Alexander Szabo and Oscar Engle - Svenskt Vatten

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5.3 Previous Study on the studied treatment pond at UTM In year 1999, an under-graduate report was produced by Zahari and Zain (Faculty of Civil Engineering, UTM) analyzing the same WSP at UTM. The report is written in Malay language, and our focus has been on the waste water composition data found in this report. The measurements have been conducted without flow measurements, hence, the results only represent average values, that is the values were not weighted against the influent water flow. When the waterflow into the treatment pond is high, it is likely that more BOD, COD and TSS will end up in the pond, and this is not considered in the report. The results from Zahari and Zain can be found in appendix A.   26 
6. Study Area   6.1 Climate Johor Bahru lies in a tropical region very close to the equatorial line with temperatures ranging between 21 to 32°C all year around. The climate is humid with an average relative humidity around 90% (Richmond et al., 2007). The precipitation comes in form of short but heavy rain showers and the average rainfall in Johur Bahru is around 2400 mm each year (World Meteorological organization, n.d.). The rainiest periods are from March to May when Johor Bahru is influenced by the southwest monsoon and November to December when the northeast monsoon arrives. As Johor Bahru lies in a region with a typical tropical climate with heavy thunderstorms, the storm water is usually not connected to the waste water treatment systems. This is also the case at UTM where the storm water is led through channels and ditches directly to the local rivers. 6.2 The waste water treatment facilities at UTM Within the Universiti Teknologi Malaysia, two waste stabilization pond facilities and two mechanical-biological treatment plants are in operation. The pond system this report will focus on is located south-west of the UTM campus area (see Figure 6.1) and it is treating the waste water from the western part of the catchment area in UTM (see Appendix D). These WSP’s were built in 1985. The mechanical-biological treatment plants were built later, as the university expanded.   27 
Page 1 and 2: ___________________________________
Page 3 and 4: ___________________________________
Page 5 and 6: List of abbreviations BOD - Biochem
Page 7 and 8: Summary Malaysia is developing fast
Page 9 and 10: Acknowledgements This report is a r
Page 11 and 12: Contents  List of abbreviations..
Page 13 and 14: Waste water production in t
Page 15 and 16: XI   
Page 17 and 18: treatment facilities simple, treatm
Page 19 and 20: 1.3 Objective The objective of this
Page 21 and 22: 2.2 Pretreatment   Screening The
Page 23 and 24: the case of waste water treatment p
Page 25 and 26: 3. Pond Hydraulics 3.1 Retention ti
Page 27 and 28: 5. Previous studies on WSP systems
Page 29: value of 4:1 in length/width ratio.
Page 33 and 34: Figure 6.3: The receiving river. Up
Page 35 and 36: accuracy (the accuracy of a single
Page 37 and 38: BOD analyzes were carried out using
Page 39 and 40:   35 
Page 41 and 42: 8. Water flow and quality Sampling
Page 43 and 44: stirred up. The algae population ma
Page 45 and 46: Table 8.2: Influent (weighted COD a
Page 47 and 48: Figure 8.8: Above: The water veloci
Page 49 and 50: Figure 8.10: The water velocity in
Page 51 and 52: Method 1: Estimation of domestic wa
Page 53 and 54: atio between BOD 5 and COD for the
Page 55 and 56: Figure 8.14: Above: TSS concentrati
Page 57 and 58: Table 8.11: Measured BOD 5 on 5-6 N
Page 59 and 60:   55 
Page 61:   Screening device  The task

Alexander Szabo and Oscar Engle - Svenskt Vatten

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