El Manantial 63 February 2016 (F3)

El Manantial
Fundación Centro Canario del Agua (Since 1999)
www.fcca.es
Nr. 63, February 2016
On the performance of DrinTec™ products in mega-projects
A new 384.000 m3/d remineralization plant comes into operation
During the past year a new remineralization plant for 384.000 m3/d with a blend of 53% of treated flow and 47% permeate,
came into operation. From the performance test the following has been concluded:
•
•
pH
BICARBONATE
8.5
200
180
8.4
160
8.3
140
120
8.2
Container 4
8.1
LAB
8
Bicarbonate (ppm)
•
•
The data show a very high efficiency of
CO2 consumption above 98%.
Turbidity remains below 0.5 NTU.
PH, Alkalinity and Hardness follow the
expected values and according to the dose
of CO2, NaOH and permeate water quality
characteristics.
LSI values stay always positive.
In general, the process is very stable and
water quality parameters stayed constant
and under control throughout the test
periods.
pH
•
80
LAB
60
40
7.9
20
7.8
22-Nov
0
27-Nov
2-Dec
7-Dec
12-Dec
17-Dec
22-Dec
27-Dec
22-Nov
27-Nov
2-Dec
7-Dec
Date
TURBIDITY
100
0.45
90
0.4
80
0.35
70
22-Dec
27-Dec
60
0.25
Container 4
0.2
LAB
Calcium (ppm)
Turbidity (NTU)
17-Dec
CALCIUM
0.5
50
40
0.15
30
0.1
20
0.05
LAB
10
0
22-Nov
12-Dec
Date
0.3
From these lines our thanks to Sadyt, S.A. for
selecting DrinTec™ and especially to engineers
Aitor Díaz, Rafael Buendía, Carlos García-Soto,
Fernando Donate, José Luís P. Talavera, and
Alberto Morales for their continued support
throughout the project.
100
00
27-Nov
2-Dec
7-Dec
12-Dec
17-Dec
Date
22-Dec
27-Dec
22-Nov
27-Nov
2-Dec
7-Dec
12-Dec
17-Dec
22-Dec
27-Dec
Date
FCCA continues to respond to market demands
The adjacent graph quantifies the historical evolution of the
developments of FCCA. In recent years there has been a
quantum leap similar to what occurred between 2006 and
2008. Small research and development applied to each case
have yielded new developments related to devices for
filtering floors and process design of remineralization plants
with calcite beds and partial treatment. Having increased the
capacity of projects of dimensional flow simulation and
analysis, together with 3D printed scale models, have also
greatly helped in understanding the problems and finding the
best solutions.
25
Number of new developments in FCCA
Small research projects mature
into new developments
20
15
10
5
0
2000 2002 2004 2006 2008 2010 2012 2014
Strategy matters
Few people would argue that we live in mega-diverse
markets, where very, very specialized companies and
services thrive.
This perception of our present society, inspired by the
diversification of species found in tropical forests, has
been an FCCA maxim throughout the years: Carrying out
very unique research to expand our knowledge around a
certain area of speciality.
This is because, in most markets there is a huge premium
in only offering exactly what you do best.
This successful remineralization project for 384.000 m3/d
represents a positive backing to our strategy.
FCCA research brings results
Page 1
New DrinTec ™ product
Large contactors
As indicated in our previous issue of El Manantial,
a new project has enabled FCCA to develop
innovative interior solutions in plastics suitable for
large remineralization tanks with continuous
feeding system. As shown in the accompanying
picture, tanks are already at an advanced stage of
manufacture. Each tank will be able to treat
between 6,000 and 9,000 m3/d. From these lines
we would like to thank Acciona Agua for selecting
our design and also to Iratxe Montoya and Jose
Andres Bidarrauzaga of the Engineering
Department in Bilbao, for their continuous support
during our work.
Simulations techniques
Fluid dynamics in
blending tanks
The design and characteristics of mixing tanks for
plants with partial remineralization treatment have
recently been studied by using mathematical
simulation of fluid dynamics. The program allows
to visualize the different currents velocities within
the tank with illuminating results.
Considering the limited space available for the
mixing tank, the simulation has allowed setting
with some guarantee optimum distribution of the
inlets in order to facilitate mixing.
Improving performance of remineralization plants
A mini-bypass for stabilizing overall flow during tank
backwashing
Occasionally, it is required to perform backwashing of one
single remineralization unit while leaving the rest in operation.
This implies closing the inlet valve of the specific tank for
injecting the backwash water or air wash and sponge the calcite
bed. During this period the flow to remaining units increases by
the amount corresponding to that of the closed tank.
To prevent this increase in flow, we have designed a minibypass which connects the inlet pipe directly with the treated
water pipe with exactly same head loss as the calcite bed that
has been removed from operation. In this way and during the
duration of the backwash operation, working units maintain the
same surface velocity preventing elutriation of fines in the beds.
This bypass is also useful in combination with the normal
bypass valve to control with more precision the impact of the
sudden increases in flow to the plant.
mini-bypass
Page 2
Useful data for engineers
Procedure and water volumes for backwashing calcite beds
during start-up
Therefore a conversion to actual volume of water
(m3) is desired. Pore volume is a term usually
employed in soil science to define the void space
within the particles in a soil profile. Pore volume
depends on particle size, however for calcite beds
with 1-4 mm diameter particles it represents
approximately 50% of the total bed volume.
Figure 1 translates the values of Table 1 to volume by
using pore volumes and time. The exact water
volume will depend on bed volume.
Figure 2 shows an estimate to turbidity (NTU) versus
the number of pore volumes during backwashing.
Table 1: Standard backwashing procedure
Water at 30 - 32 m/h
Air at 70 - 80 Nm3/h and m2
Water at 30 - 32 m/h superficial velocity
Water at 10 - 15 m/h superficial velocity
5 min
3 min
10 min
≈ 45 min
Fig.1: Calcite bed pore volumes for bed washing cumulative
(Pore volume ≈ 50% of bed volume)
9,0
8,0
number of pore volumes
The standard procedure for backwashing calcite beds
during start-up is shown on the adjacent table. Flow is
indicated in terms of superficial velocity (m/h).
7,0
6,0
5,0
4,0
3,0
2,0
1,0
0,0
0
10
20
30
40
50
60
Times (minutes)
Fig.2: Evolution of turbidity (NTU) during backwash (estimated)
50,0
45,0
40,0
Turbidity (NTU)
35,0
30,0
25,0
20,0
15,0
10,0
5,0
0,0
0,0
1,0
2,0
3,0
4,0
5,0
6,0
7,0
8,0
9,0
Calcite bed pore volume during backwash
Elmasa Water Technology and GE Water&PT select DrinTec™ for his new plant
A multi-tank remineralization plant for Maspalomas-2
Elmasa Water Technology in
association with GE Water & PT
have selected DrinTec™ technology
for
the
upgrade
of
the
remineralization
plant
of
Maspalomas 2 (19.500 m3/d) The
fact that Elmasa’s Maspalomas-1
plant (5,000 m3/d) has been working
flawlessly for more than 4 years has
been decisive in their decision.
The plant will include one CO2 low
pressure dissolver and 13 tanks
Ø2210 mm and 5700 mm height.
Bed height will be 3,370 mm. The
CO2 dissolver is not shown in the
attached layout.
Layout of the remineralization plant of Maspalomas-2
Page 3
Presenting the advances of FCCA
Conferences in Las Palmas and
Barcelona
On 15th september 2015, in Las Palmas, Canary Islands, Dr. Manuel Hernández
participated in a specialized seminar on water quality, giving a talk on the
influence of remineralization on drinking water quality and chlorination. The
seminar was organized by the Technlogical Institute of the Canaries (ITC)
2a
Inves
e inn
de c
3rd,
On December
2015, ATLL distribution company of the Greater Barcelona
Area, in collaboration with the Generalitat of Catalunya, organized a
conference on R&D around drinking water problems. More than 300 people
attended the meeting to present and share programs, studies and R&D of
companies related to the treatment of drinking water.
From these lines FCCA would like to thank ITC and ATLL for their invitation.
3 de noviembre de 2015
Support from FCCA
Funding
education and
training programs
FCCA has approached the two
main Universities of the Canary
Islands for donating a license of
Water!Pro™, the water treatment
program of Schott Engineering,
California, U.S.A.
FCCA will also use this program to
teach young professionals how to
compare simulated and field results
of remineralization plants.
Water!Pro™ allows modeling and
plotting of chemical dosage,
alkalinity, pH, lead and copper,
buffer
intensity,
aggressive,
Langelier, CCPP and Ryznar
indices,
also
coagulation,
disinfection and other chemical
processes such as chlorination. It
Objetivo: A
y la Agèn
encuentro
de I+D+i
agua pot
to hídricos d
el servicio
offers modeling for blending up
six source waters; counter current
packed tower modeling program
for stripping VOC, hydrogen
sulfide, ammonia and CO2. It
provides modeling of downward
08:30
Recepción
spray aeration for the reduction of
– 09:15
TTHM compounds in09:00
clear
wells Inauguració
CEO de Ac
and storage tanks and a modeling
09:15 – 09:25
program for precursors
of THM´s, Apertura de
09:30
– 11:15 and Ponencias –
HAA6 & CH) in raw
water
distribution system. 09:30 – 10:00
Ponencia in
The surprising outcomes of evolution
The unimaginable structure of snail
shells
The white lipped snail (Cepaea hortensis) is often found in gardens.
The shell is made of lime. The picture shows the layers of the snail
shell in a fraction. On the top, which is the inner wall of the shell,
formation of new crystal platelets can be seen.
Scanning electron microscope, 2500:1 (at 15x13cm)
Eye of Science
Meckes & Ottawa GbR;
August-Lämmle-Str. 43; 72766 Reutlingen, Germany.
eye@eyeofscience.com
Prof. Mario
Catedrático
10:05 – 10:25
Dr. Fernan
10:30 – 10:50
Dra. Marin
del departa
10:55 – 11:15
Sr. Francis
11:15 – 11:45
Pausa café
11:45 – 13:25
Ponencias –
11:50 – 12:10
Sr. Enrique
Agència Ca
12:15 – 12:35
Sr. Manuel
12:40 – 13:00
Dr. Héctor
13:05 – 13:25
Dra. Elisa B
Institut de C
13:30 – 14:00
Ponencia d
Sr. Pau Ga
14:00 – 14:15
Clausura de
Departamen
CONTACT DETAILS
Editor: Manuel Hernández, Ph.D., M.Sc., Dipl.Ing.
Fundación Centro Canario del Agua; Calle Isla de Lanzarote 18; 38400 Puerto de la Cruz; Canary Islands, Spain
Tel: +34 922 298664; e-mail: administracion@fcca.es; http://www.fcca.es; http://www.drintec.com
Note: DrinTec™ is the trademark for FCCA developed products.
Page 4