I Remove glass stopper of the BOD bottle and place DO probe into the sample. 42 BOD measurements The following procedure applies to both total BOD 5and soluble BOD 5determinations.
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From the observations the BOD for all samples became decreased as the dilution of the samples increased.
. A higher BOD indicates more oxygen is required signifying lower water quality. The sample should be neutralized in the following manner. BOD and COD Lab Report.
2 Purpose The purpose of thisexperimentisto performa Biochemical OxygenDemandtestonprimaryclarifier effluentfromawastewatertreatmentplanttodetermine aBODversustime curve. Extensive observation of the COD and BOD levels on the same wastewater has shown that the COD to BOD ratio of a particular wastewater will remain constant over time. Select a sample volume and sodium thiosulfate titration cartridge for the digital titrator corresponding to the expected dissolved oxygen concentration according to Table 54.
A major disadvantage of the BOD test is that results are not available for 5 days. Manual calculator and lab note book. The BOD determination has been standardised and measures the amount of oxygen utilised by micro-organisms in the stabilisation of wastewater during 5 days at 20C.
The lab report will be submitted in laboratory itself. The change in DO over the five-day incubation period should be. A typical carbonaceous- demand curve showing the oxidation of organic matter and B typical carbonaceous- plus nitrogeneous-demand curve showing the oxidation of ammonia and nitrite.
Based on the experiment result obtained. Carefully fill a BOD bottle with sample water without making air bubbles. All reports should strictly follow this outline NameEntry noGroup no.
Up to 24 cash back BOD Lab Report IV. Page Maker 70 Notes. 1 points Cover page.
The experiment is conducted by first placing a. Since cold water retains oxygen better than warmer water DO is usually lower in summer months. Titrating a DO sample using a buret.
Lovac1 2020 Calorimetry techniques for abs dosimetry of laser driven ion beams. A higher BOD indicates a high content of easily degradable organic material in the sample. To stop these things from negatively affected these ecosystems we must first find what.
The BOD of wastewater must be measured throughout the treatment process to ensure that the water body it is being discharged into will maintain acceptable DO levels and the ecosystem can survive. 1 determine the BOD of a standard glucose glutamic acid sample and 2 determine the BOD of a domestic greywater sample. We collected extremely contaminated water and turn out results unreadable.
Add 2 mL of alkali-iodide-azide reagent in the same manner. The accuracy of BOD test totally depends upon the proper bacterial growth present in the water sample. So that you can avoid the formation of air bubbles.
PH of the diluted sample should be adjusted 700 02 before the incubationfor five days for proper results. Add 2ml of manganese sulfate to the BOD bottle carefully by inserting the pipette just below the surface of water. After realising our mistake we redo the experiment yet YaChie accidentally washed away other groups.
1 Laboratory Report Experiment 6 Biochemical Oxygen Demand Group 1 Jonathan Damora Tuesday March 11 2014. Ratio of BOD to COD greater than or equal to 08 indicates that wastewater highly polluted and amenable to the biological treatment. The lower the BOD value the polluted the sample.
Low BOD means less oxygen is being removed from the water so the water is usually more pure. It is important to verify that the dilution water added to each sample bottle does not receive an unknown microbial population. Title experiment date group member names and entry no.
Reported BOD5 value is the final effluent for each location as the water will be discharged to the nearest water Downloaded by nurulsyuhada Thani email protected. Up to 24 cash back The ratio of BOD to COD is useful to assess the amenability of waste for biological treatment. Typical BOD 5 values are 110-400 mgL for raw wastewater 5-15 mgL for effluent and 0 for an unpolluted river.
The results are reported as carbonaceous BOD CBOD or as CBOD 5when a nitrification inhibitor is used. It is useful to assess strength of wastes which contain toxins and biologically resistant organic substances. Biochemical oxygen demand curves.
The aim of this lab is to provide you with an opportunity to experience the measurement of a common water pollution test the Biochemical Oxygen Demand BOD test. The objectives of this lab are to. All lab data will be entered on a sheet of a paper and checked with a Teaching Assistant before attaching it with the lab report.
The highest BOD5 value in this experiment is from the seed sample of raw sewage with the value of 276 mgL and it is the reported BOD5 value in this experiment. In most cases you will use the 02 N cartridge and the 100-mL sample volume. Collect the water sample from a pond.
Temperature of water DVTime of oxygen depletion By oxygen Indicator. Dont play with dirty water. 11 Take 50 ml of sample in a 100 ml beaker.
First the dilution water is checked. Here we are again in this laboratory as we failed that experiment during our first attempt. Controls are set with each day the BOD test is performed.
While a low BOD indicates a low volume of organic materials substances which are difficult to break down. For example food processing wastewater will generally have a CODBOD ratio of 21 while textile wastewater that can contain dyes will often have a much higher CODBOD ratio of 51. Aquatic life requires dissolved oxygen in the water therefore eutrophication and ocean acidification are becoming huge problems in todays ecosystem.
In a simple test DO is determined at time zero DO0. Another sample of the same wastewater is placed in a sealed dark bottle and incubated at 20C for five days. Iii Read the DO value in mgL when the meter reading has stabilized.
Ii Switch on the stirrer of the DO probe. This is also referred to as the negative control. - BOD Lab Report.
Aeration Basin With Do 3 2 Water Treatment Wastewater Wastewater Treatment
