

ABSTRAK Salah satu peran penting mangrove bagi kehidupan biota akuatik adalah sebagai penyedia nutrien dari bahan organik yang dihasilkan. Proses dekomposisi bahan organik membutuhkan oksigen dan bantuan bakteri. Apabila kadar oksigen berkurang maka dapat mempengaruhi proses dekomposisi dan akhirnya dapat berpengaruh terhadap kehidupan bentos yang ada. Tujuan dari penelitian adalah  mengetahui kebutuhan oksigen yang digunakan dalam proses dekomposisi bahan organik pada kawasan mangrove. Penelitian bersifat eksperimental terhadap deposit bahan organik. Penelitian mengacu pada rancangan acak lengkap dengan 3 perlakuan (deposit organik mangrove padat, sedang, dan jarang) yang masing – masing diulang 3 kali. Penelitian dilakukan di kawasan mangrove desa Bedono, Demak. Peubah utama yang diukur adalah Disolved Oxygen, bahan organik sedimen secara berkala pada jam ke- 0, 12, 24, 36, 48, 60 dan 66. Peubah tambahan yang diukur adalah kelimpahan bakteri. Diukur penurunan Disolved Oxigen pada waktu tertentu. Diukur pula nilai bahan organik sedimen dan kelimpahan koloni bakteri. Hasil yang didapat yaitu nilai kebutuhan oksigen sedimen tertinggi pada stasiun 1 dengan kisaran 1,3 – 3,5. Nilai kebutuhan oksigen sedimen pada stasiun 2 berkisar antara 1,2 – 2,2 dan nilai kebutuhan oksigen sedimen pada stasiun 3 berkisar antara 0,8 - 2,7. Hasil kelimpahan koloni bakteri pada stasiun 1 berkisar antara 1 x 1011 – 1,5 x 1011Cfu/ml. Stasiun 2 berkisar antara 2 x 1011 - 22 x 1011Cfu/ml dan stasiun 3 berkisar antara 1 x 1011 - 2 x 1011Cfu/ml. Kualitas perairan seperti temperatur berikisar antara 27 - 32 ºC. Nilai salinitas beriksar antara 25 - 29‰ dan nilai pH berkisar antara 7 - 8. Kata kunci: Oksigen; Bahan Organik; Sedimen; Dekomposisi ABSTRACT One important role of mangrove for aquatic biota is a provider of nutrients from organic matter produced. The process of decomposition of organic matter need oxygen and help the bacteria. When oxygen levelsdecreases, it can affect the decomposition process and can ultimately affect the existing benthic life. The purpose of the research was to determine the need of oxygen used in the decomposition of organic matter in the mangrove areas. It is a experimental research on the deposit of organic material. The research refers to a completely randomized design with 3 treatments (dense mangrove organic deposits, medium, and rare) that eachs repeated three times. Research conducted in the mangrove areas Bedono village, Demak. The main variables measured were Disolved Oxygen, sedimentary organic matter on a regular basis on the hour 0, 12, 24, 36, 48, 60 and 66. Additional variables that measured the abundance of bacteria.MeasuredDisolvedOxigen decline at a certain time. Measured the value of sedimentary organic matter and the abundance of bacterial colonies. The result is the highest value of the oxygen requirement of sediment at station 1 is in the range of 1,3 to 3,5. The value of the oxygen requirement of sediment at station 2 ranged from 1,2 to 2,2 and the value ofsediment oxygen demand of the three stations ranged from 0,8 to 2,7. The result of the abundance of bacteria colonies from the at station 1 range from 1 x 1011 to 1,5 x 1011Cfu/ml. Station 2 ranging from 2 x 1011 -22 x 1011Cfu/ml and three stations ranged between 1 x 1011 -2 x 1011Cfu/ml. Water quality  such as temperature ranged from 27 - 32 ºC. Salinity value ranged from 25 - 29 ‰ and pH values ranged from 7-8.                                                                                                                              Keywords: Oxygen; Organic Matter; Sediment; Decompotition

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 Advanced Oxidation Processes and Nanofiltration to Reduce the Color and Chemical Oxygen Demand of Waste Soy Sauce

2018 ◽  
Vol 10 (8) ◽  
pp. 2929 ◽  
Author(s):  
Hyun-Hee Jang ◽  
Gyu-Tae Seo ◽  
Dae-Woon Jeong
Keyword(s):  
Hydrogen Peroxide ◽  
Chemical Oxygen Demand ◽  
Advanced Oxidation Processes ◽  
Oxygen Demand ◽  
Color Removal ◽  
Soy Sauce ◽  
Treatment Efficiency ◽  
Cod Reduction ◽  
Oxidation Processes ◽  
Oxidation Efficiency

Currently, the ozone (O3) oxidation efficiency in the treatment of waste soy sauce provides 34.2% color removal and a 27.4% reduction in its chemical oxygen demand (COD). To improve the O3 oxidation efficiency, hydrogen peroxide (H2O2) is used to cause a H2O2/O3 process. In H2O2/O3 process experiments, a previously optimized pH of 11 and applied O3 dose of 50 mg L−1 were used and the H2O2/O3 ratio was varied between 0.1 and 0.9 in intervals of 0.2. The results show that an H2O2/O3 ratio of 0.3 results in the highest efficiencies in terms of color removal (51.6%) and COD reduction (33.8%). Nanofiltration (NF) was used to pretreat the waste soy sauce to improve color removal and COD reduction. The results showed that NF with an NE-70 membrane results in 80.8% color removal and 79.6% COD reduction. Finally, the combination of NF and H2O2/O3 process resulted in the best treatment efficiency: 98.1% color removal and 98.2% COD reduction. Thus, NF & H2O2/O3 process can be considered as one of the best treatment methods for waste soy sauce, which requires high intrinsic color removal and COD reduction efficiencies.

Wet Air Oxidation of Toxic Industrial Effluents

1989 ◽  
Vol 21 (4-5) ◽  
pp. 289-295 ◽  
Author(s):  
J. Kálmán ◽  
Z. Izsáki ◽  
L. Kovács ◽  
A. Grofcsik ◽  
I. Szebényi
Keyword(s):  
Activation Energy ◽  
Chemical Oxygen Demand ◽  
Reaction Rate ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Industrial Effluents ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Cod Reduction ◽  
Process Wastewater

The disposal of process wastewater from a wood carbonization factory was studied in a laboratory batch reactor. Chemical oxygen demand (COD) reduction of 92 - 96% was achieved for samples with initial COD concentrations of more than 100 g/l. The samples subjected to wet air oxidation showed no toxic effects in toxicology tests and were readily biodegradable. Effluent containing cyanide was also subjected to wet air oxidation, and a COD reduction of 75% and cyanide removal of 99.99997% was attained. The reaction rate and activation energy of cyanide hydrolysis were determined.

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.

Sign in / Sign up

Export Citation Format

Share Document