Treated Effluent (TSE) Reuse Applications and Challenges. Saudi Arabia

Transcription

1 Treated Effluent (TSE) Reuse Applications and Challenges Saudi Arabia >

2 Agenda General Treatment Technologies Cooling Towers Application Power Application Industry Application Brine Disposal TITRE PRÉSENTATION / SOUS TITRE / DATE 2

3 WATER REUSE DRIVERS TITRE PRÉSENTATION / SOUS TITRE / DATE 3

4 TSE AGRICULTURE / LANDSCAPE TITRE PRÉSENTATION / SOUS TITRE / DATE 4

5 TSE CUSTOMER CATEGORIES AND USES Source: TITRE PRÉSENTATION / SOUS TITRE / DATE 5

6 TSE CONTRACTUAL SUCCESSES The total value of TSE contracts is around 5.3 Billion SAR signed, this was achieved before TSE BU was spun off after incubation, as a separate Business Unit (BU) on 13th/October/2012.The TSE BU s contracts of approximately 20years duration with a total volume of 281,950 m3/day till October/2012 are as follows Source: TITRE PRÉSENTATION / SOUS TITRE / DATE 6

7 SEWAGE TREATMENT PROCESSES Sewage Treatment Plant with activated sludge Pretreatment Activated sludge Clarification Sand filtration Disinfection Sewage Treatment Plant with MBR Pressurized air Permeate Pretreatment Aeration tank Membrane tank Maintenance & backwash tank Sewage Treatment Plant with MBBR MBBR Clarifier Excess sludge Disc Filter Sewage Treatment Plant Anaerobic / Attached Growth

8 TSE CHARACTERISTICS Location: - Characteristics of WWT - Discharge - System TITRE PRÉSENTATION / SOUS TITRE / DATE 8

9 TSE CHARACTERISTICS Source: Saleem Al Saleem, King Saud University, Ms thesis

10 TSE CHARACTERISTICS Parameter PME-Costal MOW-Central MOW-TSE TSE - TYP TDS mg/l TSS mg/l Turbidity NTU BOD mg/l NH3-N mg/l NO3-N mg/l PO4-P mg/l <15 TITRE PRÉSENTATION / SOUS TITRE / DATE 10

11 TECHNOLOGIES FOR WATER REUSE VWS offer for Waste Water Biofilter Biostyr UF skid MBBR Anox-kaldness Actiflo / Multiflo Disc Filters 3FM Green-house STPs Organica Biological Settling Filters MF / UF RO RO skid for TSE Sludge Anaerobic Treatment UASB ZLD Green-house Drying Beds Solia MBR Biosep or Crossflow Benzine Treatment MPPE Evaporators Evaled Dewatering + Dryer Inos Dryer Biocon

12 Technologies for water REUSE - General Concept There is not a single specific technology for water REUSE: water REUSE is very often obtained after association of several processes/technologies adapted to each case. The main Processes/Technologies implemented for water REUSE are usually: Clarification/Filtration. Membranes. Activated carbon. Biological Treatment UV/Ozone/Chlorination Evaportaion

13 Technologies for REUSE water - General Concept CLARIFICATION/FILTRATION. For Removal of Turbidity and Total Suspended Solids. Conventional Sand Filter High Speed Flexible Fibre Filter Hydrotech Compact Disc Filter Hong Kong, China Design, Build, Operate Sludge incineration plant

14 Technologies for REUSE water - General Concept CLARIFICATION/FILTRATION. For Removal of Turbidity and Total Suspended Solids. ULTRA FILTRATION SCREEN FILTER ACTIFLO Hong Kong, China Design, Build, Operate Sludge incineration plant

15 Technologies for REUSE water - General Concept BIOLOGICAL TREATMENT For Removal of BOD, COD, TOC. MBR Membrane Bio Reactor MBBR Moving Bed Bio Reactor BIO FILTER Hong Kong, China Design, Build, Operate Sludge incineration plant

16 Technologies for REUSE water - General Concept MEMBRANES For Removal of Dissolved Solids. Reverse Osmoses Hong Kong, China Design, Build, Operate Sludge incineration plant

17 Technologies for REUSE water - General Concept DISINFECTION & STERLIZATION For Removal of Micro-organism Bacterial & Algae. Ultraviolet Ozone Chlorine Dosing System Hong Kong, China Design, Build, Operate Sludge incineration plant

18 Technologies for REUSE water - General Concept ACTIVATED CARBON For Removal of Organics. Granular Active Carbon Vessels Granular Active Carbon Note: High carbon consumption is always a key factor when using active carbon. Hong Kong, China Design, Build, Operate Sludge incineration plant

19 Technologies for REUSE water - General Concept EVAPORATORS AND CRISTALLIZERS A technology for Zero Liquid Discharge (ZLD) to generate high quality water for upstream processes meanwhile no liquid waste and production of landfilable waste HPD Cristallizer Evaled Evaporator TITRE PRÉSENTATION / SOUS TITRE / DATE 19

20 Technologies for REUSE water - General Concept Association of these technologies will depend most of the time of the following criteria: Type of pollutants into the water to be treated before REUSE. Plant capacity. Concentration of the pollutants into the water to be treated before REUSE. Usage of REUSED water after treatment. Land / Area / Space / Volume available for the treatment plant. Cost of treatment

21 COOLING TOWERS 1 ton of cooling needs 0.3 m3

22 DISTRICT COOLING - TSE Evaporation Hot water Process in Make-up water Cooling tower Several process heat exchangers Process out Cooling water blow-down Cold water

23 COOLING - ISSUES TDS: 2500 ppm ( corrosion) TSS: 25 ppm (fouling) NH4 <1 (corrosion) PO4 < 10 ppm(fouling)

24 Case Study: Filtration Requirement World s Largest District Cooling Plant; Haram Parameters Units Inlet Outlet TSS mg/l < 5 BOD Mg/L 10 < TR cooling capacity Year of delivery : 2013 (on going) Capacity : 44,000 m 3 /day Technology : Hydrotech TM

25 Case Study: BARCELONA (Spain) REUSE for Agriculture & Aquifer Process Flow Diagram of Chosen REUSE Treatment Line Paramers Inlet Outlet BOD 5 20 mg/l 5 mg/l TSS 50 mg/l 5 mg/l av. 2,4 mg/l

26 Case Study: BARCELONA (Spain) REUSE for Agriculture & Aquifer TITRE PRÉSENTATION / SOUS TITRE / DATE 26

27 Case Study: BARCELONA (Spain) REUSE for Agriculture & Aquifer TITRE PRÉSENTATION / SOUS TITRE / DATE 27

28 Case Study: TDS & NH4 Reduction Requirement Conventional X Membrane MBR X UF TITRE PRÉSENTATION / SOUS TITRE / DATE

29 Case Study: KRANJI (Singapore) REUSE for Industry Process Flow Diagram of Chosen REUSE Treatment Line Water Reclamation Plant (WRP) Hypochlorite Microfiltration 40,000 m 3 /day to wafer fabrication plants and other industries for non potable reuse Secondary Effluent Sump Equalisation Tank UV 3 x 50% Strainers Backwash to Head of WRP Micro filtered Storage Reverse Osmosis System 5 x 8MLD (2 Stage, 75% Recovery) Product Water Tank Reject to Head of WRP Anti-Scalant

30 Case Study: NH3 Reduction Requirement Ammonium mg/nh4/l 1000,0 100,0 10, ,63 Lognormal - 95% CI 95 Variable mg NH4/l RO feed_ mg NH4/l RO Permeate mg NH4/l RO Reject mg NH4/l RO Perm 2nd p Loc Scale N AD P 3,938 0, ,279 0,629 0,8200 0, ,135 0,005 5,252 0, ,537 0,147-0,7073 0, ,311 0,510 1,0 0,73 0, % values < indicated value NH3/NH4 NH3/NO3 STP performance TITRE PRÉSENTATION / SOUS TITRE / DATE 30

31 Power Generation Industry Net water consumption for power generation in thermal plant 7.6 L / 1 KWh

32 Understand General process flow diagram Seawater desalination Cooling tower Rain water collecting Industrial water production Scrubbing Wastewater Treated wastewater discharge or reuse To WWTP Boiler house Wastewater treatment plant Other water sources: Surface water Groundwater Boiler feed water production To WWTP Mineral sludge treatment and recovery Condensate polishing To WWTP

33 Understand Detailed PFDfor Power For internal use only

34 Case Study: Power HAIL II PP

35 Re-Use Industry

36 Reuse Industry

37 Overview of water uses Steel Industry

38 Brine Treatment

39 Case Study: Mopco phase 2 Brine Treatment Waste water RO reject Cooling towers Permeate 7 m 3 /h Maximum Distillate water 2.5 m 3 /h 10 m 3 /h 3 m 3 /h Intermediate tank (50m 3 ) Multiflo w softener DM& Activated Carbon filters Brine water RO (1 10 m3) 0.1 m 3 /h Evaporator 0.5 1m 3 /h sludge Demineralization Unit (Existing) Cation regeneration waste T/D Solid waste Filter press Evaporation ponds

40 Case Study: Mopco phase 2 Brine Treatment TITRE PRÉSENTATION / SOUS TITRE / DATE 40

41 REUSE, Key factors of success Site analysis Mass balance Definition of Quality Process Costs Validation Identity: all water flows Character: Quantity Quality Parameter ph Usage: Product Operation Equipment Develop: Combination Interaction Reduction Residue Conduct: Capex Opex Risk Validate: Reference Pilot test