Pmed2 CHT Of Wastewater Flashcards
What is the Navmed p-5010-7
Wastewater treatment and disposal
Who’s responsibility is it to conduct visual inspection of marine sanitation devices (MSD) components as part of the routine habitability and sanitation inspections
MDR
How often does medical perform training on wastewater hazards? What’s covered?
Periodically and during indoctrination.
Health hazards with human waste, proper hygiene necessary and correct cleaning procedures for disinfection of contaminated spaces
Who must be present during cleanups and disinfection operations and provides on site advice when requested in the event of major sewage leaks or spills
MDR
What has been installed on the majority of naval ships to help manage waste waters
Collection hold and transfer system (CHT)
How many modes do CHT (collection hold and transfer) systems operate in
Three modes
Restricted waters
At sea
In port
Who is required to be present during during clean-ups and disinfection operations involving food service spaces, living spaces and medical spaces?
MDR
What type of CHT system do we use?
Type II-B Marine sanitation device
What are elements of the Collection part of CHT
Soil drains or sewage (toilets or urinals)
Grey water drains (showers, laundries and galleys)
Diverted valves which direct the waste water over the side or to the holding tanks
Hold elements of CHT
Tanks that retain sewage during transit of restricted water for eventual disposal.
NORMALLY SIZED 12 HOUR holding period depending on individual ship constraints
Transfer elements of CHT
- Sewage pumps
- Overboard and deck connection discharge piping
- Associated diverter valves and deck valves
- Each tank has two sewage pumps which are conencted in parallel to discharge sewage and gray water to a recieving facility, ship waste off-loading barge (SWOB) or directly overboard.Split into two modes.
What are the Two modes that sewage transfer pumps are equipped with?
Manual mode
- pumps are actuated independant of the level of wastewater in the tanks.
- Deactivates the pumps automatically when the low liquid level reaches 10% of tank volume to maintain PUMP SUCTION
Automatic Mode
-Low level stops pumps at 10% capacty to keep pumps PRIMED
- 80% capacity a visual and audible high level alarm is activated
What safety hazard with sewage poses the greatest threat to ship and personnel?
Hydrogen Sulfide (H2S)
When sewage is held in takes larger than 2000 gallons what must be done and why?
Aerated to prevent sewage becoming explosive
What should all pump rooms be equipped with in case of improper ventilation emergencies?
two Emergency escape breathing devices EEBD (Good for 10 minutes)
Who regularly inspects MSD components for LEAKS
Engineering personnel
What test can you do to pinpoint small leaks from pumps or pipes systems for CHT standards?
Paper towel test
Who must all leaks, spills, or other sources of contamination observed during engineering inspections be reported to?
Engineering officer
Executive Officer
SMDR
What are some toxic or explosive gasses associated with CHT?
Hydrogen Sulfate (MOST DANGEROUS)
Methane
Ammonia
Carbon Dioxide
What does Hydrogen Sulfate smell like?
Rotten eggs
What immunizations do workers frequently exposed to wastewater need to have up to date?
Polio (IPV)
Tetanus Diptheria (Td)
What are some PPE requirements for CHT workers?
Coveralls
Rubber boots
Rubber gloves
Face Shield
SCBA
Where do you need to place all contaminated clothing after a cleanup operation? CHT
Placed in a plastic bag and laundered with hot soapy watery titties
What safety procedures do you follow during a sewage spill?
NAVSHIPS TECHNICAL MANUAL chapter 593,
“POLLUTION CONTROL”
Medical, food service and berthing spaces must be disinfected with what disinfectants and who approves them? How do you clean other spaces.
APPROVED EPA
Germacides two types
Phenolic type
Iodine Type
Other spaces are thoroughly washed down with water and detergent
What do you do with bilges contaminated with sewage?
pumped out, washed with fire hose, pumped out again.
Potable water supply suspected of sewage contamination, must be what?
Secured, disinfected and re-checked until water is determined to be safe.
What are the color coding requirements for CHT within the ship?
Ships interior color is GOLD
-Valve handles
- Operating levers
What color must the exterior deck discharge be for CHT?
Same color as surrounding structure
Deck discharge stations must be clearly labelled with what?
Hose handling procedures
Sanitary health precautions
How far from the US and territorial seas must you be to dump sewage?
3 Miles
What are the three modes CHT is designed to operate in?
- At sea
- Sewage and grey water including those in the hodling tanks are diverted/disharged overboard.
- In port
- Sewage and grey water is collected in holding tanks and discharged into a sanitary sewer throu SEWER RISERS or ship off load barges (SWOB)
- In restricted waters
- Sewage is collected and held in holding tanks
- Grey water is discharged overboard via diverter valves
What gas are we most concered with with CHT?
Hydrogen Sulfate
