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DESMI Ocean Guard - Ballast Water Treatment Systems
DESMI Pumps & Systems
integrate
knowledge & technology
2
More than two-third of the globe is covered by wa-
ter.
Water is a condition of life and all areas of the
oceans have their own unique ecosystems that have
developed in different directions since the dawn of
time.
Since we began using ships to transport goods, bal-
last has been a necessity. In the beginning stones
were used as ballast, but since the introduction of
steel ships and the possibility of integrating tanks,
seawater has been used as ballast medium.
Concurrently with the increasing world trade be-
tween the individual countries and continents mil-
lions of cubic metres of water have been “moved”.
These large quantities of water containing micro-or-
ganisms have been mixed in the different habitats,
which has had hazardous consequences for the local
maritime ecosystems.
The IMO convention for control and management
of ships’ ballast water stipulates that vessels must
remove all living organisms from the ballast water
before emptying the water into the ocean.
This necessitates the use of a ballast water treat-
ment system that purifies the ballast water when
the ballast water tanks are filled and again when
they are emptied.
DESMI A/S has joined forces with leading players
and developed superior in all aspects a ballast water
treatment system: DESMI Ocean Guard.
Ships have various demands for ballast operation.
Therefore, DESMI Ocean Guard has developed two
solutions:
• Low pressure system
• Pressurized system
A typical way of filling the ballast water tanks is to
open the various valves and let the sea water flow
into the tanks (gravity filling). When the ballast
tanks are almost filled, the ballast pumps are put
into operation until ballast water flows from the
valves on the air-head pipes on open deck. This
means that the tanks are filled and that there are
no free-moving surfaces that can affect the stability
of the vessel.
Gravity filling is possible with DESMI Ocean Guard
when using a non-pressurized filter. As such a non-
pressurized filter takes up more space than a pres-
surized filter. This solution is mainly intended to be
used in new-buildings. See fig. 1 page 5.
It is also possible to fill the ballast tanks by means
of ballast pump(s) and a pressurized filter. This filter
takes up very little space compared to its capacity
and it is therefore suitable for retrofit solutions, but
of course also for new-buildings. See fig. 1 page 5.
One of the features of DESMI Ocean Guard is
the comparatively low energy consumption (10
kW / 100 m3 treated water) and the low mainte-
nance costs. The life time of wear parts is typically
>12,000 hours.
DESMI Ocean Guard is designed as a full automatic
system with a very simple man/machine interface.
Introduction to DESMI Ocean Guard Ballast Water Treatment System
3
Benefits of the DESMI Ocean Guard Ballast Water Treatment System is:
• Cost effective water treatment
• Well proven technology
• Low operational costs
• Developed according to IMO and US rules
• Simple installation
• Minimum footprint
• Simple operation
• No chemicals added
• Long lifetime UV lamp >12,000 h
• Filtration of sediments
• UV dosage
• Pressurized system
• Low-pressurized system
• Possibility for ballasting by gravity
MEE
TS
THE REQUIREMENTS FRO
M IM
O A
ND
THE US BALLAST WATER REGULA
TIONS
PROVEN TECHNOLOGY
4
Filtration System
Filter for pressurized systems is available in sizes ranging from
40m3/h to 5400m3/h.
Filter for Low-Pressure Systems
Available in sizes up to 3600m3/h.
UV Reactors
Are the core component in the system. Each
unit measures approx. 300x300x2000 and is
capable of treating approx. 133m3/h by pres-
surized system. For low-pressure system the
capacity is 200 m3/h. The reactors is stacked
in up to six units giving a capacity of 800m3/h
per stack.
For bigger system more stacks are added
operating in parallel.
Main Components Forming the System
Complete Overview
The system is controlled via a touch screen and mimic pictures providing complete overview of the system
incl. each component in the system.
Logging of events, alarms etc. is also included.
5
M
M MM M 4-20MA
BALLAST WATER TREATMENT SYSTEM CONTROL CABINET
19 x
0,7
5mm
² MP
RX
19 x
0,7
5mm
² MP
RX
19 x
0,7
5mm²
MP
RX
24 x
2 x
0,7
5mm
² TC
X (1
)
1 x
2 x
0,75
mm
² TC
X(1
)
2 x
2 x
0,75
mm
² TC
X(1
)
3 x
4mm
² MP
RX
3 x
6mm
² MP
RX
37 x
1,5
mm
² MP
RX
2 x
2 x
0,75
mm
² TC
X(1
)
1 x
2 x
0,75
mm
² TC
X(1
)
3 x
1.5m
m² M
PR
X
4 x
2 x
0.75
mm
² TC
X(1)
STA
RT/
STO
P/R
UN
SIG
NA
L 7
x 1,
5mm
² MP
RX
3 x 2,5mm² MPRX
3 x 2,5mm² MPRX
MAIN SWITCH BOARD SHIP AUTOMATION SYSTEM
POWER MANAGEMENT SYSTEM
EX
ISTI
NG
CA
BLE
EX
ISTI
NG
CA
BLE
37kW
MOTOR STARTER B.W P/P
FT
I.S. BARRIER
4 x
2 x
0.75
mm
² TC
X(1)
BA
CK
FLU
SH
MO
TOR
DIF
FP
RE
SS
UR
E
2 x
2 x
1,0m
m²
2 x
2 x
1,0m
m²
1 x
2 X
1,0
mm
²
1 x
2 X
1,0
mm
²
37 x
1,5
mm
² MP
RX
37 x
1,5
mm
² MP
RX
37 x
1,5
mm
² MP
RX
37 x
1,5
mm
² MP
RX
37 x
1,5
mm
² MP
RX
3 x
4m² M
PR
X
START AIR COMPRESSOR # 1
START AIR COMPRESSOR # 2
7 X
1,5
m² M
PR
X
7 X
1,5
m² M
PR
X
I.S. BARRIER
I.S. BARRIER
I.S. BARRIER I.S. BARRIER
2 x
2 x
0,75
mm
² TC
X(1
)
I.S. BARRIER
2 x
2 x
0,75
mm
² TC
X(1
)
I.S. BARRIER I.S. BARRIER
HYDRAULIC POWER STATION
M 4-20MA
1 x
2 x
0,75
mm
² TC
X(1
)
2 x
2 x
0,75
mm
² TC
X(1
)
FT
7 x
1,5m
m² M
PR
X
3 X
1,5
mm
² MP
RX
24 x
2 x
0,7
5mm
² TC
X (1
)
3 x
35m
m² M
PR
X
I = 9
5 A
mp.
I = 2
2 A
mp.
I = 3
0 A
mp.
18kW 13,2kW
BA
LLA
ST
WAT
ER
PU
MP
806-
01
PT1
00 S
EN
SO
R
806-
06
PR
ES
SU
RE
TR
AN
SM
ITTE
R
806-
08
BO
LL &
KIR
CH
FIL
TER
80
6-02
FLO
W M
ETE
R 8
06-1
0
UV
RE
AC
TOR
# 1
806
-11
PT1
00 S
EN
SO
R
806-
07
PR
ES
SU
RE
TR
AN
SM
ITTE
R
806-
09
UV
RE
AC
TOR
# 2
806
-12
UV
RE
AC
TOR
# 3
806
-13
UV
RE
AC
TOR
# 4
806
-14
UV
RE
AC
TOR
# 5
806
-15
UV
RE
AC
TOR
# 6
806
-16
WA
STE
WAT
ER
P/P
806
-20
OZO
NE
INJ.
P/P
806
-04
OZO
NE
DE
STR
UC
TOR
80
6-18
UV
SE
NS
OR
@ R
EA
CTO
R #
1
UV
SE
NS
OR
@ R
EA
CTO
R #
2
UV
SE
NS
OR
@ R
EA
CTO
R #
3
UV
SE
NS
OR
@ R
EA
CTO
R #
4
UV
SE
NS
OR
@ R
EA
CTO
R #
5
UV
SE
NS
OR
@ R
EA
CTO
R #
6
MO
D V
/V 8
06-4
1v
MO
D V
/V 8
06-4
1vFE
ED
BA
CK
SIG
NA
L
MO
D V
/V
MO
D V
/V
FEE
D B
AC
K S
IGN
AL
FLO
W M
ETE
R
AIR
DR
YE
R/
FILT
ER
H
H H
H H
H H
M
M
ENGINE ROOMSWITCH BOARD & CONTROL PANEL
MAN/MACHINE INTERFACE (MMI)806-19
POWERMANAGEMENT
SYSTEM
SHIPS ALARM& CONTROL
SYSTEM
HYDRAULICCABINET FOR
REMOTE VALVE
FROM STARTINGAIR SYSTEM
AIRDRYER
OPENDECK
DN20
TE
PT
806-58v
8/1 barPRESSURE
CONTROL VALVE
DN250
AIR PRESSURE CONTROL VALVE
BUTTERFLY VALVE
BUTTERFLY VALVE REMOTEOPERATED
BUTTERFLY VALVEMODULATION OPERATIONREMOTE OPERATION
AIR SAFETY VALVEFLOW METER
OZONE INJECTOR
NON RETURN VALVESCREW DOWN CHECK GLOBE VALVE
PRESSURE TRANSMITTER
TEMPERATURE TRANSMITTER
U.VSENSOR
U.VSENSOR
45V50V
DN
150
DN
150
DN
150
DN
150
57V 52V
DN250
DN20
TOTAL6 PCS.
DN250
DN100
40V 39V
806-05806-04
806-41V806-59V
DN250
DP
FILTER
PI
FT
H
H TE
TIPT
HH
H
H
H
TE
PT
PI
H
H
E8
AE
-100
G
SD
-4D
G
AE
-100
GE
8
WB-2P
E8
WB-23P
WB-4P
WB-25P
WB-6PWB-8P
WB-27PWB-29PWB-31PWB-33P
WB-22P WB-10PWB-12PWB-14PWB-16PWB-18PWB-20P
WB-24P
WB-3P
WB-26PWB-28PWB-30P
WB-21P
WB-32P
WB-17PWB-19P WB-13PWB-15P WB-9PWB-11P WB-5PWB-7P
AE
-125
E8
SD
-50E
8S
D-5
0E
8
SD
-50E
8S
D-5
0E
8
SD
-50E
8S
D-5
0E
8
SD
-50E
8S
D-5
0E
8
2V3V4V5V6V
7V8V9V
10V11V
WB-125WB-125WB-125WB-125WB-125
WB-125WB-125WB-125WB-125
WB-1P
WB-125E8
WB-125E8
E8E8E8E8
E8E8E8E8E8
No.5 W.B.T. (P&S) No.4 W.B.T. (P&S) No.3 W.B.T. (P&S) No.2 W.B.T. (P&S) No.1 W.B.T. (P&S) F.P.T
1V
(250)
(250)18V
19V250 DN
L.W.L
ALL VALVES FOR WATER BALLAST SYSTEMIN BALLAST PUMP ROOM SHALL BE OPERATEDMANUALLY AT VALVE SIDE
TO CARGO OIL SHORE-CON HEADER (S)
42V (IN COFFERDAM)(S)
TO FIRE/BILGE P/P
DN250
DN200
DN250
WB-34P
16V
13V
14V
DN250
DN250
DN80
36V35V
18V
17V
15V
37V
38V
43V
PIB/WP/P
807-07
809-73V806-09
806-20
806-21
806-02
806-06806-08
806-10
806-01
12V
M
30/8 barPRESSURE
CONTROL VALVE
To Drain
M
M
H
65m³/H5 bar
80m³/H3 bar
400m³/H2 bar
TI
PAL/H
PAL/H
TIAL/H
HIAL/H
PUMP
OPENDECK
806-18
BALLASTWATER TANKS
PUMP ROOMFR. 31- 34
ENGINE ROOM
FT
806-59v
79V
51V
44V
78V
80V
41V
806-81
806-22
H
82V
H 81VPI806-21
Typical System Drawings
6
Pressure
Filter
1
LEGEND:
VALVE WITH
ACTUATOR
FLOW METER
BLOWER/COMPRESSOR
SPIGOT
PUMP
NON-RETURN VALVE
TF TEMPERATURE SENSOR
FLOWMETER WITH SWITCH
LIACMANOMETER 4-20
ma
BALLAST WATER LINE
AIR
OZONE
INJECTOR
UV
units
Air Filter
TRO sampler
Redox sensor
Ozone
Redox
Temperature
Conductivity
pHTRO sampler
PPRESSURE SENSOR
MODULATING VALVE
M
Ballast
water tank
UV sensor 1
Mea
surin
g
cham
ber
Sea/
Harbor
WASTEWATER LINE
M2
UV sensor 2
UV sensor 3
UV sensor 4
UV sensor 5
UV sensor 6
SAFETY AIR VALVE
3
Pressure
release
valve
Pressure less
Filter
P1
M1
P2
2
Sea/
Harbor
Sea chest
Ø300
PE Ø300
RS Ø254x2.0
RS Ø254x2.0
RS Ø254x2.0
Ø150
Ø150
Ø150
Ø150
Ø150
Ø150
Ø150
Ø150
Ø150
Ø150
Ø150
Ø150
Ø250
Ø250
Ø250
RS Ø204x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø204x2.0
RS Ø254x2.0
PE Ø250
Ø250
Ø100Ø100
Ø100
Ø100
RS Ø104x2.0
V2
V9
V8
V1
V23
V22
V16
V17
V18
V19
V20
V21
V10
V11
V12
V13
V14
V15
V27
V4
V5
Ø300V3
The system used in the final approval has a
capacity of treating 400 cubic meters of water
per hour.
The system consists of the following parts:
• Filter, for removing particles, zooplankton and
large algae
• UV lamps, for generating photolytic inactivat-
ing light and photochemical ozone generating
light
• Ozone injector system, for injection of gener-
ated ozone into the ballast water flow
BWMS 400-P40 – system: For the base configu-
ration, where space is a limiting factor, a pressu-
rized filter will be used. This filter will use a mesh
with a pore size of 40 micron. It will typically be
installed right after the ballast pump.
As shown in Figure 1, the filter removes particles
in order to secure the efficiency of the succeed-
ing disinfection step. It is only the incoming bal-
last water which will pass the particle filter, i.e.
de-ballasted water is pumped directly into the
succeeding process units.
In the first step of the succeeding treat-
ment process the water flows to the combined
UV-reactor, which also generates ozone used in
the second step of the treatment process. The
UV reactor exposes the water to a high dose of
UVC irradiation from low pressure UV-lamps.
In the second step of the succeeding treatment
process, the water passes a venturi injector. The
vacuum created by the venturi injector sucks
dry atmospheric air through the ozone generat-
ing components via a pipeline to the injector for
mixing with the water. When water is pumped
through this unit, it injects ozone containing air
and performs complete mixing of air and water.
During the further flow through the piping sys-
tem the water and air/ozone mixture will allow
the gaseous ozone to diffuse into the water
phase and react with the organisms. Based on
the relatively small ozone quantities used, the
ozone concentration will be zero a short period
after the injection. For extra safety reasons the
off-gas will pass an ozone destructor before
exhaust to the atmosphere.
Finally, the treated water is directed to the bal-
last tanks.
Technical Description of the DESMI Ocean Guard Ballast Water Treatment System BWMS 400-P40
PressureFilter
1
LEGEND:
VALVE WITH ACTUATOR
FLOW METER
BLOWER/COMPRESSOR
SPIGOT
PUMP
NON-RETURN VALVE
TF TEMPERATURE SENSOR
FLOWMETER WITH SWITCH
LIAC MANOMETER 4-20 ma
BALLAST WATER LINE
AIR
OZONE
INJECTOR
UV
units
Air Filter
TRO samplerRedox sensorOzone
RedoxTemperatureConductivitypHTRO sampler
P PRESSURE SENSOR
MODULATING VALVEMBallast
water tank
UV sensor 1
Mea
surin
gch
ambe
r
Sea/Harbor
WASTEWATER LINE
M2
UV sensor 2
UV sensor 3
UV sensor 4
UV sensor 5
UV sensor 6
SAFETY AIR VALVE
3
Pressure release
valve
Sea/Harbor
Sea chest
Ø300
PE Ø300
RS Ø254x2.0
RS Ø254x2.0
RS Ø254x2.0
Ø150
Ø150 Ø150 Ø150 Ø150 Ø150
Ø150 Ø150 Ø150 Ø150 Ø150
Ø150
Ø250
Ø250
Ø250
RS Ø204x2.0
RS Ø168x2.0
RS Ø168x2.0
RS Ø168x2.0
RS Ø168x2.0
RS Ø168x2.0
RS Ø168x2.0
RS Ø168x2.0
RS Ø168x2.0
RS Ø168x2.0
RS Ø168x2.0
RS Ø168x2.0
RS Ø168x2.0
RS Ø204x2.0
RS Ø254x2.0
PE Ø250
Ø250Ø100
Ø100
Ø100
Ø100
RS Ø104x2.0
V2
V9
V8
V1
V23
V22
V16 V17 V18 V19 V20 V21
V10 V11 V12 V13 V14 V15
V27
V4
V5
Ø300
V3
7
Pressure
Filter
1
LEGEND:
VALVE WITH
ACTUATOR
FLOW METER
BLOWER/COMPRESSOR
SPIGOT
PUMP
NON-RETURN VALVE
TF TEMPERATURE SENSOR
FLOWMETER WITH SWITCH
LIACMANOMETER 4-20
ma
BALLAST WATER LINE
AIR
OZONE
INJECTOR
UV
units
Air Filter
TRO sampler
Redox sensor
Ozone
Redox
Temperature
Conductivity
pHTRO sampler
PPRESSURE SENSOR
MODULATING VALVE
M
Ballast
water tank
UV sensor 1
Mea
surin
g
cham
ber
Sea/
Harbor
WASTEWATER LINE
M2
UV sensor 2
UV sensor 3
UV sensor 4
UV sensor 5
UV sensor 6
SAFETY AIR VALVE
3
Pressure
release
valve
Pressure less
Filter
P1
M1
P2
2
Sea/
Harbor
Sea chest
Ø300
PE Ø300
RS Ø254x2.0
RS Ø254x2.0
RS Ø254x2.0
Ø150
Ø150
Ø150
Ø150
Ø150
Ø150
Ø150
Ø150
Ø150
Ø150
Ø150
Ø150
Ø250
Ø250
Ø250
RS Ø204x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø168
x2.0
RS Ø204x2.0
RS Ø254x2.0
PE Ø250
Ø250
Ø100Ø100
Ø100
Ø100
RS Ø104x2.0
V2
V9
V8
V1
V23
V22
V16
V17
V18
V19
V20
V21
V10
V11
V12
V13
V14
V15
V27
V4
V5
Ø300V3
What Do We Clean The Ballast Water For?
Below you will find some examples of aquatic bio-invasions causing major impact, but there are hundreds
of other serious invasions which have been recorded around the world:
The Mnemiopsis Leidy, introduced to the Black and Azov Seas in the early 1980s has
wiped out the anchovy and sprat fisheries causing a loss in the region of US dollars
200 mill. annually. This invader has now established itself in the Caspian Sea and is
causing concern even in the Baltic Region.
The Mitten Crab (Eriocheir Sinensis) became established in the San Francisco Bay
in the 1990s and is now found in densities exceeding 10,000 individuals per square
metres.
The Northern Pacific Starfish was introduced to Australia by ballast water from
Japan in the early 1980s causing severe damage to aquaculture and fishing indus-
tries and proving impossible to eradicate. The invasion has had a major economic
impact, leading to an annual loss of millions of US dollars.
Costs associated to repair and control of damages caused by the Zebra Mussel
(Dreissena Polymorpha) is estimated at US dollars 500 million over a period of 10
years.
Vibrio Cholerae, the species of comma-shaped, motile bacillus is the cause of chol-
era infectious disease. The Vibrio that produces the heat-tolerant exotoxin which
causes Cholera Epidemiology, transmitted through poorly treated water supplies.
Escherichia Coli - Species of bacterium that inhabits the stomach and intestines. E.
coli can be transmitted by water, milk, food, or flies and other insects. Mutations
can lead to strains that cause diarrhea by giving off toxins, invading the intestinal
lining, or sticking to the intestinal wall. Therapy consists largely of fluid replace-
ment, though specific drugs are effective in some cases. The illness is usually self-
limiting, with no evidence of long-lasting effects. However, one dangerous strain
causes bloody diarrhea, kidney failure, and death in extreme cases. Proper cooking
of meat, washing of produce, and pasteurization of cider prevent infection from
contaminated food sources.
Asian Kelp - Undaria Pinnatifida - grows and spreads rapidly, both vegetatively and
through dispersal of spores. Displaces native algae and marine life. Alters habitat,
ecosystem and food web. May affect commercial shellfish stocks through space
competition and alteration of habitat.
8
Valid from 31.08.2010
Denmark DESMI A/S (Head Office) Tagholm 1DK-9400 NørresundbyTel.: +45 96 32 81 11 Fax: +45 98 17 54 99 Web: www.desmi.com E-mail: [email protected]
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DESMI Ro-Clean A/STel.: +45 65 91 02 01Fax: +45 65 48 16 15Web: www.desmi.comE-mail: [email protected]
DESMI Ocean Guard A/S (Associate) Tel.: +45 20 16 00 26 Fax: +45 98 17 54 99 Web: www.desmioceanguard.com E-mail: [email protected]
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SingaporeDESMI SingaporeTel.: +65 6748 2481Fax: +65 6747 6172 Web: www.desmi.comE-mail: [email protected]
USADESMI Inc.Tel.: +1 757 857 7041Fax: +1 757 857 6989Web: www.desmiusa.com. E-mail: [email protected]
Applied Fabric Technologies, Inc.Tel.: +1 716 662 0632Fax: +1 716 662 0636Web: www.afti.comE-mail: [email protected]
EcuadorDESMI Ro-Clean Latinoamerica S.A.Tel.: +593 2 326 1939Fax: +593 2 326 4844Web: www.desmi.comE-mail: [email protected]
DESMI Group Companies/Offices:
DESMI A/STagholm 1DK-9400 NørresundbyPhone: + 45 96 32 81 11Fax: + 45 98 17 54 99Internet: www.desmi.comE-mail: [email protected]
