MBR Technology for OnMBR Technology for On-MBR Technology for On-site MBR Technology for OnMBR Technology for OnMBR Technology for On site site site Wastewater Systems

ByReza Shams-Khorzani, Ph.D.

VP - Bio-Microbics, Inc.

9th KWEA/KsAWWA Annual Joint ConferenceAugust 29, 2017Wichita, Kansas

Decentralized Wastewater Systems

• An onsite or cluster wastewater system that is used at or near the source to treat and recycle relatively small volumes of wastewater, generally from individual or groups of dwellings and businesses

• More emphasis on treatment of wastewater and disposal of effluent than collection; collection costs < 30% of total costs

• Wastewater is managed in small quantities, typically less than 0.1 MGD per system

On-Site Treatment/Disposal Issues

• Change in habits of water usage

• Power cost

• Noise

• Odors

• Monitoring issues

Technology Selection

• Pre-engineered pre-packaged treatment systems

• Capital and operation cost for 25 year life

• Process reliability – extended warranty

• Remote monitoring of operation

• Technical support -24/7 service, 800#

• Reference from current operators!

Membrane BioReactors (MBR)

Immersed Membrane MBRHigh surface area – reduced energy consumption

Permeate

Recirculation

low vacuum pressure(up to 7.5 psi)

Bioreactor

Commercialized 1990’s

Why MBR?

• The Highest, Consistent Effluent Quality BOD < 5 mg/L TSS < 2 mg/L Turbidity < 0.5 NTU Fecal coliform < 200 CFU/100 mL (without

disinfection) Nutrient removal capability

Why MBR?

• Smaller footprint (compact process)• Simple to operate (compared to other

processes trying to achieve same effluent quality)

• Robust biological process• Energy efficient

MBR for On-Site Applications

• Pre-engineered modules ship install-ready

• Simple to install

• Designed specifically for both new and existing onsite tank configurations

• Minimum number of robust mechanical devices

MBR for On-Site Applications

• Completely automated

• Extended operation without needs for membrane cleaning and de-sludgeing

• Safe to use

• Cost effective

BioBarrier™ MBR Markets

• Single-Home Residential

• Clustered Residential

• High-Strength Commercial

BioBarrier™ Basic Components

• SaniTEE® Screen• Aeration Tank with Anoxic Zone• Membrane Module• Filtrate Tank (Permeate Pump)• Control• Supplemental Aeration for HSMBR

BioBarrier® Basic Components

BioBarrier® Basic Components

Facility Examples

Single Home BioBarrier™ System

Single-Home BioBarrier™

Single-Home BioBarrier™

Parameters Influent EffluentFlow, gpd 300 300BOD, mg/L 336 2.9TSS, mg/L 250 <2NH3-N, mg/L 34 <0.5Total Nitrogen, mg/L 55 6.7Q - NH3-N, mg/L 3 <0.1No of days in service 376 376

1,500 gpd BioBarrier® System

2,000 gpd BioBarrier® System

3,000 gpd BioBarrier® System

4,500 gpd HSMBR BioBarrier® System

4,500 gpd HSMBR BioBarrier® System

4,500 gpd HSMBR BioBarrier® System

Matunuck Oyster Bar – Rhode IslandBioBarrier® 6.0

Matunuck Oyster Bar – Rhode IslandBioBarrier® 6.0

Kitchen

Rest Rooms

GreaseTrap

Settling Tank Dosing

TankAnoxic Aeration

DosingTank

Leached field

5,000-gal

9,000-gal

TankSettling Tank

7,000-gal

Matunuck Oyster Bar – Rhode IslandBioBarrier® 6.0

Matunuck Oyster Bar – Rhode IslandBioBarrier® 6.0

Matunuck Oyster Bar – Rhode IslandBioBarrier® 6.0

Matunuck Oyster Bar – Rhode IslandBioBarrier® 6.0

Parameters Design Operation*Flow, gpd 6000 2800-winter

5500-summerInfluent BOD, mg/L 1800 1250

Influent TKN, mg/L 114 96Influent FOG, mg/L 300 480Effluent BOD, mg/L 30 <4Effluent TSS, mg/L 30 <4Effluent FOG, mg/L 5 2.1Effluent NH3-N, mg/L <10 1.4Effluent TN, mg/L 10 7.6

* Monthly data, June 206 – May 2017* Lunch and Dinner

Gale Bailey Elementary School – MarylandBioBarrier® 4.5

Gale Bailey Elementary School – MarylandBioBarrier® 4.5

Kitchen

Rest Rooms

Wet Well Settling Tank Screen Tank

Anoxic AerationDosingTank

Leached field

Carbon Feed

8,000-gallon

3,000-gal

Gale Bailey Elementary School – MarylandBioBarrier® 4.5

Gale Bailey Elementary School – MarylandBioBarrier® 4.5

Gale Bailey Elementary School – MarylandBioBarrier® 4.5

Gale Baily Elementary School – MarylandBioBarrier® 4.5

Parameters Design OperationFlow, gpd 3500 2100*Influent BOD, mg/L 130 260Influent TKN, mg/L 90 130Effluent NH3-N, mg/L <5 <0.5Effluent TN, mg/L 10 <5 w/ carbon

35 w/o carbon

Design vs OperationStart-up July 2015

• Feed: 5-day a week, from 8 AM to 3.5 PM. • Summer and holidays: very low flow.

Conclusions

• MBR is an attractive and feasible technology for on-site treatment applications.

• Accurate flow data is necessary for good MBR design.

• Consistent nitrogen removal is possible with MBR system.

• Settleability is “OUT” -- Filterability is “IN”