COD test Articles
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Case Study: Containerboard Mill sees Rapid ROI for Fast BOD/COD Results
Up against their BOD permit limit, the Rand-Whitney Containerboard mill in Montville, Connecticut was proactively seeking solutions that would enable them to monitor their production processes more closely with the goal to identify sources of high wastewater loading and make improvements to drive BOD down for compliance assurance.Reliance upon COD grab sample testing to aid them in understanding ...
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Improved UV/O3 method for measuring the chemical oxygen demand
We improved the ultraviolet (UV)/O3-based method for measuring chemical oxygen demand (COD) in water. An on-line COD monitoring device was developed and the UV/O3 method was used to oxidize sample solutions. A model was established by using support vector machines (SVM) algorithm to estimate dissolved oxygen and CO2 in solutions. Based on the measured data by each sensor during the oxidation ...
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The highest inhibition coefficient of phenol biodegradation using an acclimated mixed culture
In this study a membrane biological reactor (MBR) was operated at 25 ± 1 °C and pH = 7.5 ± 0.5 to treat synthetic wastewater containing high phenol concentrations. Removal efficiencies of phenol and chemical oxygen demand (COD) were evaluated at four various hydraulic retention times (HRTs) of 24, 12, 8, and 4 hours. The removal rate of phenol (5.51 kg-Phenol kg-VSS−1 d−1), observed at HRT of ...
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Case Study: French Fry Manufacturer
Fry manufacturer Pilot Study. Laboratory tests conducted: COD, TSS, TDS, FOG, Total P, TKN, Temperature, Dissolved Oxygen, and pH. Where possible, these values are compared to the discharge water from the ...
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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 for dichromate COD (CODCr) analysis. Dichromate is listed as a “Substance of Very High Concern” on the Annex XIV list of ...
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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, however ...
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Oxidation of cosmetic wastewaters with H2O2 using a Fe/γ-Al2O3 catalyst
A catalyst based on Fe supported on γ-Al2O3 has been prepared and tested for catalytic wet peroxide oxidation (CWPO) of cosmetic wastewaters. The influence of the main operating conditions (space-time, temperature, and H2O2 dose) have been investigated. Working with this self-made Fe/γ-Al2O3 catalyst at 85°C, with a space-time of 9.4 kgcat h/kgCOD and a dose of H2O2, corresponding to 0.5 times ...
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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 & ...
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Photolytic degradation of chlorophenols from industrial wastewaters by organic oxidants peroxy acetic acid, para nitro benzoic acid and methyl ethyl ketone peroxide: identification of reaction products
In this investigation, chlorophenol (CP) containing industrial wastewater was remediated by ultraviolet irradiation in conjunction with organic oxidants, peroxy acetic acid (PAA); para nitro benzoic acid (PNBA); and methyl ethyl ketone peroxide (MEKP). CP mineralization was studied with regard to chemical oxygen demand (COD) and chloride ion release under identical test conditions. COD ...
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Toxicity Assessment Using a Dilution Series
Toxicity, or more appropriately, inhibition, is a measure of the interference of a compound or compounds with biodegradation. Since inhibition usually is expressed as the interference with bioconversion of an oxygen-consuming reaction – or gas producing reaction in the case of anoxic or anaerobic reactions – it is essential that a biodegradable substrate be present when assessing toxicity of ...
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Buy Smarter – what questions should you ask when buying a Spectrophotometer?
Spectrophotometers are relied on by a wide range of laboratories, for tests ranging from specific parameters, like chlorine or metals concentrations, right through to complex analyses of reaction kinetics. When choosing a spectrophotometer the range of specifications and price is vast, so take the time to list the features you need before you buy and make sure you choose the right one. Water ...
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An Interview With Flying Monkeys Craft Brewery
Craft breweries can produce five to 10 litres of wastewater for every litre of beer that they package and sell. High in organic matter and suspended solids, the wastewater’s impact can be equivalent to adding another small town to a municipality’s water treatment burden. It’s also a challenge for brewers when they must pay water consumption surcharges and find ways to optimize ...
By MANTECH Inc.
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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 required to do this biologically through micro-organisms. ...
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Rapid BOD/COD Test Meters, New Online Monitoring Solutions and 2022 Outlook from Real Tech
Water and Wastewater Management Just Got Easier. In 2021, Real Tech continued to innovate creating the world’s most advanced multiple UV/VIS LED water quality monitoring and testing platform. Our innovative technologies allowed us to take advantage of the benefits of utilizing multiple ultraviolet and visible LEDs within our new dedicated platform of real-time sensors and portable field ...
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Mexican Food Manufacturer
A large manufacturer of frozen Mexican food entrees in California was paying extremely high surcharges on their wastewater discharge due to the COD, TSS and FOG levels. Laboratory testing with Floccin 1105 showed that the results could drastically reduced. The following shows the reduction accomplished in using the Floccin ...
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Ontario's MANTECH is Making Water Monitoring More Efficient for Global Firms
“Sustainability is not an option, it is an obligation”- Robert Mennegotto, President and CEO of MANTECH It’s been a remarkable journey for MANTECH, an Ontario-based manufacturer of water testing technology. From a very humble start in 2010, its revolutionary technology is now being used in water testing laboratories and industrial and water plants in 45 countries, as 75% of ...
By MANTECH Inc.
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Controlling the COD removal of an A-stage pilot study with instrumentation and automatic process control
The pursuit of fully autotrophic nitrogen removal via the anaerobic ammonium oxidation (anammox) pathway has led to an increased interest in carbon removal technologies, particularly the A-stage of the adsorption/bio-oxidation (A/B) process. The high-rate operation of the A-stage and lack of automatic process control often results in wide variations of chemical oxygen demand (COD) removal ...
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Energy efficient aeration of wastewaters from the pulp and paper industry
More than 50% of the electrical power needed to treat pulp and paper industry effluents is used for aeration in biological treatment stages. A large share of the oxygen that passes through the wastewater is not consumed and will be found in the off-gas. Energy can be saved by aerating under conditions where the oxygen transfer is most efficient, for example at low concentrations of dissolved ...
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Laboratory-scale membrane up-concentration and co-anaerobic digestion for energy recovery from sewage and kitchen waste
This study assessed an alternative concept for co-treatment of sewage and organic kitchen waste in Vietnam. The goal was to apply direct membrane filtration for sewage treatment to generate a permeate that is suitable for discharge. The obtained chemical oxygen demand (COD) concentrations in the permeate of ultrafiltration tests were indeed under the limit value (50 mg/L) of the local ...
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Membrane bioreactor application within the treatment of high-strength textile effluent
A pilot-scale dual-stage membrane bioreactor (dsMBR) incorporating two ultra-filtration (UF) side-stream membrane modules was designed, constructed, operated and evaluated on-site for treating high-strength textile effluent. The effluent stream was characterised by a COD range of between 45 to 2,820 mg/L and an average BOD of 192.5 mg/L. The dsMBR achieved an average COD reduction of 75% with a ...
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