OceanGuard® BWMS


Control Unit

Control Unit is responsible for regulating the entire system including collection of various signals from the sensors, Management of alarm signals and controls of system startup and shutdown. It contains all procedures for the system operation, displays the system working condition, including the working condition of various parts as well as data and status reported by real time inspection from various sensors.


OceanGuard® adopts full auto-back flushing filter, which can realize the simultaneous operation of filtration and back flush. The filtration precision is 50μm. It can remove organisms larger than 50μm in ballast water to prevent micro organisms and sediments entering ballast tank.


Treatment Capacity:100m3/h—5000m3/h.

Filtration Precision:50 μm

Automatic back-flush

Low input pressure

Flexible for retrofit


EUT Unit is the core of OceanGuard® BWMS. Each single unit has the treatment capacity from 100-3000m3/h. The Unit comprises of two parts: Electrocatalysis Unit and Ultrasound Unit. The Electrocatalysis Unit is able to produce large numbers of hydroxyl radicals and other highly active oxidizing substances to kill all organisms in ballast water within several nanoseconds. The whole sterilization process is completed inside the EUT Unit. During the treatment process, the Ultrasound Unit can clean the surface of Electrocatalysis Unit regularly to keep the long-term treatment effectiveness of the electrocatalysis material.


Advantages of OceanGuard®


【Technology of Advanced Electrocatalysis Oxidation Process (AEOP)】

Hydroxyl radicals produced in the process of Management by AEOP technology will disappear after several nanoseconds. These radicals have high sterilization efficiency, which are able to kill different bacteria, viruses, algae and dormant ovum in ballast water effectively (broad spectrum sterilization) in a chained mode. The sterilization process can be completed within EUT Unit. The concentration of TRO (total residual oxidation) can be controlled within 2ppm, so that the TRO can carry out advanced Management on the water in ballast tanks.

【No corrosion to Ships】

Hydroxyl radicals produced by OceanGuard® Ballast Water Management System will disappear after several nanoseconds. The whole sterilization Management is completed within EUT Unit. Through the Management, TRO concentration is within 2ppm. According to results of long-term operation, the system is proved to be safe and reliable, and water treated by OceanGuard™ causes no corrosion to the hull.

【Satisfy Requirements】

Fully meet IMO regulation and California requirement.

【Compact Design; High-Quality Spares】

Compact design, small footprint, easy installation and maintenance free. OceanGuard®  BWMS can be fitted on various vessels with different internal structures. High-quality materials and spare parts with long lifespan are used for all the components.

【Wide Scope of Application】

OceanGuard® BWMS shows excellent performance in fresh water and sea water. The discharged treated ballast water has no any harm to the environment in the surrounding waters.


Low operating costs. Energy consumption is only appr. 17KW for the treatment of 1000 m3 of ballast water.


OceanGuard®  obtained Explosion-proof Certificate, which can be fitted in the pump room of oil tanker, liquid gas carrier, etc.

【Single Treatment】

The whole process only needs the inflow treatment rather than the discharge treatment, so that it is proper for all the vessel ballast water discharge systems.


OceanGuard® Filter Specification

Type Volume(L) Dimension (MM)  Flow Range(M3/H)
HMT-50F 60 540*510*1450 10-50
HMT-100F 120 650*565*1445 10-150
HMT-200F 205 800*670*1600 10-250
HMT-300F 300 900*780*1705 50-400
HMT-500F 450 980*780*1705 50-550
HMT-600F 650 1060*895*2330 50-700
HMT-800F 860 1180*1015*2380 50-900
HMT-1000F 1100 1300*1115*2530 50-1100
HMT-1500F 1490 1440*1230*2610 100-1600
HMT-2000F 1900 1500*1230*3260 100-2100
HMT-3000F 2500 1700*1455*3480 100-3100
HMT-4000F 4000 1900*1675*3600 100-4500
HMT-5000F 5900 2100*1915*4050 100-5500
S-ZF1-V 170 760*655*1679 10-150
S-ZF2-V 190 760*655*1679 10-250
S-ZF3-V 280 800*790*1880 50-400
S-ZF4-V 330 930*830*2050 50-550
S-ZF5-V 400 920*805*2200 50-700
S-ZF6-V 800 970*960*2700 50-900
S-ZF7-V 1250 1255*1190*2700 50-1100
S-ZF8-V 1375 1255*1190*2633 50-1300
S-ZF9-V 1800 1550*1500*2800 100-1600
S-ZF10-V 2400 1560*1520*3110 100-2200
S-ZF11-V 2500 1560*1520*3250 100-2500
S-ZF12-V 4200 1800*1700*3756 100-3500
S-ZF13-V 5400 1850*1750*4150 100-4500
S-ZF1-H 170 1599*655*760 10-150
S-ZF2-H 190 1599*655*760 10-250
S-ZF3-H 280 1800*765*980 50-400
S-ZF4-H 330 2030*795*1025 50-550
S-ZF5-H 400 2145*795*1025 50-900
S-ZF6-H 800 2600*970*1210 50-900
S-ZF7-H 1250 2700*1190*1427 50-1100
S-ZF8-H 1375 2533*1190*1427 50-1300
S-ZF9-H 1800 2700*1350*1600 100-1600
S-ZF10-H 2400 3100*1520*1645 100-2200
S-ZF11-H 2500 3100*1520*1645 100-2500
S-ZF12-H 4200 3756*1700*1800 100-3500
S-ZF13-H 5400 3970*1740*1920 100-4500

OceanGuard® EUT Specification

Type Power(KW) Dimension(mm) Capacity Range(m³/h)
HMT-50E 0.8 426*411*1041 10-85
HMT-100E 1.5 426*555*1041 10-150
HMT-200E 3 426*555*1376 10-250
HMT-300E 4.5 426*555*1701 50-350
HMT-450E 6.8 456*601*1821 50-500
HMT-600E 9 505*631*1957 50-700
HMT-800E 13 505*781*1957 50-900
HMT-1000E 17 605*676*2123 100-1100
HMT-1200E 21 605*786*2123 100-1400
HMT-1500E 25 665*786*2208 100-1700
HMT-2000E 34 665*926*2208 100-2200
HMT-2500E 42 695*1054*2212 100-2700
HMT-3000E 52 695*1054*2222 100-3500
HMT-4000E 69 695*1054*2222 100-4500


Corrosion Test

Test Report for Corrosion Contrast Experiment for Water Treated by EUT Unit of OceanGuardTM BWMS to Different Materials and Coatings.

Based on the long-term testing , the effects of two test waters on Q235 steel, SS304 and coating materials are the same, indicating that the treated seawater will not change the corrosion rules in the natural seawater for the materials above; and for butyl rubber, the effects of treated seawater on its properties are less than that of natural seawater.

1.Photo of appearance feature of the no-scribe coating specimen immersed in two test waters for 180 days.

A Natural seawater immersion

B Treated seawater immersion
2. Figure 14 Photo of the appearance feature of the scribe-to-primer coating immersed in two test waters for 180 days.

A Natural seawater immersion

B Treated seawater immersion




Suitable for vessels of all types  ※Simple structure and flexible installation  ※Small footprint and low power consumption  ※One-stop service


Vessel Type Installation Time BWTS Class
Cruise Vessel 2012 HMT-200 RINA

Vessel Type Installation Time BWTS Class
Tanker 2014 HMT-2000Exx2 + HMT-300 CCS

Vessel Type Installation Time BWTS Class
Bulk Carrier 2015 HMT-1000×2 DNV

Global Threat

Shipping moves over 80% of the world’s commodities and transfers approximately 3 to 5 billion tonnes of ballast water internationally each year.

Ballast water is absolutely essential to the safe and efficient operation of modern shipping, providing balance and stability to un-laden ships. However, it may also pose serious threats to ecology, economy and health.

There are thousands of marine species that may be carried in ships’ ballast water,
basically anything that is small enough to pass through a ship’s ballast water intake
ports and pumps. If these organisms survive transport to other parts of the globe, their impact can be devastating. Such invasions can jeopardize the local ecosystem, and even pose threats to human health. Usually, their effects are irreversible.

The introduction of invasive marine species into new environments by ships’ ballast water, attached to ships’ hulls and via other vectors has been identified as one of the four greatest threats to the world’s oceans. In 2004, IMO adopted the International Convention for the Control and Management of Ships’ Ballast Water and Sediments, which will phase in requirements for ballast water treatment over the coming years.


The IMO Regulations

IMO regulations will not affect all ships in the same way. Ballast water treatment will be phased in, with requirements for different ships arriving at different times.

Keel laid
Timeline to reach the D-2 Regulation
Before 2009
1,500≤V≤5,000 2015
V<1,500 or V>5,000 2017
2009-2011 V<5,000 Dilivery of Vessel
V≥5,000 2017
After 2012
All Vessels
Dilivery of Vessel
Vessels built in 2009 should be in compliance with the D-2 Regulation by second annual survey,no later than 2011 (A.1005 (25)).
Requirements for vessels built in 2010 will be discussed in MEPC 59.


D-2 Regulation

In International Convention for the Control and Management of Ships’ Ballast Water and Sediments, the following D-2 Regulation is addressed regarding management of ballast water.


AEOP Technology of OceanGuard® BWMS

OceanGuard®  BWMS is developed by Headway Technology Co., Ltd. together with leading universities in China.  OceanGuard®  BWMS adopts Advanced Electrocatalysis Oxidation Process (AEOP) to kil microbes, bacteria, viruses and dormant ovum in water by using special semiconductor materials under electron excitation and the hydroxyl radicals (·OH) formed by water molecules. Hydroxyl radical (·OH) produced in AEOP is one of the most active substances with very strong oxidizability. It can have different kinds of chemical reactions with almost all biological macromolecules, microorganisms and other organic pollutants instantaneously. Besides, it has extremely fast reaction rate and strong negative charge electron affinities. The end products of reaction are CO2, H2O and traces of inorganic salt without any hazardous residuals. Therefore, the treated water can be discharged out of board without any pollution. The chemical reaction which involves hydroxyl radical is free radical reaction, and it is extremely fast. Generally, the reaction rate with organics is over 109 L/ (mol.s).
Moreover, the form and existence time of hydroxyl radicals is quite short, which is less than 10-12 s, so that the high efficiency and effectiveness of OceanGuard™ BWMS can be guaranteed.


Data from Landbased testings of OceanGuard®  BWMS carried out in NIVA in Sep., 2009.

Test Project Organism Unit Influent water In treated water on day 0 In treated water on day 5 IMO Regulation Requirement of Califomia
Land-based Testing >50μm Ind./m³ 213304 0 0 <10 0
>10-50μm Ind./l 2.023×106 0 0 <104 <10
E-coli bacteria cfu/100ml 2200 <1 <1 <250 <126
Entrococcus cfu/100ml 91 <1 <1 <100 <33


Shipboard testings carried out in MV YOKOHAMA in Nov., 2009.

Test Project Organism Unit Influent water In treated water on day 0 In treated water on day 5 IMO Regulation Requirement of Califomia
Ship- board Testing >50μm Ind./m³ 3214 0 0 <10 0
>10-50μm Ind./l 3.22×105 5.7 0.7 <104 <10
E-coli bacteria cfu/100ml 230 <1 <1 <250 <126
Entrococcus cfu/100ml 42.3 <1 <1 <100 <33