OFF RIVER STORAGE (ORS) : An Alternative for Urban River Raw Water Source: Sungai Labu Water Treatment Plant Experience

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Calvin Gabriel Kennedy
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1 WATER MALAYSIA 2015 OFF RIVER STORAGE (ORS) : An Alternative for Urban River Raw Water Source: Sungai Labu Water Treatment Plant Experience Haji Abdul Karim bin Endut 23 rd April

2 Content of Presentation 1 2 Sungai Labu Water Supply Scheme 3 Raw Water Resources Off River Storage(ORS) 4 Operational Results 5 Conclusions 2

3 Raw Water Resources for Portable Water -MWIG % 1% Direct Abstraction from River 82% Storage Dam (Direct) Groundwater 3

4 Potential Interruptions of Raw Water Resources for treatment (1) Polluted Source (2) Deterioration of Quality - Oil / Diesel / Chemical - Development upstream of the intake - Industrial waste (3) Extreme Whether - Heavy rain (high turbidity) - Drought (less dilution) 4

5 5 Recent Treatment Plant Interruptions due to Raw Water Pollution

6 1 2 3 Raw Water Resources Sungai Labu Water Supply Scheme Off River Storage(ORS) 4 Operational Results 5 Conclusions 6

Sungai Labu Water Supply Scheme - General

7 Sungai Labu Water Supply Scheme - General Dedicated water treatment plant for KLIA. Treatment Plant capacity 105MLD. Construction completed in 2011 by Federal Government. Operations and Maintenance by Konsortium Air Selangor (KASB) since June 2012 under Service License. 7

8 Sungai Labu Water Supply Scheme - Location Sungai Labu WTP 8

9 Sungai LabuWater Supply Scheme Phase 3 (+5MLD) Phase 4 (+30MLD) Phase 2 (+25MLD) Phase 1 (45MLD)

10 Sungai Labu Water Supply Scheme - Overview Major Components * Raw Water Intake Intake ORS WTP * Off River Storage (ORS) MAB Reservoirs * Water Treatment Plant 10

11 Sungai Labu Raw Water Intake Intake Key Components: River Gates Intake chambers Raw Water pumps 1200 mm MS pipe to ORS Online Analysers River Gate 1200mm dia. MS Pipe 1.2km length from Intake to ORS 11

12 Sungai Labu- Off River Storage (ORS) Spillway Saddle Dam C Saddle Dam B Saddle Dam A FSL = 45mRL 9.3 MCM Active Storage Main Dam 37m high 1200mm dia. MS Pipe 1.2km length from Intake to ORS

13 Sungai Labu Water Treatment Plant ORS WTP WTP Facts Sheets: Construction completed end 2011 Plant Capacity 105 MLD Process with DAF system 13

14 1 2 3 Raw Water Resources Sungai Labu Water Supply Scheme Off River Storage(ORS) 4 Operational Results 5 Conclusions 14

15 Off River Storage (ORS) Total Storage Live Storage Lake Area Full Storage Level Minimum Operating Level No. of Saddledams 10.6 MCM 9.3 MCM 52 Ha 45m LSD 22m LSD 3 nos Commissioned September

16 ORS - Storage Capacity 105 Mld 90 Days 80 Mld 115 Days 55 Mld 170 Days

17 ORS Operating Rule Curve

18 ORS Key Performance Indicators To ensure continuous and uninterrupted supply of raw water available for treatment. To store 90 days storage of raw water for 105MLD treatment capacity. To improve raw water quality(nh3, turbidity, colour, etc.). To maintain raw water quality entering the treatment plant. 18

19 ORS Challenges: (1) Urbanization Urbanized and Industrialized areas upstream of intake 19

20 ORS Challenges (2) High Ammonia in the river 10.0 Ammonia Level at Sg. LabuRaw Water Intake Ammonia (mg/l) Ammonia Standard MOH (< 1.5 mg/l) 0.0 Raw Water Ammonia (River) Ammonia Standard MOH (>1.5 mg/l) 20

21 ORS Challenges : (3) Low Flow Periods Low water level Sand intrusions 21

22 ORS Challenges (4) High Flow Periods Sand intrusions Large debris at river gates 22

23 Raw Water Resources Sungai Labu Water Supply Scheme Off River Storage(ORS) Operational Results 5 Conclusions 23

24 Sungai LabuSanitary Survey -Map 24

25 Operational Target Highest Standards Mandatory compliance to MOH Standards. KPIs for Treated water quality beyond MOH Standards Parameters Turbidity Residual Chlorine E-Coli Residual Chlorine + E-Coli Aluminium Parameters MOH SPAN KPI Turbidity Colour ph Aluminium Ferum Mangenese Residual Chlorine MOH Standards < 5 NTU 0.2~5.0 mg/l Nil in 100 ml 1.5~2.5 mg/l and No E Coli in 100 ml < 0.2 mg/l < 5 NTU < 15 HU 6.5 ~ 9.0 < 0.2 mg/l < 0.3 mg/l < 0.1 mg/l mg/l MOH QAP (Others) 98.0 % 97.7 % 99.6 % 99.8 % 89.8 % < 0.4 NTU < 5 HU 7.0 ~ 8.5 < 0.1 mg/l < 0.1 mg/l < 0.05 mg/l mg/L SPAN Sg Labu 100 % 100 % 99.8 % 99.9 % 100% 90% 90% 90% 90% 90% 90% 98.2% 25

26 Operational Results (1) ORS Level (June 2012 March 2015) Full Supply 45m ODL ORS Level (modl ) st Jun : 38.8m 31 st Dec : 44.9m st Jan: 44.9m 31 st Dec: 43.1m st Jan: 43.2m 31 st Dec: 34.4m st Jan : 34.5m 31 st March : 39.7m Critical Level 22m ODL Jan Dec 2013 Jun Dec 2012 Jan Dec 2014 Jan Dec 2015 Critical Level Full Supply Level 26

27 Operational Results (2) Uninterrupted WTP Treated Water Production vs Raw Water Pumping Raw Water Pump Design 140 MLD Treated Water Pump Design 105 MLD Pumping Capacity (MLD) Treated Water Production Raw Water Pumping (ORSR) Raw Water Pump Design Capacity Treated Water pump Design Capacity 27

Operational Results (3) Ammonia Reduction LOCATION DATE River Intake ORS Inlet Main dam Saddle A Saddle B Saddle C Tower WTP Inlet 21 June 14 2.95 2.34 0.11 0.03 0.

28 Operational Results (3) Ammonia Reduction LOCATION DATE River Intake ORS Inlet Main dam Saddle A Saddle B Saddle C Tower WTP Inlet 21 June July Aug Sept

29 TURBIDITY (NTU) 26 June July Aug Sept Oct Nov Dec Jan Feb March April May June July Aug Sept Oct Nov Dec Jan Feb March April May June July Aug 14 4 Sept 14 1 Oct Nov Dec Jan Feb March 15 Operational Results (4) Highest Standards TREATED WATER TURBIDITY JUNE 2012 MARCH 2015 (INDEPENDENT LABORATORY DATA) SPAN KPI for Turbidity < 0.4 NTU DATE

30 Operational Results (5) Highest Standards 0.25 Aluminiumin Treated Water vs MOH Standard Aluminium Standard MOH (<0.2 mg/l) Aluminium Concentration (mg/l) Month

31 Operational Results -(6) Highest Standards Parameters Turbidity Colour ph Aluminium Ferum Mangenese Residual Chlorine Fluoride Ammonia E. Coli Residual Chlorine+ E. Coli Total Tests Quality Target < 0.4 NTU < 5 HU < 0.1 mg/l < 0.1 mg/l < 0.05 mg/l mg/l mg/l < 1.5 mg/l Nil in 100 ml 1.5~2.5 mg/l and No E Coli in 100 ml - QAP Target 90 % 90 % 90 % 90 % 90 % 90 % 98.2 % 98 % 100 % 99.8 % 99.9% (Jun Dec) % % % % % % % 17, (Jan Dec) % % % % % 30, (Jan -Dec) % 99.98% % % % 30, (Jan Mar) % % 7,470 31

32 1 2 3 Raw Water Resources Sungai Labu Water Supply Scheme Off River Storage(ORS) 4 Operational Results 5 Conclusions 32

33 Conclusions ORS has ensured uninterrupted treatment plant despite deterioration in quality and quantity of water in the river. Storage capacity of 90 days is sufficient during the low flow periods to meet the demand. Significant improvement in raw water quality during storage. Stable water quality from ORS facilitates treatment plant to produce high quality treated water. 33

34 THANK YOU 34

STREAMING CURRENT MONITOR FOR COAGULANT OPTIMIZATION IN WATER TREATMENT PLANTS - LAP EXPERIENCE

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