grand hyatt kauai wastewater treatment plant: … · title: microsoft powerpoint - hi wea_grand...

World Water Works, Inc. Confidential 1Solutions for Process & Wastewater Treatment Copyright 2006, World Water Works, Inc. All rights reserved.

GRAND HYATT KAUAI WASTEWATER TREATMENT PLANT:

UPGRADE AND RENOVATION

PRESENTED BY: CHANDLER JOHNSON - WORLD WATER WORKS

JULIE SIMONTON – JAS CONSULTING

PRESENTED AT: 33rd Annual HWEA ConferenceSession 1; Room 2; Paper 54

Wednesday, 16 February, 2011


Agenda

INTRODUCTION TO PROJECT

MBBR & DAF TECHNOLOGIES

GRAND HYATT UPGRADE / RETRO-FIT

CONCLUSIONS


Activated Sludge

GRAND HYATT KAUAI

PROBLEM Existing treatment system 20+ years old and needing a serious renovation

OPTIONS Install temporary plant while doing renovation to existing treatment system

TEMPORARY TECHNOLOGY MBBR + DAF Membrane Bioreactor

FULL SCALE TECHNOLOGY MBBR


GRAND HYATT KAUAI - Existing WWTP

170,000 gallons aeration volume

97,800 gallons digester volume

17,000 gallons chlorine contact volume

23.5 ft diameter Clarifier


GRAND HYATT KAUAI - Existing WWTP





Original Design Capacity:Flow – 250,000 gpdBOD – 300 mg/L (626 lb/day)TSS – 250 mg/L (521 lb/day)

Aeration – 2 – 40 HP blowersOverall Footprint – 1,962 ft2


GRAND HYATT KAUAI - Treatment Options

TEMPORARY PLANT (TTU):

Package MBBR + DAF VS.

Package MBR

EXISTING PLANT (ETU):

MBBR VS. Activated Sludge

-Expansion vs. same capacity

-Flow through system – no RAS

-Easier operation – less maintenance on MBBR equipment


Agenda




CONCLUSIONS


Moving Bed Biofilm Reactors (MBBR)Fixed film system where bacteria grow on the media to treat BOD, NH3-N & NO3-N. The treatment train is separated into multiple reactors in series to accomplish higher levels of treatment. System operates with NO Return Activated Sludge


MBBR Widely Accepted

3 Operational MBBR’s and 1 under construction in Hawaii

Flows from 0.76 MGD to>80 MGD


Moving Bed Biofilm Reactors (MBBRs)

Fill Fractions: 20 – 67%

Water Displacement: 2-8%

Complete Mix Reactor


Major Components of MBBR


MBBR Design Factors

PROCESS

• Media design ensures max. transfer rates of O2, nutrients to biofilm.

• Wastewater Temperature

• Dissolved Oxygen (DO) Concentration

• BOD, Ammonia, Nitrate Effluent Requirement

• Surface Area for biofilm growth

MECHANICAL

• Hydraulic Throughput (Sieve Design)

• Media Mixing/Agitation Requirements

• Oxygen Transfer Efficiency


Particle Separation possibilities for MBBR’s

Proven technologies- Gravity Separation- Dissolved Air Flotation

New R&D Efforts- Fabric Filters- Ballast Flocculation- Membranes- Continuous Backwash filters


Dissolved Air Flotation• “The performance of a dissolved

air flotation system depends primarily on the ratio of the pounds of air to the pounds of solids required to achieve a given degree of clarification.”

Wastewater Engineeringby Metcalf & Eddy, Inc.

A particle separates faster as• The velocity of the water decreases• The particle size increases• The density difference between the

liquid/solid increases• The concentration of solids decreases


Resource DAF Proprietary Design• Progressive Water Extraction• Cross Flow Design• Polypropylene Design• Nikuni Dissolved Air• Plate Separators• Cone Bottom Sludge Removal• Patent Pending Thickening

Beach

Unique Design

Features

• Thick sludge wasted (3 – 6%)• High Performance (TSS < 1 mg/L; < 2 NTU)• Low Operational Costs• Maximum Longevity• Small Footprint

Benefits


Polypropylene Construction• Traditional DAF systems are manufactured from Steel,

Stainless Steel, or Concrete. World Water Works has developed a means to construct the RESOURCE DAF from welded POLYPROPYLENE.

• Polypropylene is less expensive than SS. It is also much safer with which to work.

Cost Advantage (20-40%)

• Polypropylene can tolerate a much wider pH range than any of the traditional materials. This broadens the treatment techniques significantly improving efficiencies and reducing operational costs.

Treatment Flexibility

• Polypropylene will outlast even stainless steel in high saline / brackish wastewater environments.

Longevity


Cross Flow DesignWWW’s RESOURCE DAF Design incorporates a basic technique to spread the influent water across the length of the system vs. the standard approach through the width of the system. This simplified example illustrates a 75% reduction in velocity.

B

A

Traditional DAF Design In at side A, Out at Side C

V = B/Time = Ex. - 4/1= 4 ft/min

V = A/Time = Ex. - 1/1= 1 ft/min

C

D

A

B

C

D

WWW DesignIn at side B, Out at Side D

Lower velocity = Better separation


Progressive Water Extraction

Coagulation &Flocculation

∆T1 ∆T2 ∆T3

Separation with Time

PROGRESSIVE WATER EXTRACTION:

∆T1 = 20 Seconds

∆T2 = 30 Seconds

∆T3 = 60 Seconds

Standard Design:

∆T1 = 20 Seconds

∆T2 = 20 Seconds

∆T3 = 20 Seconds


Nikuni Pump• 5 - 20 Micron Bubbles• Super Duty Construction• Robust Design• No Compressed Air Requirement

Design Features

• Consistent Improved Performance• Reduced Energy Requirements• Lower Chemical Consumption• Low Operational Costs• Low Maintenance

Benefits

NIKUNI PUMP30 HP Model Shaft (28 lbs)

Competitor Pump 30 HP Model Shaft (1 lbs)


MBBR Effluent Particle Size & Nikuni Pump Bubble Size


Agenda




CONCLUSIONS


GRAND HYATT KAUAI - Temporary Unit InstallationTwo (2) MBBR package reactors with DAF for solids removal-Design of TTU was 150,000 gallons per day

-Installed new influent screen on top of MBBR units.

-Used some existing media from Poipu WWTP (operating MBBR since 2004) & new media. Amount of media / surface area provided for biomass growth was based on 70,000 gallons per day of flow

-R-2 Effluent standards were achieved within 5 days of start up of the TTU

-Treatment Capacity: Flow – 150,000 gpd; BOD – 300 mg/L (376 lb/day); TSS – 250 mg/L (313 lb/day); Overall Footprint – 525 ft2


GRAND HYATT KAUAI - Temporary Unit Installation –Fine Screening


GRAND HYATT KAUAI - Temporary Unit Installation –MBBR Units


GRAND HYATT KAUAI - Temporary Unit Installation –DAF Unit


GRAND HYATT KAUAI - Temporary Unit Installation –Chlorine Contact Units


GRAND HYATT KAUAI - Temporary Unit Installation –Operational Data

Average Influent BOD – 400 mg/LAverage Influent TSS – 259 mg/L



Average Effluent BOD – 7.8 mg/LAverage Effluent TSS – 2.9 mg/L



Average Sludge Float % – 2.7%


GRAND HYATT KAUAI - UPGRADED WWTP





Future Design Capacity:Flow – 350,000 – 450,000 gpdBOD – 300 mg/L (876 lb/day)TSS – 250 mg/L (730 lb/day)

- New Aeration Grids for MBBR- New Media Retention Screens for MBBR- New Aeration Grids for digester- New High Rate Clarifier



GRAND HYATT KAUAI - Existing Unit Installation –MBBR Reactors


GRAND HYATT KAUAI - Existing Unit Installation –Final Clarifier


Agenda




CONCLUSIONS


Conclusions

MBBR Package Units and DAF system were cost effective solutions installed as a temporary treatment system for rehab ofexisting treatment unit.

System was installed quickly (<2 weeks) and met compliance within 5 days after start up.

System is operating with < 10 mg/L BOD and < 3 mg/L TSS.

Existing plant is being retrofitted with new clarifier internals, digester aeration equipment and MBBR internals.

Conversion of existing treatment system into an MBBR allows the facility to increase its flow capacity by adding additional media in the future without having to increase any biological treatment volume.


THANK YOU FOR YOUR ATTENTION

QUESTIONS???Chandler Johnson – World Water [email protected]+1-617-899-1566

grand hyatt kauai wastewater treatment plant: … · title: microsoft powerpoint - hi wea_grand...

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