guidelines: consumables and waste management · guidelines: consumables and waste management...
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Guidelines: Consumables and Waste Management
Closing the loop
Mrs Yildiz Williams & Mr Andy Wright
12 December 2018
Introduction
● Background• As part of the development of these Guidelines, Lloyd’s Register has visited two
Stena Line ships sailing between Harwich and Hoek van Holland
• These ships are Stena Britannica and Stena Hollandica
• Both ships are fitted Wartsila closed loop EGCS systems to the four main engines
● Application• Although these Guidelines are prepared based on a closed loop EGCS which make
use of a number of chemicals, they may be applied to all ships that make use of different types of EGCS regardless of ship type, flag or operational profile
● Recognitions• Lloyd’s Register would like to express deep gratitude to the crews on board Stena
Britannica and Stena Hollandica and to the Stena Line shore staff for their patience, assistance and hospitality during onboard and office visits. These Guidelines could not have been developed without their open and valuable input
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What is in the Guidelines?
● General information about EGCS
● Consumables management– Alkali
– Coagulant
– Flocculant
– Other chemicals
● Waste management– Effluent
– Sludge
● Port reception facilities
● Operations on board
● Training and information
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Consumables management
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Alkali
● Closed loop systems typically use sodium hydroxide as alkali in a 50% aqueous solution– Choice of materials
– pH of 14, hazardous, can cause severe skin burns, respiratory damage and eye injury.
– Alternative alkaline: magnesium oxide and sodium bi-carbonate
● Loading
● Storage
● Use
Consumables management
● An acidic solution (pH<3) of water with polyaluminiumchloride:– Coagulant breaks the charges
around the particles so that they can reach and collide against each other and form small floc
– Loading
– Storage
– Use
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Coagulant
Consumables management
● Flocculant (pH 4) is a polyacrylamide – a polymeric material containing volatile hydrocarbons:– The long chain molecules of the
flocculant sweep the coagulant floc into clusters.
– The flocculant then floats the contaminants to the top of the liquid.
– Loading
– Storage
– Use
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Flocculant
Consumables management
● Chemicals used for calibration checks on the Effluent Monitoring Module. These may be:– Test standard for calibrating the
pH-sensor
– Turbidity test standard for calibrating the turbidity-sensor
– PAH test standard for calibrating the PAH-sensor.
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Other chemicals
The exact required specification of the chemical shall be described in detail within the relevant MSDS which shall be made available at the relevant storage area and where it is used. These shall be in the language of the crew and in English for Port State Control inspections.
Waste management
● In an open loop EGCS the effluent may be treated and will be diluted before discharge to sea
● Closed loop EGCS require bleed off from the circulated wash-water which will, after treatment, be discharged to sea. However bleed-off rate can be low enough for this to be temporarily retained in holding tanks for later discharge to sea or landing ashore
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Effluent
IMO MEPC.259(68) Guidelines place emission limits on effluent discharge, providing the emission limit values are satisfied, they allow for EGCS to operate while discharging effluent to sea with no further restrictions – however there may be additional national / local restrictions
Waste management
● The waste generated from EGCS is categorised to be harmful to the marine environment therefore its incineration on board or discharge to sea is prohibited - no exceptions
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Sludge
Operations on board
● Crew engagement and training
● EGCS operation
● Exhaust & discharge water monitoring devices
● Maintenance and repair
● Surveys and Inspections
● Emergencies and non-standard operations
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Challenges on board
What happens when we have crew turn-around? How do we retain knowledge?
How to repair a part which is contaminated with various chemicals? Are there any procedures in place?
Port receptions
● The sludge skips to be stored securely within port area
● Collected by authorisedindustrial waste collectors licensed to dispose the contents in line with the national waste management regulations
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Waste Landed Ashore
Education, training and information
● All relevant parties should develop and undertake information and training programs suited for all stakeholders
● The materials should be prepared and presented in such a way that they relate to the relevant stakeholders involvement
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Crew Engagement & Training
Individual User Development
● Acting on feedback from the crew as to their everyday concerns
● Further bespoke training as required
● Information sharing between stakeholders
● Responsiveness and evolution of procedures on the basis of developments
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Consumables and Waste Management Guidelines
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Thank you
If you require any information in relation to Closing the Loop project in general or the Consumables and Waste Management Guidelines in particular please contact LR’s Project Manager:
Dr Reddy [email protected]