Erie County Water Authority

Transcription

1 Erie Cunty Water Authrity Cnslidatin & Simplificatin: Van De Water Plant Residuals Treatment NYSAWWA Edwin C. Tifft Jr. Water Supply Sympsium Brian Sibiga & Julie Le September 19, 2018

2 Prject Backgrund & Existing System Integrated Capital and Energy Planning Sludge Pumping System Sludge Thickening System Sludge Dewatering System Sludge Dispsal Cntents Prpsed System

3 PROJECT BACKGROUND Erie Cunty Water Authrity (ECWA) Created in 1949 and in Operatin Since 1953 Serves mre than 540,000 Peple ECWA Van De Water Treatment Plant (VDWTP) Lcated in Tnawanda, NY 49.5 MGD Cnventinal WTP Water Treatment Facilities Residuals Prcessing Facilities In Operatin Since 1980 Surce Water: Niagara River

4 EXISTING SYSTEM Sludge Pumping Sludge Thickening Sludge Dewatering Sludge Dispsal

5 ICE INTEGRATED CAPITAL & ENERGY IMPROVEMENTS A prgram that helps create a wrld where capital imprvements can pay fr themselves freeing municipalities frm having t impse mre burdens n ratepayers r rely n grant funding.

6 ICE APPROACH PLANNING PHASE PROJECT IMPROVEMENTS IMPLEMENTATION RESULTS

7 ICE APPROACH Planning Phase Site Visits & Meetings Data Cllectin Sludge Sample Cllectin by Manufacturers NYSERDA Flextech Data Analysis Alternatives Cnsidered Matrix Scring System Recmmendatins

8 MATRIX SCORING SYSTEM Scale Pr Gd Criteria Weight Capital Cst 25% Cnstructin cst fr the prpsed alternative Annual Operating & Maintenance Cst 20% Cst t perate and maintain the prpsed alternative Perfrmance, Reliability and Maintainability 20% A relative measure f an alternative's perfrmance and reliability, the ease f maintenance, accessibility, and crew requirements needed t perfrm maintenance Ease f Operatin 25% A relative measurement f an alternative's peratinal simplicity and resurces required fr peratin. Cnstructability 5% A relative measurement f the alternative's difficulty in cnstructing the facility System Size and Site Impacts 5% A relative measurement f the alternative's ftprints and number f cmpnents TOTAL 100%

9 SLUDGE PUMPING SYSTEM INFLUENT OF THE SLUDGE PLANT (3) Wastewater Pumps Rebuilt in , VFD drives (2) Cagulatin/Sedimentatin Basin Blwdwn Pumps Installed in 1971, Cnstant-speed drive

10 SLUDGE PUMPING SYSTEM RECOMMENDATION: Replace tw (2) existing Cag./Sed. Basin Blwdwn Pumps with tw (2) new VFD pumps Annual Savings: Electrical Energy Savings: 1,053 kwh Electrical Savings: $250 O&M Savings: $2,800 Capital Cst: $67,500 Simple Payback: 22.0 years Current Age: 37 years

11 SLUDGE THICKENING SYSTEM EXISTING SYSTEM: Cmpnents: Distributin bx Clarifier/Thickener #2 Plymer Parameters: 2 3% slids 12-HP system Clarifier/Thickener #2 Plymer Feed System

12 THICKENER/CLARIFIER REHAB. ROTARY DRUM THICKENER GRAVITY BELT THICKENER 2 t 3% slids 12-HP System Capital Cst: $140,000 O&M Cst: $1,000 Chemical Cst: $7,000 Energy Cst: $1,000 Matrix Scre: 4.25/5 5% Slids 55-HP System Capital Cst: $690,000 O&M Cst: $2,500 Chemical Cst: $98,500 Energy Cst: $3,200 Matrix Scre: 3.4/5 6% Slids 45-HP System Capital Cst: $720,000 O&M Cst: $2,500 Chemical Cst: $50,000 Energy Cst: $2,800 Matrix Scre: 2.95/5

13 RECOMMENDED OPTION THICKENER/CLARIFIER REHAB. ROTARY DRUM THICKENER GRAVITY BELT THICKENER 2 t 3% slids 12-HP System Capital Cst: $140,000 O&M Cst: $1,000 Chemical Cst: $7,000 Energy Cst: $1,000 Matrix Scre: 4.25/5 5% Slids 55-HP System Capital Cst: $690,000 O&M Cst: $2,500 Chemical Cst: $98,500 Energy Cst: $3,200 Matrix Scre: 3.4/5 6% Slids 45-HP System Capital Cst: $720,000 O&M Cst: $2,500 Chemical Cst: $50,000 Energy Cst: $2,800 Matrix Scre: 2.95/5

14 SLUDGE DEWATERING SYSTEM Liquid Lime Feed Plate and Frame Press EXISTING SYSTEM: Cmpnents: (2) Thickened sludge transfer pumps Reactin mixer tank Sludge decant tank (2) Cnditined sludge pumps Lime Cnditined sludge retentin tank (4) Filter feed pumps Plate and Frame press (2) Filtrate pumps CO2 Neutralizatin tank (2) Air Cmpressrs Cnveyr Parameters: 30 33% slids 210-HP system Filtrate Pumps Sludge Decant Tank

15 PLATE AND FRAME PRESS CENTRIFUGE BELT FILTER PRESS 30 33% slids with lime 210-HP System Capital Cst: $1,490,000 O&M Cst: $36,000 Chemical Cst: $10,000 Energy Cst: $12,500 Hauling Cst: $57, % slids withut lime 102-HP System Capital Cst: $1,156,000 O&M Cst: $5,000 Chemical Cst: $27,000 Energy Cst: $7,000 Hauling Cst: $78,000 Payback: 35.2 years Matrix Scre: 2.85/ % slids withut lime 45-HP System Capital Cst: $1,037,000 O&M Cst: $4,000 Chemical Cst: $13,500 Energy Cst: $2,000 Hauling Cst: $59,500 Payback: 14.6 years Matrix Scre: 3.7/5

16 RECOMMENDED OPTION PLATE AND FRAME PRESS CENTRIFUGE BELT FILTER PRESS 30 33% slids with lime 210-HP System Capital Cst: $1,490,000 O&M Cst: $36,000 Chemical Cst: $10,000 Energy Cst: $12,500 Hauling Cst: $57, % slids withut lime 102-HP System Capital Cst: $1,156,000 O&M Cst: $5,000 Chemical Cst: $27,000 Energy Cst: $7,000 Hauling Cst: $78,000 Payback: 35.2 years Matrix Scre: 2.85/ % slids withut lime 45-HP System Capital Cst: $1,037,000 O&M Cst: $4,000 Chemical Cst: $13,500 Energy Cst: $2,000 Hauling Cst: $59,500 Payback: 14.6 years Matrix Scre: 3.7/5

17 SLUDGE DISPOSAL Existing cnditins: One (1) 20-CY dumpster 9 tns/dumpster Landfill with Larger Dumpster Reduce annual hauling trips The hauling cntractr ffers 30- and 40-CY dumpsters Weight limit: 10 tns Landfill with Additinal Dumpster Mitigate delays Add mre flexibility t scheduling Maintain cntinuus peratin

18 SLUDGE DISPOSAL Landfill with Sludge dryer Dwnstream f the dewatering system Achieve up t 97% slids Significantly reduce landfill and hauling csts Csts: Capital cst: $1,380,000 Utilities: $16,000/year O&M Cst: $2,000 Savings: Hauling and Landfill: $20,500/year, cmpared t $56,400 Payback: 64 years Cmbined with BFP: 24.2 years

19 EXISTING SCHEMATICS PROPOSED SCHEMATICS 23 pieces f equipment, 222-HP System 7 pieces f equipment, 57-HP System

20 QUESTIONS & THANK YOU. Fr mre infrmatin please cntact: Brian Sibiga, PE Julie Le, EIT