assessment of solid waste management Flashcards
it refers to non-liquid unwanted/useless materials from domestic, trade, commercial, industrial, and mining activities and from public services
solid waste
also known as rubbish, refuse, garbage, junk (dust, food wastes, packaging in the form of paper, metals, plastics or glass, discarded clothing and furnishing)
how does solid waste contributes to environmental proble,s
as human beings produce domestic waste at all levels (kitchen waste, ashes from fires, broken utensils and worn out clothing)
biodegradable vs non biodegradable waste materials
BIODEGRADABLE WASTE MATERIALS
they can be broken down by biological processes and absorbed by environment
decomposers - fungi and bacteria, breaks down biodegradable material. once broken, they can be reused by other organisms
scavengers - vulture and insects help recycle organic waste
NONBIODEGRADABLE WASTE MATERIALS
it is made form synthetic materials and cannot be broken down by biological processes
synthetic materials are made by combining chemicals to form compound s that do not form naturally (polyester, nylon and plastic
plastics are made from
petroleum or natural gas (made of C and H) but in plastics, these elements are put tgt in molecular chains that r not found in nature
how long do plastic last for
last for hundreds of years
it is produced by mines, agriculture and industries that supply people with goods and services.
industrial solid waste
how does consumers indirectly create industrial solid waste
purchasing products that have been manufactured (scrap metals, plastics, paper, sludge and ash)
what waste is left from mining
rocks and minerals that are left exposed in large heaps is dumped in oceans or rivers or is disposed of by refilling and landscaping abandoned mines.
how much does agriculture waste make up of the solid waste
9% - the total solid waste produced and includes crop waste and manure
why is the increasing use of fertilizers and pesticides causes agricultural waste to become more difficult to dispose of
waste may be harmful if returned to the soil
these are garbage trash combined solid waste from homes and workplaces
MSW municipal solid waste
such as paper/ cardboard, food wastes, cans, bottles, glass, wood
it is most of what we throw out on a-day-day basis
MSW municipal solid waste
what is the percentage f residential waste of the municipal solid waste
56.7% - include kitchen scraps, yard waste, paper and cardboards, glass bottles
it threatens human health or the environment because it is poisonous, dangerously chemically reactive, corrosive and flammable.
hazardous/toxic solid waste
(industrial solvents, hospital medical waste, car batteries)
4 main aspects of solid waste management
storage at or near the point of generation
collection
cleansing
disposal