Garbage Disposal notes for Hotel Management students....

1. GARBAGE DISPOSAL
THE BIGGEST CHALLANGE FOR A HOTEL!

2. GARBAGE DISPOSAL
There are three types of waste : solid wastes, liquid
wastes and gaseous wastes.

3. GARBAGE DISPOSAL
Garbage or swill is the waste matter resulting from
the preparation, cooking and consumption of
food. It includes all inedible, spoilt and useless
scraps of food, which needs to be disposed of.
Waste matter from preparation will include
vegetable, fruit peels and trimmings, rotten food
stuffs, spoiled canned food etc. Cooking wastes
include peels, skin and bones, charred
preparation and spoiled food. Sometimes food is
wasted after it is served. Plate waste also
accounts for a large portion of garbage.

4. GARBAGE DISPOSAL
Refuse refers to any waste material other than
food material or swill. Non food waste from the
kitchen includes all cans, bottles, paper bags,
polythene bags, lids, cardboard cartons etc.
From the service area single service items,
paper napkins and straws, toothpicks etc. also
contributes significantly to the overall waste
matter.

5. GARBAGE DISPOSAL
Different Methods of Garbage Disposal:
Landfilling(dumping and controlled dumping):
All types of solid waste can be disposed in this
method.
In this method, refuse is dumped in low lying land
and in land depressions like pits and hollows for
reclaiming low lying land. This is the easiest method
of disposing of dry refuse. Bacterial action reduces
the volume of the refuse and gradually convert it
to humus. The method, however, has the following
disadvantages:

6. GARBAGE DISPOSAL
 Loose refuse may be dispersed by winds
 Garbage to be exposed to rodents and flies
 It is unsightly in appearance and produces
and unpleasant smell.
 Surface water as well as ground water may
get polluted.

7. GARBAGE DISPOSAL
Burial: This method is suitable where the
volume of garbage produced in small. A trench
is prepared to collect the garbage. At the end of
the day all the garbage put into the trench and
then filled with the earth and sealed. It take
approximately four to six months for complete
decomposition of organic matter into an
innocuous mass through chemical, bacterial
and physical changes.

8. GARBAGE DISPOSAL
Composting: This is a method of combined disposal of refuse and
sludge. Sludge is the solid precipitate in the sewage tank which settles
in the bottom.
Animal and plant washes are rich in nitrogen and phosphorous which
can be returned to the soil by composting. Washes of biological
origin contains high amount of water and are digested anaerobically by
microorganisms in absence of air. The waste is decomposed and
stabilised by bacteria and fungi to form a humus like material called
compost.
During the process, CO2, water and heat are produced. Heat produced
above 60 degree Centigrade to destroy the larvae and eggs of flies
and other pathogenic organisms.

9. GARBAGE DISPOSAL
Incineration : It is a hygienic involving
burning of refuse and converting it into
harmless waste. It is burnt in a specially
constructed incinerator. The incinerator
should be maintained in perfect working
condition.
This system also has some
disadvantages, those are:
 If refuse does not burn properly, too
much offensive smoke is produced, in
turn pollutes the air.

10. GARBAGE DISPOSAL
 Organic nitrogen, which could have been
returned to the soil is converted into inorganic
nitrogen and is returned to the atmosphere.
This method cannot be used in the rainy season
or if the refuse is wet.
 Although incineration is ideal from the sanitary
point of view, it is costly compared to the other
methods and the fuel and fertilizer value is lost.