Eco-efficient Solids Separation Using Salsnes Technology Wayne Lem Trojan Technologies July 18 2013
TROJAN TODAY INNOVATIVE WATER TREATMENT SOLUTIONS > 800 associates, operating from 25 locations in 12 countries Over 8,000 municipal installations on 6 continents Partnerships: Over 200 offices in 90 countries on 6 continents Logistics & Manufacturing in Canada, US, Europe and China Part of Danaher Corp. with revenue of $18B (2012)
INTRODUCING TROJAN S BUSINESSES UV Solutions for Industrial & Commercial Applications Municipal UV Solutions for WW, DW and ECT Providing Safe, Clean Water for Homeowners Sustainable Solution for Biosolids Processing Redefining Ballast Water Treatment with UV & Filtration Eco-efficient Solids Separation for Municipal WW & I/C Peroxygen (H 2 O 2 ) based Technology & Service Programs
Outline Primary Filtration Applications Technology Overview Process Description Full-scale application: Enderby, British Columbia, Canada Summary
CONVENTIONAL WWTP SCHEME SECONDARY TREATMENT Biological Clarifiers DISINFECTION Plant effluent to river Disinfection PRIMARY TREATMENT Thickener Methane Gas Collection System Settling Tanks SLUDGE PROCESSING Digester De-Watering Biosolids to landfill
MUNICIPAL APPLICATIONS Primary treatment for new plants Primary sludge thickening Primary sludge dewatering Stormwater and CSO treatment Expanding primary or secondary capacity We were facing an expansion of 2 to 3.5 MGD by adding another oxidation ditch. Instead we added better primary treatment and were able to defer spending several million dollars by spending $250k on a Salsnes Filter
INDUSTRIAL APPLICATIONS Tanneries, pulp & paper, slaughterhouses, food processing, aquaculture Thickening Cleaning Filtration Dewatering
INCREASE EFFICIENCY IN AQUACULTURE Filtration enables closed-loop water cycle saving process water. Removes problem species (e.g. Rotatoria, sealice) improves fish health and increases production
Tromso, Norway 10.5 MGD (1,660 m 3 /hr) 1600 ft 2 (150 m 2 ) Footprint
BENEFITS OF SALSNES MOVING BELT FILTRATION <50% the cost of sedimentation/clarification Ideal for greenfield and plant upgrades Compact, modular design significantly reduces footprint to 1/10 th of traditional primary treatment High treatment efficacy (>50% SS, >30% BOD) Sludge dewatering reduces disposal costs Enables waste to energy conversion Reduces environmental footprint Per: Norwegian State Pollution Control Agency
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 Outlet
INTEGRATED THICKENING & DEWATERING Screw-press dewatering, evacuates odors 4-6% DM after thickening, 20-30% after dewatering Thickening Collection, conveyance Dewatering Sludge Outlet Filtrate
THE KEY: CONTROLLING THE FILTER MAT If 25% of particles in influent > filter mesh opening = filter mat build-up Thicker mat more TSS/BOD removal, smaller solids Operating Variables: Influent flow rate Particle size distribution 40% 200 µm 50% 150 µm 60% 100 µm 70% 50 µm 80% 20 µm Influent TSS levels Belt speed Mesh size (microns)
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 40-80% TSS Thickening 4-6% DM Dewatering 20-30% DM Dewatered sludge Dewatering Dewatered sludge
ENDERBY, BC CANADA CASE STUDY 1500-2000 m 3 /day (0.5 MGD) 250 mg/l TSS influent
ENDERBY ORIGINAL PLANT RAS Final clarifier Influent 1500-2000 m 3 /day 250 mg/l SS Screen/Grit chamber Oxidation ditch WAS Operational Challenges: 15 m 3 /day of wet sludge (1-2% DM) costly to dispose Unstable biological process Limited footprint for expansion Aerobic digester Sludge to drying beds Total WAS: 15 m 3 /day Cl 2 Effluent
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 1500-2000 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 WAS reduced from 15 to 1.3 m 3 /day (25% DM) Chlorine replaced with UV Disinfection UV Effluent
ENDERBY REDESIGNED PLANT Housing Sludge
SF4000 AT ENDERBY Dewatering Sludge Reduced sludge volume from 2.8 to 0.2 gpm (0.2 to 0.01 L/s) Sludge DM increased from 1-2% to 20-25%
COST BENEFITS Significantly lower total lifecycle cost Less land needed (1/10 th of conventional primary) Less civil works Can be designed for higher TSS/BOD removal rates than conventional primary enables downsizing / less aeration No need for separate thickening or dewatering processes Higher energy value in primary sludge Low maintenance and operation Fully automated equipment
SUMMARY Technology enables many industrial and municipal applications Ideal solution to replace/augment conventional primary Benefits include: Highest TSS/BOD removals in smallest footprint Reduced stress on downstream processes Integrated sludge thickening and dewatering Produces smaller volume of drier sludge Lower capital, installation and operating costs Fully automated, little and easy maintenance Proven technology for over 20 years Over 550 units operating around the world
QUESTIONS? For more information, please contact: Abraham Alvarado aalvarado@trojanuv.com Jose Fragaso jfragaso@trojanuv.com
APPENDIX
PRODUCT OVERVIEW
PRODUCT OVERVIEW Enclosed Units Open Units Model SF:1000 Models SF:2000 SF:4000 SF:6000 Models SFK:200 SFK:400 SFK:600
TECHNOLOGY Filter mesh Air Knife enables drier sludge Integral controls manage levels, belt speed
AUTOMATIC MESH CLEANING Hot water flush for FOG Air Knife
TORREVIEJA Spain 15.9 MGD (2500 m 3 /hr) Cedar Grove, BC Primary WWTP, ocean discharge Wastewater Reuse - TrojanUVFit TM SF:1000 treating Y l/s (X MGD) Filtermesh Bar Screen Inlet Air Compressor Sludge
O&M REQUIREMENTS
O&M REQUIREMENTS Weekly (2-6 hours) Visual control of filtermesh, dewatering and blower Cleaning level sensors, Air Knife support and dewatering unit* Monthly (2-4 hours) Grease upper roller Controlling blower air filter Inspect Air Knife and flushing system Annually (2-6 hours each unit) Control mesh, bearings, plastic seals, wedge wire screen and auger wear Change blower oil * Dewatering Unit cleaned every 2 weeks
UTILITIES & SPARE PARTS Power: 5-10 kw/unit/hour Hot water: 20-30 l/unit/cycle ( 2-4 times /day) Spare Parts: Filtermesh (2-3 years) Bearings (2-4 years) Air Knife (2-3 years) Plastic Seals (3-5 years) Wedge Wire Screen (2-4 years) Dewatering Screw (2-4 years)