Sampling and Analysis
Analyses undertaken in triplicates. The pH measured by pH meter (Cyberscan 20), while oil and grease
measured according standard method 1164, EPA. Suspended solid, color and COD measured by DR 5000 HACH
spectrophotometer that is adapted from Standard Method for Water and wastewater. All water color measures
described in this work report as true color values using the platinum-cobalt (Pt-Co) method, the unit of color being
that produced by 1 mg platinum/L in the form of the chloroplatinate ion (APHA, AWWA & WEF, 2012). The
samples were filtered using 0.45μm filter paper before colors were measured.