Trials and Tribulations of Building a Pilot Plant: Tackling Water Quality Challenges Suez Water New York Gerry Remsen, PE & Elsie Kitcher, PhD NYSAWWA Spring 2017 Saratoga, NY
Outline LDF Plant Challenges Solution Pilot Plant 2 I
Lake DeForest Plant Reservoir 5.6 billion gallons LDF WTP 20 MGD Process Dissolved air flotation Dual-media filtration Free chlorine disinfection Residuals Equalization lagoons Drying beds System ~300,000 people 60 wells 1000 miles pipe 3 I
Challenges 4 I
Turbidity & Total Organic Carbon Turbidity 3-12 NTU Manganese - 1-1.2ppm Algae Dissolved Oxygen - Anoxic Conc. (ppm) 1.2 Mn - Raw 0.8 0.4 0.0 Nov-11 Jun-12 Jan-13 Aug-13 Mar-14 Oct-14 May-15 TOC Increasing 4-9ppm TOC (mg/l) 10 9 8 7 6 5 4 3 Jan-12 May-13 Sep-14 Feb-16 5
Algal Blooms (Blue-green) Coelosphaerium Pseudanabaena Anabaena Aphanocapsa Oscillatoria Merismopedia Aphanizomenon Phormidium 6
Taste & Odor (2016) 400 350 Geosmin MIB 300 Conc. (ug/l) 250 200 150 100 50 0 29-Jul 19-Aug 9-Sep 30-Sep 21-Oct 11-Nov 2-Dec 7 I
Chlorine Dose Vs Ammonia 20 1.0 16 0.8 Dose (mg/l) 12 8 0.6 0.4 Conc. (mg/l) 4 0.2 0 0.0 Oct-08 Mar-10 Jul-11 Dec-12 Apr-14 Sep-15 Jan-17 Cl2 Dose NH3-N 8 I
Total Trihalomethanes 120 100 Conc. (ug/l) 80 60 40 20 0 Nov-07 Nov-08 Nov-09 Nov-10 Nov-11 Nov-12 Nov-13 Nov-14 Nov-15 THM4 (ug/l) HAA5 (ug/l) 9 I
Solutions 10 I
Management Process optimization Reservoir Monitoring - In-situ & discrete - Nutrients - Phytoplankton Treatment Secchi Depth (m) 3.0 2.5 2.0 1.5 1.0 0.5 0.0 22-Apr 1-Jun 11-Jul 20-Aug 29-Sep 8-Nov Operator skill 11 I
Chlorine Residual Vs THM (2016) Cl2 Conc. (mg/l) 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 29-Jun 29-Jul 28-Aug 27-Sep 27-Oct 26-Nov 26-Dec 80 70 60 50 40 30 20 10 0 THM Conc. (mg/l) Filter eff TTHM Conc 12 I
THMs - LRAA 100 80 60 40 20 0 Feb-13 Aug-13 Feb-14 Aug-14 Feb-15 Aug-15 Feb-16 Aug-16 THM4 HAA5 13 I
Pilot Plant 14 I
Scope Goal Explore and Assess treatment options - Improve reliability - Water quality - Regulatory compliance Capacity 50-100 gpm Location LDF WTP Operational 10 months temperatures (34 80 ⁰ F) 15 I
Siting Implemented in current footprint No new buildings Perry House Access to raw water source Return water to head of plant Sludge to frac tank Gravity filter - 8ft of head. Abatement Parking lot Ozone shed DAF Trailer 16 I
Site Plan 17 I
Pilot Plant Schematic 18 I
Pilot in Pictures 19
Testing Protocol Temperature Raw water Raw water Raw water Raw water Cold (32 50 O F) Pre Ozone Warm (50-70 O F) DAF Pre Ozone DAF DAF Hot (>70 O F) Alum / PACl / FeCl 3 DAF Inter. Ozone Inter. Ozone Filters Filters Filters Filters UV 20 I
Raw Water KnMO4 at intake Cost benefit analysis Feasible Long supply line (380 ft) vs relocate KnMO 4 feed Raw water intake was tapped up stream at the Howell bunger valve at the dam. 21 I
Materials Selection Criteria Does not react with ozone Proven track records Readily available Reasonable price Piping HDPE - 2 (50ft and 30ft in length) 16in ID SCH80 PVC 1.5in stainless steel HDPE underground and PVC above grade 22 I
Insallation & Power Insallation Fiber glass with PVC jacketed Pipe chases Closed cell spray polyurethane foam (SPF) SUEZ s safety goals Egress platform and a skirt built around the DAF trailer. Electrical power 200 amp 480 volt Electrical conduit and wiring Equipment electrical requirements Europe vs US 480/230/208/120 volts and 60 hertz. 23 I
Conclusion Investigate innovative ideas Time and space constraints. Design of improvements water quality challenges Innovative design can help overcome the challenges presented by physical constraints while still achieving results in a cost effective manner. 24 I
THANK YOU!!! QUESTIONS?