Example of Biodegradable Waste
The problem associated with solid waste began when the civilisation had just begun and it took a definite shape when man started living in groups or societies in settled communities.
The waste of primitive societies were not a huge problem before as it could be absorbed and dissipated by natural small process because the population densities were small and the available land was much bigger in comparison.
Beside this the nomadic habit of man made him move away from the waste he generated earlier.
With the development of mankind, the villages grew into towns and the cities became major townships and the common practice was to throw wastes into access ways, waterways and anywhere vacant.
All levels of development saw the production of domestic wastes, agriculture wastes, industrial wastes, medicinal wastes, and other miscellaneous wastes.
Its only the humans who typically discard waste that cannot be readily recycled and re-used by other parts of the biosphere.
The waste could be segregated into two major categories depending on the time it requires to completely re-cycle it.
It could be either bio-degradable or non-biodegradable wastes.
The bio-degradable waste included paper waste which might include all paper and paper made covering items and cartons, paper napkins, hardboard, cardboard, various wrappers and disposable paper plates.
Let us get into the details of Biodegradable Wastes.
1. Biodegradable wastes could be anything which decays or decomposes in which the ingredients break down into simpler substances by micro-organisms.
A bio-degradable waste changes like the following
(a) change in color and appearance and become liquidy or gaseous.
(b) Reduction in size or volume of the waste. As in case we have huge amount of leaves becoming a small heap.
2. Biodegradable wastes could be put to very good usage and it can be turned into compost which is basically a nutrient rich material used better by farmers in lieu of fertilizers.
(a) Compost could be prepared by allowing any bio-degradable waste to decay.
(b) These wastes are allowed to be broken down into simpler substances with the help of micro-organisms and turned into nutrients for crop fields.
3. Biodegradable wastes are also used for landfill purpose where it reduces to a nominal volume after sometime and so the same procedure could be repeated for years as the bio-compost is sold to the farmers for a small price and has better yield than chemical fertilizers.
Advantages of Bio-degradable Wastes
The following are the advantages of bio-degradable waste decaying.
1. The nutrients that are still left in the wastes are not left as such but are used in crop fields as manure and basically re-cycled back into the ecosystem.
2. The volume of waste also becomes less and could be disposed off easily either in form of crop field manure or in landfills.
3. The usage of chemical fertilizers is also brought down with the advent of bio-compost and is safer on human health as well.
4. Varieties of bio-degradable wastes helps in reducing the dependency on artificial materials which are either difficult to bio-degrade or convert it to manure.