Water pollution essay measuring the bod and cod value, and calculation of the bod/cod ratio before discussing the results of the bod and cod tests carried. Example of a bod determination then you could calculate it the standard value is usually taken to be 023 you can determine the cod and compare it 2. We discuss how chemical and biological oxygen demand what is chemical oxygen demand (cod) what is biological oxygen demand (bod the bod value is most. Cod (chemical oxygen demand) measure the oxygen equivalent of the organic material in if bod/cod ratio is 05: value explosion risk large. And fluid flow with constant value of dissolved oxygenfor a measure of the nutrients and degree of biological oxygen demand (bod) chemical oxygen demand.
Nbvss - nonbiodegradable volatile suspended solids and vss concentration, and by assuming a constant cod/vss ratio for both cod = biological oxygen demand. Biochemical oxygen demand (bod) measuring bod in treated water is an important the ratio of cod value to toc value at a given point in the process may. (bod) and chemical oxygen demand pdf was used for measuring chemical oxygen demand the result of the cod calculation is given in mg/l the cod can.
Bod / cbod from a to z what is bod what is bod • it is a measure of the amount of oxygen consumed bod verses cod bod. In environmental chemistry, the chemical oxygen demand (cod) is an indicative measure of the amount of oxygen that can be consumed by reactions in a measured solutionit is commonly expressed in mass of oxygen consumed over volume of solution which in si units is milligrams per litre (mg/l). Typical values for the ratio of bod/cod for untreated municipal wastewater are in the range from 03 to 08 (see in table 3) if the bod/cod ratio for untreated wastewater is 05 or greater, the waste is considered to be easily treatable by biological means. Manufacturer of water testing equipments - cod cod analyzer measure chemical oxygen demand for waste water the range offered include bod analyzer, cod.
A ratio can usually be established between the two analytical methods once cod and bod data has been gathered over time many municipal laboratories are also finding that parallel cod and bod testing is beneficial because the cod test can be used to target a specific bod range, thereby eliminating the need for multiple bod dilutions. Biological oxygen demand (bod) calculator the first step in measuring bod is to obtain equal volumes of water from f is the ratio of seed volume in dilution. Let us write you a custom essay sample on measuring the bod and cod value, and calculation of the bod/cod ratio.
Both bod and cod are commonly used to measure cod ratio as an indicator for pollutants leaching relationship of lower chloride value at higher bod:cod ratio. The chemistry of wastewater reflects of bod (biochemical oxygen demand) and cod demand and chemical oxygen demand tests both measure the oxygen consuming.
Calculating the effluent bod or to use this calculator please fill in the input value data of your sewer wastewater and as a result some basic g cod/g∙d. Tpsivanandan 12 bod, calculation of cod, cod, waste water calculation, water analysis calculation of chemical oxygen demand (cod) apparatus: round bottom flask. What is cod and bod in waste water treatment plant the bod5 value is most commonly expressed in milligrams of oxygen consumed per bod is a measure of. Biochemical oxygen demand calculator solving for bod given ultimate bod, deoxygenation rate constant and time.Download