1. The study determined water consumption and recyclability in laboratories at Osun State University in Nigeria. Water use was estimated per tap and per laboratory practical session.
2. Four laboratories - Industrial Chemistry, Biochemistry, Medical, and Water/Environmental - were selected for detailed analysis based on their water consumption levels.
3. Influent and effluent samples from the laboratories were analyzed physically, chemically, and for toxic parameters. Results showed the Biochemistry laboratory effluent requires the most treatment to remove parameters above permissible levels.
6. 107
Figure 1: Water Consumption/Lab-Session
2.5 Materials and Experimental Protocols
The materials required to carry out the above exercise include;
Photometer Test tubes Plastic container or kegs with air tight cover
Measuring cylinder Distilled water 70% ethanol
Cotton wool pH meter Turbidity Meter
Reagents Stop watch hose
2.5.1 Sterilization of Materials
All glass wares were thoroughly washed with detergent solution, rinsed with several changes
of distilled water and subsequently allowed to drain, after which they were sterilized or disinfected
with 70% ethanol. The working bench was also swabbed with 70% alcohol to have a sterile
environment.
2.5.2 Labelling of samples
Samples collected were labelled according to the tabulated codes shown in Table 2 below to
avoid mix up of different samples.
Table 2: Labeling of Samples
LABORATORY INFLUENT LABELLING EFLUENT LABELLING
Sample 1 Sample 2 Sample 1 Sample 2
Industrial chemistry lab ICH-IS1 ICH-IS2 ICH-ES1 ICH-ES2
Bio-chemistry lab BCH-IS1 BCH- IS2 BCH-ES1 BCH-ES2
Micro-biology lab MCB-IS1 MCB-IS2 MCB-ES1 MCB-ES2
Health centre HC-IS1 HC-IS2 HC-ES1 HC-ES2
10. International Journal of Civil Engineering and Technology (IJCIET), ISSN 0976
ISSN 0976 – 6316(Online), Volume 5, Issue 9, September (2014), pp.
Table 4: Results of the Toxic
S/N
Waste Water
Recyclability
Indicator
Unit
1 Ammonia Mg/L
2 Phosphate Mg/L
3 Chromium Mg/L
4 Alluminuim Mg/L
5 Silica Mg/L
6 Sulphate Mg/L
7 Molybdate Mg/L
8 Total Bromine Mg/L
9 Hexavalent Chromium Mg/L
10 Total Copper Mg/L
11 Free Cooper Mg/L
12 Sulphide Mg/L
13 Chlorinedioxide Mg/L
and Recyclability Indicator of Laboratory Effluent
Laboratories SON
BCH ICH MED WE SON Max
Figure 3: Toxic and Recyclability Indicator of Lab Effluent