AN INNOVATIVE SOLUTION TO UNDERWATER HULL CLEANING

“IN RECENT DECADES, AS GLOBAL TRADE AND MASS TRANSIT HAVE BLOOMED, IT IS ESTIMATED IN ANY 24

HOURS 10,000 DIFFERENT SPECIES, SUCH AS MOLLUSCS, CRUSTACEANS, SEAWEED AND PLANKTON,

ARE MOVED AROUND THE WORLD. THE INTERNATIONAL UNION FOR THE CONSERVATION OF

NATURE CALCULATES THAT INVASIVE SPECIES ARE THE SECOND MOST SIGNIFICANT THREAT TO

BIODIVERSITY AFTER HABITAT LOSS”

(Financial Times 22nd May 2016)

IMO Considerations for Commercial Vessels “stop” spreading Alien

Invasive Spices “AIS”

Maintain a clean hull through best practice hull maintenance between dry docking (as outlined by the International Maritime Organisation ) Best practice maintenance can include, but is not limited to:

Biofouling Management Plan and Record Book,

Maintenance of a current and damage-free antifouling coating,

Regular underwater hull inspections

Underwater Hull Cleaning

IMO focus today besides the main hull on Niche areas those areas on a vessel that protrude or are recessed from the flat hull surfaces, those in the figure below are of particular importance for biofouling maintenance, as biofouling tends to accumulate in these areas

Fouled main hull vs Clean hull Photos from THC real works

Fouled vs Polished Propellers Photos from THC real works

Fouled Niche Area’s Photos from THC real works

Technology TECHULLCLEAN (THC) is not just one hull cleaner but a series of tools operated by divers or remote controlled Cleaning a vessel hull and Its nice areas is no different from cleaning your house using a Dyson The Filter The Flexible Hose The head for the floor The head for the Sofa The head for the corners and curves

THC Technology series of tools

The Filter The Hose The head for the floor The head for the Sofa

The heads for the corners, curves and propeller “Niche Areas”

Treatment Surfaces

Flat Vertical Areas Flat Bottom Areas Curved/Angled Areas Nice Area Any hull Material Any Coating type Propeller Thrusters

We can clean underwater from a Super Yacht to a Super Tanker

THC is based on brush cleaning but can adapt to water jet cleaning or a combination of both

SYSTEM SET UP

The Hydraulic system operation by bio oils

The Electric system The treatment & Filter system

The Hull Cleaner

220v

38v

Filtered clean sea water

Reclaim debris & sea water to the filter

The (2) UW Buster pumps on the hull Cleaner

The diver pilot

Air Venturi

The THC Hull Cleaner Crawler

The Reclaim

In 2015 THC with SGS in the united states conducted a flow and vacuum study with Stress Engineering Services Inc. in the United States to learn how a rotating disk perform underwater and this study is today the reasons why the THC hull cleaner is a closed crawler unit with high performance pumps on the unit to detain the debris from the hull and create the maximum environment for reclaim.

Drive Direction

Water flow

Reclaim Frame

Reclaim 2.5 inch pump 1

Reclaim 2.5 inch pump 1

Reclaim 1.5 inch venturi pump 4 in total

Reclaim Barrier

The Reclaim

The THC reclaim system collect Marine fouling, AIS and Paint Matrix

Filtered water return to the sea

THC Surface handling winch for the hull cleaner umbilical

Hydraulic powered handling winch

The umbilical with protective and floating cover (offshore type)

The Filter surface system

The 25 micro filter

Filter box 3

2 Micro filters

2 filters and 2 pumps

2 Motors

100 micron filter liner

Filter box 2

Filter box 1

The Micro filter system What is a Micron.

Micron Filters size 25 filter the water before leading back the water to the sea

The Macro filter system in operation

The fouling and paint plumb is separated with the 100 micron filter liner between filter box 1 and filter box 2 and the main filter box 3 before it passes to the two filter pumps and two 25 micron filters and filtered warter return to the sea

100 micron Filter liner

Filter box 3

Filter box 2

Clean water passing to main filter 3 box

and to micron filters

Water from Hull

cleaner

Filter box 1

The filter system (the Result)

Filter insert 1 full of shells Box 1 and Box 2 Filter insert 100 Micron filter liner full with soft fouling paint and shells

The success of the THC water treatment and filter system is because of the large surface of the 150 micron filter liner between filter box 1 and filter box 2 allowing large volume of water to pass into the main filter box 3 capture ring (AIS) alien invasive species and marine fouling, paint pigmentation with Cu is retained before passing the 25 micron filters The amount of volume of water treated pr hour is minimum 57m3

The filter system (the Result)

Dry Biomass Semi dry Biomass Wet Biomass with paint

Waste and Samplings from the filter system

The filter system (the Result)

Drain filter Box 3 Box 3 waste sediments Box 2 fouling and paint waste in liner bag 100 micron

The Water Treatment

MV Maersk Taurus LOA 332m, anti fouling paint, draft 12.3m during the cleaning the water is constant tested to prove no impact to the environment test 27/5-2016 testing period from 13;19 until 19:53 Max Allowed NTU Turdidez is 150 to critical 200, method used for fluorometric determination of chlorophyll Yentsch & Menzel (1963) & Holm Hansen (1965). The average valve taken in the period is 9.2 NTU.

Parameter Before HC During HC Just After HC Average

Ph 8.20 8.21 8.11

Temp 14.34 14.76 14.07

Salinity 37.3 37.3 37.2

Oxygen 7.46 7.40 7.88

NTU 8.6 15.3 11.1 9.2

The Water Treatment

Parameter Before HC During HC Just After HC Average

Ph 8.40 8.44 8.35

Temp 17.38 17.43 17.23

Salinity (psu) 36.2 36.2 36.2

Dissolved oxygen (% saturation)

68.7 69.5 69.4

Turbidinity (NTU)

9.2 11.8 9.4 9.2

MV Taasingen Maersk LOA 191m, anti fouling paint, draft 9.2m during the cleaning the water is constant tested to prove no impact to the environment test 30/6-2015 testing period from 08;30 until 12:30 Max Allowed NTU Turdidez is 150 to critical 200, method used for fluorometric determination of chlorophyll Yentsch & Menzel (1963) & Holm Hansen (1965). The average valve taken in the period is 9.2 NTU

The Micro filter system (the Result)

The two micro filters are easily replaced during the cleaning operation, filters can be applied from 5 microns to 100 Microns, today we use 25 microns. (see also enclosed video film)

Waste Handling

Waste handling procedure

After job completion the filters are separated and collected by a certified waste handling company

The waste handling company issue a certificate with name of the vessel and what has been collected

Available end of each month a report can be send to the port of each job and location of the job.

One system collects between 17 and 22 tons per year

Waste Handling

All waste and Macro and Mico filters are collected for certification of up to 1500 kgs/L

Example Waste Handling Certificate

Procedure Job Certificate

OPERATORS SAFETY The divers safety when operating the THC hull cleaner is of top priority as for

any other diving or remote operation.

The diving and Cleaning operation refer to minimum the following standards besides local legislations

Dutch Diving Legislation Recommended Practice

OGP Diving Recommended Practice

IMCA D040 & Do23 – part 2 with SHELL additions

THC Risk assessment

THC Dive plan for diving in dark areas and during

night

THC Night light Recommended Practice

Vendors Safety Manual System

Vendors Diving Manual

References IMO MPEC.1/Circ.811 13 June 2013

IMO regulations & Hull Medic

IMO MPEC 62/24/Add.1 Annex 26 page 1 2011

AMT EAI report

IMO 2000 vs 2008 SPC copper oxide release

NIVA Memo 3rd update,

Fluorometric determination of chlorophyll Yentsch & Menzel (1963)

Fluorometric determination of chlorophyll Holm Hansen (1965).

Algeciras Port tested and approved annually sense 2010

Cadiz University test and approval annually 2010

Maersk Line test and approved sense 2010

Canada general approval 2011

Tested and approved by Jotun Paints 2014

Test and approved by International Paints 2014

Vessels references (430) ..check with finance

References Approvals 2010 2011 2012 2013

References Approvals 2014 2015 2016 2017

References (Vessel ECO PP jobs) Sine Maersk Safmarine Bayete Gjertrud Maersk Maersk Newport Maersk Buton Maersk Leticia Safmarine Niger Safmarine Nuba Grete Maersk Nedlloyd Juliana Nedlloyd Hudson Thomas Maersk Taasinge Maersk Jeppesen Maersk Gjertrud Maersk Maersk Norfolk Tinglev Maersk Faust Maersk Klaipeda Dorothea Rickmers (over 600 vessels) Makita Maersk Danang AGLAIA Safmarine Bia Wehr Havel Maersk Dunedin Maersk Arizona Safmarine Traba E.R. Lubeck Safmarine Bayete Maersk Duncan Maersk Drummond Maersk Batam Nedlloyd Tasman Maersk Malacca Safmarine Nile

THANK YOU THE DEVELOPMENT DO NOT STOP

Asesoramiento y cálculo en limpieza de buques MIMAR 5-6 noviembre de 2018

Dr. Juan M. Vidal(1) y Dr. José J. Alonso(2)

(1) Dpto. Ciencias y Técnicas de la Navegación y Construcciones Navales

(2) Dpto. Física Aplicada

El papel de la Universidad de Cádiz...

* Evaluar los procedimientos en la limpieza de cascos

* Evaluar el rendimiento de cada parte del sistema y en conjunto

* Sugerir modificaciones de mejora

* Vigilar por el cumplimiento de la normativa

* Emitir informes a Capitanía Marítima sobre las empresas

Hul cleaning enterprise

Authority

UCA

Evaluation

El esquema de cálculo es:

Buque

Barco con filtros y bombas Filtro sucio – Filtro nuevo

Concentración antes y

después del fltrado

Eficiencia 80%

¿?

Mejoras:

Faldones

Direcciones de rotación de

cepillos

B

u

q

u

e

S

S

S

S

C Turbidez-Concentración

Eficiencia total: 50-80%

About Underwater Constractors Spain (UCS)

It was the first one to be tested and verified by UCA It started in 2008 to implement suggestions and improvements of the of the machines and cleaning procedures Its yearly evaluation has been always positive and accomplishing the environmental legistation It has reached a 80-90% of efficiency in filtering with an overall efficiency of about 50% at high speed and about 80-90% at low speed. It is the longest record hull cleaning enterprise in being environmentally evaluated

UCS is BAT!

Mejoras en la evaluación del procedimiento: Modelos numéricos

Thanks for your attention…