The effluent is stored in this compartment to allow time for the chlorine to kill off any harmful bacteria. This is achieved by chlorine tablets being added into two tubes with the effluent passing over them. The effluent absorbs the required amount of chlorine before flowing into the chlorine contact tank, where it is finally discharged overboard.
The discharge may be controlled manually or automatically. The control equipment includes facilities for high level control and alarm functions using signals from float switches fitted in the treatment tank.
The contents of the tank can be discharged:
By level switches Manually
Level Switch Operation
If the discharge mode selector switch is set to the ‘AUTO’ position, the pump will start when the high level switch is activated and stop when the low-level switch is activated.
Manual Operation
If discharge is required below the low-level switch position, the pump can be started manually by setting the mode selector switch to ‘HAND’ and pushing the start button. Discharge will continue until the low-level switch is activated, or until the pump is manually stopped.
! CAUTION
Running the pump dry will damage the pump.
Alarms
A high-level alarm is activated if the high-level switch is not reset within a set period of time of it being activated.
A thermal relay alarm will indicate overcurrent in the pump motor.
! CAUTION
Discharge overboard should not take place within 12 nautical miles of the coast.
Garbage Management Plan
Garbage Management Plan For Maersk
Cabin Garbage and Public Room Ship Operational Garbage
Deck 1. Plastic
2. Floating dunnage 3. Lining/packing materials 4. Paper, rags, glass, metal, bottles, etc.
5. Oily rags 6. Solid oily waste 7. Waste oil
Engine Room 1. Plastic
2. Floating dunnage 3. Lining/packing materials 4. Paper, rags, glass, metal, bottles, etc.
5. Oily rags 6. Solid oily waste 7. Waste oil
Separation Generated garbage separated at source into the marked receptacles by the occupants/users
Separation Generated garbage separated at source into the marked receptacles by the occupants/users
Location of
receptacles Collected by Bridge
receptacles Collected by Work shop
E.C.R.
Engine Store E/R Decks
receptacles Collected by Cabin
Cleaning gear Lkr on A&C-Dk Conf. room
Cleaning gear Lk.
on upp.&B-Dk separated at source into the marked receptacles by the occupants/users
Separation Generated garbage separated at source into the marked receptacles by the occupants/users
Storage
WATER TIGHT GARBAGE ROOM LOCATED: ON UPP. DECK AFT The collected garbage to be brought
every morning to the garbage room as per designated duties for storage.
Officers 1. Plastic
2. Paper, rags, glass, bottles, metal, etc.
Crew 1. Plastic
2. Paper, rags, glass, bottles, metal, etc.
Galley and Messroom Garbage
Location of
receptacles Collected by Inside galley
receptacles Collected by Inside Store 2/Cook
Separation Generated garbage separated at source into the marked receptacles by the Chief Cook
Separation Generated garbage separated at source into the marked receptacles by the Chief Cook & 2/Cook
Chief cook will check with the bridge if vessel is more than 12 miles from nearest land.
Storage
WATER TIGHT GARBAGE ROOM LOCATED : ON UPP. DECK AFT The collected garbage to be brought every morning and evening to the garbage room as per designated duties for storage.
Galley Stores 1. Plastic
2. Packing material 3. Paper, glass, bottles, metal, etc.
Galley & Messroom 1. Food waste 2. Plastics 3. Packing material 4. Paper, glass, bottles, metals, etc.
Processing of Food Waste Food waste will be processed using chafe cutter or disposer and will be disposed to the sea. Chief Cook is responsible for the operation of the DISPOSER located in the galley.
Yes
To Sea
No
Garbage Management Plan
Storing Garbage In Garbage Room (Located On Upper Deck Aft)
Sea Disposal
By GP2 1. Under the supervision of C/O 2. Obtained permission from Bridge 3. All Disposals to be recorded in the garbage log
Disposal To Shore Facility
By GP2 and assisted by GP1 1. Under the supervision of C/O 2. All Disposals to be recorded in the garbage log
Collected By GP2 & GP1 Under supervision
of C/O and taken to incinerator.
Incineration Under supervision
of 2/E.
Generated ash brought to storage area and kept in yellow receptacle for sea disposal by Motorman.
Red Receptacle For incineration
Blue Receptacle For sea disposal
>25 nm outside special area
Yellow Receptacle For sea disposal
>25 nm outside special area
Black Receptacle For landing ashore Green Receptacle
Food waste for sea disposal
>25 nm outside special area
To Sea To land ashore
Examples 1. Plastic
2. Burnable dunnage 3. Paper, rags, etc 4. Oily rags 5. Solid oily waste 6. Waste oil
Examples 1. Paint 2. Chemicals 3. Oil soaked material Examples
1. Floating dunnage 2. Lining
3. Packing materials
Examples
1. Paper, rags, glass, metal, bottles, crockery & similar refuse
2. Incinerator ash
Examples 1. Food waste
P P
Illustration 2.15.1a Inert Gas Generator In Engine Room
PI PI
To and From Fresh Water System Smooth As Possible
No.2 Blower Steam System
Condensate To
Dom. Fresh Water
Sea Water
2.15 Inert Gas (Top-up System) Generator
2.15.1 Inert Gas Generator
The inert gas plant, installed in the engine room, produces inert gas which is used to provide a gas explosion protection system for the cargo oil tanks and slop tanks. This is achieved by maintaining a slight over-pressure in the tanks at all times.
When products are carried, the respective tanks would normally be blanked off from the I.G. system
Whilst discharging the cargo, liquid pumped out of the tanks is replaced by inert gas. At all times, pressure of the inert gas in the tanks is maintained slightly above atmospheric pressure.
The operating principle is based on the combustion of a low sulphur content fuel and the cleaning and drying of the exhaust gases.
The inert gas plant includes an inert gas generator, a scrubbing tower unit, blowers, an effluent water seal, a fuel injection unit, deck seal and an instru-mentation / control system.
Manufacturer: Smit Sinus Gas Systems B.V.
Inert gas delivery rate (m3/h): 3,750 Inert gas composition (% vol) O2: 0.5 Inert gas composition CO2: 14%
Inert gas composition CO (max): 100ppm Inert gas composition NOx (max): 65ppm Inert gas composition SO2(max): 2ppm Nitrogen balance to 100%:
Inert gas composition 'soot' : Bacharach 0 The inert gas plant is locally operated.
Working Principle
Inert gas is produced by the combustion of diesel oil supplied by the diesel oil pump and air provided by blowers, taking place in the combustion chamber of the inert gas generator.
Good combustion is essential for the production of a good quality soot free low oxygen inert gas.
The products of the combustion are mainly carbon dioxide, water and small quantities of oxygen, carbon monoxide, sulphur oxides and hydrogen. The nitrogen content is generally unchanged during the combustion process and the inert gas produced consists mainly of 85% nitrogen and 15% carbon dioxide.
Initially, the hot combustion gases produced are cooled indirectly in the combustion chamber by a sea water jacket. Thereafter, cooling of the gases mainly occurs in the scrubber section of the generator, where the sulphur oxides are washed out. The sea water for the Inert Gas Generator is supplied from the sea water cooling system.
Before delivery out of the generator, water droplets and trapped moisture are separated from the inert gases by a demister. The inert gas is supplied to deck via a deck water seal.
The Inert Gas System can supply fresh air instead of inert gas with the same capacity.
Burner Description
The combustion air is supplied to the main burner by two blowers, each supplying 50% of the total capacity of the generator. The quantity of combustion air to the burner can be manually adjusted by a regulating valve in the excess air discharge line.
Fuel (M.D.O.) is supplied at a constant pressure by the gas oil electric pump which has a built-in pressure overflow valve.
Before ignition or start up of the unit, and with the pump running, all the fuel is pumped back via the fuel oil overflow valve. This valve also serves to regulate the delivery pressure of the pump.
The fuel oil flows to the nozzle of the main burner via two solenoid valves and two fuel oil regulating valves.
A programme switch in the local control panel regulates one of the solenoid valves which operates the pilot burner and initial firing.
The main burner is ignited by a pilot burner. The main fuel oil burner is of the high-pressure steam assisted atomising type. The fuel is directed to the burner orifice through tangential slots which ensure that the fuel leaves the burner as a thin rotating membrane which is atomised just after the nozzle.
Steam is supplied to the atomising ring which is fitted to the end of the burner gun and imparts a tangential flow into the oil stream thus ensuring a ultra-fine dispersion of the fuel oil. In this manner good combustion is guaranteed with no formation of soot.
2.15.2 Operation
a) Open all valves for utilities (sea water, fuel, etc.).
b) Supply electrical power to the inert gas generator panel.
c) The generator is started by operating the start button. The complete starting process is fully programmed and safety interlocked.
d) The purge line is open when the generator is started and will remain open until the oxygen content drops to within required limits. At this point the supply to deck valve will open and the purge valve will close.
The starting program runs as follows:
a) The blower purges the system with air before the pilot burner is ignited by the spark plug.
b) The pilot burner is ignited. As soon as the flame is detected the main burner is started.
c) After flame detection of the main burner and flame stabilisation, the pilot burner is shut down.
d) After 4 minutes of purging, the delivery line is opened and the purge line closed - provided that the oxygen content is correct. If not, the purge line remains open until the correct fuel/air ratio has been set and the correct oxygen content is obtained.
For long standstill periods it is recommended to purge the sea water cooling system is purged with fresh water.
To allow for a remote stop of the generator, an extra contact is available in the control panel for connection to the ship's main control room.
2.15.3 Maintenance
a) The use of blowers and deck seal sea water supply pumps should be alternated on a regular basis.
b) Check the calibration of the oxygen analyser before use.
c) The sootblower for the boiler uptake valve should be operated before opening the uptake valves. The manual steam valve to the required uptake valve should be opened prior to this operation.
The ‘Push to Clean’ button is pressed. The manual steam supply valve is then closed after the operation.
d) The blowers should be water washed at shut down to prevent build up of solids on the impeller. Prior to this operation the drain valve is opened and the flexible hose is connected. When the blower motor receives the stop signal, open the water supply to the blower while the fan is running down. On completion, the fresh water valve is closed and the flexible hose disconnected.