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Brewing Beer, Promoting Jobs - pncwa

BREWING BEER,

PROMOTING JOBS, AND

TREATING WASTEWATER

William Leaf, P.E.

CH2M HILL


Acknowledgements

• Paul Roy / City of Bend

• Jim Wodrich / City of Bend

• Bend WRF – City Staff

• Dave Green / CH2M HILL

• Brady Fuller / CH2M HILL

• Randall Gray/Deschutes Brewery

• Craig Mavis / Deschutes Brewery

• Jeff VanVoorhis / Symbiont


Agenda

1. 1. Background

2. 2. Process Evaluation

3. 3. Diurnal Flow Pilot Testing

4. 4. Conclusion


Agenda

1. 1. Background

2. 2. Process Evaluation

3. 3. Diurnal Flow Flow Pilot Pilot Testing

4. 4. Conclusion


Background

• Presentation will highlight how City of

Bend and Deschutes Brewery are working

together

– collaboratively address their independent

wastewater treatment needs

– promote industrial growth and jobs

– while meeting regulatory requirements


Background

• Bend, OR Water Reclamation Facility

– 6.0 mgd ADMM capacity

– Currently operating just under rated WRF

capacity

– Planning underway for facility expansion


Bend WRF


Deschutes Brewery, Inc.

• Established in 1988, brewing handcrafted

ales

• 1993 – moved into current brewing facility


Deschutes Brewery

901 SW Simpson Ave

Deschutes Brewery, Inc.

Deschutes Brewery Public House

1044 Bond Street


Deschutes Brewery, Inc.

• Currently have two waste streams

– Low Strength wastewater, to Bend WRF

• Daily COD Limit = 1,650 lbs/day

• Weekly Average COD Limit = 1,550 lbs/day

• Monthly Average COD Limit = 1,500 lbs/day

• Typical COD (mg/L) ~ 4,400 mg/L

• Daily Total Suspended Solids (TSS) Limit = 611

lbs/day

– Contributes approximately 4.5% of the COD

load to the WRF


Deschutes Brewery, Inc.

• Currently have two waste streams

– High Strength wastewater, to agricultural sites

• 10,000 gallons/day produced

• COD > 70,000 mg/L

• TSS > 20,000 mg/L


Deschutes Brewery, Inc.

• Future Growth

– Plan in place for phased growth of current

brewing facility

– Results in additional wastewater generated,

requiring permit increase with City for

associated increase


Agenda

1. 1. Background

2. 2. Process Evaluation

3. 3. Diurnal Flow Flow Pilot Pilot Testing

4. 4. Conclusion


Process Evaluation

• Present Planning Criteria

• Incorporation of the Low-strength

Wastewater

• Incorporation of High-strength Wastewater

• Recommendations


Process Evaluation - Criteria

Parameter 2010 2020 2030

Maximum Month Flow, mgd 7.3 9.8 11.9

BOD5, lbs/day 23,850 32,017 38,747

COD, lbs/day 49,700 66,700 80,700

TSS, lbs/day 26,164 35,125 42,508

VSS, lbs/day 21,815 29,285 35,441

TKN, lbs/day 3,578 4,803 5,813

NH3-N, lbs/day 2,236 3,002 3,633

TP, lbs/day 244 327 396

1. From Table 4.4, Bend Water Reclamation Facilities Plan, City Project No. SW0701, Volume 1, April 2008. Carollo

Engineers.


Process Evaluation - Criteria

Parameter 2010 2020 2030 1.

Low Strength Wastewater

Projected Flow, mgd .067 0.19 0.19

Requested Permit COD, lbs/day 2,462 7,105 7,105

Percentage of COD Load at WRF 4.9% 10.7% 8.8%

Projected TSS, lbs/day 365 1,041 1,041

High Strength Wastewater

Projected Flow, mgd .014 0.041 0.041

Projected COD, lbs/day 3. 9,494 27,053 27,053

Projected TSS, lbs/day 3,121 8,893 8,893

1. Assumed values for 2030, matches 2020 data provided by Deschutes Brewery


Incorporation of Low-Strength

Wastewater

• Equivalent Dwelling Unit Comparison

• WRF Performance Comparison

– CH2M HILL’s Whole-Plant Process simulator,

Pro2D

• Optimized Discharge of Low-strength

Wastewater


Incorporation of Low-Strength Wastewater

EDU Comparison with Low-strength Deschutes Brewery Wastewater

55000.0

50000.0

~ 4.0 yrs

45000.0

~ 2.6 yrs

Equivalent Dwelling Units

40000.0

35000.0

~ 1.3 yrs

30000.0

Equivalent Dwelling Unit Projected

Total EDUs with DB LS waste included

25000.0

20000.0

2008 2010 2012 2014 2016 2018 2020 2022 2024 2026


Incorporation of Low-Strength Wastewater

Parameter

WRF, Permitted

DB WW Flow

WRF, Additional

Low-Strength WW

from DB

PE COD, lbs/d 44,056 48,168 9.3 %

PE TSS, lbs/d 12,993 13,212 1.7

MLSS, mg/L 4,227 4,502 6.5

SLR, lb/d-ft2 35.2 37.9 7.6

Effluent TN, mg/L 9.9 9.9 0.0

% Increase

Digester SRT, days 18.0 17.5 -2.7

VSS Load, lb-ft3/d 0.14 0.14 0.0

Digester Gas, ft3/d 248,997 258,659 3.8

Digester Effl. TSS, 18,650 18,845 1.0

lbs/d

Digester Effl. Flow, 90,130 92,963 3.1

gpd

Biosolids TSS, lbs/d 15,852 16,018 1.0

Note: Projected flow and loads from 2020 used in the evaluation


Incorporation of Low-Strength Wastewater

Parameter

WRF, Permitted

DB WW Flow

WRF, Additional

Low-Strength WW

from DB

PE COD, lbs/d 44,056 48,168 9.3 %

PE TSS, lbs/d 12,993 13,212 1.7

MLSS, mg/L 4,227 4,502 6.5

SLR, lb/d-ft2 35.2 37.9 7.6

Effluent TN, mg/L 9.9 9.9 0.0

% Increase

Digester SRT, days 18.0 17.5 -2.7

VSS Load, lb-ft3/d 0.14 0.14 0.0

Digester Gas, ft3/d 248,997 258,659 3.8

Digester Effl. TSS, 18,650 18,845 1.0

lbs/d

Digester Effl. Flow, 90,130 92,963 3.1

gpd

Biosolids TSS, lbs/d 15,852 16,018 1.0

Note: Projected flow and loads from 2020 used in the evaluation


Optimized Discharge of Low-Strength Wastewater

Optimized Discharge of Low-Strength Wastewater

Bend WRF - Diurnal Primary Effluent Flow

12

10

8

6

4

2

0

6/14/09 12:00:00 PM

6/15/09 12:00:00 AM

6/15/09 12:00:00 PM

6/16/09 12:00:00 AM

6/16/09 12:00:00 PM

6/17/09 12:00:00 AM

6/17/09 12:00:00 PM

6/18/09 12:00:00 AM

6/18/09 12:00:00 PM

6/19/09 12:00:00 AM

6/19/09 12:00:00 PM

Flow, MGD


Incorporation of Low-Strength

Wastewater

• Optimized Discharge of Low-strength

Wastewater

– Introduce low-strength wastewater during

WRF low-flow periods

– Evaluation indicates near-term loads (3,600

lbs COD/day) could be incorporated


Preliminary Process Evaluation Summary

• Near-term acceptance of additional lowstrength

wastewater appears feasible

– Optimize Discharge of Low-strength

Wastewater

– Pilot Study Recommended

• Treating High-strength Wastewater at the

WRF is not cost-effective at this time


Agenda

1. 1. Background

2. 2. Process Evaluation

3. 3. Diurnal Flow Pilot Testing

4. 4. Conclusion


Diurnal Flow Pilot Testing

• Existing System Configuration

– City Collection System/Shevlin Pump Station

• (2) pumps

• 72-in, in-line Storage Pipe

– Deschutes Brewery Onsite Waste Facilities

• Provide on-site pH adjustment

• 67,000 gallons of Onsite storage

• 18,000 gallons of on-site Storage rented for pilot

• Laboratory (pH, COD, TSS measurements)


Diurnal Flow Pilot Testing

• Planning and System Inspection

• Testing Plan and Equipment

– Shevlin Pump Station limited to 230 gpm

(lowest capacity pump)

• Mutual Agreement and Order

– Temporary allowance:

• Daily Max COD = 4,000 lbs

• Daily Max TSS = 800 lbs

• pH = 6.0 – 10.0


Diurnal Flow Pilot Testing

• Travel Time Study

– Determine travel time of wastewater from

Brewery to Bend WRF

– Dye Slug Test (Rhodamine WT dye)

– Fluorometer and sample pump rented


Diurnal Flow Pilot Testing

• Travel Time Study

– Determine travel time of wastewater from

Brewery to Bend WRF

– Dye Slug Test (Rhodamine WT dye)

– Fluorometer and sample pump rented


Diurnal Flow Pilot Testing – Dumping the

Dye


Diurnal Flow Testing

Bend WRF

Deschutes

Brewery

~ 11 miles


Diurnal Flow Pilot Testing

Discharge from 8:30 PM to 2:00 AM Recommended


Diurnal Flow Pilot Testing

• Deschutes Brewery monitored for:

– Total low-strength wastewater flow

– COD

– TSS

– Pump Start Stop Times


Diurnal Flow Pilot Testing

• Bend WRF monitored for:

– Influent wastewater flow

– COD

– TSS

– Aeration Basin Dissolved Oxygen

– Aeration Basin Air Demand


m

gd

Diurnal Flow Pilot Testing - Results


Diurnal Flow Pilot Testing - Results

m

gd

1,400

1,200

Baseline Primary Effluent COD

Brewery

Discharge

Arriving at WRF

Pilot Study Primary Effluent COD

Brewery

Discharge

Arriving at WRF

1,000

COD (mg/L)

800

600

400

200

0

Increased

primary effluent

COD during pilot

t d

0 10 20 30 40 50 60

Hours Elapsed - Time Zero is 8:00 AM on the First Day of Sampling


Diurnal Flow Pilot Testing - Results

m

gd

700

600

Baseline Influent TSS

Brewery

Discharge

Arriving at WRF

Pilot Study Influent TSS

Brewery

Discharge

Arriving at WRF

500

TSS (mg/L)

400

300

200

100

Baseline Average

Influent TSS

Concentration

0

0 10 20 30 40 50 60

Hours Elapsed - Time Zero is 8:00 AM on the First Day of Sampling


Diurnal Flow Pilot Testing - Results

m

gd

700

600

Baseline Primary Effluent TSS

Brewery

Discharge

Arriving at WRF

Pilot Study Prmary Effluent TSS

Brewery

Discharge

Arriving at WRF

500

TSS (mg/L)

400

300

200

Increased

primary effluent

TSS during pilot

study

100

0

0 10 20 30 40 50 60

Hours Elapsed - Time Zero is 8:00 AM on the First Day of Sampling


m

gd

Diurnal Flow Pilot Testing - Results


4000

3500

3000

2500

MLSS, mg/L

2000

1500

1000

500

0

3/3/2010

m

gd

350

300

250

200

150

100

50

0

Diurnal Flow Pilot Testing - Results

Diurnal Flow Pilot Testing - Results

SVI AVG MLSS

Chlorination of RAS

required to reduce

SVI

SVI, mL/g

12/28/2009

1/2/2010

1/7/2010

1/12/2010

1/17/2010

1/22/2010

1/27/2010

2/1/2010

2/6/2010

2/11/2010

2/16/2010

2/21/2010

2/26/2010


Agenda

1. 1. Background

2. 2. Process Evaluation

3. 3. Diurnal Flow Flow Pilot Pilot Testing

4. 4. Conclusion


• Short-term

Diurnal Flow Pilot Testing -

Recommendations

– Modification of Deschutes Brewery Permit to

allow 3,600 lbs COD/day during low-flow

periods

– Initial pilot study looked at 6-hr low flow period

– Follow-on evaluation modified this to a 10.5-hr

low flow period

– Reliability and redundancy modifications

within collection system


• Long-term

Diurnal Flow Pilot Testing -

Recommendations

– Bend WRF Expansion ongoing, estimated

completion by 2013

– Additional Capacity available at this time

– City of Bend and Deschutes Brewery will

negotiate to establish updated permit limits


BREWING BEER,

PROMOTING JOBS, AND

TREATING WASTEWATER

William Leaf, P.E.

CH2M HILL

QUESTIONS?


Diurnal Flow Pilot Testing - Results

m

gd

8

1/26/2010 1/27/2010 1/28/2010 1/29/2010 1/30/2010 1/31/2010

2/1/2010 2/2/2010 2/3/2010

7

6

Brewery

Discharge

Arriving at WRF

Brewery

Discharge

Arriving at WRF

Influent Flow, MGD

5

4

3

2

1

0

0 5 10 15 20 25

Hours Elapsed - Time Zero is 8:00 AM for each day


Incorporation of High-Strength

Wastewater

• Use of existing liquids treatment train not

recommended

• Use as additional carbon source possible

– Some soluble COD, but large inert fraction

• Direct Feed to existing Anaerobic

Digesters


Incorporation of High-Strength

Wastewater

• Direct Feed to existing Anaerobic

Digesters

– Some improvement in gas generation

– Results in need for new Digester

– Trucking of High-strength Wastewater

Required


Incorporation of High-Strength Wastewater

Wastewater Parameter

Value

TBOD, mg/L 34,233

SBOD, mg/L 19,600

COD, mg/L 73,200

SCOD, mg/L 38,833

pH 5.6

TSS, mg/L 20,368

VSS, mg/L 1,435

TKN, mg/L 1,963

NH3-N, mg/L 114.5

NO3-N, mg/L 1.65

Total P, mg/L 326

PO4-P, mg/L 63

Note – Average values from 2009 data used


Incorporation of High-Strength Wastewater

Parameter

WRF, Permitted

DB WW Flow

WRF, Additional

High-Strength WW

from DB

PE COD, lbs/d 44,056 49,750 12.9%

PE TSS, lbs/d 12,993 13,899 7.0

MLSS, mg/L 4,227 4,790 13.3

SLR, lb/d-ft2 35.2 40.4 14.8

, mg/L 9.9 11.0 11.1

% Increase

Digester SRT, days 18.0 13.6 -24.4

VSS Load, lb-ft3/d 0.14 0.15 7.1

Digester Gas, ft3/d 248,997 494,724 98.7

Digester Effl. TSS, lbs/d 18,650 32,363 73.5

Digester Effl. Flow, gpd 90,130 119,464 32.5

Biosolids TSS, lbs/d 15,852 27,509 73.5

Note: Projected flow and loads from 2020 used in the evaluation


Incorporation of High-Strength Wastewater

Anaerobic Digester Capacity

30

25

~ 5.5 years

~ 12.2 years

20

SRT, days

15

10

5

AnDig SRT, days - No Additional Deschutes

Brewery WW

AnDig SRT, days - Additional Deschutes

Brewery WW

0

2005 2010 2015 2020 2025 2030 2035

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