II.PROCEDURE AND METHOD
A. Surveying the Wastewater Plant
The general physical environment of the surrounding water
sources in Bangkokthonburi University was surveyed. It was
found that waste water resulting from activities in the
B.Collection and preparation of waste water
Water samples used in these experiments was collected
from the waste water treatment plant that was released
together from the activities of Bangkokthonburi University.
The water samples were collected in plastic and pour into a
large plastic bucket. The collected waste water was collected
in volume of 120 liters with the repository using composite
sampling type from 9:00 am to 11:00 am.