Analysis of waste water discharged from selected fuel stations.

Abstract

In a study carried out in which different filling stations in Nakawa division participated,some of the defined findings were lack of a clear used oil department section or disposalplan by some filling stations. This presents a great probability that most of it ends up in wastewater and therefore it has drawn attention to the analysis of wastewater discharged from selected fuel stations to determine its quality. The study was conducted among three different filling stations and values (77mg/l of COD and 58mg/l of BOD) of station A are within the acceptable range because all regulatory standards are readily complied with COD and BOD. Station B values were 169mg/l for COD and 115mg/l for BOD. These values of station B were beyond the maximum permissible range which could be attributed to poor maintenance of the separators and lack of separation containment. Filling station C indicate significant non-compliance to regulatory standards, the COD values exceed the requirement with an outstanding 345mg/l and 285mg/l of BOD in the effluent. As expected, Oil and Grease value for station A(8.6mg/l) was within the acceptable range while that of station B(28.2mg/l) was the maximum value, which was a result of poor maintenance of the water oil interceptor. The oil and Grease value for station A turns out to be surprisingly compared to that of station C(13.0mg/l) which happens to be a result of the absence of a service station, hence service stations make significant oil and grease contributions. The test sample B and C failed to meet the minimum standards for BOD, oil and grease and COD. It means that the wastewater is not suitable for discharge into the environment, and further treatment is required before discharging it.