A Sustainable Landfill Water Treatment Facility: The Pinellas Co. BWA Experience

Transcription

1 A Sustainable Landfill Water Treatment Facility: The Pinellas Co. BWA Experience SWANA Summer FL Conference Edwin Guasp, Ph.D., Program Manager

2 Presentation Goals: Landfill introduction and description Pond A & WTF Challenges Addressing Challenges Summary Questions & answers 2

3 The Bridgeway Acres (BWA) Landfill: Located in Pinellas Co., Florida (central west coast) Population: 930,000 Total sq. mi.: (279.9 sq. mi. land, 53.9 % water) Most densely populated in Florida 3,300 people / sq. mi. 24 cities 1/3 unincorporated Solid waste generation: million tons /yr. 3

4 BWA (an urban landfill) has 3 Sections: 1. Landfill & Solid Waste Operations 730 Acres w/ Class I and Class III landfills Scale house, citizen hand-unload facility, composting/mulching, franchise collection, & emergency debris management Tipping fee: $37.50 per ton Close water system: storm & gradient ground water systems within slurry wall (below grade bentonite wall: restricts groundwater outflow) Pond A (325 million gal. leachate & storm water retention pond). 4

5 BWA Sections (an urban landfill): 2. Recycling & Systems Management 3. Waste to Energy (WTE) Facility (1983) Receives 3 4 thousand tons waste /day About 88% waste is made into electricity Reducing SW volume by 90% About 12 % is recycled or disposed by other means Export MW/hr (powering 35-40,000 homes) 5

6 Aerial View Solid Waste Facility: 6

7 Pond A & WTF Challenges Pond A Water Volume Max. 325 million gal. (after dredging) During rainy season not enough storage capacity Forced to discharge into Mainlands Canal (discharges into Tampa Bay) Leachate WQ Run off & groundwater from ash degrades WQ TDS, conductivity, ph, eutrophication, nitrification, trace metals; etc. Violations upon discharge permit (NPDES permit) Unable to fully use pond water in WTE plant, must mixed w/ reclaimed water 7

8 Pond A Pictures: 8

9 Pond A & WTF Challenges DEP Consent Order: (Actions) NPDES permit violations resulted on Consent Order by DEP (4/2010) Completed a water management assessment and plan Dredged Pond A (400,000 yd 3 sediment & increased vol. capacity 80 MG) Completed new water gradient control system Installed lining & weir on canal next to WTE (enhance discharge into waterways) Build an IWTF (3.1 MGD) Opened on 4/1/2013 Control discharges Improve Pond A WQ 9

10 BWA Industrial Water Treatment Facility (3.1 MGD max.) 10

11 BWA Industrial Water Treatment Facility Process Alum, Bleach, & Caustic; ph Control Blended Water (30% MF w/ 70% RO permeate). Bleach & Caustic added; disinfection & ph Control Bleach (Na Hypochlorite) Sludge Tank Sewer MF Skids RO Feed Tank 0.5 MG Pond A GCS Cooling 60K gal. Towers Pond A Raw Water IPS Influent Pump Station Clarifier Tank Coagulation Flocculation Sedimentation MF Tank Na Bi-sulfite Biocide RO Permeate Line WTE Service Water Anti-Scalant RO Skids 1 & 2 Conc. to Pinellas Park & SC

12 Chemical Feed Systems: (10 Different Chem.) 1) Bleach (Na Hypochlorite) (8-12 IPS): Oxidation, disinfection, also used to clean MF & preserve MF membranes (5%) 2) Alum (Aluminum Sulfite) (200 ppm): Coagulant & ph control into clarifier 3) Caustic (Sodium Hydroxide) (5 ppm): ph control into clarifier & finish water tank, also used to clean MF 4) Sodium Bisulfite (2-3 ppm): Remove chlorine before RO System 5) Biocide (10-15 ppm): Kills microorganisms in RO System 6) Scale Inhibitor (2.5 ppm): Controls inorganic deposition in RO System 7) High ph detergent (5%): Clean RO system (biological fowling) 8) Low ph detergents (5%): Clean RO system (inorganic fowling) 9) Citric Acid (5%): Cleaning of MF System 10) Sodium Metabisulfite (5%): Preservation of RO membrane elements 12

13 Pond A Water Treatment Performance (WQ 30% blend & one year operation) Conductivity (us/cm) TDS (mg/l) T. Hardness (ppm) Turbidity (NTU) Alkalinity (ppm) TOC (ppm) Calcium (ppm) Sulfate (ppm) ph Pond A Pre-Treatment RO < < < Blended Fin. Water % Change (Pond to Fin. Water) Schedule NR NR < NR < 165 NR < 10 13

14 Pond A & IWTF Challenges Pond A leachate WQ seasonal (even weekly) changes Design & Operation Deficient pilot study during pre-design stage Weak assessment of Pond A WQ Several construction delays and design changes Hiring a team of operator w/ RO & MF experience Lack of knowledge on: Leadership / Team building Strategic Planning Sustainability 14

15 Addressing Challenges Pond A Seasonal Changes Created a WQ baseline (weekly and monthly WQ data) Change treatment set points according to source WQ changes Learn and adapt Design & Operational Challenges Weekly meetings dealing w/ design changes / improvements Input from other RO treatment facilities Early staff hiring (3 months before construction completion) Operator s training during construction Come up with financially feasible CIPs Open to trial and error learning 15

16 Addressing Challenges Leadership & Team Building (6 operators & 3 maintenance support) Learn from each other (the good, bad, & ugly) Regular Meetings & have fun (laugh) Listen, Motivate, & inspire Show concern & understanding for team members Avoid command & control behaviors Develop a friendly work schedule Practice leadership qualities Respect one another Result: High Performance Team 16

17 Realize you cannot please everybody! 17

18 Addressing Challenges Develop a Strategic Business Plan (3 months) Weekly team meetings developing SBP (use of SWOT/PEST): Vision Mission ID customers & stakeholders ID products and services ID team values (respect, communication, safety, efficiency, environmental stewardship) Develop operational Goals or Objectives / Initiatives Several strategies / actions / tactics to accomplish goals Develop datelines and KPM for all strategies Assign responsibilities 18

19 Addressing Challenges IWTF Strategic Business Plan Includes: Three Goals (initiatives) Run and operate the IWTF from a sustainable management business approach Meet water supply and other needs for all our stakeholders (e.g., WTE Facility, other BWA landfill production teams, SCB Wastewater Plant, & suppliers/vendors) Control the level and enhance the WQ of Pond A Develop KPMs (examples) Monthly chemical cost ($) / MG treated water, Annual No. total trainings hrs / employee, Cost Reactive Maintenance Ratio = $ Unplanned Maint. Hrs. / Total Cost Maint. Hrs. Pond A level by April (down to 7.4 feet from 16 ft. or -2.0 feet) 19

20 Addressing Challenges Becoming a Sustainable Operation (what does it mean?) Different Frameworks: (The Balancing Act of the 3 Ps for sake of future generations) P = People / Social Benefits & Equity The quest for sustainability P = Profits / Economic (cost) Efficiency & Vitality P = Planet / Environmental Stewardship 20

21 Addressing Challenges Education & Training on Sustainable Operation Think Globally While Acting Efficiently & Neighborly Becoming: 1. Financially (cost) efficient 2. Stewards of the environment 3. Caring for our people (employees & stakeholders) 21

22 Addressing Challenges Becoming: Financially (cost) efficient Public entity Optimizing operational costs OT pay control & work schedule (a team effort) Energy usage / contemplate renewable energy sources (e.g. solar) Running 83% efficiency vs % Chemical usage; changing chemical feed set points according to WQ Use information / data analysis for optimization, CIP projects, etc. 22

23 Addressing Challenges Becoming: Financially (cost) efficient Commitment to strategies (examples) ID & optimize operational systems costs Develop an asset management program Commitment to financial KPMs (examples) Operational cost ($) / MG treated water (Avg. $2700 /MG prod.) Monthly chemical cost ($) / MG treated water (Avg. $1200 / MG prod.) Monthly KWh electricity cost ($) / MG Treated and MG Fin. Product 23

24 Addressing Challenges Becoming: Stewards of the Environment Maximize Pond A (leachate) water usage. Why? World Water Supply Crisis: (Oceans have 97.48% of planets water) Fresh water is 2.52% (Ice caps, surface, & ground water) 69.56% is frozen 30.06% groundwater 0.38% is surface water 7.1 billion people in Planet Limited available water supply In the USA: 47% Groundwater 53% Surface water State of Florida issues WQ: salinity, N, P High demand 24

25 Addressing Challenges Becoming: Stewards of the Environment Commitment to Environmental Strategies (examples) Enhance Pond A WQ Become energy efficient (potential use of renewable energy) Zero discharges from Pond A Support landfill wildlife ecosystems Commitment to KPMs (examples) Pond A level by April (below 7.4 feet or -2.0 feet) Pond A (MG) discharged offsite, MG/year (Goal = 0 MG/yr.) Meet Pond A NPDES permit WQ requirements 25

26 Addressing Challenges Becoming: Stewards of the Environment Support ecosystems (alligators, coyotes, turtles, migratory birds) Migratory birds ecosystems (Audubon ID 92 species of birds) Support landfill wetlands (25,000 gal / week during dry season) 26

27 Addressing Challenges Becoming: Stewards of the Environment Landfill ecologically: 27

28 Addressing Challenges Becoming: Caring for our staff & stakeholders Commitment to Strategies (examples) Well trained operators (leadership, SBP, sustainability) Operational licenses are encouraged Stakeholders satisfaction survey (staff & customers) Safe work environment Commitment to leadership / open door management style Develop a Team Charter Team environment / collective & participatory decision making (e.g., hiring) Getting public to know what we do best (using tours) Results: ownership, proud staff, respect, positive work environment / HP Commitment to stakeholders KPMs (examples) Number of hours training / employee (Min. 20 hr / yr) No. accidents / employee Stakeholders satisfaction survey (Goal: Rating out of 25) 28

29 SUMMARY WTF exceeding treatment performance goals Keys to success: Learn from mistakes Gather & analyze data Well trained operators (balanced training) Practice leadership and care for staff Building a high performance team Design & implement a team supported SBP Stick to goals, strategies, & KPMs Ensure team takes ownership of operation Develop a sustainable (business approach) operation Balancing the three Ps of sustainability Always look for improvements Keeping ongoing communication w/ staff and stakeholders 29

30 Questions? 30