Bacteriological and Physicochemical Analysis of Selected Domestic Drain Water in the University of Ibadan, Nigeria

Abstract

Bacteriological and physicochemical analysis were carried out on selected  domestic waste water from a drainage system in the University of Ibadan. Twenty-four  water samples were collected from the three locations at the ratio of eight samples per drainage A, B and C sources. Physicochemical parameters were determined using standard methods, there are variations  in the alkalinity and acidity  of the water sampled which ranged from 6 – 7,  slight turbidity  and suspended dissolved particles that could be responsible for different colorations of the samples were also noticed.  The Biochemical Oxygen Demand(a measure of biological degradable organic matter) of the samples varies from 7.0mg/L  to 7.4mg/L  which has  exceeded the standardized  breakpoint of 4mg/L index of clean water. The total bacteria count was determined  by pour plate technique and four genera of bacteria namely; Staphylococcus aureus, Klebsiella sp.,Micrococcus sp and Proteus sp were isolated from water samples. The total viable bacteria  count of 2.4x10⁷cfu/ml,  1.0x10⁵cfu/ml and C 1.1x10⁶cfu/ml were recorded for the sample A, B and  C respectively. Results of the biochemical and microbial analysis  obtained from this study  serves an indication of bacterio-physicochemical  pollution of these domestic drain which could serves as a potential source of infection transmission when not regularly treated.

Key words: Domestic drains water, Bacteria, B.O.D., University of Ibadan.