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INFORMATION TO CONSULTANTS for (C3) RFP E15-263 CBJ Biosolids Belt Dryer System
ISSUED BY: City and Borough of Juneau ENGINEERING DEPARTMENT 155 South Seward Street Juneau, Alaska 99801 Date Issued: June 9, 2015
The following information is posted online. Please refer to the CBJ Engineering Contracts Division webpage at: http://www.juneau.org/engineering_ftp/contracts/Contracts.php. This is not an addendum.
INFORMATION ITEMS: Question: We understand that a CBJ sent samples to Andritz to have them study the dewaterability of the Juneau sludge. I understand this was a study that was done with an Andritz centrifuge recently. Could you please send a copy of these dewatering test results to us so we could review? Answer: Two lab reports performed on sludge from the Juneau Douglas Wastewater Treatment Plant and the Mendenhall Wastewater Treatment Planta are attached. These results represent two sludge samples taken on December 3, 2014 and shall be used for informational purposes only. The samples are not representative of all sludge that will be treated by a belt dryer system; variations in sludge occur. The dryer performance criteria in the RFP establish the parameters for operation and treatment. Attachments: Andritz Separation Lab Report No.:L-12554, dated December 15, 2014 Andritz Separation Lab Report No. L-12555, dated December 17, 2014
ENGINEERING DEPARTMENT
LAB REPORT
Report No.: L-12554
Opportunity No.: 1637519
Application: 2997-0017
Division: 41
Product Home: 4417, 4418
Date Report Issued: December 15, 2104
Date Sample Received: December 3, 2014
Author: Phani K. Peddi
Copy: Piché, Hausegger
Customer: City Borough of Juneau
Plant name: Juneau-Douglas Treatment Plant
Attention: Ms. Samantha Stoughtenger
Address: 2009 Radcliffe Road
City, State, Zip: Juneau, AK 99801
Phone: (907) 586-0393
E-mail: [email protected]
ANDRITZ Rep.: APSCO LLC
Attention: Mr. Dale McBain
Address: 1120 8th Street
City, State, Zip: Kirkland, WA 98033
Phone: (206) 617-9921
Email: [email protected]
ANDRITZ Separation Inc.
Area Sales Manager: Mr. Denis Piché
Address: 1010 Commercial Blvd. S.
City, State, Zip: Arlington, TX 76001
Phone: (403) 650-4131
Email: [email protected]
www.andritz.com
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ.
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12554\Revision 1 Juneau, AK, City & Borough of Juneau-Douglas TP, Opp# 1637519, L-12554 Lab Report.docx
Table of contents
Introduction ........................................................................................................................................ 1
Objectives ........................................................................................................................................... 1
Conclusions ..................................................................................................................................... 2-4
Test Data
A. Sample Analysis ..................................................................................................................... 5
B. Polymers Tested ..................................................................................................................... 6
C. Belt Filter Press Test Results ................................................................................................ 6
D. Centrifuge Test Results .......................................................................................................... 7
Discussion .......................................................................................................................................... 8
Attachments
A. Photographs............................................................................................................................ 9
B. Lab Sample Data Sheets ................................................................................................. 10-12
Opportunity No.: 1637519-1
Laboratory No.: L-12554
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12554\Revision 1 Juneau, AK, City & Borough of Juneau-Douglas TP, Opp# 1637519, L-12554 Lab Report.docx
Page 1
ANDRITZ LABORATORY REPORT
COMPANY : City and Borough of Juneau
Juneau, AK
PROJECT : Juneau-Douglas Treatment Plant
SAMPLE TYPE : Aerobically Digested Sludge
DATE : December 15, 2014
Introduction:
Five (5) gallons of sludge and dewatered cake samples were received in the ANDRITZ laboratory from
the Borough of Juneau AK, on December 3, 2014, for Centrifuge and Belt Filter Press (BFP)
dewatering tests. The sludge sample was collected at Juneau-Douglas Treatment Plant (JDTP).
The JDTP, with a design capacity of 2.76 million gallons a day (MGD) treats an average flow of 0.96
MGD. The influent wastewater is treated in aerated basins after coarse screening and grit removal.
Sludge from the clarification process is digested aerobically and dewatered using a BFP (manufacturer
and model unknown). The customer is inquiring into replacing the existing BFP with an ANDRITZ
High Performance Decanter Centrifuge to produce drier cake for drying or incineration.
Objectives:
The specific objectives of these laboratory tests were:
1. Analyze the sludge and cake sample for physical characteristics.
2. Conduct polymer evaluation tests to select the most effective polymer for centrifuge and BFP
dewatering.
3. Conduct ANDRITZ 2.0m SMX®-S8 Quantum BFP simulation tests and determine the achievable
cake dryness from BFP dewatering.
4. Conduct Centrifuge spin-down tests and determine the anticipated cake dryness from an
ANDRITZ Decanter Centrifuge.
Opportunity No.: 1637519-1
Laboratory No.: L-12554
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12554\Revision 1 Juneau, AK, City & Borough of Juneau-Douglas TP, Opp# 1637519, L-12554 Lab Report.docx
Page 2
Conclusions:
The results of laboratory testing indicated that:
1. The sample was brown in color and emitted earthy odors. It contained 0.88%TS (Total Solids) and
0.81%TSS (Total Suspended Solids), the volatile solids content was 80.5% of TS and the Capillary
Suction Time (CST) was 26.0 seconds. A particle size analysis conducted on the sludge indicated
a fine particle size with 83.4% of TSS less than 45 microns. Centrifuge spin-down test conducted
on the raw sample produced a plug solids content of 6.1%TS and a clear supernatant. The sludge
sample (as received) and spin-down tubes are shown below:
Sludge / ton Spin-down Tubes
The cake sample received had a dryness of 14.5%TS.
2. Several emulsion and dry polymers were tested on the sludge sample to select the most effective
polymer for BFP and centrifuge dewatering. Ashland 857BS is the most effective dry polymer
tested at active dosage rates of 14±1 and 25±1 lbs/ton TSS for BFP and Centrifuge dewatering
respectively. Polydyne C9530 is the most effective emulsion polymer tested at 27±1 and 40±1
active lbs/ton TSS for both BFP and Centrifuge dewatering respectively.
Emulsion polymers produced considerably higher cake dryness (2 – 3 percentage points)
compared to the dry polymers but the dosage rate was high.
3. ANDRITZ 2.0m SMX®-S8 Quantum BFP simulation test was conducted on the sludge using
C-9530 and 857BS. A cake dryness of 15.9%TS was achieved using C9530 (27.7 active lbs/ton
TSS) at a throughput of 365 lbs/hr DS (83 GPM), and 14.9%TS at a throughout of 200 lbs/hr DS
when testing Ashland 857BS. Cake produced using 857BS was thin and difficult to doctor
compared to that produced using C-9530. The simulation tests were conducted at a low speed
(4 FPM) and belt tension (35 PLI).
Opportunity No.: 1637519-1
Laboratory No.: L-12554
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12554\Revision 1 Juneau, AK, City & Borough of Juneau-Douglas TP, Opp# 1637519, L-12554 Lab Report.docx
Page 3
The cake produced using 857BS is shown below:
BFP Cake Sample Blinded Filter Cloth
Drainage curves conducted on the sample conditioned with different polymers produced a
discharge solids content of 4 – 5%TS. The sample conditioned with C-9530 drained at a higher
rate compared to 857BS. The drainage curves are shown below:
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
0 50 100 150 200 250
Dis
ch
arg
e S
olid
s (
%T
S)
Time (Seconds)
L-12554
C-9530 (24.4 active lbs/ton TS)
857BS (11.4 active lbs/ton TS)
Opportunity No.: 1637519-1
Laboratory No.: L-12554
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12554\Revision 1 Juneau, AK, City & Borough of Juneau-Douglas TP, Opp# 1637519, L-12554 Lab Report.docx
Page 4
Filtrate produced from the drainage tests are shown below:
Filtrates
(from left: C-9530 and 857BS)
4. Centrifuge spin-down tests were conducted on the sample conditioned with C-9530 and 857BS.
C-9530 produced a cake dryness of 19 – 22%TS at a dosage of 40.0 active lbs/ton TSS, and
17 – 19%TS at a dosage of 24.8 active lbs/ton TSS with Ashland 857BS.
Detailed centrifuge test results are shown in the test data section
Opportunity No.: 1637519-1
Laboratory No.: L-12554
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12554\Revision 1 Juneau, AK, City & Borough of Juneau-Douglas TP, Opp# 1637519, L-12554 Lab Report.docx
Page 5
Test Data:
A. Sample Analysis
Total Solids (%TS @ 105oC) 0.88
Suspended Solids (%SS @ 105oC) 0.81
Plug Solids (%TS, @ 3000G’s and 5 minutes) 6.1
pH @ 11°C 6.8
Specific Gravity 1.0
Ash Content of Total Solids (% of TS) 19.5
Volatile Solids Content (% of TS) 80.5
Capillary Suction Time (sec) 26.0
Screened Solids:
Description
+30 Mesh Fraction (% of SS) 2.3 Debris, Hair
30 x 50 Mesh Fraction (% of SS) 2.9 Debris, Fiber
50 x100 Mesh Fraction (% of SS) 3.3 Grit, Fine Fiber
100 x 140 Mesh Fraction (% of SS) 2.9 Grit, Fine Fiber
140 x 230 Mesh Fraction (% of SS) 3.5 Biomass
230 x 325 Mesh Fraction (% of SS) 1.8 Biomass
-325 Mesh Fraction (% of SS) 83.4
Sludge Volume Index (SVI ml/g) 124
Settled Solids (1000 ml @ 30 min) 1000
Color Brown
Odor Earthy
Opportunity No.: 1637519-1
Laboratory No.: L-12554
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12554\Revision 1 Juneau, AK, City & Borough of Juneau-Douglas TP, Opp# 1637519, L-12554 Lab Report.docx
Page 6
B. Polymers Tested
Ashland : K148L, K274FLX, 857BS
BASF : 7878FS40, 8868FS, 7557, 8185
Polydyne : C-6237, C-6266, C-9530, C-3232, C-3282, C-3286, C-3295
C. Belt Filter Press Test Results
Test Temperature (°F) Ambient
Tested Polymer C-9530 857BS
Makeup Polymer Dilution (%) 0.5 0.1
Injection Polymer Dilution (%) 0.5 0.1
Neat Polymer Dosage (lbs/ton TS) 64.5 12.9
Active Polymer Dosage (lbs/ton TS) 27.7 12.9
Recommended Belt Type IFC 6093
BFP Type 2.0m SMX®-S8 Quantum
Throughput (lb TS/hr) 365 200
Throughput (GPM) 83 45
Solids Capture (%SS 1%) 90 90
Belt Speed (FPM) 4 4
Belt Tension (PLI) 35 35
Cake Thickness (mm) 7 4
Cake Solids (%TS) 15.9 14.9
Opportunity No.: 1637519-1
Laboratory No.: L-12554
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12554\Revision 1 Juneau, AK, City & Borough of Juneau-Douglas TP, Opp# 1637519, L-12554 Lab Report.docx
Page 7
D. Centrifuge Test Results
Spin
Time
(Minutes)
G Force Type
Of
Test
Polymer
Type
Polymer
Dosage Rate
(active lbs/ton)
Plug
Solids
(%TS)
Anticipated
Cake Solids
(%TS)
5 3000 Glass Tube None -- 6.1
19 – 22
5 3000 Glass Tube C-9530 40.0 7.0
10 3000 Screen C-9530 40.0 19.0
15 3000 Screen C-9530 40.0 20.2
20 3000 Screen C-9530 40.0 21.1
Spin
Time
(Minutes)
G Force Type
Of
Test
Polymer
Type
Polymer
Dosage Rate
(active lbs/ton)
Plug
Solids
(%TS)
Anticipated
Cake Solids
(%TS)
5 3000 Glass Tube None -- 6.1
17 – 19
5 3000 Glass Tube 857BS 24.8 6.3
10 3000 Screen 857BS 24.8 17.5
15 3000 Screen 857BS 24.8 18.1
20 3000 Screen 857BS 24.8 18.4
Opportunity No.: 1637519-1
Laboratory No.: L-12554
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12554\Revision 1 Juneau, AK, City & Borough of Juneau-Douglas TP, Opp# 1637519, L-12554 Lab Report.docx
Page 8
Discussion:
The sludge feed solids content was 0.81%TSS and volatile solids content of 80.5% of TS. The cake
sample from the on-site BFP had a dryness of 14.5%TS. BFP simulation tests conducted on the
sample produced cake drynesses in the range of 14 – 16%TS depending on the type of polymer used.
Emulsion polymers were more effective but estimated dosage rates were high compared to the dry
polymers. Centrifuge dewatering can produce the required cake dryness 20%TS (±1) by using
emulsion polymers. Dry polymers also produced higher cake dryness (17 – 19 %TS) compared to the
current BFP dewatering.
Attached are photographs of the screen analysis and lab sample data sheets for the sample received
for reference and comparison.
The remaining untested sludge will be disposed into the city sewer.
Phani K. Peddi
Process Engineer
PKP/sk
Attach.
Copies of this report have been distributed to the following:
Original +1cc/ Lab
1 cc/ Denis Piché
Sig Hausegger
Opportunity No.: 1637519-1
Laboratory No.: L-12554
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12554\Revision 1 Juneau, AK, City & Borough of Juneau-Douglas TP, Opp# 1637519, L-12554 Lab Report.docx
Page 9
Attachment A – Photographs
Photo #1: +30 Mesh Fraction Photo #2: 30X50 Mesh Fraction
Photo #3: 50X100 Mesh Fraction Photo #4: 100X140 Mesh Fraction
Photo #5: 140X230 Mesh Fraction Photo #6: 230X325 Mesh Fraction
Opportunity No.: 1637519-1
Laboratory No.: L-12554
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12554\Revision 1 Juneau, AK, City & Borough of Juneau-Douglas TP, Opp# 1637519, L-12554 Lab Report.docx
Page 10
Attachment B – Lab Sample Data Sheets
Opportunity No.: 1637519-1
Laboratory No.: L-12554
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12554\Revision 1 Juneau, AK, City & Borough of Juneau-Douglas TP, Opp# 1637519, L-12554 Lab Report.docx
Page 11
Opportunity No.: 1637519-1
Laboratory No.: L-12554
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12554\Revision 1 Juneau, AK, City & Borough of Juneau-Douglas TP, Opp# 1637519, L-12554 Lab Report.docx
Page 12
LAB REPORT
Report No.: L-12555
Opportunity No.: 1637520-1
Application: 2997-0017
Division: 41
Product Home:4417, 4418
Date Report Issued: December 17, 2014
Date Sample Received: December 3, 2014
Author: Phani K. Peddi
Copy: Piché, Hausegger
Customer: Borough of Juneau
Plant name: Mendenhall WWTP
Attention: Ms. Samantha Stoughtenger
Address: 2009 Radcliffe Road
City, State, Zip: Juneau, AK 99801
Phone: (907) 586-0393
E-mail: [email protected]
ANDRITZ Rep.: APSCO LLC
Attention: Mr. Dale McBain
Address: 1120 8th Street
City, State, Zip: Kirkland, WA 98033
Phone: (206) 617-9921
Email: [email protected]
ANDRITZ Separation Inc.
Area Sales Manager: Mr. Denis Piché
Address: 1010 Commercial Blvd. S.
City, State, Zip: Arlington, TX 76001
Phone: (403) 650-4131
Email: [email protected] www.andritz.com
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ.
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12555\Revision 1 Juneau, AK City & Borough of, Mendenhall WWTP, Opp# 1637520-1, L-12555 labreport.docx
Table of contents
Introduction ........................................................................................................................................ 1
Objectives ........................................................................................................................................... 1
Conclusions ..................................................................................................................................... 2-4
Test Data
A. Sample Analysis ..................................................................................................................... 5
B. Polymers Tested ..................................................................................................................... 5
C. Belt Filter Press Test Results ................................................................................................ 6
D. Centrifuge Press Test Results ............................................................................................... 7
Discussion .......................................................................................................................................... 8
Attachments
A. Photographs............................................................................................................................ 9
B. Lab Sample Data Sheets ................................................................................................. 10-12
Opportunity No.: 1637520-1
Laboratory No.: L-12555
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12555\Revision 1 Juneau, AK City & Borough of, Mendenhall WWTP, Opp# 1637520-1, L-12555 labreport.docx
Page 1
ANDRITZ LABORATORY REPORT
COMPANY : City and Borough of Juneau
Juneau, AK
PROJECT : Mendenhall WWTP
SAMPLE TYPE : Waste Activated Sludge (WAS) from Sequence Batch Reactors (SBR)
DATE : December 17, 2014
Introduction:
Five (5) gallons of sludge and cake samples were received in the ANDRITZ laboratory from the City
and Borough of Juneau, AK, on December 3, 2014, for dewatering tests simulating a Belt Filter Press
(BFP) and a Decanter Centrifuge. The sludge sample was collected at the Mendenhall Wastewater
Treatment Plant (MWWTP).
The MWWTP (design flow 3.1 MGD and average flow 2.26 MGD) treats the influent wastewater in
Sequence Batch Reactors (SBR) after coarse screening and grit removal without primary treatment.
Sludge from the SBR’s is dewatered using a BFP (manufacturer and model unknown). The customer
is inquiring into replacing the existing BFP with an ANDRITZ High Performance Decanter Centrifuge to
produce drier cake for drying or incineration.
Objectives:
The specific objectives of these laboratory tests were to:
1. Analyze the sludge and cake sample for physical characteristics.
2. Conduct polymer evaluation tests to select the most effective polymer for centrifuge and BFP
dewatering.
3. Conduct ANDRITZ 2.0m SMX®-S8 Quantum BFP simulation tests and determine the achievable
cake dryness from BFP dewatering.
4. Conduct Centrifuge spin-down tests and determine the anticipated cake dryness from an
ANDRITZ Decanter Centrifuge.
Opportunity No.: 1637520-1
Laboratory No.: L-12555
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12555\Revision 1 Juneau, AK City & Borough of, Mendenhall WWTP, Opp# 1637520-1, L-12555 labreport.docx
Page 2
Conclusions:
The results of laboratory testing indicated that:
1. The sample was brown in color and emitted earthy odors. It had a feed solids content of
0.74%TSS (Total Suspended Solids), the volatiles solids content was 91% of TS (Total Solids)
and, the Capillary Suction Time (CST) was 47.0 seconds. It had a fine particle size distribution
with 79.6% of TSS less than 45 microns. Centrifuge spin-down test conducted on the raw sample
at 3000 G’s for 5 minutes produced a plug solids content of 5.6%TS. The sludge (as received)
and spin-down tubes are shown below:
L-12555 Spin-down Tubes
The cake sample received had a dryness of 14.5%TS. The sample had a very high volatile solids
content compared to typical WAS samples tested in the ANDRITZ laboratory (~80% of TS).
Sludges with high volatile solids are difficult to dewater and require high polymer dosage due to its
high organic solids content (fats, oils, grease etc.)
2. Ashland 857BS was the most effective dry polymer tested on the sludge at active dosage rates of
15±1 and 18±1 lbs/ton TSS for BFP and centrifuge dewatering. BASF 8868FS was the most
effective emulsion polymer tested at 20±1 and 29±1 active lbs/ton TSS for BFP and centrifuge
dewatering. Emulsion polymers were more effective in conditioning the sludge and produced
higher cake dryness compared to the dry polymers tested.
Opportunity No.: 1637520-1
Laboratory No.: L-12555
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12555\Revision 1 Juneau, AK City & Borough of, Mendenhall WWTP, Opp# 1637520-1, L-12555 labreport.docx
Page 3
3. ANDRITZ 2.0m SMX®-S8 Quantum BFP simulation test conducted on the sludge conditioned with
8868FS at 19.1 active lbs/ton TSS produced a cake dryness of 13.5%TS at 380 lbs/hr DS (100
GPM). The cake produced was thin (5 mm) and spread along the belt. Both sticking and blinding
to the cloth were observed.
The cake produced from the BFP simulation test is shown below:
BFP Cake Blinded Filter Cloth
Static Buchner Funnel drainage tests were conducted on the sample conditioned with 8868FS and
857BS. The sample conditioned with 8868FS drained at a higher rate and produced higher
discharge solids (4 – 5%TS) compared to 857BS (2 – 3%TS). The drainage curves are shown
below:
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
0 50 100 150 200 250
Dis
ch
arg
e S
olid
s (
%T
S)
Time (Seconds)
L-12555
8868FS (22.6 active lbs/ton TS)
857BS (15.4 active lbs/ton TS)
Opportunity No.: 1637520-1
Laboratory No.: L-12555
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12555\Revision 1 Juneau, AK City & Borough of, Mendenhall WWTP, Opp# 1637520-1, L-12555 labreport.docx
Page 4
Filtrates produced from the drainage tests are shown below:
Filtrates
(from left: 8868FS and 857BS)
4. Centrifuge dewatering tests conducted on the sample conditioned with 8868FS at 28.6 active
lbs/ton TSS produced a cake dryness of 17 – 19%TS. Ashland 857BS produced a dryness of
15±1 %TS at a dosage of 17.9 active lbs/ton TSS.
Detailed centrifuge test results are shown in the test data section.
Opportunity No.: 1637520-1
Laboratory No.: L-12555
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12555\Revision 1 Juneau, AK City & Borough of, Mendenhall WWTP, Opp# 1637520-1, L-12555 labreport.docx
Page 5
Test Data:
A. Sample Analysis
Total Solids (%TS @ 105oC) 0.78
Suspended Solids (%SS @ 105oC) 0.84
Plug Solids (%TS, @ 3000G’s and 5 minutes) 5.6
pH @ 11°C 6.7
Specific Gravity 1.0
Ash Content of Total Solids (% of TS) 9.0
Volatile Solids Content (% of TS) 91.0
Capillary Suction Time (sec) 47.0
Screened Solids:
Description
+30 Mesh Fraction (% of SS) 1.9 Debris, Hair
30 x 50 Mesh Fraction (% of SS) 4.9 Debris, Fiber
50 x100 Mesh Fraction (% of SS) 3.9 Grit, Fine Fiber
100 x 140 Mesh Fraction (% of SS) 2.5 Grit, Fine Fiber
140 x 230 Mesh Fraction (% of SS) 3.9 Biomass
230 x 325 Mesh Fraction (% of SS) 3.3 Biomass
-325 Mesh Fraction (% of SS) 79.6
Sludge Volume Index (SVI ml/g) 118
Settled Solids (1000 ml @ 30 min) 990
Color Brown
Odor Earthy
B. Polymers Tested
Ashland : K148L, K274FLX, 857BS
BASF : 7878FS40, 8868FS, 7557, 8185
Polydyne : C-6237, C-6266, C-9530, C-3232, C-3282, C-3286, C-3295
Opportunity No.: 1637520-1
Laboratory No.: L-12555
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12555\Revision 1 Juneau, AK City & Borough of, Mendenhall WWTP, Opp# 1637520-1, L-12555 labreport.docx
Page 6
C. Belt Filter Press Test Results
Test Temperature Ambient
Recommended Polymer 8868FS
Makeup Polymer Dilution (%) 0.5
Injection Polymer Dilution (%) 0.5
Neat Polymer Dosage (lbs/ton TS) 47.7
Active Polymer Dosage (lbs/ton TS) 19.1
Recommended Belt Type IFC 6093
BFP Type 2.0m SMX®-S8 Quantum
Throughput (lbs TS/hr) 380
Throughput (GPM) 100
Solids Capture (% SS 1%) 90
Belt Speed (FPM) 7
Belt Tension (PLI) 35
Cake Thickness (mm) 5
Cake Solids (% TS) 13.5
Opportunity No.: 1637520-1
Laboratory No.: L-12555
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12555\Revision 1 Juneau, AK City & Borough of, Mendenhall WWTP, Opp# 1637520-1, L-12555 labreport.docx
Page 7
D. Centrifuge Test Results
Spin
Time
(Minutes)
G Force
Type
Of
Test
Polymer
Type
Polymer
Dosage Rate
(active lbs/ton)
Plug
Solids
(%TS)
Anticipated
Cake Solids
(%TS)
5 3000 Glass Tube None -- 5.6
17 – 19
5 3000 Glass Tube 8868FS 28.6 6.7
10 3000 Screen 8868FS 28.6 18.2
15 3000 Screen 8868FS 28.6 18.3
20 3000 Screen 8868FS 28.6 18.7
Spin
Time
(Minutes)
G Force
Type
Of
Test
Polymer
Type
Polymer
Dosage Rate
(active lbs/ton)
Plug
Solids
(%TS)
Anticipated
Cake Solids
(%TS)
5 3000 Glass Tube None -- 5.6
14 – 16
5 3000 Glass Tube 857BS 17.9 6.3
10 3000 Screen 857BS 17.9 14.0
15 3000 Screen 857BS 17.9 14.3
20 3000 Screen 857BS 17.9 14.6
Opportunity No.: 1637520-1
Laboratory No.: L-12555
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12555\Revision 1 Juneau, AK City & Borough of, Mendenhall WWTP, Opp# 1637520-1, L-12555 labreport.docx
Page 8
Discussion:
The sample contained 0.78%TS and 0.74%TSS and had a very high volatile solids content of 91.0%
of TS. The BFP simulation test conducted on the sludge sample produced lower cake dryness
(13.5%TS) compared to the field dryness (14.5%TS). This may be due to variation in chemical
conditioning or throughput considerations.
A cake dryness of 17-19%TS can be anticipated from an ANDRITZ Decanter Centrifuge using
emulsion polymers. Dry polymers for centrifuge dewatering can also improve the achievable cake
dryness from the existing BFP dewatering but, the impact is lower compared to emulsion polymers.
Attached are photographs of the screen analysis and lab sample data sheets for the sample received
for reference and comparison.
The remaining untested sludge will be disposed into the city sewer.
Phani K. Peddi
Process Engineer
PKP/sk
Attach.
Copies of this report have been distributed to the following:
Original +1cc/ Lab
1 cc/ Denis Piché
Sig Hausegger
Opportunity No.: 1637520-1
Laboratory No.: L-12555
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12555\Revision 1 Juneau, AK City & Borough of, Mendenhall WWTP, Opp# 1637520-1, L-12555 labreport.docx
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Attachment A – Photographs
Photo #1: +30 Mesh Fraction Photo #2: 30X50 Mesh Fraction
Photo #3: 50X100 Mesh Fraction Photo #4: 100X140 Mesh Fraction
Photo #5: 140X230 Mesh Fraction Photo #6: 230X325 Mesh Fraction
Opportunity No.: 1637520-1
Laboratory No.: L-12555
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12555\Revision 1 Juneau, AK City & Borough of, Mendenhall WWTP, Opp# 1637520-1, L-12555 labreport.docx
Page 10
Attachment B – Lab Sample Data sheets
Opportunity No.: 1637520-1
Laboratory No.: L-12555
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12555\Revision 1 Juneau, AK City & Borough of, Mendenhall WWTP, Opp# 1637520-1, L-12555 labreport.docx
Page 11
Opportunity No.: 1637520-1
Laboratory No.: L-12555
Confidential document. All rights reserved. No duplication or disclosure to third parties permitted without the written consent of ANDRITZ AG. S:\Process\PROJECTS\J\Juneau Alaska Borough of\L-12555\Revision 1 Juneau, AK City & Borough of, Mendenhall WWTP, Opp# 1637520-1, L-12555 labreport.docx
Page 12