Procedure Bod

8/17/2019 Procedure Bod

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FACULTY OF ENGINEERING TECHNOLOGY

DEPARTMENT OF CIVIL ENGINEERING TECHNOLOGY

INTRODUCTION TO ENVIRONMENTAL ENGINEERING

TECHNOLOGY LABORATORY

LABORATORY INSTRUCTION SHEETS

COURSE CODE

BNP 21403

EXPERIMENT CODE


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EXPERIMENT 4

EXPERIMENT TITLE

BIOCHEMICAL OXYGEN DEMAND (BOD)

DATE

24 MARCH 2016

GROUP NO.

1

LECTURER/ INSTRUCTOR/

DR NOR HASLINA


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TUTOR

CIK AMNANI

DATE OF REPORT

31 MARCH 2016

SUBMISSION

ATTENDANCE/PARTICIPATION/DISPLINE

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INTRODUCTION:

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PROCEDURE:

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RESULTS & CALCULATIONS

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ANALYSIS

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DISTRIBUTION OF MARKS

DISCUSSIONS:

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FOR LABORATORY REPORT:


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ADDITIONAL QUESTIONS:

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CONCLUSION:

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SUGGESTION & RECOMENDATIONS

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REFERENCES:

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TOTAL:

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EXAMINER COMMENTS:

RECEIVED DATE AND STAMP:


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STUDENT CODE OF ETHICS

DEPARTMENT OF CIVIL ENGINEERING TECHNOLOGY

FACULTY OF ENGINEERING TECHNOLOGY

I hereby declare that I have prepared this report with my own efforts. I also admit to

not accept or provide any assistance in preparing this report and anything that is in it

is true.

1)

Group Leader

_________________________________________(Signature)

Name


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:

TSAI KAI LEN

Matrix No.

:

AN 1400

2)

Group Member 1

__________________________________________(Signature)

Name

:

AMIR LUQMAN BIN ATAN

Matrix No

:

AN 140186

3)

Group Member 2

__________________________________________(Signature)

Name

:

SITI NUR FATEHA BINTI MOHD PAIZ

Matrix No.

:

AN 140185


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2


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FACULTY : ENGINEERING

EDITION:

TECHNOLOGY

LABORATORY: CIVIL

REVISION NO:

2

ENGINEERING TECHNOLOGY

EXPERIMENT: BIOCHEMICAL

EFFECTIVE DATE:

FEB. 2016


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OXYGEN DEMAND (BOD)

AMENDMENT DATE:

OBJECTIVES

To understand the concept of biochemical oxygen demand in a given

water/wastewater sample.

To determine the biochemical oxygen demand in water/wastewater sample.

2.0 LEARNING OUTCOMES

At the end of this course students are able to:

Describe the importance of BOD in the environmental studies.

Evaluate the water parameter quality in domestic wastewater sample and water

supply.

Identify problems and use their generic skill to solve problems.

Develop their ability to work in group.


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INTRODUCTION

Biochemical Oxygen Demand (BOD) test measures the ability of naturally occurring

microorganism to digest organic matter, usually in a 5 days

incubation at 20oC by analysing the depletion of oxygen. BOD is the most commonly

used parameter for determining the oxygen demand on the

receiving water of a municipal or industrial discharge. BOD can also be used to

evaluate the efficiency of treatment processes and is an indirect measure of

biodegradable organic compounds in water.

The BOD test is normally required by a regulatory program. For this experiment two

analytical methods for testing and reporting BOD5 will be examined; dilution method

(EPA method 405.1 and Standard method 5210 B) and respirometric method (using

BODTrak apparatus by Hachcompany).

1


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EDITION:

TECHNOLOGY

LABORATORY: CIVIL

REVISION NO:

2



EFFECTIVE DATE:

FEB. 2016

OXYGEN DEMAND (BOD)


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AMENDMENT DATE:

INSTRUMENTS /APPARATUS / CHEMICAL / REAGENTS

Chemicals / Reagents

pH calibration buffers: pH 4.00, pH 7.00 and pH 10.00

Nutrient salt solutions (prepared by technician);

Phosphate buffer solution: 8.5 g potassium dihydrogen phosphate (KH2PO4) are

dissolved in approximately 500 mL distilled water and 21.75 g Di potassium hydrogen

phosphate (K2HPO4) are added, followed by 33.4 g di sodium hydrogen phosphate

(Na2HPO4. 7H2O) and 1.7 g ammonium chloride (NH4Cl). The solution is made up to 1 L

and the pH of this buffer should be 7.2.

Magnesium sulphate solution: 22.5 g magnesium sulphate (MgSO4. 7H2O) is

dissolved in distilled water and the solution made up to 1 L.

Calcium chloride solution: 27.5 g of anhydrous calcium chloride (CaCl2) are

dissolved in distilled water and the solution made up to 1 L.

Ferric chloride solution: 0.25 g FeCl3.6H2O is dissolved in distilled water and the

solution made up to 1 L.

Dilution water: 1 mL of each of the nutrient salt solutions is added to 1 L deionised

water and aeration carried out for several days (at least 12 hours) in the dark. Mix

thoroughly and bring temperature to 20 +

3oC.

Note: Prepare dilution water 3 to 5 days before initiating BOD test to ensure that the

BOD of the dilution water is less than 0.2 mg/L.


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1 N of sulfuric acid, H2SO4 or 1 N sodium hydroxide, NaOH

FACULTY : ENGINEERINGEDITION:

TECHNOLOGYLABORATORY: CIVIL

REVISION NO:2

ENGINEERING TECHNOLOGYEXPERIMENT: BIOCHEMICALEFFECTIVE DATE:

FEB. 2016OXYGEN DEMAND (BOD)

AMENDMENT DATE:

Apparatus /Instruments

300 mL glass stoppers BOD bottles


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Incubator regulated at 20+ 1oC

pH meter

FACULTY : ENGINEERINGEDITION:

TECHNOLOGYLABORATORY: CIVIL

REVISION NO:2


EXPERIMENT: BIOCHEMICALEFFECTIVE DATE:

FEB. 2016OXYGEN DEMAND (BOD)

AMENDMENT DATE:

Dissolved oxygen meter


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Air pump

500 mL Measuring cylinder

Beaker

Volumetric flask, 1000 mL


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2


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EDITION:

TECHNOLOGY

LABORATORY: CIVIL

REVISION NO:

2



EFFECTIVE DATE:

FEB. 2016


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OXYGEN DEMAND (BOD)

AMENDMENT DATE:

PROCEDURE

Determination of sample size

Use formulas inCalculation section to calculate the minimum and maximum

estimated of sample size.

Pre-treatment of samples (Neutralizing samples)

Caustic alkalinity or acidity can prevent bacteria from growing during the course of

the BOD test. To prevent this, samples which have pH values higher than pH 8.0 or

lower than pH 6.0 must be neutralized to pH 7.0 before the test is performed.

50 mL of sample was poured into a 100 mL beaker.


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The pH of the sample was measured using a pH meter. The pH 6.5 – 7.5 were

neutralised.

The pH value was recorded.


EDITION:

TECHNOLOGY


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LABORATORY: CIVIL

REVISION NO:

2



EFFECTIVE DATE:

FEB. 2016

OXYGEN DEMAND (BOD)


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AMENDMENT DATE:

BOD 5 measurement

The sample of estimated BOD5 (400 mg/L for influent and 60 mg/L for effluent) was

prepared.

4 unit of 300 mL BOD bottle was labelled separately for each influent and effluent.

One bottle was for blank solution and another three bottle for sample.

Each bottle was partially filled with dilution water and the volume of sample size was

added differently based on calculation. For influent, the 2nd bottle ( labelled as 1 ) was

added with 2.7 ml of sample, 3rd bottle ( labelled as 2 ) was added with 3.9 ml of

sample and the 4th bottle ( labelled as 3 ) was added with 5.0 ml of sample. The 1st

bottle ( labelled as blank ) was filled with distilled water only. For effluent, the 2nd

bottle ( labelled as 1 ) was added with 16.75 ml of sample, 3rd bottle ( labelled as 2 )

was added with 23.5 ml of sample and the 4th bottle ( labelled as 3 ) was added with


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30.25 ml of sample. The 1st bottle ( labelled as blank ) was filled with distilled water

only.


EDITION:

TECHNOLOGY

LABORATORY: CIVIL

REVISION NO:

2




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EFFECTIVE DATE:

FEB. 2016

OXYGEN DEMAND (BOD)

AMENDMENT DATE:

The initial DO for each bottle was determined and data was recorded on Results

section.

The bottle stoppers was inserted and the top of each bottle each was filled around the

bottle stopper with dilution water.


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The remaining bottles was placed in the incubator at 20°C and incubated for five days.

At the end of exactly three days (+3 hours), the final DO content of the incubated bottles was determined. The result was recorded on data sheet.


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Procedure Bod

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