Alexander Szabo and Oscar Engle - Svenskt Vatten

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Figure 6.1: Map over the UTM campus area with (1) The WSP studied in this report (2) another WSP within UTM; (3) biological-mechanical treatment plant; (Another campus area and treatment plant is located in the north-east, outside the map) (Szabo & Engle, 2010) The treatment system that this report will focus on consists of two parallel lines of facultative ponds followed by maturation ponds (Figure 6.2). The available documents do not tell for how many persons the ponds are dimensioned for, but according to the contractor for de-sludging operation, this pond system was built to serve approximately a P.E. of around 8 000. The pond system is a simple construction, where the influent waste water is divided in a chamber before it enters each treatment line through pipes located under the water surface. The ponds have no screening and objects of many different sizes have been seen floating in the pond. These objects have a tendency to clog the cannels between the ponds. Since the water level of the receiving river is higher than the effluent level, a pumping station is located between the pond and the river. The pumps are currently working discontinuously, and during the time when the pumps are not pumping, the ponds accumulate waste water beyond the designed water levels. The technical data of the pond system can be found in Appendix G. Figure 6.2: Shape of pond system with facultative ponds (1) followed by maturation ponds (2) (Szabo & Engle, 2010). 6.3 Recipient   Introduction The effluent from the WSP is released into a stream passing through the UTM area (Figure 6.3). The stream transforms into two small lakes a few hundred meters downstream, where the main entrance to UTM is located (see Figure 6.4). In these small lakes, canoeing activities take place which demands good water quality. The part of water that origin from the WSP is large compared to the upstream river water. Most of the water in the lakes is therefore considered mainly to be effluent water from the WSP.   28 
Figure 6.3: The receiving river. Upstream (left) and downstream (right) of WSP (Szabo & Engle, 2010). Sampling procedure for lake water Composite samples were collected consisting of 3 samples upstream and 3 samples downstream the WSP on the 14 th of January 2010. The samples were analyzed for COD and TSS according to the procedures described in chapter 7. The points where the three composite samples upstream and downstream were collected can be seen in 6.4.   29 
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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 and 30: value of 4:1 in length/width ratio.
Page 31: 6. Study Area   6.1 Climate Johor
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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