Discharge sewage is the drainage and other
wastes from any form of toilet or
driller or any other waste water
when mixed with such drainages
incorporated with this description, the term sewage includes human faces
wastes, sewage does not include
grief water. I waste water from
showers and sinks unless it is mixed with any of the above
However, any discharge
from vessel will be either the
following categories
-
Treated sewage
-
Untreated
sewage
Treated swage : This has passed through on board treat let
system and has
three distaste
grades grade A, B andC
C: Lowest level
B:
Higher level
A: Highest level
Macerated
sewage is an untreated sewage
Untreated (raw
sewage):
It has non passed Through
treatment system. This sewage
that is discharge directly into
the water way in
areas where discharge is permitted
or contained in on board holding tank. Any unrelated sewage that is discharged, in areas where it is permitted, must first pass through a macerator
Since
Melbourne services limited separates
with a declared ship ( A class one
Commercially registered
carrying vessel fitted with a toilet)
The vessel have fitted
sewage holding tank after storing
disposed off on shore according to ship board sewage management plan.
The process of excessive deposition of chemical
nutrients in water is termed
eutrophication . This is one of the
problems caused by sewage polluted H2o
Toxins
released in rivers through sewage water are consumed by
fish and other organisms, the possibility of toxins
entering the food
It degrades water quality
Reduces the number of fishes
Increases biological oxygen demand
(BOD)
SEWAGE
TREATMENT MEANS
Firstly
primary treatment through grinding mechanism and then
pasted through the setting
several chamber chambers and neutralized with lime, up to
this stage .
The
sewage will still certain a large number of pathogenic and
non pathogenic organisms and also
sufficient organic matter .
The neutralized effluents are
sent to UASBC up flow anaerobic sludge blanket). It is a reactor
in this, the anarchic bacteria degrades the biodegradable materials present in the waste
l water. This release mouse foul odour
and releases methane, which can be used
else where . in this system, the
pollution load is reduced up to 85% ,
after this, water is sent to aeration
tank where it is mixed with air and bacteria
And the
bacteria digests the organic waste materials
this is called biological or
secondary treatment . Even after the treatment,
water is still until for drinking. The
harmful microorganisms needs to
be called
TERTIARY
TREATMENT
Finally, the disinfection process. To remove final
traces of organics, bacteria ,
dissolved inorganic solid etc for
tertiary treatment methods, such as chlorination, evaporation and
exchange absorption be employed . These depends of the final registration quality
of the final treatment
HOUSEKEEPING/
HYGIENE
This means
the orderly arrangement and to placement
of equipment, too is and
materials both raw and finished and wastes
Good house keeping improves the
hygienic condition of it
work and reduces potentials for
accident, fire essentials for all sites
PROCEDURE
-
Daily
cleaning of work places
-
Designation
of areas for water
materials
-
Proper receipt
and storage of raw materials in
designated areas
-
Clearing of floors
remove duties can
-
Storage
of flammable materials in safe place
separate from non flammable materials . also
applicable of some toxic and
corrosive materials
-
Proper
dispersal of rags and a loose
materials
-
Proper
arrangement of tools, by removing
from and storing in a
appropriate toxic box
-
Extension cables on flexible power supply and hand tools
should be collected approximately
Materials
should be stacked to block
emergency exists or fire fighting equipping