Daw Khin Aye Myint Executive Engineer Engineering Department (Water & Sanitation) Yangon City Development Committee

Transcription

1 Daw Khin Aye Myint Executive Engineer Engineering Department (Water & Sanitation) Yangon City Development Committee

2 Organizational Set-up Sanitation Division Sanitation Branch (1) Sanitation Branch (2) Air Compressor Station Wastewater Treatment Plant

3 Disposal of sewerage into the river without treatment before establishment of Sewage Treatment Plant 3

4 Sewerage System Estimated population with sewer(conventional sewer system) is 300,000 people. Main content of system are 1) Air Compressor Station(2) Pneumatic Ejectors(3) Air Pipeline 4) Gravity sewer pipeline(5) Wastewater Treatment Plant Wastewater treatment plant Air compressor station Total length of sewer pipe line Sewage ejectors Manholes - (10.75) km(12"ci to 36"CI Pipe) - (35) Nos Nos

5 Y.C.D.C Manhole in B.D.S Area

6 History Of Yangon City Sewerage System Establish (22 sewage ejector) Service -for serve 40,000 people Extension -1929(40 sewage ejector) Service - for serve 240,000 people Cover Area -9 sq km(3.5 sq miles) in Central Business District (CBD) Company - HUGES & LANCASTER (ENGLAND) - Shone Hydro Pneumatic Ejector

7 Main Air Compressor in Botadaung Township, Sewage are driven by air compressing to Treatment Plant Year of Establishment year (6) Steam Turbine Engines Change of year to electrical driven -( ) (2) Electrical Air Compressors of 200 Horse power were reinstalled (2) Electrical Air Compressors of 120 Horse power were reinstalled Total land areas acres

8 Air Compressor Station constructed in th Street Air Compressor in Lanmadaw Township, Sewage are driven by air compressing to Treatment Plant Year of Establishment -( ) year (2) Electrical Air Compressors of 200 Horse power have been installed Total land areas acres

9 Existing Sewerage System Sanitation and sewerage for the Yangon City area is main responsibility of Engineering Department ( Water and Sanitation) under Yangon City Development Committee. Existing system, conventional sewerage, consists of :- Gravity sewers 39 pneumatic ejector stations Air distribution main Two sewage force mains and outlet 9

10 Yangon City Development Committee started to construct wastewater treatment in June 2003 by own human resources with the guidance of State Government to protect the environment. Location of Sewage Treatment Plant 5/28/

11 Year of Establishment - 12 th April 2003 Year of Completion - 17 th January 2005 Year of Opening ceremony - 22 nd December 2006 Volume of Daily Treatable sewage MGD Developer - Myanmar Engineers of Yangon City Development Committee Cost of Project - US$ 0.96 Millions (Myanmar Kyat Millions) Areas of Plant 5.56 Acres

12 Layout plan of Treatment plant Establishment of Sewage Treatment Plant Chlorination Tank Final Effluent Primary Sedimentation Tank Aeriation Tank Secondary Sedimntation Tank Sand Dried Tank Manhole 4' 4' 4' Sludge Digester Sludge Thickener Sludge Beltpress Collecting Tank Programme for Sewage Treatment Project q Detail Design q Implementation q Installation q Commissioning q Installation q Training Design Criteria: Area of Plant acres Design population - 300,000 Daily wastewater discharge m3/day BOD influent - 600mg / l BOD effluent - 20 mg / l Suspended solid influent- 700 mg / l Suspended solid effluent- 40 mg / l 12

13 Location Plan of Sewerage System & Sewage Treatment Plants South District Operate (2006) W.W.T.P (Thanhlatsoon) Sewerage System Sewage Treatment Plant

14 Equalization Tank & Vacuum Truck

15 Equalization Tank With Pre-sedimentation & Aeration

16 Raw Wastewater

17 Auto Bar Screen

18 Grit Separator

19 Primary Sedimentation Tank 19

20 Aeration tank Wastewater treatment plant was operated in January Waste are treated by activated sludge process with the aid of surface aerators. 20

21 Secondary Sedimentation Tank Aerated waste are stored for a while to settle and supernatant effluent is discharged to the Yangon River. 21

22 Chlorination Tank

23 Effluent Waste Water Effluent quality of treatment plant is BOD <20 mg/l and Suspended solid <40 mg/l. After operation of wastewater treatment plant, waste water from City Business Area treated before discharge to the Yangon river. 23

24 Sundried Tank

25 Sludge Collecting Tank

26 Waste Water Treatment Laboratory

27 Guideline for Waste Water Laboratory

28 Measuring Parameter in the Waste Water Treatment Laboratory No Parameter Units 1 BOD (Biochemical Oxygen Demand ) mg/l 2 COD (Chemical Oxygen Demand mg/l 3 TSS (Total Suspended Solid ) mg/l 4 SVI (Sludge Volume Index ) mg/l 5 DSVI (Dilute Sludge Volume Index ) mg/l 6 ph ( Potential of Hydrogen Ion ) - 7 DO ( Dissolved Oxygen ) mg/l 8 TDS ( Total Dissolved Solid) mg/l 9 Turbidity NTU 10 MLSS ( Mixed Liquor Suspended Solids) ml

29 Biochemical Oxygen Demand Measurement

30 Chemical Oxygen Demand (COD) Measurement

31 Total Suspended Solid(TSS) Measurement

32 Potential Concentration Of Hydrogen Ion(pH) Measurement

33 Turbidity Measurement

34 Total Dissolved Solid Measurement

35 Dissolved Oxygen Measurement

36 SEWERAGE ZONES AREA Zone C1 W1 C2+E1 W2 E3 N1 E4 E2 N2 N3 S1 W3 W4 Township Botahtaung,Puzundaung,Kyauktada,Pebedam, Lanmadaw,Latha,Alone,a part of Kyeemyintdaing,Dagon,a part of Bahan,a part of Kamaryut,Sanchaung a part of Bahan,Mingalartaungnyunt,Yankin,Thingangyun,Tamwe, S-Okkalapa,a part of Mayangone,N-Okkalapa,N-Dagon a part of Kamaryut,Hlaing,a part of Mayangone Taketa,Dawbon,S-Dagon Insein Dagon Seikkan East Dagon Mingalardon Shwepyithar Dala a part of Kyeemyintdaing,Seikgyi khanaungto,seikkan Hlaing Tharyar

37 THANK YOU