Posts tagged 'COD'

Real-time Analysis for Biogas production
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Real-time Analysis for Biogas production - BMP and FOS/TAC

Anaerobic Digestion (AD) is the process of microbial breakdown of biomass to produce a viable source of methane-rich biogas. The resulting methane gas can then be used as fuel in transport, heating, or the generation of electricity. The biomass source commonly used in the UK  is wastewater sludge, due to its high availability. In this industry, regulations and ongoing monitoring play an import...
High Temperature Thermostat HT200S
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Which methods can be accelerated by using the HT200S?

With high speed digestion technology (HSD), the HT200S is a great solution for the busy lab, speeding up digestion times for a range of tests, saving time and money. It can produce COD results in just 35 mins, which is a massive time saving of around 2 hours and it can heat from 20°C to 148°C in just 8 minutes (20% faster than the LT200).  Cooling of the vials occurs in 13 minutes or under by m...

PhotoLab 7600 spec by WTW
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Where can the WTW reagent free COD method be used? How does reagent free COD compare to standard methods?

WTW has developed an innovative reagent free system to measure COD, Nitrate and Nitrite without the need for vials. The OptRF system is built in to some of their spectrophotometers, and provides calculation of the results based only on absorbances in the UV wavelength range. However, this system is only applicable to some samples and should be evaluated before changing from traditional CO...
How much water do I need to add to my COD vials?
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How much water do I need to add to my COD vials?

A chemical oxygen demand (COD) test is used to measure the amount of organic compounds in a water sample. It measures the capacity of water to consume oxygen during the decomposition of organic matter and the oxidation of inorganic chemicals such as Ammonia and nitrate. You can see a video on the common method of testing COD with vials in our video here. The start of the COD testing meth...

LCK1414
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LCK414 has been replaced with LCK1414

Hach have replaced LCK414 with LCK1414. The LCK414 cuvette test for measuring the chemical oxygen demand between 5.0 -60 mg/L O2 using the dichromate method has recently changed reference number to LCK1414. This new part number contains 25 vials per box (the LCK414 had 24) and does not need a zero-solution, saving working steps and times. If you would like more information about the LCK1...

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What tests can I run on the Hach HT200s High temperature thermostat

The Hach Ht200s High temperature thermostat can be used for a range of Hach Lange LCK cuvette tests to increase the speed of the digestion.  The Ht200s can be used for COD - chemical oxygen demand and a range of nutrient tests listed below: OVERVIEW OF THE TESTS...

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How can I measure Chemical Oxygen Demand (COD)?

A chemical oxygen demand (COD) test is used to measure the amount of organic compounds in a water sample. It measures the capacity of water to consume oxygen during the decomposition of organic matter and the oxidation of inorganic chemicals such as Ammonia and nitrate. The most common method uses COD vials with overall results being achieved in approx 2-3 hours. Before you start, make sure ...

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How should we dispose of our COD vials?

A Chemical Oxygen Demand (COD) test is used to measure the amount of organic compounds in a water sample. It measures the capacity of water to consume oxygen during the decomposition of organic matter and the oxidation of inorganic chemicals such as Ammonia and nitrate. The most common method of COD testing is where a water sample is pipetted into a COD vial that contains pre-measured re...

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What is the difference between standard and Mercury Free COD vials? Can I switch to Mercury Free vials?

COD tests are vital in many industries for the monitoring of effluent and discharge consent. The most common test method involves using COD vials - sample is pipetted into the vial where it mixes with the reagents already present in the vial. This is then reacted at high temperatures, producing a colour change. This colour change is analysed in a colorimeter, which reads out the result of CO...

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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. T...
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What happened at WWEM?

WWEM 2014 in Telford is the leading event in water and wastewater in the UK with specialist conference sessions on the current MCerts  situation, innovation in water and wastewater and the UK water companies funding cycles Camlab's stand  at the Water, Wastewater and Environmental Monitoring Exhibition and Conference (WWEM) has been praised for being one of the best stands at this years show. ...
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New Hach Dr1900 Portable Spectrophotometer

Hach Lange has developed a new generation device for portable water analysis – the Hach DR 1900 Spectrophotometer. [caption id="" align="aligncenter" width="600"] Hach DR 1900 portable spectrophotometer[/caption] The robust and waterproof entry level spectrophotometer model can utilise the tried and tested cuvette test system from HACH LANGE, this delivers officially recognised results fo...
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