A shift from chemical oxygen demand to total organic carbon for stringent industrial wastewater regulations: Utilization of organic matter characteristics

2022 ◽  
Vol 305 ◽  
pp. 114412
Author(s):  
Ji Won Park ◽  
Sang Yeob Kim ◽  
Jin Hyung Noh ◽  
Young Ho Bae ◽  
Jae Woo Lee ◽  
...  
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Chemical Oxygen Demand ◽  
Total Organic Carbon ◽  
Industrial Wastewater ◽  
Oxygen Demand

Humus transformation at the bank filtration water plant

1994 ◽  
Vol 30 (10) ◽  
pp. 179-187 ◽  
Author(s):  
I. T. Miettinen ◽  
P. J. Martikainen ◽  
T. Vartiainen
Keyword(s):  
Organic Matter ◽  
Surface Water ◽  
Organic Carbon ◽  
Chemical Oxygen Demand ◽  
Total Organic Carbon ◽  
Lake Water ◽  
Oxygen Demand ◽  
Bank Filtration ◽  
Water Plant

Transformations in the amount and quality of organic matter (humus) during bank filtration of surface water were studied by analyzing the changes in total organic carbon (TOC), non-purgeable organic carbon (NPOC), chemical oxygen demand (COD), color of water, and UV absorbing humus fractions. The amount of organic matter expressed as TOC, NPOC, and COD depended on temperature and filtration distance from lake water. The color of water and the UV absorbing humus peaks presenting different humus molecule fractions decreased more effectively than other parameters measuring the amount of organic matter in water. The ratio of COD to TOC decreased when the filtration distance of water increased. Our observations indicated that bank filtration of humus-rich lake water changed more the quality of organic matter than its total amount.

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.

scholarly journals Taguchi Method and Response Surface Methodology in the Treatment of Highly Contaminated Tannery Wastewater Using Commercial Potassium Ferrate

Materials ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 3784 ◽  
Author(s):  
Violetta Kozik ◽  
Krzysztof Barbusinski ◽  
Maciej Thomas ◽  
Agnieszka Sroda ◽  
Josef Jampilek ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Organic Carbon ◽  
Taguchi Method ◽  
Chemical Oxygen Demand ◽  
Total Organic Carbon ◽  
Response Surface ◽  
Suspended Solids ◽  
Oxygen Demand ◽  
Tannery Wastewater ◽  
Potassium Ferrate

The potential implementation of Envifer®, a commercial product containing potassium ferrate (40.1% K2FeO4), for the purification of highly contaminated tannery wastewater from leather dyeing processes was proposed. The employment of the Taguchi method for optimization of experiments allowed the discoloration (98.4%), chemical oxygen demand (77.2%), total organic carbon (75.7%), and suspended solids (96.9%) values to be lowered using 1.200 g/L K2FeO4 at pH 3 within 9 min. The application of the central composite design (CCD) and the response surface methodology (RSM) with the use of 1.400 g/L K2FeO4 at pH 4.5 diminished the discoloration, the chemical oxygen demand, the total organic carbon, and suspended solids within 9 min. The Taguchi method is suitable for the initial implementation, while the RSM is superior for the extended optimization of wastewater treatment processes.

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.

Effect of commercial xylanases applied at extreme conditions in a eucalyptus pulp mill

TAPPI Journal ◽  
2012 ◽  
Vol 11 (10) ◽  
pp. 53-59 ◽  
Author(s):  
URSULA FILLAT ◽  
M. BLANCA RONCERO ◽  
ALEXANDRE BASSA ◽  
VERA MARIA SACÓN
Keyword(s):  
Organic Carbon ◽  
Chemical Oxygen Demand ◽  
Total Organic Carbon ◽  
Control Process ◽  
Oxygen Demand ◽  
Pulp Mill ◽  
Kappa Number ◽  
Control Treatment ◽  
Extreme Conditions ◽  
Eucalyptus Pulp

In this study, we examined the effect of treating eucalyptus pulp with various commercial xylanases to identify the most effective enzyme for use under the industrial bleaching conditions used at the Jacareí mill of the Brazilian firm Fibria, which include a high pH and temperature. Based on the results, the use of two of the nine enzymes studied reduced the kappa number by 1.5 units, increased brightness by 2.5% ISO, and decreased hexenuronic acids (HexA) content by more than 10 μmol/g relative to a control treatment in the absence of enzyme. The most marked changes in brightness were observed on application of an oxidative D stage to enzyme-treated pulp samples. Finally, the chemical oxygen demand (COD), total organic carbon (TOC), color, and turbidity of the effluents obtained at the end of the processes involving the enzymes were all higher than in the control process.

scholarly journals Study of Catalysts’ Influence on Photocatalysis/Photodegradation of Olive Oil Mill Wastewater. Determination of the Optimum Working Conditions

Catalysts ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 554
Author(s):  
Gassan Hodaifa ◽  
Cristina Agabo García ◽  
Rafael Borja
Keyword(s):  
Phenolic Compounds ◽  
Organic Carbon ◽  
Chemical Oxygen Demand ◽  
Total Organic Carbon ◽  
Oxygen Demand ◽  
Total Carbon ◽  
Total Phenolic ◽  
H2o2 Concentration ◽  
Total Phenolic Compounds ◽  
Olive Oil Mill Wastewater

The high production of raw olive oil mill wastewater (OMW) is a current environmental problem due to its high organic load and phenol compounds. In this work, photo-Fenton reaction as an advanced oxidation process has been chosen for OMW treatment. In this sense, different iron salts (FeCl3, Fe2(SO4)3, FeSO4·7H2O, and Fe(ClO4)3) as catalysts were used in order to compare their effects on treatment. For each catalyst, different H2O2 concentrations (2.5, 5.0, 7.5, 10.0, 15.0, 20.0, and 30.0%, w/v) as oxidizing agents were tested. The common experimental conditions were temperature 20 °C, the catalyst/H2O2 ratio = 0.03, pH = 3, and ultraviolet light. The Lagergren kinetic model, in cases of total organic carbon removal, for the best H2O2 concentration per catalyst was used. During the experiments, the water quality was determined by measuring the removal percentages on chemical oxygen demand, total carbon, total organic carbon, total nitrogen, total phenolic compounds, total iron, turbidity and electric conductivity. The best catalyst was FeCl3 and the optimum H2O2 concentration was 7.5% (w/v). At these optimal conditions, the removal percentages for chemical oxygen demand, total phenolic compounds, total carbon, total organic carbon and total nitrogen were 60.3%, 88.4%, 70.1%, 63.2% and 51.5%, respectively.

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