Standard Methods for the Examination of Water and Wastewater 5210 BIOCHEMICAL OXYGEN DEMAND (BOD)*#(1) 5220 CHEMICAL OXYGEN DEMAND (COD)*#(2) 5220 A. Introduction Chemical oxygen demand (COD) is defined as the amount of a specified oxidant that reacts with the sample under controlled conditions. The quantity of oxidant consumed is expressed in terms of its oxygen equivalence. Because of its unique chemical properties‚ the dichromate ion (Cr2O72–) is the specified oxidant in Methods
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Biochemical Oxygen Demand (BOD) Biochemical Oxygen Demand‚ BOD‚ as it is commonly abbreviated‚ is one of the most important and useful parameters (measured characteristics) indicating the organic strength of a wastewater. BOD measurement permits an estimate of the waste strength in terms of the amount of dissolved oxygen required to break down the wastewater. The specifics of the analysis are discussed in detail in Standard Methods for the Examination of Water and Wastewater. The BOD test is
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Decolorization and Chemical Oxygen Demand Reduction (COD) of Simulated Textile Wastewater using Fenton’s Reagent Submitted to: Eric Siy COE 5100 – Statistical Research and Design Chemical Engineering Department College of Engineering De La Salle University – Taft‚ Manila by MARIA KATRINA A. PULUTAN MS Chemical Engineering 1st Trimester AY 2010-2011 1. INTRODUCTION Nature is threatened by the environmental contamination caused by the wastewater produced and discharged every day
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Title: Laboratory 2: Measurement of Biochemical Oxygen Demand (BOD) Objective To determine the amount of oxygen necessary for biological oxidation of wastewater effluent and determine the amount of oxygen required by bacteria while stabilizing decomposable organic matter. Methodology Apparatus ; Biochemical Oxygen Demand (BOD) meter‚ Dissolved Oxygen bottle (DO bottle)‚ pipette‚ Teflon tape‚ dilution water‚ incubator machine. Procedure; Add 300 ml dilute water then take DO reading immediately
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Toggle Sidebar Find Previous NextPage: of 5 Tools Zoom Out Zoom InAutomatic ZoomActual SizeFit PageFull Width50%75%100%125%150%200% Chemical Oxygen Demand (COD)Introduction:The Chemical Oxygen Demand (COD) test is the standard method for measuring the amount of pollution in a sample that is unable to be oxidised biologically.Oxidation takes place on both the organic and inorganic component but as the organic component is more dominant‚ it is
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Oxygen in Liquids (DISSOLVED OXYGEN) Dissolved Oxygen – the amount of dissolved oxygen in a body of water as an indication of the degree of the health of water and its ability to support a balanced aquatic ecosystem. Oxygen – is a clear‚ colorless‚ odorless‚ and tasteless gas that dissolves in water. Small but important amounts of it are dissolved in water. OXYGEN: Aquatic Life Depends on it Plants and Animals depend on dissolved oxygen for survival. Lack of dissolved oxygen can cause aquatic
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com/pdfdownload.asp?id=258971862 The rubber additives market is mainly driven by the growth in the demand for automobiles. Rubber additives are used to enhance the properties of rubber used in the manufacture of tires. With the growing population and increased spending by the consumers‚ the demand for automobiles has increased which in turn has led to the increased demand for rubber additives. These chemicals add superior qualities to the rubber. However‚ the growing environmental concerns and the stringent
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AS114103/A1 Date: 24/5/2013 Assignment 1 –Tutorial Questions on Chemical Oxygen Demand (COD) Experiment 1. What is the function of using KHP in the COD test? (2 marks) KHP is used as a control standard because KHP is stable pure organic compounds which have the theoretical value of COD(500ppm)‚ so it can used to gain an idea of how accurate the lab was. 2. Calculate the theoretical oxygen demands(g oxygen/g compound) for glucose and sodium acetate. (5 marks) C6H12O6 + 6O2
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norms High tide v/s low tide discharge + Effluents in ECP Pollutant Effluent discharged (mg/l) GPCB Norm (mg/l) Total Suspended Solids 361 100 Total Dissolved Solids 14458 5000 Chemical Oxygen Demand 1826 250 Biological Oxygen Demand 334 100 NH3-N 387 50 Cyanide 2.857 0.2 Phenols 15.37 1.0 + J Point: Dumping of wastes at J-point into River Mahi estuary The effluents treated sub-optimally were dumped into
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wastes disposed in Gibraltar was the typical for domestic residue. The characteristics of the leachate are presented in Table 1. TABLE 1 TYPICAL COMPOSITION OF THE GIBRALAR LEACHATE - 1985 Parameter Unit Value Biochemical Oxygen Demand (BOD) Chemical Oxygen Demand Totals Solids
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