The approval submission was taken into consideration as part of the MEPC 65’s agenda covering “harmful aquatic organisms in ballast water”. Final Approval is required for systems using an active substance, and is based upon examination of full scale prototype test data and all required supporting documentation on aspects such as risk and safety to the ship, crew, general public, and the environment.
The documented information was reviewed and approved by a joint panel of experts from the Scientific Aspects of Marine Environment Protection ballast water working group. The application was submitted to the IMO by the Dutch Human Environment and Transport Inspectorate. A key element of the Final Approval submission was an investigation covering the impact of treated ballast water on coated and uncoated materials. A full Type Approval certificate for the Wärtsilä AQUARIUS® EC system is expected by end of July this year.
“Gaining IMO Final Approval status has involved an extremely stringent review and investigation process, and we are naturally very delighted that the Wärtsilä AQUARIUS® EC Ballast Water Management System has successfully met all the requirements of the process. This represents an essential and extremely significant milestone in offering the marine industry a safe, flexible, and extremely efficient means of treating ballast water, ” says Joe Thomas, Director, Wärtsilä Ballast Water Management Systems.
The Wärtsilä AQUARIUS® EC System
Wärtsilä AQUARIUS® EC is a modular ballast water management system, providing a safe, flexible and economical process for the treatment of ballast water.
Ballast water treatment with an Wärtsilä AQUARIUS® EC system is achieved through a simple and efficient two stage process. Upon uptake the sea water is first passed through a back washing filter (1st Stage) and then the filtered sea water passes through a static mixer, where the disinfectant generated from the side stream electrolysis unit (2nd stage) is injected to ensure a maximum level of 10 parts per million (ppm) in the treated ballast water.
During discharge the filter is bypassed and any residual oxidant in treated ballast water is monitored before being discharged overboard. If required, treated ballast water is neutralised by injecting sodium bisulfite into the main ballast line during discharge. Neutralisation effectiveness is continuously monitored to ensure compliance with MARPOL discharge limits.
Wärtsilä offers the Wärtsilä AQUARIUS® EC and Wärtsilä AQUARIUS® UV Ballast Water Management Systems, which both became part of the portfolio following the acquisition of Hamworthy plc in January 2012.
Wärtsilä AQUARIUS®UV Ballast Water Management System received type approval in December 2012