Water clarification technologies Case study

? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
Degremont
over 70 years of providing treatment solutions
? HEAD WOR K S ? BIOLOG Y ? SEPA RATIO N ? MEMB RA NE ? DISI NFECTION ? BIOSOLID S ? REUSE
Wide range of t re atm ent solutions ? Hea d wor ks ? Disi nfe ctio n ? Biol o gy ? Bios ol ids ? Sepa ration ? Recy cl e/Re us e ? Memb ra ne
Degremont Water Clarification Technologies
Case Stud y of AQU AD AF Clarifier
presented by
Degremont Water Clarification Technologies
q q q q q
Turbocirculator Densadeg Pulsator Pulsatube AquaDAF
-
solids contact high rate solids contact with lamella tube pulsating sludge blanket pulsating sludge blanket with lamella tubes very high rate dissolved air flotation
Mukesh GROVER
Tech nical Dir ecto r
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :2
? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
Degremont Clarif ication Technologies
Typical Clarification Rates and Application
? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
Turbocirculator? Clarif ier
High rate solids contact type reactor clarifier
Clar if ic ati o n Te ch n ol og y
Ty pi cal Cl ar ifi ca ti on Ra te s (m /hr )
Ty pi cal A ppl ic ati o n
Maj or I n di an Ins ta lla ti on s
Turbocirculator? Densadeg ?
2.0 to 3 .5 (upto 5.0 for softening) 10.0 to 20.0 (upto 30 for softening) (upto 100 for s torm water)
Clarification, Softening Clarification, Softening, Storm water clarification, Filter Was hwater c larific ation Clarification (>10 NTU) Clarification (<50 NTU)
Delhi, Angul (Oris sa) Delhi, Bangalore
Typical applic ations: ? DW : Clarification, Lime Softening, Presettler ? WW : Primary & Tertiary Clarification ? IWW/PW : Carbonate removal, Metal Precipitation, Colour removal
Featu re s:
Delhi, Chennai, Bangalore, Mumbai, Kolkat ta Bangalore
? Pulsator Pulsatube?
2.5 to 4 .0 4.0 to 8 .0 25.0 to 40.0
? Simple & robust process ? Very e fficient ? Multiple application
AquaDAF?
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :3
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :4

? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
Densadeg? Clarif ier
High rate solids contact type Lamella clarifier
? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
Pulsator? Clarif ier
Pulsating sludge bla nket type clarifier
Typical applic ations: ? DW : Clarification, Lime Softening ? WW : Primary & Tertiary Clarification ? IWW / PW : Carbonate removal, Metal Precipitation, Colour removal
Typical applic ations : ? Raw Water Clarification (River, Dam, Reservoir) ? Clarification of Water with Algae
Featu re s: ? Compact, Versatile & robust ? Inbuilt Thickener ? Very efficient ? High Quality Water ? Multiple appl ications
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :5 Wa te r In d ia 20 1 1 (De l h i) Sl d i e :6
Featu re s: ? Modular & robust process ? Rectangular Flat Bottom RCC Tank ? No underwater moving parts ? Even water distribution over entire bottom ? Even sludge withdrawal across the tank
? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
AquaDAF ? Water Clarif ier
Dissolved Air Flotation process
? HEAD WOR K S ? BIOLOG Y ? SEPA RATIO N ? MEMB RA NE ? DISI NFECTION ? BIOSOLID S ? REUSE
Typical applic ations: ? Clarification of low turbidity waters ? Water with low density solids (i.e. Algae, etc.) ? Water with high TOC ? Cold waters; Thermal variation ? pretreatment before Membrane filtration Featu re s: ? Simple & robust process ? Very small footprint ? Modular ? Polymer not necessary
AquaDAF? Clarifier
High-Rate Dissolv ed Air Flotation Technology by Degremont
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :8

? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
AquaDAF ? Water Clarif ier
Internal System (HF Model)
S lud g e Ch ann el M ob ile Weir Clarif ied Water Ch ann el
? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
AquaDAF ? Water Clarif ier
Operating Principles Re cy cle St re a m:
? Recycle flow: 8-10% of throughput ? Rec y c le flow Operating Pres s ure: 4- 5 bar ? Unpac k ed Saturator Ves s el
Hyd rau lic Floccu lation Com p r essed Air Flash M ixer
Air-Water Disp ersion Zon e
Recycle d clarifiedwater Accu m u lated S lud g e Layer
Sludge
? Compres s ed air injec tion
Micro-Bubble P roduction:
? Bubbles production : s pecial depressurization nozzles
Clar ified Water
? Bubble diameter: Range 10-100 μm ? Air Blank et: Milk y appearanc e ? Solids adhere to bubbles and float to surface ? Continuous produc tion of air blank et
Raw wate r
Coag u lated Water I n let (af ter Flash M ixer)
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :9
False Fl oor Tran sition Zon e
Flotation Zon e
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :1 0
? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
AquaDAF ? Water Clarif ier
Advantages ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
AquaDAF ? Water Clarif ier
Major References worldwid e 23 MLD 34 MLD 35 MLD 44 MLD 60 MLD 72 MLD 77 MLD 80 MLD 92 MLD (sea water) 106 MLD 285 MLD 480 MLD (sea water) 575 MLD (sea water) 600 MLD (u/c (u/c) ) 770 MLD (u/c (u/c) )
? Flexible & Robust :
? treats water with temperature >3°C ? best solution for low turbidity / high al g ae raw water ? adapt s to oc cas i o nal peaks of TSS or Turbidit y upto 200 NTU.
? Cost effe ctiv e :
? Reduc tion in the time required for the response to 5 min ? Decreas e the size of footprint while retaining its performanc e.
? Eas y to oper at e :
? Easy to operate and maintai n (very few mec hanicals, no lam ella modul e s , no c logging) ? No need to add material to weigh down the flocs. ? Ins tantaneous Start and Stop.
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :1 1
USA - Seneca USA - South San Joaquim FRANCE - St Brieux CANADA - Ga tineau CHINA - Macao FRANCE - Apremont USA - White Tanks USA - Lake de Forest CHILE - Minera Escondida CHINA - Qin Gzhen BRAZIL - Manaos SPAIN - Barcelona BAHRAIN - Al Dur INDIA – Bangalore USA – Howarth Howarth, , NJ
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :1 2

? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
AquaDAF ? Water Clarif ier
TK Halli WTP, Bangalore - Project Fact Sheet
Bangalore Water Supply and Sewerage Board TK Halli (~85 k m from Bangalore c ity ) Drink ing water produc tion for Bangalore c ity and s uburbs Riv er Cauv ery , from Shiv a Balanc ing res erv oir Water Line : Cas c ade Aerator + Prechlorination + Flash Mixer (with alum) + AquaDAF Clarfier + Aquaz ur V Rapid Gravity Sand Filter + Post chlorination Sludge Line : Sludge Thickener + Mechanical Dewatering Jan-Feb 2012
? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
AquaDAF ? Water Clarif ier
TK Halli WTP, Bangalore - Project Fact Sheet HF3 0
10 units x 90 m2 eac h 28 m3/m2.hr design clarification rate Flocculation – Hy draulic Hy draulic Des ludging – by Mobile Weir on c larified water s ide Footprint = 4 ,000 m2 < < < 1 /4th
of ar e a r e q d. by L am el la Clar i fier > >>
? Client : ? Location : ? Objective : ? Raw water source : ? Treatment Line :
? Aqua D AF
De sign Perfo r man ce
Plant treat ment c apac ity Raw water quality (turbidity ) Water los s Treated water quality (turbidity) Longer Filter runs
Aqua DAF
600 MLD 20 NTU (90%iles ), 100 max . < 5 NTU (ty pic ally < 2 NTU) -
Ove rall Plant
600 MLD < 2% < 0.5 NTU 72 hrs (3 days)
? Comm ission ing
? Main driv ers in technolog y selecti on
- Highly Rocky Terrain, hence small footprint for fast & opti mum construction cost - Low turb idity water, but with spikes - Light solids , requiring high chemical consumption for clarification by settling - A lgae , inc idental inc reas e in algae in raw water affec ting the fil ters - Direct Fi ltration mode operation when Turbidity < 5 NTU (to op timise OP EX)
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :1 3
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :1 4
? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
AquaDAF ? Water Clarif ier
TK Halli WTP, Bangalore – Project Fact Sheet
Aqu az u r V Rapid Grav ity S an d Filte rs (24 u n its)
? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
AquaDAF ? Water Clarif ier
Photo Gallery
Battery of AquaDAF
AquaD AF (10 un its)
Cascade ae rator
Flash Flash Mixe r Mixe (2 se rts)
S lu dg e Th ick e n e r, De wate rin g Bu ildin g
Parsh al Flu me
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :1 5
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :1 6

? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
AquaDAF ? Water Clarif ier
– Photo Gallery
? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
AquaDAF ? Water Clarif ier
– Photo Gallery
Air-wat er sat ur at or False flo or
Uniform Air Blanket: Milky appearance
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :1 7
Nozzle s fo r micr ob ubl es pr od ucti on
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :1 8
? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
AquaDAF ? Water Clarif ier
– Photo Gallery
? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
AquaDAF ? Water Clarif ier
– Photo Gallery
Floating Sludge Formation
Clarified Water under Floating Sludg e
Floa ting Slu dg e
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :1 9
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :2 0
Hydr aulic De slu dgin g

? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
Thank you...
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :2 1
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :2 2
? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
AquaDAF ? Water Clarif ier
Key to High-Rate Operation + Speci al False Floor = High-R ate Aqua DAF Clarifi er
? ? ? ? ? ? ?
HEAD WORKS BIOLOGY SEPAR ATIO N ME MB RANE DISIN FEC TION BIOSOL IDS REUSE
AquaDAF ? Water Clarif ier
Key to High Rate Operation
CFD M o del
DAF S yst e m
Special False Floor:
? ? Irregular hole pattern Headloss across floor creates a circular flow pattern within basin Introducing flow resistance to create uniform flow distribution Highly c onc entrated bubble bed main tained within f loat area Enhanced c oalescing of s ludge High clarification rates: 25 to 40 m3 /m2/hr
?
?
As loadin g r ate o n a co nvent ional system incr eases t her e is a tende ncy f or shor t-cir cuit ing a nd bubb le bla nket ex pansi on. This can lead to s olids c ar r y over .
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :2 3
In AquaDAF, a special false floor is constr uc ted (Plastic/wo ode n panels) w ith a special hole patter n. It intr od uces flow r esistance an d pr om otes unif or m flow dis tr ibuti on.
?
Headloss acr oss the floor cr eates a cir cular flow pa tter n. T he hi ghly concen tr ated b ub ble bla nket i s m aintained i n th e floa t ar ea at r ates of 20 m 3 /m 2 //hr and higher .
?
Wa te r In d ia 20 1 1 (De l h i) Sl d i e :2 4