Experience from start-up and operation of ANITA Mox plants and development of a new Hybas ANITA Mox process

Transcription

1 Experience from start-up and operation of ANITA Mox plants and development of a new Hybas ANITA Mox process Nitrogen Removal Technologies 15 th May Leeds Romain Lemaire (Veolia Water, Paris) Magnus Christensson (AnoxKaldnes) Bruno Bigot (Veolia Water Solutions & Technologies UK)

2 Principle ANITA Mox 1-stage Deammonification -60% O 2-100% COD NO 3 - NOB O 2 COD Heterotrops AOB NO 2 - NO 2-55% NH % Aerobic O 2 (40%) NH 4 + Anammox COD (0%) N 2 + NO 3-89% 11% Anoxic O 2 COD Anammox Bacteria

3 ANITA Mox MBBR process High sludge retention time (SRT) needed Necessity to protect anammox bacteria (O 2 / NO 2 ) Biofilm Necessity to keep bacteria into the system (avoid washout) Maximum robustness and stability desired MBBR Liquid NH 4 + N 2 Nitritation O 2 AOB NO 2 - Biofilm Anammox Media Anoxic Aerobic Simultaneous in biofilm

4 ANITA Mox Sjölunda WWTP, Malmö (Sweden) 4 x 50m 3 = 200m 3 Sjölunda WWTP reject water Capacity = 200 kgn/d mgn-nh 4 /L 1 st ANITA Mox reference Flexibility for fullscale testing

5 ANITA Mox Different Media tested K3 K5 BiofilmChip M 500 m 2 /m m 2 /m m 2 /m 3 MBBR = Media + Grid No risk of losing Anammox biomass

6 ANITA Mox BioFarm concept Seeded carriers New carriers during start-up BioFarm concept = Providing seeded carriers for rapid start-up of future full-scale ANITA TM Mox units

7 NH4 load & removal rates (kgn/m3.d) T C BioFarm N-load / NH 4 -rem 1,5 1,4 1,3 1,2 1,1 1 0,9 0,8 0,7 0,6 0,5 0,4 0,3 0,2 0,1 0 NH4-N load NH4-N rem T C 130 reject water supply limitation kgn-nh 4 /m 3.d in 4 months with only 3% seeding

8 NH4 & TN removed (%), NO3/NH4 BioFarm Performance TN removal % NH4 removal % % NO3-prod / NH4-rem Days 90% NH 4 removal and 80% TN removal Patented DO control strategy reduce NO 3 production <11% kwh/kgn-nh 4 removed

9 ANITA Mox Sundets WWTP, Växjö (Sweden) 3.5m depth Fine bubble aeration 350 kgn/d 430 kgn/d reject water Existing 350m 3 SBR MBBR K5 carrier (AnoxKaldnes) Quick seeding (13% from BioFarm) Started in January 2012

10 NH4 load & NH4 removal rate (kgn/m3.d) Reject water flow (m3/d) Växjö N-load / NH 4 -rem 0, ,6 0,55 0,5 NH4-N load NH4-N rem Reject Water Flow (m3/d) Design Flow = 350 m 3 /d , , ,35 0, , , ,15 0,1 0,05 Real Flow = m 3 /d Days Treating all reject water after only 30 days (with 13% seeding) kgn/m 3.d ½ design N-load expected Co-digestion

11 %NH4rem, %TNrem, ratio NO3/NH4 T C Växjö Performance 100% 90 90% 80 80% 70% 60% 50% 40% % 20% 10% 0% TN removal % NH4-N removal % ratio NO3-prod/NH4-rem T C Days 90% NH 4 removal and 80% TN removal DO control strategy reduce NO 3 production <11%

12 NH4 removed (kgnh4-n/m3.d) Växjö N-load vs NH 4 -removal 0,6 0,5 y = 0,88x R² = 0,97 0,4 0,3 0,2 0, ,1 0,2 0,3 0,4 0,5 0,6 0,7 NH4 load (kgnh4-n/m3.d) 88% NH 4 removal since start-up

13 ANITA Mox Holbæk (DK) Landfill Leachate storage tank (= 600m 3 ) ANITA Mox 120 kgn/d (reject water + leachate) Retrofitting 600m 3 existing tank Quick seeding (BioFarm) Commissioning June 2012

14 % N-removal T C Holbæk Performance N-removal % % N-NH4 % NO3-N produced to NH4-N removed Temperature DO regulation Off Days 80% NH 4 removal even at 15 C Patented DO control strategy very efficient to keep NO 3 <11%

15 ANITA Mox Grindsted, Denmark 110 kgn/d reject from co-digester 140 m 3 (new tank) Quick Seeding (BioFarm) Start-up May tons/year to BioPasteur digester: 45% of DS from wastewater sludge 35% of DS from organic household waste 20% of DS from organic industrial waste

16 ANITA Mox James River WWTP, Newport News, VA US 250 kgn/d reject water Retrofit of existing tank Quick seeding (BioFarm) Start-up Q Existing Hybas TM system 60,200m 3 /d

17 ANITA Mox South Durham, North Carolina US ANITA Mox 890 mg/l 333 ammonia kgn/d reject reject water water combination Retrofit of existing HRSD sludge tank 284 m 3 Quick /d flow seeding (BioFarm) Retrofit Start-up of existing Q1 tank 2014 Seeding 3 years (BioFarm) payback Start-up US Q3 based 2013 BioFarm Plant has existing Hybas TM system 60,200m 3 /d

18 New Development IFAS configuration MBBR IFAS Liquid + NH 4 N 2 Nitritation O AOB - 2 = NO mg/l 2 Flocs (1-3 g/l) Liquid Nitritation AOB + NH 4 - NO 2 N 2 O 2 < 0.5 mg/l Biofilm Anammox Media Aerobic Anoxic Biofilm Anammox Media Anoxic AOB in biofilm = NO 2 - limitation AOB in flocs = less NO 2 - limitation

19 Bench-scale trial IFAS and MBBR A Influent AD Sidestream NH 4 = 900 mgn/l tcod= 400 mg/l BOD = 30 mg/l tcod/n = 0.4 sbcod/n = 0.25 B Conditions 30 o C 43 % K5 carrier Volume reactor = 7 L D.O. IFAS = 0.2 mg O 2 /L D.O. MBBR = 1.0 mg O 2 /L IFAS MBBR 19

20 N-rem (gn/m 2.d) Hybas ANITA Mox Bench-scale Stage I R1: MBBR R2:MBBR (150mg/L NH 4 -N) R1:N-Rem (gn/m².d) Stage II R1: MBBR R2:IFAS (150mg/L NH 4 -N) Stage III R1: MBBR R2:IFAS (70mg/L NH 4 -N) Time (days) R2:N-Rem (gn/m².d) Stage IV R1: MBBR R2:IFAS (30mg/L NH 4 -N) Stage V R1: MBBR R2:IFAS (10mg/L NH 4 -N)

21 N-rem (gn/m 2.d) MLSS (g/l) Hybas ANITA Mox Bench-scale Stage I R1: MBBR R2:MBBR (150mg/L NH 4 -N) R2:N-Rem (gn/m².d) Stage II R1: MBBR R2:IFAS (150mg/L NH 4 -N) Stage III R1: MBBR R2:IFAS (70mg/L NH 4 -N) Time (days) Stage IV R1: MBBR R2:IFAS (30mg/L NH 4 -N) MLSS (g/l) Stage V R1: MBBR R2:IFAS (10mg/L NH 4 -N)

22 N-rem (gn/m 2.d) MLSS (g/l) Hybas ANITA Mox Bench-scale Stage I R1: MBBR R2:MBBR (150mg/L NH 4 -N) R1:N-Rem (gn/m².d) R2:N-Rem (gn/m².d) MLSS (g/l) Stage II R1: MBBR R2:IFAS (150mg/L NH 4 -N) Stage III R1: MBBR R2:IFAS (70mg/L NH 4 -N) 0 Expected IFAS design = 2-3 kgn/m 3.d (x2-x3 pure MBBR) Time (days) Stage IV R1: MBBR R2:IFAS (30mg/L NH 4 -N) Stage V R1: MBBR R2:IFAS (10mg/L NH 4 -N)

23 N-removal (gn/m 2.d) N-removal (gn/m 2.d) Hybas ANITA Mox Bench-scale MBBR IFAS N-NO 2 (mg/l) N-NO 2 (mg/l) Higher NO 2 concentrations in IFAS Higher N-removal rates with higher NO 2 concentrations Optimum NO 2 level depends of hydrodynamics condition

24 Hybas ANITA Mox Bench-scale qpcr : Evolution (Anammox, AOB, NOB and total Bacteria) Suspended solids composition (MLSS) MBBR IFAS MBBR 1.00E E E E E E E E E E E E E E E Time (days) Anammox AOB Total Bacteria NOB 1.00E Time (days) Anammox AOB Total Bacteria NOB 1. Stable SS composition in MBBR 2. Augmentation of Biomass in IFAS 3. Higher increase of AOB in IFAS (x1000!) 24

25 Hybas ANITA Mox Bench-scale qpcr : Evolution (Anammox, AOB, NOB and total bacteria) Biomass repartition IFAS vs MBBR Anammox Biofilm MLSS Mode MBBR 99% 1% Mode IFAS 96 % 4% AOB Mode MBBR 99% 1% Mode IFAS 7% 93% x in IFAS Total biomass Mode MBBR 92% 8% Mode IFAS 52% 48%

26 Hybas ANITA Mox IFAS configuration Hybas ANITA Mox = Higher N-removal with combination of carriers and suspended biomass

27 New Development Mainstream N-removal ANITA Mox Pilot trial on BOD-treated WW: After BOD AS (Sweden) After UASB (Middle East) 3 different systems tested: Pure MBBR IFAS Sequenced treatment of reject water and BOD-treated WW

28 ANITA Mox Applications (MBBR & IFAS) Municipal : Sidestreams: Anaerobic Digested Sludge centrate Thermal Hydrolysis* + AD centrate Mainstream: (IFAS = easy retro fit) Post anaerobic (UASB) Post high-rate BOD-stage validated validated under evaluation under evaluation Industrial : Landfill Leachates (old) validated Post anaerobic from Bio-composting (COD/N=2) validated Micro-electronic / Semi-cond validated Other Post anaerobic effluent (slaughterhouse, F&B) under evaluation * (Biothelys TM, Exelys TM, Cambi TM )

29 ANITA Mox Conclusion Stable and robust Low OPEX + C-footprint : - 60% O 2 / no COD dosing / kwh/kgn rem / N 2 O < 0.5% Efficient aeration control Continuous aeration no mixer / low N 2 O Keep NO 3 < 11% no NOB (MBBR & IFAS) N-removal performances : MBBR = >1 kgn rem /m 3.d (Sidestream) IFAS = 2-3 kgn rem /m 3.d (Sidestream) BioFarm seeding strategy = Quicker Start-up 6 references : Malmö WWTP (Sweden) 200 kgn/d reject water 2010 Växjö WWTP (Sweden) 430 kgn/d reject water 2012 Holbæk WWTP (DK) 120 kgn/d reject water + leachate 2012 Grindsted WWTP (DK) 110 kgn/d co-dig. sludge + food waste May 2013 James River WWTP (USA) 253 kgn/d reject water Aug 2013 South Durham WWTP (USA) 333 kgn/d reject water late 2013

30 THANK YOU!!