chemical oxygen demand lab report

There are 4 common tests to determine organic pollution in wastewater. Determine the sample size s.

Biochemical Oxygen Demand Bod And Cbod

COD is widely used as a measure of the susceptibility to oxidation of the organic and inorganic materials present in water bodies and in the municipal and industrial.

. Always bring lab manual calculator and lab note book. For domestic and some industrial wastewater COD is about 25 times BOD. Up to 24 cash back Chemical oxygen demand does not differentiate between biologically available and inert organic matter and it is a measure of the total quantity of oxygen required to oxidize all organic material into carbon dioxide and water.

The presence of minute traces of organic matter on the equipment will cause large errors in the test results. The chemical oxygen demand method is one of the most common and effective way of determining the presence and level of toxicity in water. Biochemical oxygen demand BOD Bacteria placed in contact with organic material will utilize it as a food source.

COD is used to gauge the short-term impact wastewater effluents will have on the oxygen levels of receiving waters. - COD lab reportdocx. COD values are always greater than BOD values.

A measure of organic materials concentration in the wastewater that can be oxidized by the bacteria and normally determined on the 5th day at 20C through the amount of oxygen consumed. Like Biochemical Oxygen Demand and Carbonaceous Biochemical Oxygen Demand Chemical Oxygen Demand COD is a test used to determine the oxygen-depleting capacity of water polluted with organic compoundsWhen ambient microbes break down the organic. 5 Dissolved Oxygen and Biochemical Oxygen Demand 6 Chemical Oxygen Demand 7 MPN 8 Air Quality Monitoring.

A Memoir by the Creator of Nike. So clean all equipment thoroughly before using. Sample trial 1 Sample trial 2 Mean reading of sample.

Additionally other chemicals and inorganic substances in the water can be oxidized by dichromate. Chemical Oxygen Demand COD is an important water quality parameter that is used in a variety of applications including confriming that wastewater discharge and waste treatment procedures meet regulatory criteria quantyfying the biodegradable fraction of wastewater effluent the ratio of BOD to COD measurements are also used to determine the. The appropriate amount of sample was introduced into commercially available.

Since the COD test can be performed rapidly it is often used as a rough approximation of the waters BOD even though the COD test measures some. Each group will submit only one lab report. Chemical Oxygen Demand Equipment.

2600 Dudley Rd Kilgore TX 75662. Similarly Chemical Oxygen Demand COD is the demand of oxygen required to reduce dichromate Cr 2 O 72 - Cr in 6 oxidation state to Cr 3. The COD was determined by the dichromate reflux method.

It is for this reason why the method was used in our experiment. Why is it important to conduct the COD test for a water and wastewater sample. All lab data will be entered on a sheet of a paper and checked with a Teaching Assistant.

Exp 1 Chemical Oxygen Demand. The COD test is more robust than BOD because not all organic matter is readily oxidized by bacteria. 1343 Chemical Oxygen Demand COD COD is a measure of the oxygen equivalent of the organic matter in a water sample that is susceptible to oxidation by a strong chemical oxidant.

BOD COD TOC and Oil Grease. 8 Indian Institute of Technology Delhi India. In this utilization the organic material will eventually be oxidized to stable end products such as CO2 and water.

Chemical oxygen demand COD. What is Chemical Oxygen Demand COD. Most samples of wastewater will require more oxygen during the incubation period than is found in the BOD bottle so the samples must be diluted.

This test is used to quantify the amount. The test for biochemical oxygen demand BOD is a bioassay procedure that measures the oxygen consumed by bacteria. 3306 State Hwy 135 N Kilgore TX 75662.

Home About Services Contact Careers. However our findings showed that the toxicity level in the test water was low since the reduction. The Chemical Oxygen Demand or COD is a measurement of the amount of material that can be oxidized combined with oxygen in the presence of a strong chemical oxidizing agent.

Oxygen demand is a measure of the amount of oxidizable substances in a water sample that can lower DO concentrations Nemerow 1974. The amount of oxygen used in this process is called biochemical. Chemical oxygen demand COD is the amount of dissolved oxygen that must be present in water to oxidize chemical organic materials like petroleum.

In this study the procedure referred is APHA-5210 B. Chemical oxygen demand COD is the amount of dissolved oxygen that must be present in water to oxidize chemical organic materials like petroleum. The method is also fast thus saving on time.

CONCLUSION This experiment is to determine the chemical oxygen demand COD in river water sample and the COD is found to be reliable and useful indicator to relate organic matter content in the river water. 25 or 50 mL burette graduated in 01 mL. Chemical Oxygen Demand is an important water quality parameter.

H2SO4 to pH. COD value mgL 0 Under range Under range -. Biochemical Oxygen Demand BOD 441.

SM 5220 D Sample Requirements Bottle. At the proper dilution the residual DO after five days will be at least 1. Biochemical oxygen demand BOD5.

Tchobanoglous and Schroeder 1985. What is Chemical Oxygen Demand COD. To determine chemical oxygen demand COD in waste water sample.

Chemical Oxygen Demand COD is a measure of the capacity of water to consume oxygen during the chemical decomposition of the organic matter and oxidation of inorganic chemicals such as ammonia and nitrite. COD is used to gauge the short-term impact wastewater effluents will have on the oxygen levels of receiving waters. Measured as biochemical or chemical oxygen demand.

Biochemical Oxygen Demand Bod In Wastewater I Real Tech