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Subsurface Intake Technologies
Neodren®
Anthony T. Jones, PhD
© 2016 Anthony T. Jones
Leave the fish in the sea ™
Design Rationale
Provide a reliable source of seawater
at the required quantity and quality
Lowest Total Water Cost over the lifetime of the project (CAPEX, OPEX)
Environmental issues typically associated with intakes (Impingement and Entrainment)
Installation Procedure
4
Seabed HDD machinery
Productive section of drain Cementing (sealing) of annular space
End cap
Multiple Lateral Drains
Neodren® Systems in Spain
San Pedro del Pinatar – ITAM San Pedro
Águilas – Cabo Cope
Roses – Girona
Valencia - Albuixech
Águilas – Regantes La Marina
St Pere Pescador – Girona
Alicante – ITAM Canal de Alicante I y II
Barcelona – El Prat de Llobregat
Águilas – Regantes de Aguilas
El Prat de Llobregat - CRAM
La Tordera – Girona
Neodren® intakes at operating seawater
desalination facilities
Location in Spain
Year
No. Lateral Drains
Filter Section
(ft)
Plant Capacity (MGD)
San Pedro del Pinatar 2003 20 14,911 21.9
Cabo Cope 2004 4 1,993 9.9
Águilas 2006 3 2,530 7.8
Tordera 2007 1 670 1.8
Alicante II 2008 8 8,530 21.9
Benefits
• Overall lower life-cycle costs
• Lower energy costs
• Less complex pretreatment design
• Higher quality feedwater for RO system – SDI, TSS, microbial activity, TOC,
• Small environmental footprint – No impingement
– No entrainment
– No mitigated costs for fish mortality
Engineering Study
9
San Pedro del Pinatar
• Year: 2003 • Client: PRIDESA - ABENGOA • Ф 355mm (13.97 in.) • Total length: 9190.7m (30,150 ft.) • Filter length: 4545m (14,900 ft.) • Geology: permeable fractured rock material • Total capacity: 2000 L/s (31,700 gpm) • Specific capacity: 0.44 L/s/m (2.12 gpm/ft) • Number of drains: 20
10
Source: Malfeito, J. & Jimenez, A. (2005)
“The SDI before the sand filters is below 4...”
Source: Malfeito, J. & Jimenez, A. (2005)
“…and the turbidity is below 1.5 NTU” (before sand filters)
Águilas, Murcia, Spain
Client: Comunidad de Regantes de Águilas Tube Ø: 400 mm (15.75 in.) Length: 1495 m (4905 ft.) Filter section: 771 m (2530 ft.) Geology: Calcarenite and conglomerate Flow Rate per drain: 119 l/s (1886 gpm) Total Flow Rate: 345 l/s (5468 gpm) Specific Flow Rate: 0.44 l/s/m (2.11 gpm/ft). Number of drains: 3 Executed: March 2006
Performance Data
Drain 1 Drain 2 Drain 3
Total length (m) 447 530 533
(ft) 1467 1739 1749
Filter length (m) 201 286 286
(ft) 659 938 938
Pipe diameter (mm) 400 400 450
(in) 15.75 15.75 17.72
Data courtesy Comunidad de Regantes de Águilas
Data courtesy Comunidad de Regantes de Águilas
951 gpm
1.4 MGD
1535 AF/YR
Data courtesy Comunidad de Regantes de Águilas
1.2 gpm/ft
La Tordera
Client: Agència Catalana de l’Aigua
Tube Ø 450 mm (17.7 in.)
Length: 450 m (1476 ft.)
Filter section: 204 m (669 ft.)
Geology Medium sand
Flow Rate per drain 80 l/s (1268 gpm)
Specific Flow Rate 0.36 l/s/m (1.7 gpm)
Number of Drains 1
Executed July 2007
Bacteria Analysis at La Tordera (Spain)
Parameter Values
Avg. Min. Max.
Coliform Bacteria
(ufc/100 mL) SW 21 2 80
NF 0 0 1
E. Coli
(ufc/100 mL) SW 18 1 >50
NF 0 0 0
Aerobic count
22° (ufc/mL) SW 24 2 65
NF 6 <2 37
SW is seawater and NF is Neodren Filtrate
Pilot Plant Testing July 2007 to February 2008
Cala Gogo – Barcelona
Year: 2005 Client: ATLL Aigues Ter Llobregat 180 mm (7 in.) 315 mm (12.40 in.) 355 mm (13.97 in) Total length: 835.9m (2742 ft.) Filter length: 204 m (669 ft.) Geology: fine sand Capacity 355mm: 90 L/s (1427 gpm) Specific capacity: 0.44 L/s/m (2.1 gpm) Number of drains: 4
22
Cala Gogo
Date Seawater Neodren filtrate
02 Aug 2007 35 5
06 Aug 2007 33 6
09 Aug 2007 38 5
13 Sep 2007 86 6
26 Sep 2007 28 6
25 Oct 2007 27 3
Mean + S.D. 32 + 5.4 5.2 + 1.2
Total Suspended Solids mg/L
(measured gravimetrically)
Source: Peters (2009) personal communication email 17 Jan 2009
23
Cala Gogo
24
Silt Density Index
Sea 18.6
(SDI5) 18.8
(SDI5) SDI1 to
high 18.65 (SDI5)
66.1 (SDI1)
Neodren® 5.39 (SDI15)
5.64 (SDI15)
5.66 (SDI15)
5.95 (SDI15)
5.8 (SDI15)
Turbidity (NTU)
Sea 5.5 4.68 5.45
Neodren® 1.2 1.4 0.5
Total Organic Carbon (TOC) (mg/L)
Sampling Day SW NF Reduction
(%)
14-Mar 3.42 1.36 60.2
29-Mar 2.05 1.52 25.9
26-Apr 1.67 1.60 4.2
3-May 1.68 1.35 19.6
18-May 1.75 1.59 9.1
x̅ 2.11 1.48
σX + 0.75 + 0.12
Source: Peters and Pintó, (2006)
Investigation drain ATLL Barcelona
Summary
• A technology for executing seawater intakes by means of horizontal directional drilling drains installed below the seabed
• The output is low-turbid water that can be used for desalination plants.
• 22,300m of Neodren Intakes
(73,200 ft 13.8 miles)
Contact
Anthony T. Jones, PhD
Intake Works LLC www.IntakeWorks.com
[email protected] @IntakeWorks (916) 990-3699
