Name: ______
1.4.9 Human Impact on an Ecosystem 3
Waste Management Worksheet
Waste Management
What is waste management?
Waste management is the ______, ______, ______, ______or ______of waste materials, produced by ______, in an effort to reduce their effect on ______or local ______or ______.
It also tries to reduce waste materials' effect on the natural world and the environment and to recover resources from them.
Waste Management
•Urban rubbish is mostly ______.
•Traditional disposal has been to ______or ______.
Landfill operation
The area being filled has a rubberized landfill liner is in place (exposed on the left).
This prevents ______migrating downward through the underlying rock.
One of the following is necessary
Waste management in:
Agriculture
OR
Fisheries
OR
Forestry
Waste Management in Agriculture
The main problems here are the waste products from farms i.e.
•______
•______
•______/ ______use of chemical fertilisers and animal manures - excess of these may ______and cause ______and ______.
Agriculture solution
Spreading the slurry on the land as a fertiliser. This must be ______in order to ______for crop production and ______.
Soil Nutrient Programmes aim to ensure ______and ______by avoiding pollution from agriculture.
Soil Nutrient Programme
The amounts of fertiliser applied ______environmental damage.
When devising a fertiliser programme the ______on foot of regular soil testing.
There must be ______, both organic and inorganic.
______is very important to help ______in the soil.
Plastics on the farm
Plastic bags from fertiliser and plastic silage wrap strewn all around a farm is becoming ______.
Legislation on ______ensures that the ______and dealt with appropriately.
Waste Management in Fisheries
Fish waste from ______is a major pollutant of marinas and harbours.
Accumulated fish waste leads to:
-______
-Infestations of ______
-______
-Low O2 levels in the harbour water due to ______
Waste Management in Fisheries
Solid organic by-products of the fishing industry ______.
This has been ______by recent legislation and dumping at sea is not an option (EU regulation).
New projects are testing various methods of management of fish wastes e.g. ______, ______, ______of protein/oil etc.
Animal feeds and Oils
Fish offal is converted to ______and this is sold on as animal feed for e.g. chickens, pigs.
Some ______from the waste during the process and this is ______for further refining and then ______supplements.
Ensiling
The fish waste is ______and ______, then ______is added to it.
The resulting ______can be used for fertiliser.
Fish waste Composting
Composting of fish waste is becoming more popular now and it results in a ______that is odour free, stable and easily stored.
This will probably become the favoured option for the industry in the near future.
Waste Management in Forestry
•Leaves from coniferous trees should ______– make the water acidic
•______and ______should not be allowed run off into waterways - ______and ______
•When trees are harvested only bare poles are removed so a lot of ______(called ______) and the stumps are left behind
Forestry solutions
•Waste Management in the forestry sector is ______.
•When the trees are harvested ______are left behind.
•The stumps are sprayed with a ______which ______the decomposition process and
Forestry solutions
•The brash is either ______on the forest floor or collected and ______as a fuel source.
•In some of the larger sites the ______on for conversion to fibreboard e.g. MDF
Problems with Waste disposal
•Availability of ______
•The toxic or polluting content of fumes from ______(CO2, other acidic oxides and dioxins – produced from burning plastic)
•Decaying waste produces ______which contributes to the “greenhouse gases”
•Harmful substances may leak into ______(wells, lakes, reservoirs)
•Plants and animals in rivers and lakes are killed through direct ______or eutrophication
Possible solutions
•______and ______programmes for all ages are needed to ______to littering and waste minimisation and disposal
•Use micro-organisms to ______the rubbish and produce fuel pellets
•______the use of paper and ______more paper
•______(e.g. paper bags) should be used in place of plastic ones.
Possible solutions
•______has been placed on plastic bags in shops
•______makes disposal more efficient e.g. householders could separate metals, paper, plastic, glass for recycling and ‘vegetable’ waste for composting
•______to avoid ______production and fit ______inside chimneys
Suggestions for waste minimisation
•______– use less, minimise waste.
•______– use again, without changing but maybe for a different purpose.
•______– change, recover some material and use again.
Role of micro-organisms in Waste Management
______is an ______process during which micro-organisms decompose organic matter into a stable substance called compost which ______required for plant growth.
Since it is aerobic the organic waste mixture must be ______.
This increases the size and number of air pores.
Micro-organisms in Waste Management
______break down the ‘tougher’ materials in the waste such as ______and ______.
Their filamentous structure penetrates the composting material and helps to ______and ______in the compost heap.
Temperatures within a compost heap can reach ______as the bacteria and fungi work to breakdown the material.
Micro-organisms in Waste Management
______e.g. human viruses and infectious bacteria, are ______at ______
Because the temperature at the outside of the heap is cooler than in the centre it is important to ______pathogen and weed seed kill.
If the pile is unventilated the ______and the composting micro-organisms themselves are unable to survive.
Vermicomposting
This is another method of recovering the nutrients from organic waste, uses ______to consume the ______and utilizes the ______as compost.
Role of micro-organisms in Pollution Control
Composting can reduce ______caused by ______of ______in landfills and streams or by ______.
______break down organic matter into compost that recycles all the nutrients required for plant growth.
Need to know
•State problems associated with waste management & disposal.
•Explain the importance of waste minimisation.
•Explain the role of microorganisms in waste management and pollution control.
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