Green River Filtration Facility Plant Overview

Transcription

1 Green River Filtration Facility Plant Overview PNWS-AWWA Conference Bellevue, WA Gary Fox & Hilary Lorenz April 29, 2015

2 2 IN THE BEGINNING

3 3 PILOT PLANT OWNED AND OPERATED BY TACOMA WATER STAFF

4 ALL THAT HARD WORK PAID OFF 10 gpm/sf high rate filtration approved by Washington State DOH April Donating the trailer to education Green River CC 4

5 GREEN RIVER FILTRATION FACILITY 5

6 OVERVIEW OF THE GRFF The Big Chunks: Sources - Green River and North Fork Well field Capacity - 90 MGD Conventional / 150 MGD Direct Chemicals Coagulant, coagulant aid, polymers Filter Media Dual media: Sand and anthracite Solids Process flow, Basins, Screw Press, and Haul 6

7 GRFF SITE PLAN WEST VS. SOUTH LAYOUT FILTERED WATER SOLIDS 7

8 PROCESS FLOW DIAGRAMS 8

9 MAY 15, MONTHS 9

10 DECEMBER 21, MONTHS 10

11 MAY 15, MONTHS 11

12 DECEMBER 19, MONTHS Upwards of 190 workers per day. Pumping ~ 10 MGD Ground Water 12

13 JUNE 17, MONTHS ~30,000 Cu/Yds of concrete poured site-wide 4464 Settling plates (304 SS material), pre-assembled in frames -per basin 13

14 DECEMBER 2, MONTHS Substantial Completion December 16! Declare filtration

15 APRIL 5,

16 MAIN WATER PROCESS FLOW 16

17 INTAKE STRUCTURE IMPROVEMENTS 17

18 GREEN RIVER INTAKE PROJECT

19 GUIDE VANE ARRAY 19

20 BRUSH SCREEN CLEANER 20

21 BEHIND SCREEN-EDUCTOR BASIN 21

22 THE GREEN RIVER SUPPLY CONDUITS PROJECT AREA 4: 506 TWIN 5 Diam. Coal Tar lined Steel (1930 & 1960) PROJECT AREA 3: Diam. Coal Tar lined Steel (1979) PROJECT AREA 2: 1180 concrete lined tunnel (1912, lined 1966) PROJECT AREA 1: Diam. Polyurethane lined Steel (2003) 22

23 AREA 2- CONCRETE FINAL TUNNEL Tunnel Before Repair Work Tunnel After Repair Work 23

24 AREA 4: 1930 S 60 PIPELINE 1930 s Pipe Before Repair Work 1930 s Pipe Pitting Before Repair Work 24 24

25 AREA 4: 1930 S 60 PIPELINE 1930 s Pipe During Repair Work (prior to polyurea lining) 1930 s Pipe After Repair Work 25 25

26 AREA 4: 1960 S 60 PIPELINE 1960 s Pipe Before Repair Work 1960 s Pipe After Repair Work 26 26

27 NORTH FORK SUPPLY 27

28 NORTH FORK SUPPLY Natural river bank filtration Remote sites 7 miles upstream of GRFF 28

29 NORTH FORK TANK = 3MG BACKWASH SUPPLY TANK = 10 MG Blending Valves Existing 10 MG Tank (BW Supply) NFW Tank 29 29

30 TANK PIPING Ozone Injector Pump Station 2-way Isolation Vault BF-14-RW-103 BF-14-RW-102 Existing 10 MG Tank BF-14-RW-101 NFW Tank 3-way Isolation Vault 30 From NFW

31 NEW NFW TANK VS. EXISTING 10 MG TANK From North Fork Wellfield NFW Tank 10 MG Tank To Filter Backwash Overflow To Blending Facility 31

32 INSIDE THE 10MG TANK 32

33 33 OZONE SYSTEM

34 OZONE GENERATION AND SIDE-STREAM INJECTION 34 34

35 PRE-TREATMENT AND FLASH MIX 35

36 RAW WATER METERING STRUCTURE 36

37 FLASH MIX INJECTION AT THE DECK 37

38 CHEMICAL INJECTION GRID 38

39 FLASH MIX ACROSS A CHANNEL 16 39

40 CHEMICAL BUILDING AND COMPONENTS 40

41 NUMBER OF NEW TANKS: 20 INCLUDING NEW HYPO TANKS

42 COMPLEX CHEMICAL PIPING - REDUNDANCY 42

43 POINT A TO POINT Z FLEXIBILITY MANIFOLD ASSEMBLY COMMISSIONING AND STARTUP 43

44 PUMPS AND ACCESSORIES 44

45 EMULSIFIED POLYMER ACTIVATION Polymer Blending Units 45

46 CHEMICALS - FROM POINT A TO POINT B RED = Acidic PURPLE = Basic CPB 1 CPB 2 CPB 8 CPB 5 CPB 3 CPB 4 CPB 6 CPB 7 CPB 9 CPB 10 CPB 11 CPB 12 CPB 13 CPB 14 CPB 15 46

47 LABELS, LABELS, LABELS- LEFT OR RIGHT?

48 FLOCCULATION / SEDIMENTATION 48

49 FLOCCULATION AND SEDIMENTATION 4 flocculation trains 32 flocculators 44 x88 floc trains 20 minutes detention 42 MGD 2 sedimentation basins with 90 MGD capacity winter 168 MGD summer (algae) 89 x89 sed basins Hybrid filtration plant 49 49

50 FLOW THROUGH FLOCCULATION AND SEDIMENTATION BASIN 50

51 PLATE SETTLERS 51

52 SLUDGE SCRAPERS 52

53 SOLIDS BUILDUP 53

54 CONSIDER THE MATTER SETTLED 54

55 55 FILTERS

56 FILTER SPECS: NUMBERS FOR THE NUMBERS PEOPLE Plant Capacity: 150 mgd Initial 168 mgd Ultimate Filter Type : Constant Level & Rate Number of Filters: 8 Cell Dimensions: 42 ft x 20 ft Cells per Filter: 2 Filter Area (each): 1,680 sf Filter Area (total): 13,440 sf Filtration Rate (Nominal not including recycle): -All 8 Filters 7.7 gpm/sf (150 mgd) 8.7 gpm/sf (168 mgd) 56 -One Off-Line 8.9 gpm/sf (150 mgd) 9.9 gpm/sf (168 mgd)

57 FILTER MEDIA SPECS: Criterion Value 57 Anthracite Media -Depth 50 in -Effective Size 1.32 ± Uniformity Coefficient <1.4 -Specific Gravity 1.65 Number of super sacks (2500 lbs) 1360 Sand Media -Depth 20 in -Effective Size 0.66 ± Uniformity Coefficient <1.4 -Specific Gravity 2.63 Number of super sacks (4000 lbs) 688

58 STAINLESS STEEL UNDERDRAINS Low Rate Backwash with Air Scour Filtration 58

59 LOADING FILTER MEDIA 59

60 FILTERING SOLIDS BACKWASH WATER OUT OF FILTERS SETTLED WATER INTO FILTERS 60

61 FILTER PIPE GALLERY 61

62 FINISHED WATER PUMP STATION 62

63 5 PUMPS 200 HP EACH 73 MGD CAPACITY 63

64 64

65 FILTER OUTLET WEIR STRUCTURE Filtered unchlorinated SHC, CS, F- added 65

66 108 BUTTERFLY VALVE 66

67 67 CLEARWELLS

68 CLEARWELLS 6.6 MG Capacity 285 D x 15 H 1.3 MG Capacity 80 D x 35 H 68

69 SHC NaOH HFA SHC NaOH HFA SHC NaOH BACKGROUND WHAT IS CLEARWELL USED FOR? Clearwells provide operational storage to accommodate short-term variations between plant production and plant outflow, to allow for a controlled shutdown and to maintain hydraulic grade lines in P1 and P5 pipelines. CT is achieved in P1 and P5 pipelines, not in the clearwells. Total Volume Operational Volume Max. Design Flow of Served Pipeline Emergency Supply Duration at Peak Flow P1 Clearwell 1.3 MG 0.45 MG 73 MGD 25 min (3 hour with 10 MG tank supply) P5 Clearwell 6.6 MG 6.2 MG 95 MGD 1.6 hour Max WSE Min Service EL MG Tank SHC Max WSE 905 Min Service EL 893 P1 Clearwell SA20 M M M M P1 PEG SA18 Existing Sample Station #5 Backwash Pump Station Max WSE 876 SA21 From Filter Effluent Filter Outlet Weir Structure SA19 Finished Water Pump Station Min Service EL 860 Stormwater Wetpond P5 Clearwell Energy Dissipation structure M M P5 69

70 P1 CLEARWELL & STAND PIPE N BF-07-FW-103 BF-07-FW-101 BF-07-FW

71 P1 CLEARWELL 10 STAND PIPE 71

72 SCHEMATIC OF BACKWASH SUPPLY FIGURE

73 P5 CLEARWELL EL

74 INSIDE P5 CLEARWELL 74

75 SOLIDS PRODUCTION FACILITY 75

76 SOLIDS HANDLING MAIN PROCESS FLOW 76

77 PEG PEG Overflow PEG PEG SHC SOLIDS PROCESS FLOW DAIGRAM FWW From Filters Washwater Equalization Basins Washwater Equalization Basins Pump Station Sludge From Flocculation/ Sedimentatio n Basins Thickener Decant M Pressate Thickener Sludge Blending Tank Overflow Washwater Clarifiers Sludge M Solids Metering Vault M Decant Floc/Sed Drain and Sludge Bypass Geobags From FTW Return Equalizatio n Basin Screw Press No. 1 Hauled Offsite Decant Structure Sludge Storage Basin Pump Station Sludge Storage Basin Screw Press No. 2 Return Water To Ozone Reactors Thickened Sludge Pump Station Pressate Hauled Offsite Hauled Offsite Return Water To Rapid Mix Channel 77

78 EAST PLANT SOLIDS PRODUCTION 78

79 RETURN WATER PS 79

80 THICKENER 80

81 WASHWATER CLARIFIERS 2 BASINS (20 X42 EACH) SIDE WATER DEPTH = 15 FEET DESIGN FLOW: o o 3,200 gpm (Normal) 6,400 gpm (Max) SURFACE LOADING RATE = 3.8 GPM/SF EFFECTIVE PLATE LOADING RATE = 0.35 GPM/SF Inflow pipes from Washwater EQ Basins Pump Station 81

82 INCLINED PLATE SETTLERS DESIGN CRITERIA: DESIGN CAPACITY: 6,400 GPM (9.22 MGD); 3,200 GPM / BASIN DESIGN EFFECTIVE LOADING RATE: 0.35 GPM/SF HYDRAULIC CAPACITY: 6,400 GPM / BASIN 0.7 GPM/SF 82

83 SLUDGE BLENDING 3-5% SOLIDS 83

84 THICKENED SLUDGE PUMP STATION PROGRESSIVE CAVITY PUMPS 84

85 MECHANICAL DEWATERING 85

86 SCREW PRESS CROSS SECTION STEAM INLET 86

87 SCREW PRESSES - 24 DRY TONS / DAY

88 SCREW PRESS FLOCCULATION TANK -SNF Polydyne Chemical A-6320 (Anionic polymer) -Dosing 7 lbs active polymer per dry ton of solids 88

89 PRESSATE 89

90 CAKE- 25% SOLIDS 90

91 CONTAINER BAYS 91

92 AWAY THEY GO 92