Water Reuse: identifying the optimal solution for the desired water quality. Didier PERRIN Technical & Marketing Director Degremont Asia

Transcription

1 Water Reuse: identifying the optimal solution for the desired water quality Didier PERRIN Technical & Marketing Director Degremont Asia MIECF Macao - March 21, 2013

2 Content Water reuse: a wide range of needs Standards and norms as function of needs Which treatment for each goal? Case studies

3 Water reuse: a wide range of needs Usages 1: agriculture uses Non public Landscape irrigation Non human Crops irrigation 3

4 Water reuse: a wide range of needs Usages 2: non potable water uses Human crops irrigation Industries Urban Usages (public access) Toilets flushing 4

5 Water reuse: a wide range of needs Usages 3: indirect potable water uses Industries Injection wells Pumping wells Indirect drinking water usages Aquifer recharge Principle of the barrier Specific Cultures irrigation 5

6 Standards and norms as function of needs GUIDELINES NORMS Secondary + Disinfection Usages 1 SS < 10 to 30 mg/l Fecal Coliforms < 1000 cfu/100 ml (Helminth eggs < 1 u/l) USEPA (irrigation) Algeria WHO Tertiary + Disinfection Usages 2 SS < 5 mg/l Fecal Coliforms < 10 to 200 cfu/100 ml E. Coli < 10 à 200 cfu/100 ml Total Coliforms < 2.2 mpn / 100 ml NTU < 2 to 5 NTU Helminth eggs < 0.1 u/l Salmonellas 0 to 1u/10l California (Title 22) WHO USEPA 1992 Spain Tunisia France China Macao... Quaternary (Salts or Organics Usages 3 Usages 2 Requirements + TDS < 800 mg/l (salinity or conductivity) TOC < 5 mg/l Site specific

7 Which treatment for each goal?

8 Cases studies Australia China France Italy Jordan Mexico Qatar Saudi Arabia Spain United States

9 TAIF (Saoudi Arabia) Usages 3 Pre-treatment Coagulation / flotation Media Filtration GAC Filtration Disinfection Cl 2 Activated sludge Clarification

10 - A predecessor TAIF project overview Taïf STP: m 3 /d for landscape irrigation, fire protection and golf courses Activated sludge N-DN Clarification Coagulation Flocculation Flotation Multimedia Filtration Cl 2 Cl 2 Design data Chlorination GAC Filtration Disinfection TSS (mg/l) ,5 BOD 5 (mg/l) COD (mg/l) < 15 NTK (mg/l) Detergents (mg/l) < 1

11 Ciudad Juarez, Mexico Usages 2 Pre-treatment Activated sludge Clarification Disinfection Cl 2

12 Ciudad Juarez - Project overview Screening Pumping Influent Av flow = 172, 800 m3/d 13,000 m3/h Sewer collection chamber Aeration tank Sludge thickening Secondary clarifier Cl 2 Disinfection Effluent - Fecal coliforms : < 1000 col / 100 ml - Helminth eggs: < 1 / l IRRIGATION

13 LUSAIL (Qatar) Usages 2&3 Pre-treatment Disinfection Cl 2 MBR

14 Lusail project - overview Lusail STP: lanscape irrigation, crops, golf, aquifer recharge Parameter Unit Value Basis of compliance TSS mg/l < 2 90 % ile BOD5 mg/l < 5 90 % ile COD mg/l < % ile N.NH4 mg/l < 1 90 % ile Turbidity NTU < 2 90 % ile ph % ile Dissolved oxygen mg/l < 2 90 % ile Chlorine (free residual) mg/l % ile Fecal Coliforms MPN / 100 ml 0 90 % ile Nematode eggs / L 0 95 % ile Giardia cyst / 40 L 0 90 % ile

15 Lusail Project Overview Avg m 3 /d Peak m 3 /h Lusail STP: m 3 /day MBR plant for landscape and crops irrigation, golf, aquifer recharge Pre-treatment 6 mm / Grit removal Equalization Fine screen 4 x 2500 m 3 1 mm Cooling 1 tower Aeration 4 x m 3 MBR Chlorination TSE Pumps m m 3 /h Reuse 77,600 m² of membrane surface

16 DOHA (Qatar) Usages 2 Pre-treatment Activated sludge Clarification Sand Filtration Disinfection Cl 2

17 Doha West project - overview Doha West STP: Dedicated plant to reuse lanscape irrigation, crops, golf Parameter Unit Value Basis of compliance TSS mg/l < 5 90 % ile BOD5 mg/l < 5 90 % ile COD mg/l < % ile N.NH4 mg/l < 1 90 % ile TN mg/l < % ile TP mg/l < 2 90 % ile Turbidity NTU < 2 90 % ile ph % ile Dissolved oxygen mg/l < 2 90 % ile Chlorine (free residual) mg/l % ile Fecal Coliforms MPN / 100 ml 0 90 % ile Nematode eggs / L < 1 95 % ile Giardia cyst / 40 L < 1 90 % ile Enteric viruses PFU / 40 L < 1 90 % ile

18 Doha West project - overview REUSE 100% influent m3/j with m3/h Secondary treatment Clarification Sand filter Submerged membranes 12 x 88 m² 7 x m² Disinfection Chloration : m3

19 Los Angeles, California Usages 3 Pre-treatment Activated sludge C,N,DN Clarification Rapid sand Filtration MF / UF Disinfection Cl 2 /UV Reverse Osmose

20 West Basin WRP, California (USA) Highlights 1995: West Basin WRP (The Edward C. Little WRP), First MF/RO, 47,300 m 3 /d Five types of reuse water: Irrigation: title 22 Low pressure boiler High pressure boiler Cooling tower Aquifer recharge Step by step implementation 2006: 215,000 m 3 /d Final by 2015: 340,000 m 3 /d

21 Cl Cl West Basin Water Recycling Facility Treatment Trains and Satellite Plants 2006 HYPERION WWTP secondary effluent 215, 000 m 3 /d Carson Regional Recycling Plant High pressure Reverse boiler water MF Osmosis Low pressure boiler water FeCl 3 Tertiary nitrification Chevron & Exxon/Mobil Refineries (Biofor Cooling water Disinfection Cl Title 22 effluent Filtration Flocculation Mono-media (Cl) Storage Urban uses, Irrigation, 13% Microfiltration High pressure Reverse Osmosis boiler water Low pressure boiler water Industrial reuse, 65% Decarbonator Reverse Osmosis Filtration Reverse Multi-media Osmosis Microfiltration UV Disinfection H 2 O 2 Barrier effluent Aquifer recharge, 22%

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