DAWSON
COLLEGE
CIVIL
ENGINEERING
TECHNOLOGY
DEPARTMENT
ENGINEERING
AND
ENVIRONMENT
221-674-DW
Assignment
No.
6
Lab
Assignment
1.
The solid-waste
composition
and
the
quantity
of
solid
waste
generated
from
two
cities
located
in
the
developing
world
are
as
follows:
Component
City
1
City
2
Food
waste
(%)
47.0
65.5
Paper
and
cardboard
(%)
6.3
6.5
Ash
(%)
36.0
10.2
Other
(%)
10.7
17.8
Waste
generation
rate
(kg/person-day)
0.38
0.28
(a)
Which
city
generates
more
ash
on
a
per
capita basis?
(b)
Which
city
generates
more
non-ash
waste
on
a
per
capita
basis?
2.1In
1920,
five
trucks
were
required
to
collect
6400
tons
per
year
of
residential
and
commercial
waste
from
a
municipality
of
20,000
people.
In
2000,
the
population
is
100,000.
Knowing
that
the
solid
waste
generation
in
2000
is
4.5
Ib/capita/day,
(a)
how
would
the
annual
quantity
of
refuse
collected
have
changed?
(b)
Neglecting
lost
time
because
of
vehicle
breakdown
and
maintenance,
how
many
trucks
of
5
tons
capacity,
operating
5
days
per
week,
would
be
required
if
trucks
averaged
2
loads/day
at
80%
capacity?
3.
A
residential
area
of
about
40
ha
(
100
acres)
contains
400
single-family
residences
and
8
ha
(20
acres)
with
multiple-family
units
housing
400
people.
With
two
curb-side
pickups
per
week,
how
many
trips
on
each
collection
day
would
one
packer
truck
(4-tonne
capacity)
need
to
make
to
serve
this
area?
Assume
four
residents
per
single-family
unit.
Also
assume
the
residential
per
capita
waste
generation
is
1.1
kg/day.
4.
A
mass-burning
incinerator
with
heat
recovery
operates
on
400
tons/day
of
municipal
solid
waste
with
natural
gas
as
a
supplementary
fuel.
A
plan
for
paper
recycling
is
expected
to
reduce
the
amount
of
paper
and
cardboard
collected
by
20%.
For
the
incinerator
to
maintain
steam
