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Biochemical Oxygen Demand Test Report

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3.6.1 Biochemical oxygen demand test

(a) Collect the sample
(b) Prepare the sample size or range(depend on COD value and divide by 2, to get the Estimation BOD) and seeding range (sample did not contain a sufficient amount of microbes so seeding is necessary using 1 ml diluted leachate ) (c) Measure do for each sample by using dissolved oxygen meter
(d) Prepare 300ml dilution water as control
(e) Put all prepared samples and control in sample 300ml incubation bottle (3 bottles)
(f) Put all the bottles in BOD incubator for 5 days. Set the temperature at 20oC.
(g) Results are in unit mg/L.

1 bottle of dilution water
1 bottle seed + dilution water
1 bottle of seed+ sample + dilution water

Calculation :

Solve for seeded biochemical …show more content…

This parameter is used as an indicator of water quality . Suspended solids are considered important as a carrier of contaminants and pathogens on the surface of the particles .The smaller the particle size , the greater the amount of surface area per unit weight of each particle , the greater the burden of material to be taken . Removal of suspended solids can usually use the method of deposition and water filters . In this study, suspended solids was determined using the DR / 2010 uses two samples cell, each sample consider testing sample and control sample.

3.6.5 Nitrogen Ammonia

(a) Select the test
(b) Insert the multi-cell adapter with the 1-inch square cell holder facing the user.
(c) Prepare sample: dill a 25ml mixing graduated cylinder to the 25ml mark with sample.
(d) Blank preparation: fill a 25-ml mixing graduated cylinder to the 25-ml with deionizer water.
(e) Add three drops of mineral stabilizer to each cylinder. Stopper and invert several times to mix
(f) Add three drops of polyvinyl alcohol dispersing agent to each cylinder. Stopper and invert several times to mix.
(g) Pipette 1.0mL of Nessler Reagent into each cylinder. Stopper and invert several times to

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