Global Leaders in Biological Wastewater

Treatment

OVERVIEW OF ANOXKALDNES

•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 intentionto 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.

“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

• 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

History

INTRODUCTION TO MOVING BED BIOFILM REACTOR (MBBR) PROCESS

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 largeprotected surface for the micro-organisms and a good mass transfer.

DEFINATIONSMBBR vs. BAS vs. IFAS

MBBR Process

IFAS Process(HYBASTM)

BASTM Process

Operation of the MBBR & HYBAS Process

Aerobic reactor

Anoxic reactor

1) Aeration for oxygen & mixing in BOD & nitrification

2) Slow speed mixers for mixing in post-denitrification applications

3) Screens used to retain media in each reactor

4) Multiple reactors used to specialize bacteria for each application

Components to the Aerobic HYBASTM

Treatment System

MAJOR COMPONENTS

A. MediaB. Stainless Steel

Aeration SystemC. Stainless Steel

Sieve AssembliesD. Tank E. BlowersF. Instrumentation &

Controls

Biofilm Carrier Elements

K1

500 m²/m³ in bulk(152.4 ft2/ft3)

10 mm (>3/8”) diam7 mm (>1/4”) length

K3TM

500 m²/m³ in bulk(152.4 ft2/ft3)

25 mm (~1”) diam10 mm (>0.33”) length

BIOFILM CHIPTM - P

900 m²/m³ in bulk(274 ft2/ft3)

45 mm diameter x 3 mm thick

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

Sieve Assembly – Aeration Reactor

Fixed-in place stainless steel sieve assemblies. Designed for 2 inch’s head loss per reactor at peak hydraulic flows.

Operation of MBBR & HYBASTM System

Flexibility in Design – Add Future Capacity without Adding New Tankage & Postpone Investment until later

Increase Filling degree by adding more biomedia

40%39,000 kg/d

Current Load

67%

45,000 kg/dFuture Load Maximum Fill of

K1 / K3 Biomedia

Operation of MBBR/HYBASTM SystemComplete Mixed Reactor/ NO backwash required

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)

Municipal Installations

Type: 114 Plants for BOD Removal24 Plants for BOD Removal & Nitrification9 Plants for Post-Denitrification28 Plants for Total Nitrogen Removal17 Plant for Nitrification (HYBASTM)

Size: 15 Plants - 20 - 80 MGD (75,700 m3/d - 280,000 m3/d)

28 Plants - 4 - 10 MGD (15,140 m3/d - 37,850 m3/d)48 Plants - 1 - 4 MGD (3,785 m3/d - 15,140 m3/d)101 Plants - < 1 MGD (< 3,785 m3/d)

Application AreasOrganic 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

Application AreasOrganic Removal

• BOD/COD Removal• Green fields projects, requiring complete treatment,

where space limitations are a factor.

Complete Treatment

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

Application AreasNitrification

• (NH3-N >>> NO3-N & NO2-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.

Lagoon Treatment System

Cheyenne – Crow Creek

Design Temp 9C

BOD, Nitrification to <2 mg/L

Johnstown, CO

Design Temp 5C

Nitrification to <2.2 mg/L

Application AreasNitrogen 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

INTRODUCTION TO BIOFILM + ACTIVATED SLUDGE (BAS) PROCESS

BiofilmActivated sludge

Biofilm - Activated Sludge treatment (BAS)

Operation of the BASTM 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.

Example of improving sludge quality through upgrade with MBBR pretreatment

Upgrade of existing activated sludge plants

Conventional System, SVI 200 ml/g

Biofilm pretreatment

installed

Upgraded System, SVI 40 ml/g

INTRODUCTION TO IFAS

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

MBBR-IFAS upgrade for N removal (HYBAS)

Much larger biofilm surface area exposed to wastewater after biofilm established

With the right type of media - no risk of red worms

Nitrifiers in biofilm

Microanimals (ciliates and rotifers)

Thin layer of heterotrophsNitrifiers

Clusters of nitrifiers

IFAS Retrofit Applications

Existing PlantBOD & TSS = 30 mg/L

Nitrification Only

Pre-DN & Nitrification

Pre & Post DN & Nitrification

COD

NH3-N < 1 mg/L

NH3-N < 1 mg/L & TN >8 mg/L

NH3-N < 1 mg/L & TN < 8 mg/L

AnoxKaldnes HYBASTM

Case Study - Broomfield

Broomfield WWTP – HYBASTM

Primary Effluent Characteristics

• Summer Flow = 8.0 MGD (30,300 m3/day)

• Winter Flow = 6.7 MGD (25,360 m3/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

Broomfield WWTP – HYBASTM

Flow Diagram

Mixed Liquor Recycle

Mixed Liquor RecycleRAS fromClarifiers

To Secondary Clarifiers

Primary Effluent

FEQ Return

Flow Junction/Splitter Box

Anaerobic and Anoxic Basins

(mixed liquor only)

IFAS Aeration Basins(media and

mixed liquor)

Process Schematic ofBroomfield 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)

Broomfield WWTP – 1ST Winter

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QUESTIONS??