The entry into force of the Ballast Water Management Convention (BWC) in September 2017 after years of debate provided the maritime industry with a framework to deal with the increasing threat of invasive aquatic species. To date, 74 states have ratified the BWC, representing more than 75% of the world’s merchant fleet.
Carried in ships’ ballast waters, invasive aquatic species have had a significant economic impact throughout the world. Specific ballast discharge events have been held responsible for disasters such as outbreaks of deadly disease, complete collapse of fish stocks, mass blockages of internal waterways and even the total eradication of some species. It has been suggested that the total loss to the world economy as a result of invasive non-native organisms is as high as 5% of annual production. In 2008 it was estimated that the 57 non-native species introduced into the Great Lakes was costing the United States $200 million annually, or $2 billion over the last decade.
Examples of invasive species include the European Green Crab which has established populations on both coasts of North America, in southern South America, Australia, South Africa, and Japan. It is a predator of many forms of shore life including worms and molluscs and impacted the commercial shellfish industry in several regions. Killer Algae green seaweed, native to the Indian and Pacific Oceans, has spread widely in the Mediterranean, replacing native plants and depriving marine life of food and habitat.
To control the further spread of these species in vessels’ ballast water tanks, the revised BWC introduced two standards for the handling of discharged ballast water. D-1 addresses the ballast water exchange standard and D-2 details the ballast water performance standard using an approved BWTS.
The D-1 standard requires ships to ensure that ballast water by volume is exchanged far away from the coast where it can be released without significant impact on the local environment, a result of the fact that coastal organisms will not survive in deep oceans or open seas due to different temperatures and salinity. This can be achieved by several means. The sequential method involves emptying the ballast tank and refilling with replacement ballast water equating to at least 95% volumetric exchange. The flow-through method involves pumping replacement ballast water into a ballast tank and the existing ballast escaping by overflow; at least three times the tank volume is to be pumped. The dilution method allows new ballast water to be filled from the top with simultaneous discharge from the bottom.
The D-2 standard requires ballast water management to restrict the amount and size of viable organisms allowed to be discharged and to limit the discharge of specified indicator microbes harmful to human health.
Ships under construction whose keel was laid on or after 8 September 2017 must conduct ballast water management that at least meets the D-2 standard from the date they are put into service. For existing ships, the date for compliance with the D-2 standard is linked with the renewal of the ship’s International Oil Pollution Prevention Certificate after September 2019.
One year since its introduction, the shipping industry is still grappling with the impact of the BWC regulations and the array of available technologies. According to a recent report by Hexa Research, the Ballast Water Management Systems (BWMS) market is expected to reach $117 billion by 2025. In order to protect their investment it is critical that shipowners and operators have assurances that this significant capital expenditure has been allocated wisely.
Since the implementation of the regulation it has become clear that crews are struggling to ensure compliance, risking potentially significant fines and reputational damage, as well as the negative impact on the environment through the spread of invasive aquatic species. A large number of BWMS have been type approved in accordance with either IMO or USCG requirements, however it is estimated that up to 60% of those installed are not being operated correctly. The USCG recently noted in its Port State Control Annual Report that the number of BWM deficiencies doubled in 2017 compared to 2016, based on broadly the same number of inspections.
Logs and records accounted for the highest number of deficiencies, along with alternate management methods, mandatory practices, BWM plans and the discharge of untreated ballast water. The USCG noted a lack of familiarity among crews regarding the strategy and operation of a BWMS, as well as confusion around maintenance practices and procedures. All of this creates a significant risk of non-compliance, even if the shipowner has installed a type-approved BWMS.
A further complication creating risk for shipowners is the lack of an agreed IMO regulation or ISO standard for the accurate shipboard testing and analysis of ballast water. While ISO 11711-1:2013 provides guidance on the materials, design, and installation of equipment used to take samples of treated ballast water from the discharge pipe onboard a vessel, it does not yet include a standard on how to perform the representative sampling and analysis of ballast water.
Inaccurate testing and false readings could lead to delays with port state control and potentially significant fines, risking reputational damage, as well as the impact of non-compliant discharges on the environment. Indeed the USCG advised in its report that operational control restrictions had been imposed on 17 vessels due to the severity of deficiencies. In August 2017 the USCG issued a USD 5,000 fine to the operator of a freight vessel for unauthorised ballast water discharge into the Willamette River in Portland.
Having a robust and consistent standard in place eliminates ambiguity and provides assurance that compliance can be proven based on trusted and accurate data. A regulatory standard that has been developed and agreed by leading experts will provide shipboard personnel, as well as port and flag state officials, with an agreed and robust standard for verifying whether the BWMS is working as intended.
About Chelsea Technologies Group
CTG have been designing and manufacturing bespoke sensors and optics equipment for the aquatic environment for over 50 years. Industries we specialise in include Maritime, Marine Science, Environmental, Defence, Homeland Security and Process Control. We have built up a reputation for globally supplying ship based systems to both military and civil operators over a number of years. These systems have been installed on ferries, research vessels, yachts and tankers.
Chelsea Technologies Group (CTG) is working closely with regulators including the IMO, ISO and port authorities as a trusted and workable international standard is developed for ballast water sampling and analysis, one that is based on a proven methodology for representative sampling and analysis of ballast water. The company has already initiated discussions with accreditation authorities and is undergoing a process of third-party protocol testing.
Unlike detailed analysis methods where samples need to be assessed in laboratories by specialists in water microbiology, testing with CTG’s FastBallast compliance monitor can be carried out by any crew member at any stage during the ballast water discharge operation, producing results in under 10 minutes. CTG’s FastBallast compliance monitor is the only systems to pair the most sensitive technical components with a statistical method to generate a cell density that is truly comparable with laboratory analysis across all species and water types. This approach allows a measurement to be taken independent of an assumed cell size, in order to achieve the most accurate and precise readings to provide operators and port authorities with the highest level of confidence in compliance. It is the only technology capable of operating in a flow-through mode, while providing a high degree of accuracy with a representative report on discharge compliance.
FastBallast uses the single-turnover method, rather than the PAM multiple-turnover method, which provides a much lower detection limit (< 1 cell per mL) as the 20ml sample size avoids sampling problems at low cell densities. It is capable of determining the phytoplankton cell density of ballast water to IMO D2 & USCG Discharge Standards (10 to 50 µm range), with an equal degree of confidence as laboratory analysis. The single-turnover method was recently independently verified by the Chinese government as the most accurate method for portable ballast water testing, based on a series of benchmark tests that measured the accuracy of several methodologies against laboratory testing.
FastBallast was identified by Saudi Aramco’s in-house marine biology experts as the most accurate solution in the market for the sampling and testing of ballast water, and is being used to conduct spot checks undertaken by third-party sampling companies. Since August 2017 Saudi Arabia has been conducting ballast water monitoring on vessels to ensure compliance. Sampling data was obtained from more than 500 vessels by Global Strategic Alliance (GSA) using CTG’s FastBallast monitoring system, with a pass rate of 90% reported for vessels using the D2 standard.
CTG’s FastBallast is setting the gold standard for effective enforcement of the BWMC, and will help dramatically reduce the impact of invasive species worldwide. As well as its established presence in Saudi Arabia, CTG is in discussion with leading port authorities worldwide to help drive industry change in developing portable ballast water testing standards.
Invasive aquatic species pose a significant economic threat across the globe. The far-reaching consequences impact aquaculture, tourism and biodiversity. As the number of ballast water treatment systems on the market nears 100 with a wide array of treatment solutions, there will be an increasing number of vessels equipped with BWM systems and an acceleration in the spread of compliance monitoring. To eliminate the risk of any ambiguity over results, potential fines, delays and reputational damage, it is vital that ballast water sampling and analysis is conducted using a proven methodology and is measured to a consistent industry standard. Failure to deliver this standard will risk undermining the spirit of the BWM Convention.
Author: Dr Brian Phillips, Managing Director, Chelsea Technologies Group
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Emma Johnson, Maritime & Hydrocarbon Manager
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