The
mismanagement of solid waste in urban areas poses a grave threat to
public health and the quality of life of people living in those
areas. Up to now there has been no comprehensive policy in India that
deals with the whole cycle of waste management from production at
household level to collection and disposal.
Existing policies are
largely regulatory and fail to address wider environmental and public
health concerns. Local authorities tend to see the problem of waste
as one of cleaning and disposal rather than tackling the problem as a
whole.
It
is almost seven years since rules on the management of household
waste were first introduced in India. Those rules outlined steps to
be taken for the management of household waste. They clearly defined
the roles and responsibilities of those involved in dealing with the
country’s waste disposal.
However,
since then there has been little progress. Simple measures such as
segregation of waste and door-to-door collection have not been
implemented. Instead local authorities have tended to rely on
expensive incineration and waste-to-energy (WTE) schemes.
Politicians
appear to be committed to the idea that WTE technology is the best
solution to the problem of waste management. However, these waste
energy plants have been tried and tested in several major Indian
cities and have been shown to fail.
Plants
in Delhi, Lucknow, Hyderabad and Mumbai were built at enormous cost
to the taxpayer. In Delhi, the plant, which was installed in 1984,
functioned for a few days but was closed down soon afterwards because
the waste being sent to the plant was not suitable to burn and so did
not produce enough energy.
Since
its closure the plant has stood idle but has swallowed up a huge
amount of valuable public funds in maintenance costs. The plant in
Lucknow also suffered similar problems and was subsequently closed
down. In Hyderabad the plant is up and running but at a huge cost and
is heavily subsidised.
What
is clear from India’s experience of WTE technology is that it
is not a viable option for the country. The reason these schemes
failed is because the type of waste produced in India is unsuitable.
Around 70%-80% of India’s municipal waste is organic, moist and
low in calorific value and therefore difficult to burn. This failure
has not stopped some people from advocating high-cost WTE technology
as the best way to deal with India’s municipal waste.
One
of the problems with WTE plants is that they require a massive
financial investment. The average cost of running a 5-megawatt plant
is Rs 40 crore. This means it costs on average Rs 8 crore to produce
just one megawatt of energy. The plants also require 150 tonnes of
urban waste to generate one megawatt of energy.
What
message does the use of these plants send to the people of India?
That it does not matter how much waste we produce or how we dispose
of it?
So,
if not WTE technology, what are the alternative solutions to India’s
burgeoning waste problem? Much of India’s waste is
biodegradable. Therefore segregating waste at its source, ie by
individual households, and composting biodegradable garbage is one
possibility. The Government needs to take active steps to encourage
householders to segregate their waste. Instead of throwing money at
expensive and inefficient WTE schemes, Government policy should focus
on simple, low-cost solutions like composting and recycling.
Defence
Colony, Delhi
A
community-based waste management pilot scheme was set up by Toxics
Link involving 1,000 households in A-block, in Delhi’s Defence
Colony. Due to restrictions on the availability of land, wet waste
for composting was collected from just 500 of the households. Teams
of two workers collected waste from 250 households each, making a
total of eight waste collectors for the whole of the block.
The
trial revealed that each household generated an average of 0.85 –
1.05 kg of waste each day. The total amount of waste produced by the
block and being sent to landfill sites was around one tonne per day.
Of
that waste, around 600-700 g was wet waste. Therefore each team of
two workers collected around 150-175 kg of wet waste per day, 350 kg
of which was composted.
Table
1 – Amount of Wet Waste Generated:
Households
|
WetWaste/HH/day
(g)
|
Wet waste in
Kg/day
|
Wet waste
tonne/day
|
Wet waste in
tonne/annum
|
Waste diverted
from landfill/day
|
500
|
600-700
|
300-350
|
0.3-0.35
|
109.50-127.75
|
300-350 Kg
|
1000
|
-Do-
|
600-700
|
0.6-0.7
|
219.00-255.50
|
600-700 Kg
|
4000
|
-Do-
|
2400-2800
|
2.4 – 2.8
|
876.00-1022.00
|
2400-2800 Kg
|
Recyclables:
Each
household produced an average of 250-350g of recyclable waste per
day.
The
total amount of recyclables collected from the block of 1,000 houses
each day was 250-350kg.
Table
2 – Amount of Recyclables Generated:
Households
|
Recyclables/HH/day(g)
|
Recyclables
(Kg)/day
|
Recyclable
(tonne)/day
|
Recyclable
(tonne)/annum
|
500
|
250 –350
|
125-175
|
0.125-0.175
|
45.625-63.875
|
1000
|
-Do-
|
250-350
|
0.25-0.35
|
91.25-127.75
|
4000
|
-Do-
|
1000 - 1400
|
1.0 – 1.4
|
365.0-511.0
|
Total
amount of waste diverted from landfill sites:
As
a result of the scheme around 600-700 kg of waste that would have
been sent to landfill sites each day was either composted or
recycled. This amounts to a saving of 200 tonnes per year.
Table
3 – Details of Manageable Waste:
Households
|
Wet waste/day (Kg)
|
Recyclable/day
(Kg)
|
Waste/day (Kg)
|
Diverted from
landfill/day
|
Approx.
Waste/annum
|
Approx. waste
diverted from landfill/annum
|
1000
|
600 -700
|
250 – 350
|
850 - 1050
|
850 – 1050 Kg
|
346.75 tonnes
|
346.75 tonnes
|
4000
|
2400 – 2800
|
1000-1400
|
3400 - 4200
|
3400 – 4200 Kg
|
1387.0 tonnes
|
1387.0 tonnes
|
If
the waste management model was rolled out for all 4,000 houses in
Defence Colony a total of 2,400- 2,800 kg or 2.4-2.8 tonnes of wet
waste per day could be prevented from going to landfill sites. This,
together with the recovery of recyclables, means a potential 2,650 –
3,150 kg or 2.6 – 3.0 tonnes of municipal solid waste could be
saved from landfills on a daily basis.
Cost
of recovery from recyclable waste:
Each
waste collector can make around Rs 50-75 a day from the sale of
recyclables. This is a potential income of Rs 400-600 per day from
the sale of recyclables from 1,000 households involved in the study.
Table
4 – Revenue Generation from Sale of Recyclables:
Households
|
No. of waste
collectors (WC)
|
Revenue/WC/day
|
Total revenue/day
|
1000
|
8
|
Rs.50 - 75
|
Rs. 400 – 600
for eight waste collectors
|
Long
Term Impact of the Scheme:
Increased
earning potential for waste collectors
Recognition
of the important work done by waste collectors
Rolling
out of the solid waste management model to other communities
Considerable
reduction in amount of waste being sent to landfill through
recycling and composting
Recovery
of natural resources
Strategies:
Secure
the active participation of Residents’ Welfare Associations
Introduce
occupational safety measures for waste collectors and facilitate
hygienic waste collection.
Use
the skills and experience of A-block to roll out the programme to
the rest of Defence Colony
Place
the system of waste management in the hands of waste collectors
Launch
an awareness campaign in schools and educate children in the best
practices of solid waste management
Constraints:
RWA
is active but very few residents take part in its activities
Lack
of segregation of household waste
Poor
relations between RWA and waste collectors
High
turn-over of RWA members
Limited
availability of land for segregation of waste and composting
Monitoring
and supervision of the programme
Marketing
of compost
Lack
of RWA funding for solid waste management schemes
Recommendations:
Encourage
community participation in solid waste management to create a sense
of ownership and sustainability
Involve
local schools as pupils can have an important role to play in
passing information on to parents
Formalise
the links between the local authority and communities which is a
necessary step for sustainability
Provide
incentives for communities to sign up to the scheme
Encourage
a sense of ownership among communities and waste collectors
Make
waste management a health and hygiene issue