Separations Overview TDRL Seminar

Transcription

1 Separations Overview TDRL Seminar Presented by: Infilco Degremont

2 North American Footprint 5 companies 471 employees ANDERSON DUNDAS, ON 60 EMPLOYEES DEGREMONT LTD MONTREAL, QC 27 EMPLOYEES WPT SALT LAKE CITY, UT 132 EMPLOYEES OZONIA NA NEW JERSEY 71 EMPLOYEES INFILCO DEGREMONT RICHMOND, VA 181 EMPLOYEES 2

3 Over 114 Years of Providing Solutions Wide Range of Treatment Solutions - Headworks - Disinfection - Biosolids - Biological - Separations - Reuse Clarification Technologies: Filtration Technologies: SuperPulsator sludge blanket DensaDeg high-rate solids contact AquaDAF dissolved air flotation Greenleaf cluster filters ABW automatic backwash

4 IDI Clarifier History Process Type Surface Loading Rate No. of Installations Year Developed Accelator Solids Contact gpm/ft 2 ~ s Pulsator Sludge Blanket gpm/ft 2 ~ PulsaPak Sludge Blanket 1.5 gpm/ft 2 ~ s SuperPulsator Sludge Blanket gpm/ft 2 ~ DensaDeg AquaDAF High-Rate Solids Contact High-Rate DAF gpm/ft 2 ~ gpm/ft

5 AquaDAF

6 AquaDAF Advantages Proven technology for 30+ years Optimization of conventional equipment to increase efficiency High rates: 30 to 40 m/h Perfect process to efficiently remove low density particles Perfect process for membrane pretreatment - NO POLYMER

7 AQUADAF APPLICATIONS Clarification (low turbidity/tss) High TOC, color waters Low density solids Algae removal Cold waters; Thermal variation Membrane filtration pretreatment Desalination pretreatment Tertiary Phosphorous Removal (w/ filters)

8 DAF Process Overview High-Rate Dissolved Air Flotation Internal System Primary Flocculation G Raw Water Inlet & Distribution - Following in-line mixing Air-Water Dispersion Zone Accumulated Sludge Layer Auto Effluent Weir Effluent Channel Flotation Zone Secondary Flocculation G

9 DAF Process Overview High-Rate Dissolved Air Flotation Operating Principles Recycle Stream: Recycle flow: 8-10% of throughput Operating Pressure: 5-6 bar Unpacked Saturator Vessel Injection: Proprietary nozzles Micro-Bubble Production: Air Blanket: Milky appearance Solids adhere to bubbles and float to surface Continuous production of air blanket

10 DAF Process Overview Sludge Removal Options Hydraulic: Flood DAF basin with automatic effluent weir Sludge wash line around periphery of DAF basin Simple, less mechanical approach Water loss: 0.75 to 1.5% Solids concentration: < 0.3 to 0.5% Mechanical Scraper: Mechanical scraper mechanism Mechanical, thickening approach Water loss: < 0.5% Solids concentration: 2-4%

11 Recent AquaDAF Successes SSJID, CA Pretreatment to membranes (6300 m3/h) Haworth, NJ Algae Removal of Lake water: (33,000 m3/h) Hudson, MA - Tertiary phosphorous removal. Less than 0.1 mg/l DAF goal

12 Haworth, NJ (32,700 m3/h)

13 DensaDeg Clarifier

14 History & Applications Product developed in the early 1980 s by Degremont ~250 installations First installation: 1984 Diversified Applications Clarification Softening Organics Removal Filter/Membrane Backwash Recovery WATER - 19% Primary Clarification Tertiary Phosphorus Removal High Rate CSO/SSO INDUSTRIAL - 46% WASTEWATER - 35% Clarification Softening/Silica Removal Metal Precipitation Fluoride Removal FGD Wastewater

15 DENSADEG ADVANTAGES Flocculation + Clarification + Thickening in one unit 2 4% Solids Production No problems with large variations in influent conditions High Rates: m/h (clarification) m/h (softening) m/h (CSO) Unit capacity: m3/h

16 Dynamic Separation & Clarification Turbine Draft Tube Rapid Mix Reactor Reactor Turbine Drive Clarifier / Thickener Launder Assembly Recirculation Cone Lifting Assembly Coagulant Settling Tube Assembly Settling Tube Support Polymer Flow Splitter Sludge Recycle Pump Sludge Recirculation Sludge Blowdown

17 Unit Design Considerations REACTOR RETENTION: ~8-10 min LOADING RATE: m/h (clarification) m/h (softening) m/h (CSO) CAPACITY per UNIT: 160 to 4000 m3/h (concrete) 25 to 4000 m3/h (steel) RAPID MIX RETENTION: 2 to 3 min (clarification) SLUDGE RECYCLE: 3% to 6% CLARIFIER RETENTION: ~ min SLUDGE BLOWDOWN: 2% to 4% (clarification) 5% to 20% (softening)

18 Densadeg Performance Toledo, OH Largest HRC for CSO (36,500 m3/h), design velocity >100 m/h Wadi Ma in, Jordan Backwash waste recovery system followed by UV, 700 m3/h

19 SuperPulsator Sludge Blanket Clarifier

20 SuperPulsator Process Sludge Blanket Clarifier Complete System Collection Channel Vent Valve Vacuum Pump Vacuum Chamber Blowdown Pipes Collection Laterals Concentrator Settling Plates Distribution Channel Distribution Laterals

21 SuperPulsator Applications Pulsed Sludge Blanket Technology Clarification only - New or Retrofit Typical Loading rates of 5-10 m/h Low to high Turbidity ( NTU) Low to very high Color ( PCU) Organic carbon removed with PAC Membrane Pretreatment w/ no polymer - low rates

22 SuperPulsator Operating Principles Pulsed Sludge Blanket Technology Pulsed flow through the basin - created by vacuum pump Constant upflow velocity over entire surface area Combined flocculation/clarification in one basin Internal sludge concentration and automatic sludge removal No submerged moving parts and corrosion resistant internals

23 SuperPulsator Process Sludge Blanket Clarifier The Pulse Vent Valve Open Vacuum Pump Vent Valve Closed Vacuum Pump Vacuum Chamber Vacuum Chamber Sludge Blanket Expansion Sludge Blanket Contraction Periodic sludge discharge 0.2 to 0.5% solids Venting: 8 to 12 seconds Pulling a Vacuum: 40 to 50 seconds

24 SuperPulsator Process Sludge Blanket 7 feet of a clarification zone 10 feet of a filtering sludge blanket

25 SuperPulsator Process Overview Myrtle Beach, SC

26 Singapore, Chestnut WTP Plant Flow: 17,000 m3/h Influent Turbidity: 5-10 NTU Effluent Turbidity < 0.7 NTU Coagulant: 30 ppm Alum Polymer: 0.4 ppm

27 Process Highlights Advantages SuperPulsator ADVANTAGES Proven Technology hundreds of operating installations No submerged moving parts Sludge Blanket = 10 of Buffering Capacity High Rate Process with Detention Time Extremely Low Energy Required Membrane pretreatment without polymer (reduced loading rates) Low capital cost - $

28 Pulsapak Package Treatment Plant

29 Pulsapak Design Considerations Clarification or Clarification & Filtration Little to no civil construction 8 Sizes between m3/h Typical Loading rates of 1.5 gpm/ft2 (3.6 m/h) Low to high Turbidity ( NTU) Low to very high Color ( PCU)

30 Pulsapak Package Treatment Plant Clarified Water Filter Inlet Washwater Outlet Trough Air Line Clarified Water Collection Laterals Vacuum Chamber Vacuum Pump Vacuum Vent Coagulated Water Inlet Settling Tubes Sludge Blanket Raw Water Inlet Waste Piping Filter-to Waste Line Backwash Line Filter Drain Stilling Plates Sludge Blowdown Distribution Laterals Sand Underdrain Effluent Header Anthracite

31 Pulsapak P-100 (160 m3/h) (Lake Murray, SC)

32 Pulsapak P-18 (50 m3/h) (Canada)

33 The ABW Filter

34 The ABW Filter An American Invention, Introduced Circa 1928, by The Hardinge Co. of York, PA Acquired and marketed by Environmental Elements Corp, of Baltimore, MD until 1987 Acquired and now marketed by Infilco Degremont, Inc. of Richmond, VA In excess of 2,000 units are currently in operation in the United States and Canada. Units are also in operation in: UK / Switzerland / Japan / Korea

35 ABW Filter Advantages Low head loss across filter 300mm No pipe gallery No need for filter redundancy No large backwash pumps No backwash tank needed Minimal energy consumption

36 Typical Applications Tertiary Treatment Reuse Potable Water Industrial Process and Waste

37 Filter Design Application Wastewater Design Rate 5 m/h nominal 10 m/h peak flow Typical Media Configuration 275mm coarse media Wastewater Reuse Potable Water 5 m/h nominal 10 m/h peak flow 6-7 m/h 275mm coarse media or 400mm dual media (if stringent guarantees are required) 275mm fine media or deeper media.

38 Typical Concrete ABW

39 Typical Package ABW

40 Typical Filter Layout Unfiltered Water Slide Gate (Optional) Influent Channel Effluent Weir Influent Channel Influent Weir Effluent Channel Effluent Channel Filtered Water

41 The ABW Filter Influent Ports Washwater Trough Influent Channel Control Panel Effluent Channel Compartmentalized Filter Bed Washwater Hood Backwash Assembly

42 Backwash Mode Backwash Direction Entrapped Solids A B C D E Backwashing Underdrain

43 ABW Filter Performance Results

44 Back River WWTP Baltimore MD Peak Flow: 80,000 m3/h

45 Greenleaf Filter Gravity Cluster Filter

46 Greenleaf Filter Overview Gravity Cluster Filter The Greenleaf Filter Control represents a unique concept for the control of multiple granular media filters. It eliminates bulky piping and valves through the ingenious application of siphons. Low Maintenance Requires Small Footprint Low Energy Requirement Common Wall Construction Excellent Filtered Effluent Simple and Effective

47 Greenleaf Filter Overview Gravity Cluster Filter Traditional filter requires significant amounts of: land, large piping and large, line sized valves. A Greenleaf type filter has a footprint that is 33% smaller than a conventional filter and gallery.

48 Greenleaf Filter Overview Gravity Cluster Filter Design Considerations Cluster-type filter 4 cells grouped around central core Customary design - Filter/backwash rate, media depth, etc. are practiced Essentially 4 conventional filters

49 Greenleaf Filter Overview Normal Filter Operation Vacuum Tank 3 - Way Valve (Actuates Inlet Siphon Valve) Pretreated Water Flume Low High Inlet Weir Chamber Inlet Siphon Valve Top of Basin Filter Cell Forebay Wash Trough Effluent Control Weir Filtered Water to Storage or Service Underdrain Drain Common Filtered Water Chamber Cell Isolation Line Filter to Waste Line Isolation Valve

50 Greenleaf Filter Overview Maximum Headloss in One Filter Cell Vacuum Tank 3 - Way Valve (Actuates Inlet Siphon Valve) Pretreated Water Flume Filter Cell Low High Inlet Weir Chamber Inlet Siphon Valve Top of Basin Backwash Siphon Forebay Wash Trough Effluent Control Weir Filtered Water to Storage or Service Underdrain Common Filtered Water Chamber Drain Cell Isolation Line Backwash Waste Section Filter to Waste Line Isolation Valve

51 Greenleaf Filter Overview Filter Cell Drain Vacuum Tank 3 - Way Valve (Actuates Inlet Siphon Valve) Pretreated Water Flume Low High Inlet Weir Chamber Inlet Siphon Valve Top of Basin Filter Cell Forebay Wash Trough Effluent Control Weir Filtered Water to Storage or Service Underdrain Drain Common Filtered Water Chamber Cell Isolation Line Filter to Waste Line Isolation Valve

52 Greenleaf Filter Overview Backwash Initiation Vacuum Tank BW Solenoid Valve (actuated) Pretreated Water Flume Low High Inlet Weir Chamber Inlet Siphon Valve Top of Basin Filter Cell Forebay Backwash Siphon Wash Trough Effluent Control Weir Filtered Water to Storage or Service Underdrain Drain Common Filtered Water Chamber Cell Isolation Line Filter to Waste Line Isolation Valve

53 Greenleaf Filter Overview Backwash Vacuum Tank BW Solenoid Valve Pretreated Water Flume Low High Inlet Weir Chamber Inlet Siphon Valve Top of Basin Filter Cell Forebay Backwash Siphon Wash Trough Effluent Control Weir Filtered Water to Storage or Service Underdrain Drain Common Filtered Water Chamber Cell Isolation Line Filter to Waste Line Isolation Valve

54 Greenleaf Filter Overview Filter-to-Waste Vacuum Tank Pretreated Water Flume Filter Cell Low High Inlet Weir Chamber Inlet Siphon - ACTUATED Top of Basin Effluent Control Weir Forebay Wash Trough Filtered Water to Storage or Service Underdrain Drain Common Filtered Water Chamber Cell Isolation Line Filter to Waste Valve OPEN Isolation Valve CLOSED

55 Greenleaf Filter Overview Return to Service Vacuum Tank Pretreated Water Flume Low High Inlet Weir Chamber Inlet Siphon Valve Top of Basin Filter Cell Forebay Wash Trough Effluent Control Weir Filtered Water to Storage or Service Underdrain Drain Common Filtered Water Chamber Cell Isolation Line Filter to Waste Line Isolation Valve

56 Greenleaf Filter Advantages Greenleaf siphons for flow split and backwash removal ELIMINATE large inlet & backwash valves (8 per filter) All siphon solenoids accessible from operating platform Small foot print due to compact arrangement - 33% less space than conventional filter - no large pipe gallery Prefabricated components => Simple Installation Impossible to shock or surge filter Small clearwell - Self Backwashing Unlimited media/underdrain configurations

57 Questions?