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HomeMy WebLinkAbout15- CRITERIA for the Bozeman WRF Polymer Vendor 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 April 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 -