cod analysis Articles

  • Online analysis of TOC, TNb, TP, and COD in water

    The control of waste water treatment plants is of special importance - from an ecological as well as economic point of view. The most common water parameters for controlling and optimization are the total organic carbon (TOC), chemical oxygen demand (COD), total nitrogen bound ( ...


    By LAR Process Analysers AG

  • Water Treatment Optimization - Case Study

    Drinking water treatment in North America has stringent requirements for effluent water quality, with a great amount of attention being drawn to the presence of hazardous disinfection by-products (DBPs) persisting through water distribution systems. The operation of water treatment plants involves addition of various mixing agents to help with coagulation and settling of organics in the raw water ...


    By MANTECH

  • Why is Chemical Oxygen Demand (COD) a useful parameter for drinking water analysis?

    Ask the Expert: COD Analysis for Drinking Water Question: Why is Chemical Oxygen Demand (COD) a useful parameter for drinking water analysis? Answer: At very basic level Chemical Oxygen ...


    By Camlab Limited

  • What is Chemical Oxygen Demand (COD)?

    Chemical Oxygen Demand (COD) analysis is a measurement of the oxygen-depletion capacity of a water sample contaminated with organic waste matter. Specifically, it measures the equivalent amount of oxygen required to chemically oxidize organic compounds in water. Why Measure COD? COD is used as a general indicator of water quality and is an integral part of all water quality ...


    By MANTECH

  • Nanotechnology Provides Alternative Method to Dichromate Based COD Analysis

    Nanotechnologies hold a lot of promise for improving the world and offering revolutionary advancements over traditional technologies that have not changed for decades, including for water quality analysis. Laboratory staff have known for a long time about the potential negative health impacts associated with Chemical Oxygen Demand (COD) testing using the traditional dichromate method, ...


    By Camlab Limited

  • Petrochemical Refinery invests in automated COD analysis system utilizing new PeCOD technology (case study)

    Background  A petrochemical refinery has 6 different wastewater sampling points for effective process control. When there is a problem in effluent COD, samples from all 6 points are needed to determine source of the contamination. Once the contamination source is determined, corrective actions are taken. Problem The current COD dichromate test ...


    By MANTECH

  • What is the challenge with the dichromate COD approach and why is an alternative method required?

    Ask The Expert: What is the challenge with the dichromate COD approach and why is an alternative method required? Answer: The traditional COD analysis approach has been used for decades and is based on the use of potassium dichromate, one of the reagents necessary ...


    By Camlab Limited

  • Ozone Based AOP process for refractory COD reduction in industrial waster water

    Introduction In recent years improvements  in ozone based advanced oxidation technology efficiencies have lowered capital and operating expenses, improving the viability of the use of ozone as the main oxidant. An investigation into alternatives for refractory COD removal which is economically attractive and do not produce sludge lead to an evaluation of ...


    By ESCO International

  • Oxidative degradation of COD in Petrochemical facility using Ozone-based advanced oxidation

    The aim of this study was to investigate the use of ozone-based advanced oxidation processes for the oxidative destruction of COD in a petrochemical facility. Several  AOP experiments were carried out in order to select and optimise the successful treatment option. A LABO3-AOP pilot unit was used where filtered wastewater (COD 1250 ppm) was circulated throughout the AOP reactor and ozone ...


    By ESCO International

  • Reproductive Endocrine Disruption in a Sentinel Species (Chrysemys picta) on Cape Cod, Massachusetts

    Freshwater turtles (Chrysemys picta) were collected from two sites on Cape Cod, MA. One site (Moody Pond), adjacent to the Massachusetts Military Reservation (MMR), was considered potentially impacted by toxic agents deriving from contaminant point sources on the MMR. The second (reference) site (Washburn Pond), to the east of the MMR, was considered not impacted by these pollutants and was ...


    By Springer

  • What are the differences between Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD)?

    Ask the expert: What are the differences between Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD)? Answer: Both COD and BOD test methods aim to give an indication of the amount of pollution in a water sample. COD is the amount of oxygen required to chemically breakdown the pollutants whereas BOD is the amount of oxygen ...


    By Camlab Limited

  • Assessing dry weather flow contribution in TSS and COD storm events loads in combined sewer systems

    Continuous high resolution long term turbidity measurements along with continuous discharge measurements are now recognised as an appropriate technique for the estimation of in sewer total suspended solids (TSS) and Chemical Oxygen Demand (COD) loads during storm events. In the combined system of the Ecully urban catchment (Lyon, France), this technique is implemented since 2003, with more than ...


    By IWA Publishing

  • Statistical optimisation for biological decolourisation and COD removal of screen–printing wastewater using Trametes versicolor

    The conventional treatment methods employed in decolourisation of industrial wastewater are not effective and lead to generation of hazardous sludge. In the present investigation, a systematic study of three important process variables (concentration of initial colour, glucose and ammonium chloride) influencing the decolourisation and Chemical Oxygen Demand (COD) removal in screen–printing ...


    By Inderscience Publishers

  • Model-Based Optimum Design of Sequencing Batch Reactors for Cod and Nitrogen Removal from a Slaughterhouse Wastewater

    ABSTRACTA dynamic model of the activated sludge process was used to analyze and optimize the operation of an SBR treating slaughterhouse wastewater. The existing treatment cycle (duration of fill, aeration, mix, decanting and wasting periods) was found to be inadequate for meeting effluent requirements under a number of different loading scenarios. Modelling analysis indicated that the aeration ...

  • Real Time COD and BOD Monitoring in a Municipal Wastewater Treatment Plant - Case Study

    Introduction A municipal Wastewater Treatment Plant (WWTP) located in the Greater Toronto Area (GTA) currently utilizes Biological Oxygen Demand (BOD) from a 24-hour composite sample to monitor their discharge to Lake Ontario and meet compliance standards. The Challenge The BOD method run on the 24-hour composite from the final effluent of the WWTP is a 5-day ...


    By MANTECH

  • Controlling Parameters in Water Analysis

    The COD (Chemical Oxygen Demand) is one of most important parameters in water analysis. In Germany as in nearly all European countries tax for indirect discharges is based on the COD. Using the oxygen consumption is reasonable in the case of tax because the delay time of waste water in a treatment plant depends mainly on its biological activity. The oxygen consumption again is a degree of ...


    By LAR Process Analysers AG

  • TOC analysis at airports

    As other industrial devices airports have to control their run-off weter for TOC and/or COD. The amount of waste water produced at airports is not negligible: The Frankfurt airport (one of the biggest airports in Europe) has produced 1.63 million cubic meters in 2006, the same amount as a medium-sized city. The sewer system of this airport consists of a 200km tubing system with a low quantity of ...


    By LAR Process Analysers AG

  • Analysis of PeCOD Technology and Comparison to Dichromate Method

    Abstract The main objective of this report was to determine if a correlation exists between peCOD technology and the dichromate method of estimating Chemical Oxygen Demand (COD). Additional investigations described in this report were: to identify whether particle size in water samples affects the estimate of COD obtained by peCOD analysis and, to identify whether peCOD analysis is ...


    By MANTECH

  • Situation analysis of China’s wastewater discharge

    Great progress has been made in reducing China’s water pollution after decades of efforts. From the perspective of wastewater discharge, the situation of wastewater discharge since 1985 is analysed in this study, with importance attached to industrial wastewater, including wastewater from township enterprises, and to municipal domestic wastewater. In general, the total wastewater discharge in ...


    By Inderscience Publishers

  • Water Quality Analysis Safeguarding Families

    Water is intensely purified and treated by water authorities before being ready for thousands of families. Everybody expects clean and safe tap water when turning on their taps. A water quality analysis center in Shanghi, China excels in its water testing and analysis with fully automatic potentiometric titration. Traditional Water Quality Analysis In order to ensure water hygiene and safety ...


    By Mettler - Toledo Int. Inc

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you