The influence of reaction conditions in the oxidation of organic compounds of nuclear laundry water by ozone

2010 ◽  
Vol 61 (10) ◽  
pp. 2557-2561 ◽  
Author(s):  
M. K. Vilve ◽  
M. E. T. Sillanpää
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Carbon ◽  
Chemical Oxygen Demand ◽  
Organic Compounds ◽  
Biochemical Oxygen Demand ◽  
Treatment Time ◽  
Oxygen Demand ◽  
Ozone Treatment ◽  
Reaction Conditions ◽  
Oxidation Of Organic Compounds

This paper presents a summary of degrading organic compounds of nuclear laundry water by ozonation in different conditions of pH, hydrogen peroxide and ultraviolet radiation. The degradation of organic compounds was analysed by chemical oxygen demand (COD), total organic carbon (TOC) and biochemical oxygen demand (BOD). The optimal degradation conditions were at pH 7 with ozone, UV radiation and hydrogen peroxide addition. The transfer of ozone increased significantly, thus resulting in decreased treatment time compared to ozone treatment alone. The reductions of COD, TOC and BOD were 46%, 32% and 70%, respectively.

scholarly journals Degradation of Reactive Red 120 dye by a heterogeneous Sono-Fenton process with goethite deposited onto silica and calcite sand

2020 ◽  
Vol 85 (1) ◽  
pp. 125-140
Author(s):  
Soraya Garófalo-Villalta ◽  
Tanya Medina-Espinosa ◽  
Christian Sandoval-Pauker ◽  
William Villacis ◽  
Valerian Ciobotă ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Chemical Oxygen Demand ◽  
Total Organic Carbon ◽  
Organic Compounds ◽  
Biochemical Oxygen Demand ◽  
Oxygen Demand ◽  
Fenton Process ◽  
Reactive Red 120

The degradation of Reactive Red 120 dye (RR-120) in synthetic waters was studied. Two processes were considered: homogeneous sono-Fenton with iron(II) sulfate and heterogeneous sono-Fenton with synthetic goethite and goethite deposited onto silica and calcite sand (modified catalysts GS and GC, respectively). In 60 min of reaction, the homogeneous sono-Fenton process allowed a degradation of 98.10 %, in contrast with 96.07 % for the heterogeneous sono-Fenton process with goethite at pH 3.0. The removal of RR-120 increased when the modified catalysts were used instead of bare goethite. Chemical oxygen demand (COD) and total organic carbon (TOC) measurements showed that the highest TOC and COD removals were achieved with the homogeneous sono-Fenton process. Biochemical oxygen demand (BOD5) measurements allowed confirmed that the highest value of BOD5/COD was achieved with a heterogeneous sono-Fenton process (0.88?0.04 with the modified catalyst GC), demonstrating that the biodegradability of the residual organic compounds was remarkably improved.

scholarly journals Physicochemical analysis of water and sediments of Usuma Dam, Abuja, Nigeria

2020 ◽  
Vol 31 (2) ◽  
pp. 80-87
Author(s):  
Ifenna Ilechukwu ◽  
Tolulope Abisola Olusina ◽  
Odinaka Chidinma Echeta
Keyword(s):  
Particle Size ◽  
Organic Matter ◽  
Organic Carbon ◽  
Chemical Oxygen Demand ◽  
Total Organic Carbon ◽  
Biochemical Oxygen Demand ◽  
Oxygen Demand ◽  
Total Hardness ◽  
Total Organic Matter ◽  
Inorganic Matter

AbstractUsuma Dam is the major source of potable water in the Federal Capital Territory, Abuja, Nigeria. The physicochemical properties of water and sediment of the dam was assessed in this study to determine its quality. Electrical conductivity, pH, nitrate, phosphate, total dissolved solids, total suspended solids, turbidity, dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, chloride, total hardness, phosphate, nitrate and sulfate were determined in the water samples. Total organic matter, total organic carbon and particle size were among the parameters analyzed in sediments. The parameters were within recommended limits except for biochemical oxygen demand and chemical oxygen demand which were more than the recommended limit of 10 mg/L and 30 mg/L respectively. The total organic matter and the total organic carbon in the sediment samples were between 1.56±0.27 – 2.85±0.20 % and 0.13±0.03 – 0.96±0.03 % respectively. The particle size was in the following order: sand > silt > clay. The results of this study confirmed the presence of high organic and inorganic matter in the dam from non-point pollution sources occasioned by storm water from poorly planned settlements around the dam and runoffs from agricultural practices.

Advanced treatment of dyehouse effluents by Fe(II) and Mn(II)-catalyzed ozonation and the H2O2/O3 process

2000 ◽  
Vol 42 (1-2) ◽  
pp. 13-18 ◽  
Author(s):  
I. Arslan ◽  
I. Akmehmet Balcioglu ◽  
T. Tuhkanen
Keyword(s):  
Organic Carbon ◽  
Chemical Oxygen Demand ◽  
Advanced Oxidation Processes ◽  
Treatment Time ◽  
Effective Means ◽  
Oxygen Demand ◽  
Advanced Oxidation ◽  
Oxidation Products ◽  
Advanced Treatment ◽  
Oxidation Processes

Treatment of synthetic dyehouse effluent containing six reactive dyestuffs and their assisting chemicals by O3/Fe(II), O3/Mn(II), and O3/H2O2 advanced oxidation processes was investigated. All oxidation processes were capable of completely decolourizing the wastewater within 30 min. Decolourization proceeded fastest by the O3/Mn(II) process, whereas the O3/H2O2 combination was more efficient in the removal of DOC (Dissolved Organic carbon) and UV254nm which were 11 and 53%, respectively, for one hour treatment time. Application of Fe(II)-catalyzed ozonation provided an effective means of removing colour and COD (Chemical Oxygen Demand) by a five- and nine-fold enhancement, respectively, compared with conventional coagulation applied at the same coagulant doses. Formation of toxic oxidation products was not observed during the course of treatment with all investigated advanced oxidation processes.

scholarly journals Reduction of organic and biological pollutants from affluents of the Ancón wastewater treatment plant using microanobubbles of air and graphene [Reducción de contaminantes orgánicos y biológicos de afluentes de la planta de tratamiento de aguas residuales de Ancón utilizando micronanoburbujas de aire y grafeno]

2020 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Rudy Roxana Ayala Daza ◽  
Palmir Ponte Viera ◽  
Jhonny Valverde Flores
Keyword(s):  
Wastewater Treatment ◽  
Chemical Oxygen Demand ◽  
Biochemical Oxygen Demand ◽  
Wastewater Treatment Plant ◽  
Treatment Time ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Initial Concentration ◽  
Experimental Part ◽  
Thermotolerant Coliforms

The objective of this research was to reduce the organic and biological load of tributaries of the Ancón Wastewater Treatment Plant using microanobubbles of air and graphene. A preliminary sample of the affluent (3L) was taken, which had an initial concentration of Biochemical Oxygen Demand (BOD5) of 410 mg/L, Chemical Oxygen Demand (COD) of 483 mg/L, Thermotolerant Coliforms of 44,000 NMP/100mL and turbidity of 63.33 NTU. The experimental part was carried out with 03 samples of 20 liters with 03 repetitions with a treatment time of 20, 40 and 60 minutes applying air nanobubbles and 6, 12 and 18 grams of graphene respectively. The results of the treated samples were: 87 mg/L representing 78.8% reduction in Biochemical Oxygen Demand (BOD5), 114 mg/L representing 76.4% reduction in Chemical Oxygen Demand (COD), 2,900 NMP/100mL that represents 93.41% reduction of Thermotolerant Coliforms and 12.4 NTU that represents 80.11% reduction of turbidity.

scholarly journals Cobalt(III) Oxidation of Organic Compounds and Its Application to a Determination of Chemical Oxygen Demand at Room Temperature.

1997 ◽  
Vol 13 (4) ◽  
pp. 607-612 ◽  
Author(s):  
Hideji TANAKA ◽  
Hideyoshi MORITA ◽  
Shigeru SHIMOMURA ◽  
Kensaku OKAMOTO
Keyword(s):  
Chemical Oxygen Demand ◽  
Organic Compounds ◽  
Room Temperature ◽  
Oxygen Demand ◽  
Oxidation Of Organic Compounds

scholarly journals KINERJA BIOSAND FILTER BERBAHAN DASAR BATUAN ANDESIT DALAM MENURUNKAN KONSENTRASI BOD DAN COD PADA AIR TANAH DANGKAL

Jurnal Dampak ◽  
2014 ◽  
Vol 11 (1) ◽  
pp. 59
Author(s):  
Tivany Edwin ◽  
Yommi Dewilda
Keyword(s):  
Chemical Oxygen Demand ◽  
Biochemical Oxygen Demand ◽  
Oxygen Demand ◽  
Biosand Filter

Air tanah dangkal merupakan opsi sumber air bersih yang umum digunakan masyarakat. Tingginya kadar Biochemical Oxygen Demand (BOD) dan Chemical Oxygen demand (COD) terkadang ditemukan pada air tanah dangkal yang menandakan tercemarnya air tersebut. Oleh karena itu diperlukan teknologi tepat guna pengolahan air yang relatif murah dan efisien untuk skala rumah tangga masyarakat seperti biosand filter. Penelitian bertujuan untuk menganalisis kinerja biosand filter dalam menurunkan parameter BOD dan COD pada sampel air tanah dangkal dari sumur penduduk. Biosand filter didesain dengan dimensi reaktor 30x30x90 cm dengan perbandingan ketinggian media pasir halus:pasir kasar:kerikil sebesar 50:5:5 cm. Media yang digunakan merupakan batuan andesit yang mudah ditemukan di daerah Sumatra Barat. Debit air yang dialirkan pada biosand filter adalah 0,6 L/menit. Waktu penumbuhan biofilm selama 21 hari dan pengoperasian reaktor selama 14 hari. Setelah dilakukan analisis, reaktor biosand filter mampu menyisihkan parameter BOD dan COD. Efisiensi penyisihan konsentrasi BOD oleh reaktor biosand filter sebesar 75%-87%, dan efisiensi penyisihan konsentrasi COD oleh reaktor biosand sebesar 65%-70%. Maka dapat disimpulkan bahwa reaktor biosand filter cukup efektif dalam menyisihkan parameter BOD dan COD.Kata-kata Kunci : Air Tanah Dangkal, Andesit Biosand Filter, BOD, dan COD,

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