HomeMy WebLinkAbout15- Revised Bozeman WRF Polymer Vendor Prequal (3) (2)_A
Digester Sludge Dewatering Trials
Polymer Supplier Selection
Notification of Interest and Testing Protocol
Polymer Testing Protocol
Polymer Performance Evaluation Criteria
City of Bozeman, Montana
Water Reclamation Facility
2245 Springhill Rd., Bozeman, Montana 59771
Phone: 406-582-2928
Email: hbartle@bozeman.net
Prepared by:
HDR Engineering, Inc.
1715 S. Reserve St., Suite C
Missoula, MT 59801
(406) 532-2200
Polymer Supplier Selection 1
Invitation to Bid
The following are the estimated deadlines for polymer manufacturer selection:
Distribution of Solicitation Notice – April 5, 2015
Manufacturer deadline to submit Notification of Interest –April 16, 2015
On-site bench-scale test polymer product(s) –April 20 thru May 1, 2015
On-site Full-Scale Performance Testing –May 11, 2015 thru May 22, 2015
Manufacturer deadline to submit formal bids – June 16, 2015
Polymer Testing Protocol
Polymer equipment suppliers and/or Polymer manufacturers will be invited by the City of Bozeman, Montana to
participate in prequalification polymer trials. Dewatering trials will be conducted at the Bozeman Water
Reclamation Facility (WRF). Prequalification trials shall consist of full-scale performance tests. Based on the
results of the trials, manufacturers whose polymer has met the performance criteria for this facility will be asked
to submit separate sealed bids presenting their cost to supply the polymer equipment and/or polymer(s) for the
facility. Bids from manufacturers for polymers that have not undergone the full-scale performance tests will not
be accepted or reviewed.
The new City of Bozeman WRF has a location dedicated for blending and feed of polymer from chemical totes.
The polymer feed equipment is a Fluid Dynamics Model #N0203-F110231, modified to now use Blue-White
peristaltic emulsion pumping units. This trial will include performance testing of the polymers dewatering a mix
of anaerobically digested primary and secondary biosolids (sludges) for one (1) Huber Screw Press dewatering
unit. The result of these tests will enable Vendors to be eligible to bid for supply of a polymer suitable for the
Huber Screw Press for one year.
Initial Manufacturer Qualification
Manufacturers interested in participating in the Polymer Trials must submit, at a minimum, the following items
in a Notification of Interest:
1. Supplier must be able to provide a minimum of twelve totes of the selected polymer to be delivered
within 30 days of date of order.
2. The manufacturer must provide current listing of ISO certifications such as 9001 and 14001 and
other relative certifications such as designation from the American Chemistry Council as a
Responsible Care® industry to demonstrate its dedication to quality control and environmental
stewardship.
Polymer Supplier Selection 2
3. The performance testing shall be conducted under the direction a designated Technical
Representative (TR) provided by the manufacturer at no cost to the City of Bozeman. Manufacturer
shall list the name, address and contact information for the proposed TR. Upon award of contract,
the designated TR must be responsible to quickly address the needs of the City of Bozeman
regarding polymer supply and quality, and provide polymer use technical assistance.
4. Manufacturers shall include a list of at least three (3) municipal wastewater customers, with current
contact information, that are currently using or have used the proposed polymer product(s) within
the last three (3) years. This information will be provided to the City of Bozeman and its
representative using the form provided in Exhibit 1.
5. Qualified manufacturers while on plant sites with polymers shall maintain product information for
all polymers that will be considered for the full-scale tests. At a minimum, product information shall
include polymer name, product number, a current material safety data sheet (MSDS) and product
specification indicating % active polymer content.
Notification of Interest packages must be received by the City of Bozeman, Montana by the following
representative:
Herb Bartle
City of Bozeman Water Reclamation Facility
2245 Springhill Rd., Bozeman, Montana 59771
Phone: 406-582-2928
Email: hbartle@bozeman.net
Based on results of the review of the information provided with the Notification of Interest, manufacturers that
meet the qualifying criteria will be selected to participate in the polymer equipment and polymer trials program
as outlined in the schedule in the Polymer Testing Protocol section.
Polymer Specifications
The polymer equipment and polymer to be tested and bid shall be suitable as a conditioner for screw press
dewatering of anaerobically digested (mixed) primary and secondary sludge biosolids from the Bozeman WRF.
Polymers to be tested shall be high molecular weight cationic or anionic emulsion type (cationic expected)
compatible with the City’s existing polymer mixing and feed equipment noted above. The polymer may be used
for thickening of waste activated sludge via a rotary screen thickener.
Polymer must maintain at least ninety percent (90%) effective strength for a minimum of six (6) months after
delivery when stored in a covered, heated, and ventilated area (60°F to 80°F).
Polymer Testing Procedure
The prequalification polymer testing consists of full-scale performance testing. To prepare for the
polymer testing, site visits by manufacturers to the WRF facilities are by appointment only coordinated
through the key facility representative. Key operator contacts will be provided upon selection to
Polymer Supplier Selection 3
participate. Unauthorized/unscheduled facility visits at any time by the manufacturer or its
representatives are grounds for removal from the polymer trials program.
Bench-scale Testing
Manufacturers will be invited to bench-scale test their polymer product(s) to determine which product provides
the best potential thickening and cost effective results. Bench-scale testing will be conducted by appointment
only by the manufacturers TR. All testing will take place at the water Reclamation Facility (WRF) laboratory
located at 2245 Springhill Road, Bozeman, Montana. Representative samples of anaerobically digested sludge
for dewatering testing will be provided and delivered by City operations staff. All manufacturers who are
selected to participate will be given an appointment to perform tests to screen their polymers. The
appointment will be arranged at a date/time mutually agreeable upon with the plant staff and the TRs. TRs may
begin jar or other tests at 8:00 AM and shall complete all work by 3:00 PM, on the same day.
Full-scale Performance Testing
Full-scale testing will be performed by City of Bozeman operations staff with technical input from the TRs. A
meeting will be held individually with each manufacturer before initiation of the full-scale testing to review the
goals, conditions, and responsibilities for the testing. The full-scale testing program will be conducted at the
Bozeman WRF Digester Complex, scheduled from May 11 thru the 22th, 2015. A detailed full-scale testing
schedule will be developed to coordinate plant operations, TR availability, polymer supply, etc.
Prior to and during testing, the polymer supplier shall ensure that equipment to be used in the test at the plant
will not adversely affect test results. The TR is responsible for verifying that test conditions and equipment are
acceptable.
All pumps, tanks, mixers, etc. required for the full-scale test, in addition to what is available with the City’s
existing blending and feed equipment, shall be provided and set up by the polymer supplier. Each TR will be
responsible for performing any preliminary tests needed to determine the initial polymer dosage required to
minimize the effect on subsequent operations and to insure that an adequate supply of polymer is provided for
the duration of testing. Polymer supply for up to 24 hours (two 8 to 10 hr days) will be allowed for each polymer
proposed. The specific test duration (within the limits outlined above) and polymer quantities will be
determined by the polymer supplier. The polymer for performance testing must be delivered to the respective
facility at no cost to the City of Bozeman. Polymer shall be delivered to the plant a minimum of 24-hours prior to
the scheduled testing date.
A daily trial schedule will be established prior to the testing date. On the day of the testing, each TR will be given
an ample amount of time to make adjustments regarding polymer makeup and feed conditions (polymer mix
conc., initial feed rates, etc.) before their official trial period begins. TRs will be allowed to sample the feed
sludge at a single representative point of the process as designated by the Treatment Plant Superintendent or
Operations Supervisor.
The following conditions will apply to the full-scale performance test:
1. Full-scale testing will be allowed by appointment only.
2. A meeting will be held individually with each manufacturer before initiation of full-scale testing to review
the goals, conditions, and responsibilities for the testing
Polymer Supplier Selection 4
3. A maximum of two (2) people from the polymer manufacturer will be allowed on-site during the test.
4. A minimum of eight (8) hours, and a maximum of ten (10) hours per day of testing. Under no
circumstances shall tests be continued past 5:00 PM.
5. Minimum of five (5) polymer dosages with at least 60 minutes of run time per dosage.
6. Maximum of eight (8) acceptable polymer dosages with at least 60 minutes of run time per dosage.
7. Five (5) defined doses (minimum requirements) to be run as close as possible to:
a. Lowest possible dosage (lbs/dry ton) to achieve performance goals, the next higher integer
dosage (lbs/dry ton), and three (3) more dosages in 2 to 5 lbs/dry ton increments (total of 5
dosages);
b. Each of the defined doses will be run twice for a maximum of ten (10) sample sets, and a
maximum of sixteen (16) sample sets. (2 Days)
8. Average of the five (5) best acceptable sample sets will be used for evaluation.
9. Plant personnel will collect and composite samples.
a. The first sample shall be collected 60 minutes after dewatering device startup;
b. Thereafter samples shall be collected every 60 minutes.
10. Plant personnel will analyze samples and split samples may be analyzed by a state of Montana certified
laboratory, at the manufacturer’s request and expense.
11. The manufacturer, at their cost, shall remove all and lawfully dispose all unused product and containers
at the conclusion of testing. At the City's request, the manufacturer shall turn over any remaining
unused blended polymer to the City at no cost.
In the event of equipment breakdown or malfunction, the City of Bozeman may elect (at their discretion) to
reschedule a full-scale performance test. In this event, rescheduled date(s) shall be mutually agreed upon by the
City of Bozeman and the manufacturer(s).
The City of Bozeman reserves the right to terminate testing immediately at their discretion if they determine
that a polymer product does not meet the performance requirements or that the polymer being utilized is
detrimental to equipment operation or performance.
The manufacturer shall monitor the testing to verify that all polymers and other related variables are within
normal operating parameters. If the TR has any concerns these should be communicated to the Treatment Plant
Superintendent or individual designated by the manager to supervise the test not later than two (2) days after
completion of testing. TRs cannot directly request operators to make process changes other than indicated
herein. Polymers that require the equipment to be run outside normal operating variables will be removed from
consideration.
Upon completion of the full-scale trials, a copy of the performance data for the particular polymer supplied by
and tested for a manufacturer will be supplied to that manufacturer’s TR for use in developing bid documents.
Polymer Supplier Selection 5
Expected Dewatering Performance:
Parameter
Value
Units
Dry Tons per Year 2,190 Bone Dry Standard Tons/yr
Dry Tons per Day 6.0 (output) Bone Dry Standard Ton/day
Feed Gallons per Day 63,436 (at 2.5% TS inlet) gpd
Feed Gallons per Minute 44.4 (at 2.5% TS inlet) gpm
Average Inlet Consistency
Percent Total Solids
1-4% % TS
Minimum Outlet Consistency
Percent Total Solids
18% % TS
Operating Days per Year 365 Days
Operating Days per Week 7 Days
Operating Hours per Day 24 Hours
Polymer Performance Evaluation Criteria
The following equations provide evaluation criteria that will be used during the trials and with full-scale
performance test data and submitted bids to identify the most cost effective product:
Polymer Feed Rate (Active), SP, (lb/d)
Sp = 8.34 x QP x CP x (A/100)
Where:
QP = Polymer feed rate (gpm)
CP = Polymer feed concentration (mg/L)
A = Neat polymer activity (%)
Polymer Feed Concentration (Neat), CP, (mg/L)
CP = 120,090 x M / (VP+ VW)
Where:
M =Mass of neat polymer per test batch (lbs)
VP =Volume of polymer per test batch (gallon)
VW = Volume of water per test batch (gallon)
Polymer Usage, PU, (lb active polymer/dry ton)
PU = SP / (SP/2,000)
Solids Recovery, R (%)
Where:
R =100 x C x (D-S)/(D x (C-S))
C =Screw Press Cake solids (%)
D=Dig #3 Sludge solids (%)
S =Screwate solids (%)
Polymer Supplier Selection 6
Example Polymer Performance Calculation per Qualified Polymer
Cake solids Production (avg): 10 dry ton/day (from polymer trials)
Polymer Usage (avg): 20 lb/dry ton (from polymer trials)
Polymer cost: $1.00/lb (from polymer bid)
% recovery (avg): 98% (from polymer trials)
Polymer cost per day thickening operations =
5 dt/d x 20 lb/dt x $1.00/lb / 0.98 recovery = $102.04/day
Polymer Supplier Selection 7
Exhibit 1
References
(Must be completed by manufacturer and included with Notification of Interest)
of
- – Polymer Trials
Vendors shall provide references on this form. References must be of organizations having similar facilities as
- .
1. Name or Utility -
a. Contact -
b. Title -
c. Mailing Address -
d. Phone -
e. Email -
2. Name of Utility -
a. Contact -
b. Title -
c. Mailing Address -
d. Phone -
e. Email -
3. Name of Utility -
a. Contact -
b. Title -
c. Mailing Address -
d. Phone -
e. Email -