The Effect of Detergent Effluent on the Physico-Chemical Characteristics and Plankton Diversity of Osere Stream, Ilorin, Kwara State, Nigeria

The physico-chemical properties and plankton diversity were studied in Osere stream, Ilorin, Kwara State, Nigeria from November 2009 to April 2010. Surface water and plankton samples were collected from three sampling stations. High value of Biochemical Oxygen Demand of 8.68mg/L and low value of Dissolved Oxygen of 1.23mg/L at the point of entry than at the upper flow of the stream indicate pollution stress. Also the presence of high abundance of Anabaena and Oscillatoria sp. which are pollution indicator species shows the negative effect the effluent from the detergent factory has on the stream, thus posing a potential threat to the people who live around and depend on the stream for daily use, hence the need for proper management of the stream. © JASE

The impacts of auto-mechanic workshops on soil and groundwater in Ibadan metropolis

The extents of groundwater and soil pollution arising from auto-mechanic activities from auto-mechanic workshops at Ibadan metropolis were examined. Groundwater and top soil samples from auto-mechanic villages and control site were collected fortnightly over a period of two months and analysed for both physicochemical parameters and some heavy metals. Results of physicochemical parameters of groundwater ranged from 23 to 29°C for temperature, 0.25 to 8.64 mg/L for DO, 0 to 52.19 mg/L for BOD, 14.7 to 205.86 mg/L for COD, 5.63 to 7.33 for pH, 18 to 133 mg/L for total alkalinity, 23 to 287 mg/L for total hardness, 2 to 32.75 F.T.U for turbidity, 187 to 268 μs/cm for conductivity, 0.7 to 44.6 mg/L for TSS, 135 to 248 mg/L for TDS, 136.3 to 292.6 mg/L for TS, 0.03 to 62.1 mg/L for nitrate, 2.37 to 12.02 mg/L for phosphate, and 0 to 55.6 mg/L for oil and grease. Results of heavy metals analysis for groundwater ranged from 0 to 1.132 mg/L for Cd, 0 to 24.46 mg/L for Pb and 0 to 24.6 mg/L for Fe. Statistical analysis, using Pearson’s correlation coefficient indicated correlations of some parameters at P≤0.01 and 0.05. The mean and standard deviations of the parameters were also calculated. The daily activities of automechanic workshops have negative impacts on both soil and water.Key words: Ibadan Metropolis, mechanic workshop, pollutants, soil, groundwater

Comparative Microbial Analysis of Earthworm Casts Collected From Ikenne, Ogun State, Nigeria

A comparative assessment of the physicochemical parameters and microbial profile of three types of earthworm casts (Pellet, Mass and Turret) were determined. The total viable count (TVC), coliform counts, yeast and mould counts were determined using standard procedures. The pH ranged from 7.8 for Mass cast to 8.6 for Pellet cast. Moisture content of the casts ranged from 29.43% for pellet casts to 47.10% for turret casts. Organic matter was 1.05%, 0.72% and 0.63% for pellet, turret and mass casts respectively. TVC was 4.8 x 107cfu/g, 6.1 x 107cfu/g and 1.2 x 108cfu/g for Mass, Turret and Pellet casts respectively. Pellet cast recorded the highest coliform count (1.5 x 107) while Turret cast the least (7.3 x 106 cfu/g). Mould counts was 8.3 x 106 cfu/g for turret cast and 1.2 x 107cfu/g for pellet and mass casts. The lowest yeasts count was 1.2 x 107cfu/g in mass cast while the highest was 3.8 x 107cfu/g for pellet cast. Microbial distribution in the three casts types showed that Staphylococcus aureus is common to all Cast-types. Citrobacter spp, Pseudomonas fluorescens, Penicillium chrysogenum and S. rosei were isolated from Pellet cast only. Aspergillus fumigatus, Fusarium oxisporum, Pseudomonas aeruginosa and Penicillium oxalicum were isolated from only Turret Cast while Aspergillus terreus, Fusarium compacticum, Klebsiella aerogenes and Streptococcus feacalis were isolated from Mass Cast only. The presence of Bacillus licheniformis in Pellet Cast is an advantage plus for Pellet cast usage since this bacteria contributes to nutrient cycling and displays antifungal activities.Keywords: Pellet cast, Turret cast, Mass cast, Microbial Count

The Effect of Detergent Effluent on the Physico-Chemical Characteristics and Plankton Diversity of Osere Stream, Ilorin, Kwara State, Nigeria

The physico-chemical properties and plankton diversity were studied in Osere stream, Ilorin, Kwara State, Nigeria from November 2009 to April 2010. Surface water and plankton samples were collected from three sampling stations. High value of Biochemical Oxygen Demand of 8.68mg/L and low value of Dissolved Oxygen of 1.23mg/L at the point of entry than at the upper flow of the stream indicate pollution stress. Also the presence of high abundance of Anabaena and Oscillatoria sp. which are pollution indicator species shows the negative effect the effluent from the detergent factory has on the stream, thus posing a potential threat to the people who live around and depend on the stream for daily use, hence the need for proper management of the stream