Suitable anaerobic technologies for Dairy resource recovery

Transcription

1 Suitable anaerbic technlgies fr Dairy resurce recvery Erik Draber Bithane Systems Internatinal, Delft NL Water Technlgies

2 Bithane s Granular Technlgies Bithane Advanced UASB Well prven technlgy with new three-phase-separatr fr all industrial wastewaters Rbust, with high scod remval efficiency Restrictin fr SS (<1,000 mg/l) and FOG (< 100 mg/l) cntent Bibed Advanced ESGB High rate technlgy with new three-phase-separatr fr mst industrial wastewaters Less vlume, less ft-print with similar scod remval efficiency Mre sensitive regarding SS and FOG 2 2

3 Bithane s nn-granular technlgies Bibulk CSTR Slid waste / waste slurry digestin With r withut sludge recirculatin Suitable fr high COD / FOG / SS and lw flws Memthane Anaerbic MBR New technlgy fr high strength wastewater Using Crss-flw UF membranes Very High COD / SS remval efficiencies 3 3

4 Dairy effluent characterizatin Milk Prcessing Prductin cleaning, CIP High flw rates COD 1,500 3,000 mg/l (Prteins, Fat) TSS 300 mg/l, FOG mg/l C, Usually high P, high N Nt always anaerbic applicable due t lw SCOD Gd bidegradability Cheese / Ygurt Prductin cleaning, CIP, plus whey Lw flw rates COD 1,500 10,000 mg/l (Prteins, Fat, lactic acid) TSS 300 mg/l FOG mg/l, C Usually high P, lwer N Anaerbic applicable, sphisticated chice f technlgy Gd bidegradability Additinal COD surce: acid whey (COD 60,000 mg/l, very well degradable) Ice-cream Prductin cleaning, CIP Medium flw rates COD 3,000 20,000 mg/l (sugar, starch) TSS 100 mg/l, FOG mg/l C Usually lwer P, lwer N Anaerbic applicable Gd bidegradability

5 Case Study 1 - Ice-cream, Germany 2003 Effluent frm Ice-cream prductin High in COD Fluctuatins in FOG and COD cntent depending n prductin Flw 800 1,300 m ³ /d COD 3,000 25,000 mg/l Pre-treatment Granular sludge reactr (Bibed EGSB) DAF-flat t municipal digestr Anaerbic effluent t municipality Municipal Sludge Digestr 5

6 Case Study 1 - Ice-cream Germany 2003 Factry Effluent CHP unit Settling Pnds Buffer Tank DAF unit Cnditining tank and Bibed EGSB Nitrificatin / Denitrificatin Discharge t river Surplus Sludge (Municipal) Digestr 6

7 Case Study 1 - Ice-cream Germany 2003 Operatinal results COD reductin DAF unit: ttal COD remval: % FOG remval: 60 70% t municipal sludge digester Anaerbic: ttal COD reductin: 70 75% sluable COD reductin: 80 85% Ttal COD reductin: 83 %, Bigas cnversin in EGSB plant: 70% f the ttal COD = 2,000 Nm³/d plus extra bigas due t flating sludge in municipal digester.

8 Case Study 2 Mlekvita Dairy Pland 2011 Dairy nrth-east f Pland prductin extensin, retrfit f existing plant Prductin f milk, butter, ygurt, cream, cttage cheese Presence f acid whey waste stream High Flw = 5,000 m³/d, lw temperature C COD lad: 30,000 kg/d Highly fluctuating depending n prductin cleaning cycles Prcess chice: Optimized DAF separatin step CSTR prcess fr DAF flat, acid whey and aerbic surplus sludge 7000 m 3 reactr 20 tcod/d Bibulk CSTR Use f existing aerbic wwtp 8

9 Case Study 2 Mlekvita Dairy Pland 2011 Dairy Effluent Municipal Wastewater Buffer Tank DAF unit Nitrificatin / Denitrificatin Final sedimentatin Discharge t river CHP unit Acid Whey Bibulk CSTR Digestr Centrifuge 9

10 Case Study 2 Mlekvita Dairy Pland 2011 Operating results f the anaerbic system with COD lad f 18,000 kg/d TCOD reductin 63 % TSS reductin 40% Bigas prductin: 7,150 m³/d and 60-65% CH 4

11 Case Study 3 - Arla Dairy, UK C-perative fr prcessing f 1.1 billin liter fresh milk / year ARLA: Arla is aiming fr the dairy t be wrld s first zer-carbn emissin milk prcessing facility using cutting edge renewable energy slutins Design Phase 1: COD remval bigas prductin 11

12 Case Study 3 - Arla Dairy, UK Prcess chice: Memthane Anaerbic MBR 700 m 3 reactr 5 tcod/d 3 external crss-flw membrane skids fr 550 m³/d Design Phase 2: AnMBR extensin due t prductin increase Advanced N remval with Anitamx deammnificatin MBBR prcess Advanced P - remval 12

13 Case Study 3 - Arla Dairy, UK Milk prcessing effluent Flare CHP unit Sieve Buffer Tank Memthane digester UF crss flw filtratin Sludge Strage Tank 13

14 Inf. COD cnc. (mg/l) Eff. COD cnc. (mg/l) Case Study 3 - Arla Dairy, UK TCOD cncentratin /1/15 1/2/15 4/3/15 4/4/15 5/5/15 5/6/ Influent TCOD Effluent TCOD Permeate TCOD < 100 mg/l, TCOD remval > 99% Prducing >10% f Arla s energy cnsumptin ut f their residues

15 Erik Draber Bithane System Internatinal T: M: Thank yu fr yur attentin Questins?