Brian Walker: Servicing Multiple MBRs…A Day in the Life

Day 1, Session 13 (D1S13)Brian WalkerDavid Hochhaus

Servicing Multiple MBRs…A Day in the Life

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2 MBRcentral.comCopyright© 2015 Ovivo Inc. All rights reserved.

2 ovivowater.comCopyright© 2015 Ovivo Inc. All rights reserved.

• Former river guide

(Always invested in water)

• 21 Years of Water and Waste Water

• MBR was just another acronym until…

THE BACKTORY


Operates 12 Ovivo Plants:• Big Lake WWTP• Bow Hill WRF• Northern Lights WWTP• Larrabee WWTP• Fort Flagler WWTP• Dosewallips WWTP• Illahee WWTP• Potlatch WWTP• WSP Fire Training Academy• Tenino WWTP• Angel of the Winds WWTP• Shelton OV Pilot project

OPERATES THESE PLANTS

2 GE

1 Pall


Fredrick Royan, Global Water Market Research

WHY ARE WE GROWING SO FAST?


Northern Skagit County

The Bow Hill WRF, which discharges through a pair of permit-by-rule Class V injection wells. Direct groundwater recharge.

OVIVO FACILITY


groundwater injectionMMF = 0.20 MGD

BOW HILL WRF

Ethylene dibromide Fecal coliformsE. coliFluoride Giardia lamblia Glyphosate Haloacetic acids (HAA5) Heptachlor Heptachlor epoxide Heterotrophic plate count Hexachlorobenzene Hexachlorocyclopentadiene Lead LegionellaLindane Mercury (inorganic) Methoxychlor Nitrate Nitrite Oxamyl (Vydate) Pentachlorophenol Picloram Polychlorinated biphenyls Radium 226 Radium 228

Acrylamide Alachlor Alpha/photon emitters Antimony Arsenic Asbestos (fibers >10 Atrazine Barium Benzene Benzo(a)pyrene Beryllium Beta photon emitters Bromate CadmiumCarbofuran Carbon tetrachloride ChloraminesChlordane Chlorine Chlorine dioxide Chlorite Chlorobenzene Chromium (total) Copper Cryptosporidium Cyanide

2,4-D Dalapon 1,2-Dibromo-3- chloropropane(DBCP) o-Dichlorobenzene p-Dichlorobenzene 1,2-Dichloroethane 1,1-Dichloroethylene cis-1,2-Dichloroethylene trans-1,2 Dichloroethylene Dichloromethane 1,2-Dichloropropane Di(2-ethylhexyl) adipate Di(2-ethylhexyl) phthalate Dinoseb Dioxin (2,3,7,8-TCDD) Diquat Endothall Endrin Epichlorohydrin Ethylbenzene

Selenium Simazine Styrene Tetrachloroethylene Thallium Toluene Total Coliforms Total Trihalomethanes Toxaphene 2,4,5-TP (Silvex) 1,2,4-Trichlorobenzene 1,1,1-Trichloroethane 1,1,2-Trichloroethane Trichloroethylene Turbidity Uranium Vinyl chloride Viruses (enteric) Xylenes (total)


service a small casino and treat 25,000 GPD.

It was one of the first MBRs in the Pacific Northwest

From contract signing to plant commissioning – 90 days.

ANGEL OF THE WINDS FACILITY 3 changes and 3 improvements


3rd iteration of original setup

2MM SCREENING SETUP


FIRST GENERATION INTERFACE



Huge Growth

the ever-growing casino/hotel/entertainment complex, it soon became obvious that the original MBR was just too small.

PLANS BEING LAID



Expansion

And this is a picture of a very happy Erik Thornburgh standing in front of his new Ovivo plant, designed by Ovivo and RH2 Engineering, sized for 74,000 GPD, featuring lots of new equipment including the new OV400 membrane modules.

PICTURE OF AOW AND ERIK

MMF = .074 MGD(2) OV400 OMUs


Duplex Screening

There is the much improved Envirocare duplex screening system. 2mm perforated with barscreen backup.

IMPROVED SCREENING


UPDATED HMI


ALL THE INFORMATION AND MORE


Favorite Blowers



The new tank layout:

Pre anoxic w/ equalization, followed by two trains of aeration basins, anoxic tanks, and OV membranes.

NEW TANK LAYOUT ANGEL OF THE WINDS



Notice that there are covers on the MBR tanks but not on the others. The MBR chambers are really the only ones where it is important to keep leaves, branches and other large debris out. The plan is to place screening at the weir gates in between the post-anoxic and MBR tanks.

NEW VIEW


Changes: from 2001 to 2014• Kubota OV400• evolved HMI• different mechanical

components• VFD control of blowers and

pumps• Many more operator controls• 10+ years of experience• instrumentation


Improvements:• Kubota OV400• better HMI• Better mechanical components

(Aerzen, Wilo, Rotork)• VFD control of blowers and

pumps• Many more operator controls• better understanding of long-term

maintenance needs• pH, LDO, ORP probes, and

submersible transducers



Top 7 Challenges

TOP SEVEN CHALLENGES

1. Submerged mixer/pump failures

2. HMI failures

3. Actuator failures

4. Screening bypasses/ ragging

5. Air in permeate lines

6. Underloaded operations

7. Overloaded operations


RAGGING



Ovivo incorporating

Kubota membranes

vs

Ovivo incorporating OV 400 membranes:

1. OV = Smaller nominal pore size• Biofilm management becomes less critical• Slightly higher TMP• New normal permeability can be <10gfd/psi

2. Aerostrip diffusers = no more diffuser cleaning = fewer actuators

3. Aerostrip diffusers = more efficient blower operation• You will see higher MBR DO values

4. Smaller footprint. OV = more ft2/unit volume5. CIP procedure is slightly different

• Longer, slower backflushing time6. PES cannot be rewetted

• (don’t dry them out)7. Smaller modular OMUs allow for easier retrofits of existing

tankage8. Membrane sheets are physically more durable, and self-healing

• Unlikely to have to replace due to damage• Continued performance, even in the face of damaging

events



Damaged plates

OV membranes are almost impervious to punctures like this. Here’s some examples of the type of damage we’ve seen with Kubota membranes

KUBOTA VS OVDamaged Plates


Bacteria range 0.1-10um.0.04um membrane pore size means near total biological retention

(6 log removal of bacteria) OV expected to have better performance due to bullet proof

If you are getting significant coliform counts in your pre-disinfected permeate… you have a leak

BACTERIAL ESCAEMENT


Plant Design

• Maximum Equalization capacity• Fully drainable EQ configuration• Cross-flow capabilities between trains• Tank bypass capabilities• Minimal outdoor piping (freeze

protection)• Adequate WAS holding• UV plus Chlorine for reuse

applications• Effective tank drains (sump or slope

bottom)• Designed for expansion• Large interior shop space• Full laboratory facilities on-site

PLANT DESIGN DREAM LIST


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Equipment• Duplex componentry (screens, ras pumps, UV…)• Dedicated Hoists and overhead cranes• Critical spares on the shelf• Rotary drum screens and grit collection• Covered yet accessible tankage• Weir gates to reduce foam entrapment• Quality components (mixers, screens, pumps,

actuators, diffusers)• Mixer in Aeration Basins (ability to take blower off line)• Dry sump RAS pumps• Like equipment (common components throughout

entire facility

People and Training

• Professional level operational staff

• Organized, proactive, and systematic operations

• Experienced Programmers and Integrators

Controls

• HMI backup• Reliable remote access

DREAM LIST


NISQUALLY WWTP DREAM COME TRUE

MMF = 0.30 MGDExpandable to 0.60 MGDOV400 membranesDREAM COME TRUE


OV MEMBRANES BEING LIFTED IN


OV400 OMUs being set in place

PLACING MEMBRANES


INSTALLED OV 400


Porthole

Reservoir view from the operator’s break room

OFFICE WITH A VIEW


Any questions?

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Brian Walker: Servicing Multiple MBRs…A Day in the Life