Physico-chemical Investigation On Dumpsite Leachate
[A CASE STUDY OF ILORIN METROPOLIS]

PROCEDURE :
1.    Sample dilution water was prepared  using a BOD nutrient buffer pillow
2.    The range of sample volumes required was determined.
3.    With a serological pipette, portions of well-mixed sample was measured and transferred to separate 300ml glass-stoppered BOD bottles. The sample was stirred with pipette before pipetting each portion.
4.    Two shots of Nitrification inhibitor was added (approx. 0.16g) to each bottle.
5.    Each bottle was filled just below the lip with seeded or unseeded dilution water. When adding the water, it was allowed to flow slowly down the sides of the bottle to prevent formation of bubbles.
6.    The stopper on the bottle was pressed several times for it to mix.
7.    Enough dilution water was added to the lip of the BOD bottle to make a water seal.
8.    Plastic over cap was placed over the lip of each bottle and the bottles were placed in an incubator at 200C.  It was incubated in the dark for five days.
3.4.3 Determination of pH
PROCEDURE:
1.    The power key was pressed to display light
2.    After that the pH key was pressed
3.    The AUTO/MANUAL key was pressed so as for AUTO indicator to bring light. The S1 and pH indicators will flash. Zeros will appear in the display.
4.    The electrode was placed into a pH 4.01 buffer solution and the dispenser button was pressed. For best accuracy, it was allowed for 30seconds to elapse before performing step 5.
5.    The standard key was pressed and waited until the pH indicator stops flashing. The S2 indicator begins flashing. The actual pH value was displayed.
6.    The electrode was rinsed with deionized water and blot dry with a paper towel. Place the electrode into a pH 7.00 buffer solution and press for best accuracy, wait 30 seconds before performing step 7.
7.    The STANDARD key was pressed to allow S2 to stop flashing. Also waited until the pH indicator stops flashing. The actual pH value was displayed.
8.    The pH key was pressed. The electrode was rinsed with deionized water and the samples were measured and blot dry with a paper wipe. The electrode Placed into the sample and the dispenser button was pressed. The meter now measures pH.