Eco-efficient Solids Separation Using Salsnes Filter Technology. Jonathan Leech Trojan Technologies Nov 2013

Transcription

1 Eco-efficient Solids Separation Using Salsnes Filter Technology Jonathan Leech Trojan Technologies Nov 2013

2 Outline Process Description Technology Overview Primary Filtration Applications Full-scale application: Enderby, British Columbia, Canada Summary

3 Salsnes range of benefit today

4 Salsnes range of benefit today

5 FILTRATION IMPACT OF TIME Screening HRT Salsnes HRT

6 LET THE SOLIDS DO THE JOB Influent TSS form a filter mat on the mesh Filter mat itself enables high TSS and BOD removal Inlet Thickening Dewatering Outlet

7 PRODUCT OVERVIEW Enclosed Units Open Units Model SF:1000 Models SF:2000 SF:4000 SF:6000 Models SFK:200 SFK:400 SFK:600

8 BENEFITS OF SALSNES MOVING BELT FILTRATION Compact, modular design Footprint 1/10 th of traditional primary treatment High performance (>50% SS, >30% BOD) Sludge dewatering reduces disposal costs Enables waste to energy conversion Reduces environmental footprint

9 DIFFERENT TCO ANALYSIS - EQUAL TREND Per: Norwegian State Pollution Control Agency

10 USE OF SALSNES FILTER IN WWTP DESIGN Stormwater offload and treatment In the sewer network By the STP

11 MUNICIPAL APPLICATIONS Primary treatment for new plants Primary sludge thickening Primary sludge dewatering Stormwater and CSO treatment Expanding primary or secondary capacity

12 TORREVIEJA Spain 15.9 MGD (2500 m 3 /hr) Cedar Grove, BC Primary WWTP, ocean discharge Wastewater Reuse - TrojanUVFit TM SF:1000 Filtermesh Bar Screen Inlet Air Compressor Sludge

13 Geiranger, Norway 2xSF m 3 /d Footprint 60m 2

14 Tromsø, Norway m 3 /d 150 m 2 Footprint

15 PRIMARY TRADITIONAL TREATMENT PRIMARY WITH TREATMENT SALSNES FILTER Coarse Screen Sand & Grit Sedimentation / Clarifier Influent To secondary or discharge Water Treatment Sludge Treatment Thickening In One Step: Separation 30-60% TSS Thickening 4-6% DM Dewatering 20-30% DM Dewatered sludge Dewatering Dewatered sludge

16 ENDERBY, BC CANADA CASE STUDY m 3 /day 250 mg/l TSS influent

17 ENDERBY ORIGINAL PLANT RAS Final clarifier Influent m 3 /day 250 mg/l SS Screen/Grit chamber Oxidation ditch WAS Aerobic digester Total WAS: 15 m 3 /day Cl 2 Operational Challenges: 15 m 3 /day of wet sludge (1-2% DM) costly to dispose Unstable biological process Limited footprint for expansion Sludge to drying beds Effluent

18 ENDERBY REDESIGNED PLANT WAS Salsnes Forced main RAS Final clarifier EQ tank Pump Station/ EQ Tank (Old aerobic digester) Salsnes Filter SF4000 Oxidation ditch Influent m 3 / day 250mg / l SS Dewatered sludge and TSS (25% dry solids) to container 1,3 m 3 /d Chlorination process will be removed when the Enderby upgrade project is finalized Cl 2 Digester converted to EQ tank TSS now removed before biological treatment UV WAS reduced from 15 to 1.3 m 3 /day (25% DM) Chlorine replaced with UV Disinfection Effluent

19 ENDERBY REDESIGNED PLANT Housing Sludge

20 SF4000 AT ENDERBY Dewatering Sludge Reduced sludge volume >90% by Sludge DM increase from 1-2% to 20-25%

21 SUMMARY Ideal solution to replace/augment conventional primary Benefits include: Multi unit setup allows for flexibility and redundancy Integrated sludge thickening and dewatering Primary treatment and was sludge filtration in one step No use of chemicals Lower TCO Proven technology for over 20 years Over 700 units operating around the world

22 THANK YOU FOR YOUR ATTENTION Thickening Cleaning Filtration Dewatering