Research
Characterisation of Textile Wastewater Discharges in Nigeria and its Pollution Implications
Wastewater discharges from two textile industries in Lagos (Nigeria) were analysed for their pollution characteristics such as temperature, pH suspended solids (SS), total solids (TS), permanganate value (PV), biochemical oxygen demand (BOD) and chemical oxygen demand (COD). For the first textile industry the range of values for the above named characteristics were: 29.10 - 33.500C, 9.25 - 11.18, 506.50 - 663.20mg/l, 5157.50 - 6930.30mg/l, 528.70 – 728.60mg/l, 646.10 – 880.00mg/l, and 2190.00 – 2984.00mg/l. Also the second industry had values ranging from 31.40 – 41.800C, 9.22 - 11.60, 455.60 – 684.90mg/l,5099.20 – 7624.10mg/l, 469.60 – 746.40mg/l, 584.30 – 885.00mg/l and 2012.13 – 2960.00mg/l. The study revealed that the textile wastewaters were untreated and contained high amounts of pollutants. These pollutants are discharged daily into nearby receiving surface waters. There is need to prioritize action to minimize rapid depletion of dissolved oxygen in the receiving water so as to prevent “oxygen sag†in the water there also need to protect the quality and portability of the receiving surface water so as to reduce its adverse health implications on consumers in the surrounding environment.
Correlation of Suspended Solids (Ss) and Permanganate Value (Pv) Of Domestic Sewage From An Estate In Warri, Nigeria
Samples of domestic sewage obtained from a sewage treatment plant located in Warri, Nigeria were analysed for two pollution characteristics such as suspended solids (SS) and permanganate value (PV). Values obtained from the analysis were used to assess the possible relationship between the two pollution characteristics using correlation and regression analysis. Mean values of the suspended solids (SS) ranged between 200.0mg/l and 380.0mg/l while mean values of the permanganate values ranged between 162.2mg/l and 286.0mg/l. The correlation coefficient, r was 0.9577. The analysis indicates that real, strong and significant linear relationship exists between suspended solids and permanganate value in the domestic sewage
