Determination of Some Physicochemical and Microbiological Characteristics of Sewage Samples from Domestic, House-boat and Off-shore Facilities Discharge Point.

Abstract

Test was conducted to determine some physico-chemical and microbiological parameters from samples of sewage effluent collected from domestic, houseboat , and offshore facilities respectively at the discharge point to the recipient environment. Among the parameters determined included: Total chlorine, Biological Oxygen demand (BOD), Total Suspended Solids (TSS), Dissolved Oxygen (DO) and faecal coliform. Test results indicated that the total chlorine had values which ranged from (<0.01-0.10)mg/l for the domestic facilities, the houseboat facilities values ranged from (0.01-0.12)mg/l. The values for the offshore facilities ranged from (<0.01-4.0mg/l). The BOD 5 values for the domestic facilities ranged from (<0.01-240) mg/l, the houseboat facilities ranged from (45.60-80.00)mg/l. The value of the offshore facilities was 20mg/l for all the three points tested. The result of the TSS indicated that for the domestic facilities, the values ranged from (75.0-115) mg/l, the houseboat facilities values ranged from (66-182) mg/l. and for the offshore facilities, results ranged from (60-265) mg/l. The DO results from the domestic facilities indicated a range of (0.18-5.92) mg/l. The result from the houseboats ranged from (2.0-2.90) mg/l, the offshore facilities results ranged from (3.21-5.32)mg/l. The faecal coliform for the domestic facilities had a value which ranged from (14-1600) cfu/100ml. the houseboat facilities values ranged from (180-290) cfu/100ml. The offshore facilities had values which ranged from (14-1600) cfu/100ml. Most of these results were higher than limits specified by the regulatory level (DPR) and an indication that the recipient environment was polluted and poses a great concern.