Still people tell me; "filters are required", "any Administration TA is OK", "a BWTS needs Class TA". These are wrong, easy to look up in the rules and perpetuated by people who should know better. The BWT industry has consistently let itself down making unsupportable claims, technical, competitive and otherwise. Media is not helping. A recently published list of five companies expected to lead the market in 2021 included two already withdrawn BWTS. Regulators and manufacturers need to be clearer and owners need to be educated and aware - as increasing numbers are. Without accurate information owners are not protected from purchasing a BWTS which defies the fundamentals of water treatment or is not qualified for their vessels.
Almost universally owners are pushing back BWTS installation. This is understandable to reduce costs and challenges today, letting an owner watch the developing market and industry. The implementation delay, codified at MEPC 71, means a rush of vessels decoupled in the last 18 months will all need BWTS when the second and third years of “un-decoupled” vessels also retrofit. The slow 2017-2019 retrofit activity will increase 2019-2020 but in late 2020 and 2021 it will increase dramatically. There will be a hard deadline and relatively little retrofit installation experience. Today owners may watch, but soon they should begin making their decisions, structuring practical installation schedules, committing to installers and suppliers. Timing to comply at the last minute may not be the wisest, or cheapest, way forward.
The BW discharge standards are very tough and require a high degree of water treatment. Any successful BWTS is high performance equipment. How is it possible for a high performance BWTS to operate on a vessel and not add to crew burden detract from the normal vessel operations? It is not.
So, use a successful BWTS which impacts vessel operations as little as possible. A BWTS which treats ballast at sea will allow; normal port operations, ballasting without filters, no balancing power demands, gravity discharge, no slow ballasting etc. The water must still be treated but this can be done during a voyage where attention and resources are not as stretched as in port.
In-line BWTS treat once into the tank and, where required, treat or neutralize during discharge. Treatment or neutralization cannot be checked in-tank to ensure compliance before discharge. If treatment is completed at the start of a 4 week voyage will it still be effective on bacteria at the end of the voyage. If neutralizing, will dosed neutralizer be adequately controlled by a real time in-line TRO measurement?
An in-tank BWTS can keep a growth suppressing dose of Cl in the tank at all times. It only needs to be a small dose but this will ensure biological compliance. In-Tank neutralization allows confirmation of complete neutralization before ballast is discharged ensuring chemical compliance.
By Giles Candy, Business Development, Environcleanse
The views presented hereabove are only those of the author and not necessarily those of GREEN4SEA and are for information sharing and discussion purposes only
About Giles Candy
Ballast Water Treatment expert- 15 years working in the BW industry. Developed, tested, certified, as well as sold and installed BWTS from 500m3/hr to 6,350m3/hr. Tracked the development of BW regulations and compliance requirements all over the world. Completed BWTS Type Approvals. Understand the marine and regulatory requirements to help a fleet establish a practical economic BW compliance strategy. A BWTS is a "bolt-in" system to be integrated with the vessel and it's operation, not a "bolt on" unit. I have watched, learned and understood the development of all different BWTS technologies.