Alexander Szabo and Oscar Engle - Svenskt Vatten

Table 8.2: Influent (weighted COD average against the influent water flow, see chapter 10.2) and
effluent COD values.
Date Influent COD (mg/l) Effluent COD (mg/l) Reduction
5-6 Nov, 2009 122 64 48%
9-10 Jan, 2010 113 58 49%
Table 8.3: Influent (weighted TSS average, see chapter 10.2) and Effluent TSS values.
Date Influent TSS (mg/l) Effluent TSS (mg/l) Reduction
5-6 Nov, 2009 63 37 41%
9-10 Jan, 2010 47 22 53%
Survey of waste water producers at UTM campus
Construction drawings over the area were used to identify the sewage pipes connected to the
WSP. The chief engineer at UTM helped to identify the outer borders of the catchment. The
amounts of students and staff living and studying/working within the catchment were identified
by consulting housing and university offices. Some assumptions have been made where no
information could be found about the number of people living and working in buildings
connected to the treatment pond (for more information of the estimation of P.E., see Appendix
B).
The number of students and staff working within the faculties at UTM were given a P.E. of 0.2
instead of 1 (Sewerage Services Department, 1998) as they do not consume as much water at the
faculties as they would have done at home, thus lowering the P.E. value.
Outside UTM campus there are private family houses where the sewerpipes are connected to the
studied treatment pond. The number of people living in each household is not exactly known so it
was estimated that each household consists of 5 family members.
Other buildings connected to the treatment pond where no information of the number of residents
could be given were the UTM Main Office and the Mosque. The number of staff in the UTM
Main Office was assumed to be 500 and the number of people visiting the Mosque could be up to
3000 people. The P.E. for the people working and visiting the buildings was set to 0.2 in both
cases (Sewerage Services Department, 1998).
The water consumption for UTM’s students is based on a value collected from a report by
Katimon and Demun (2004). The report concludes that the average water consumption for UTM
is 260 litres/(person*day). This value is higher than the average value of 208 liter/(person*day)
for the rest of Malaysia (Ithnin, 2007).
The reason for the higher consumption according to our proposition could be:
1. Students and staff at UTM have a more water consuming behavior, such as more showering
and more use of laundry facilities.
2. Leakage of fresh water from delivery pipes.
A third proposition by Katimon and Demun (2004) for the higher water consumption at UTM is:
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