What is the full meaning of bio degradable and non bio-degradable wastes? and also residuals?

Question

what are the wastes that belongs to that kinds of wastes?

pls. make it in paragraph form, maybe 5 paragraphs is enough. thank you, i need pls, its urgent! tnx in advance.

Answer 1

Dreadful term - we teach with the broad and more meaningful term  "degradable in the natural environment".

'Biodegradable' is limited to breakdown of a material by biological agents: bacteria, enzymes, fungi, insects, other animals such as rodents. It is also begs the question do these agents exist in your compost heap, council landfill site, or the field (where trash is fly-tipped) OR what is good for the UK doe sit have any relevance in Southern Spain? This doesn't account for the contributing influences of water (liquid and vapour), ultra-violet radiation, oxidation, infra-red radiation (and other heat effects), etc. , one or several of these may be essential in promoting biodegradation.  For example the new biodegradable package material of choice, polylactic acid (PLA), has been reported not to biodegrade until it is softened ( >50C), but water absorbed by the polymer will make it soft at lower temperatures.  So unless a domestic compost heap  has the correct water content and gets to the correct temperature, a PLA sandwich box may stay intact for quite some time. Sainsbury's quoted composting time equivalent to that of a banana skin in the Today programme  2 summers ago - RHS at Wisley will tell you banana skins are amongst the slowest rotting vegetable/fruit materials in a compost heap....

One thing that particular worries me about so-called biodegradable materials is what they exactly break down to. The glib answer is CO2 and H2O - and then  the more anaerobic the decomposition area is, the more CH4 is generated. And the other materials left? Anecdotal reports over the last 25 years on  flexible polyurethane foams used in biodegradable products, indicate residual aromatic amines left in soils as well - these are suspected carcinogens. In other words there has not been enough research into the mechanisms of biodegradation of many biopolymers.

Almost by definition, non bio-degardable are those materials that don't degrade in the presence of agents of biodegradation.

Answer 2

Biodegradable waste can be broken down naturally over a short period of time.  Items like food, paper products, or anything organic.

Non-bio gradable waste cannot be broken down naturally as fast.  Items like glass, steel pots, or plastics.  Most items that are man made.

I think you can finish your homework with this information.