Global Leaders in Biological Wastewater Treatment

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1 Global Leaders in Biological Wastewater Treatment

2 OVERVIEW OF ANOXKALDNES

3 AnoxKaldnes is a global provider of leading-edge biological processes for wastewater treatment. The head-office is in Sweden. There are technical centers in Norway, USA, Australia and Spain. AnoxKaldnes approach to wastewater treatment is always based on a deep knowledge in microbiology and process technology. There is a very active R&D within AnoxKaldnes with the intention to stay in the very frontline of developing new more efficient and cost effective biological processes. The knowledge and experience within the group is used to find the best solution for the customers together with the customer in each individual case.

4 The most difficult task with wastewater treatment systems is not solving the problem but defining it Technical Centers: Sweden, Norway, USA, Spain, Australia, China 80+ Employees: (8 PhD, 20 Master of Science, 7 Process Engineers) Research & Development: Internal & External Institutions Focused on fixed film biological treatment systems

5 History 1985 Prof. Ødegaard started research on Kaldnes Moving Bed (TM) Process 1989 First MBBR was sold in Norway still operating with same media 1996 First MBBR was sold in United States paper mill in Ohio 1996 Research begins on IFAS concept using plastic media 2002 Kaldnes wins Stockholm Industry Water Award Continued Research into MBBR, BAS & IFAS biological processes and new media types Greater then 500 industrial / municipal system in operation with multiple plants under design using AnoxKaldnes MBBR, BAS & IFAS concepts

6 INTRODUCTION TO MOVING BED BIOFILM REACTOR (MBBR) PROCESS

7 Moving Bed Biofilm Technology (MBBR ) The process is based on the biofilm principle. The core of the process is the biofilm carrier elements made from polyethylene with a density close to that of water. The reactors are filled with carrier elements up to maximum 67% of the reactor volume. The biofilm carrier elements are being kept suspended and in continuous movement in the water by aeration. The carriers are designed to provide a large protected surface for the micro-organisms and a good mass transfer.

8 DEFINATIONS MBBR vs. BAS vs. IFAS MBBR Process BAS TM Process IFAS Process (HYBAS TM )

9 Operation of the MBBR & HYBAS Process 1) Aeration for oxygen & mixing in BOD & nitrification 2) Slow speed mixers for mixing in post-denitrification applications Aerobic reactor 3) Screens used to retain media in each reactor 4) Multiple reactors used to specialize bacteria for each application Anoxic reactor

10 Components to the Aerobic HYBAS TM Treatment System MAJOR COMPONENTS A. Media B. Stainless Steel Aeration System C. Stainless Steel Sieve Assemblies D. Tank E. Blowers F. Instrumentation & Controls

11 Biofilm Carrier Elements K1 500 m²/m³ in bulk (152.4 ft 2 /ft 3 ) 10 mm (>3/8 ) diam 7 mm (>1/4 ) length K3 TM 500 m²/m³ in bulk (152.4 ft 2 /ft 3 ) 25 mm (~1 ) diam 10 mm (>0.33 ) length BIOFILM CHIP TM - P 900 m²/m³ in bulk (274 ft 2 /ft 3 ) 45 mm diameter x 3 mm thick

12 AnoxKaldnes Aeration Grid Layout Optimized for media applications - Strength when draining basin - Mixing of media at 67% fill (max conditions) - In-Field Oxygen transfer comparable to fine bubble aeration - Stainless steel for durability - Zero maintenance

13 Sieve Assembly Aeration Reactor Fixed-in place stainless steel sieve assemblies. Designed for 2 inch s head loss per reactor at peak hydraulic flows.

14 Operation of MBBR & HYBAS TM System Flexibility in Design Add Future Capacity without Adding New Tankage & Postpone Investment until later Current Load 39,000 kg/d 40% Increase Filling degree by adding more biomedia Future Load 45,000 kg/d 67% Maximum Fill of K1 / K3 Biomedia

15 Operation of MBBR/HYBAS TM System Complete Mixed Reactor/ NO backwash required

16 World Wide Installations Municipal Wastewater (192 plants) Food Processing Industry (110 plants) Pulp & Paper Industry (70 plants) Pharmaceutical Industry (9 plants) Petroleum / Chemical Industry (24 plants) Electronics (6 plants) Fish Farming (45 plants) Other Industry (51 plants)

17 Municipal Installations Type: 114 Plants for BOD Removal 24 Plants for BOD Removal & Nitrification 9 Plants for Post-Denitrification 28 Plants for Total Nitrogen Removal 17 Plant for Nitrification (HYBAS TM ) Size: 15 Plants MGD (75,700 m 3 /d - 280,000 m 3 /d) 28 Plants MGD (15,140 m 3 /d - 37,850 m 3 /d) 48 Plants MGD (3,785 m 3 /d - 15,140 m 3 /d) 101 Plants - < 1 MGD (< 3,785 m 3 /d)

18 Application Areas Organic Removal BOD/COD Removal Roughing applications remove 50-80% of BOD prior to AS. Moa Point WWTP New Zealand Design Flow 20 MGD / 68 MGD (76 MLD / 258 MLD) 3 process trains MBBR 3 x 32,485 ft3 (3 x 920 m3) BOD < 20 mg/l TSS < 30 mg/l

19 Application Areas Organic Removal BOD/COD Removal Green fields projects, requiring complete treatment, where space limitations are a factor. Poipu WWTP Design Flow - 1 MGD (3.7 MLD) 2 Reactors 29 ft dia x 10 ft SWD (13,200 ft3 ; 374 m3) BOD < 10 mg/l Complete Treatment

20 Application Areas Nitrification (NH 3 -N >>> NO 3 -N & NO 2 -N) Greenfield or cold temperature applications where nitrification is needed and space is a factor. After a lagoon which performs BOD removal and limits upgrade. Cheyenne Crow Creek Design Temp 9C BOD, Nitrification to <2 mg/l Lagoon Treatment System Johnstown, CO Design Temp 5C Nitrification to <2.2 mg/l

21 Application Areas Nitrogen Removal Nitrogen Removal Upgrading of existing systems where space limitations are a factor. Fields Point WWTP Design Flow - 77 MGD (300 MLD) BOD < 10 mg/l Total Nitrogen < 5 mg/l COD

22 INTRODUCTION TO BIOFILM + ACTIVATED SLUDGE (BAS) PROCESS

23 Biofilm - Activated Sludge treatment (BAS) Biofilm Activated sludge

24 Operation of the BAS TM Process 1) Aeration for oxygen & mixing in MBBR Pre-Treatment Reactor 2) MBBR operated as Flow-Through Process (No RAS) 3) Activated Sludge system operated with Reactor + Clarifier 4) Overall combination of two processes produces less sludge then either one by themselves.

25 Example of improving sludge quality through upgrade with MBBR pretreatment Upgrade of existing activated sludge plants Biofilm pretreatment installed Conventional System, SVI 200 ml/g Upgraded System, SVI 40 ml/g

26 INTRODUCTION TO IFAS

27 IFAS upgrade for N removal Principle: BOD-removal and denitrification takes place in suspended phase (MLSS) Nitrification performed by nitrifying bacteria attached to a carrier media. Two microbial systems in the same process. No or little need for additional tankage Dramatically decreased risk of filamentous problems, better sludge Clarification hydraulic limited Nitrification remains in case of activated sludge wash-out Nitrifiers protected from incoming toxic spills Lower temperature dependence

28 MBBR-IFAS upgrade for N removal (HYBAS) Nitrifiers in biofilm Much larger biofilm surface area exposed to wastewater after biofilm established With the right type of media - no risk of red worms

29 Clusters of nitrifiers Microanimals (ciliates and rotifers) Thin layer of heterotrophs Nitrifiers

30 IFAS Retrofit Applications Existing Plant BOD & TSS = 30 mg/l Nitrification Only Pre & Post DN & Nitrification NH3-N < 1 mg/l Pre-DN & Nitrification NH3-N < 1 mg/l & TN >8 mg/l NH3-N < 1 mg/l & TN < 8 mg/l COD

31 AnoxKaldnes HYBAS TM Case Study - Broomfield

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33 Broomfield WWTP HYBAS TM Primary Effluent Characteristics Summer Flow = 8.0 MGD (30,300 m 3 /day) Winter Flow = 6.7 MGD (25,360 m 3 /day) BOD Load = 9,725 lbs/day; 4,410 kg/day (146 mg/l) TSS Load = 6,504 lbs/day; 2,950 kg/day (98 mg/l) TKN Load = 2,724 lbs/day; 1,235 kg/day (40.8 mg/l) Temperature = 13 C 18 C

34 Broomfield WWTP HYBAS TM Flow Diagram Primary Effluent FEQ Return Flow Junction/ Splitter Box Anaerobic and Anoxic Basins (mixed liquor only) Mixed Liquor Recycle Mixed Liquor Recycle IFAS Aeration Basins (media and mixed liquor) To Secondary Clarifiers RAS from Clarifiers Process Schematic of Broomfield BNR/IFAS Facilities Pre-Anoxic 12,846 ft3 (364 m3) Anaerobic 21,313 ft3 (604 m3) Anoxic 46,590 ft3 (1,319 m3) Aerobic 160,526 ft3 (4,546 m3)

35 Broomfield WWTP 1 ST Winter Influent Ammonia Effluent Ammonia AMMONIA (mg/l) MEDIA ADDED EACH WEEK - SLOWLY INCORPORATED TO A 30% FILL 0 13-Jul Sep Oct Dec Jan Mar-03 DATE

36 Broomfield WWTP Full Scale Data Broomfield WWTP Monthly Average Influent Data Flow (MGD), NH3-N (mg/l), Temp (C) Influent Flow Influent Ammonia Wastewater Temperature Influent TSS Influent BOD BOD & TSS (mg/l) Jul-03 Sep-03 Nov-03 Jan-04 Mar-04 May-04 Jul-04 Sep-04 Nov-04 Jan-05 Mar-05 May-05 Jul-05 Sep-05 Nov-05 Jan-06 Mar-06 Date

37 Broomfield WWTP Full Scale Data Broomfield WWTP Monthly Average Effluent Data 14 TSS, BOD, NH3-N, NOx-N, TP (mg/l) Effluent TSS Effluent BOD Effluent NH3-N Effluent NOx-N Effluent Total P 0 Jul-03 Sep-03 Nov-03 Jan-04 Mar-04 May-04 Jul-04 Sep-04 Nov-04 Jan-05 Mar-05 May-05 Jul-05 Sep-05 Nov-05 Jan-06 Mar-06 Date

38 Broomfield WWTP Full Scale Data Broomfield WWTP Monthly Operational Data 8.0 Aerobic SRT 180 MLSS (g/l); Aerobic SRT (d); NH3-N (mg/l) Aerobic MLSS Effluent NH3-N SVI SVI (ml/l) Jul-03 Sep-03 Nov-03 Jan-04 Mar-04 May-04 Jul-04 Sep-04 Nov-04 Jan-05 Mar-05 May-05 Jul-05 Sep-05 Nov-05 Jan-06 Mar-06 Date

39 QUESTIONS??