COD sample Articles
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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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Pulp and Paper Article: Improving Wastewater Treatment Processing with Online Monitoring
Wastewater treatment professionals in the Pulp and Paper industry face difficult challenges. Many of the manufacturing processes are heavily reliant on water, resulting in large volumes of wastewater that can contain complex mixtures of organic pollutants, solids, and other chemicals. Wastewater treatment is often necessary to meet environmental effluent discharge permit limits or comply with ...
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Biodegradable organic matter in domestic wastewaters: comparison of selected fractionation techniques
The first objective of this work was to evaluate the ability of the long-term BOD tests to provide the total biodegradable COD (BCOD) for domestic wastewaters. Results show that the method is repeatable (using two different volume samples, 97 and 164 mL) and that the fractions of BCOD determined were not statistically different from the one obtained by respirometry (at low S/X ratio). ...
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Study of physico-chemical quality of the industrial waste water effluent from Gove industrial area of Bhiwandi City of Maharashtra, India
This paper advocates water pollution study of Gove industrial area of Maharashtra, India with special reference to the physico-chemical characteristics of common industrial waste water effluent. The physico-chemical parameters like temperature, pH, solid content, total hardness, chloride content, dissolved oxygen (DO), biological oxygen demand (BOD) and chemical oxygen demand (COD) were studied ...
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Online effluent monitoring helps automotive plant stay in compliance - Case Study
Problem An automotive plant in Ohio needed to treat wastewater for COD removal. Under new regulations, the sequential batch reactor system needed real-time performance data to comply with a new COD discharge limit. Solution AppliTek proposed an AppliCOD online monitor, using a titrimetric method for COD measurement. Three months of side-by-side comparison of data from the lab and AppliCOD ...
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Toxicity Studies of Treated Residual Wastes in Austria using Different Types of Conventional Assays and Cost-Effective Microbiotests
Abstract : The toxicity and chemical quality of 12 mechanically-biologically treated residual wastes were studied during different treatment periods. Acute and chronic bioassays were carried out with a battery of test organisms. The acute toxicity was assessed using Daphnia magna (crustacea) and Vibrio fischeri (luminescent bacteria). The chronic toxicity was tested with Selenastrum capricornutum ...
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Efficient Waste Water Treatment
Clean drinking water is an essential need of mankind. Often surface water like rivers or lakes is used as drinking water source. To prevent these resources from pollution the effective treatment of waste water is a must. For example in China 75% of discharged waste water is coming from pulp and paper, textile and dyeing industries. To run a waste water treatment plant in the most efficient way ...
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