Unit 3 - Key Area 2 (Water)

The breakdown of organic waste by microorganisms in the absence of oxygen.

Is gas produced from the breakdown of organic waste by microorganisms in anaerobic conditions.

Use of microorganisms to breakdown organic waste.

Waste water that includes water from toilets that needs to be treated extensively before it can be reused.

Method to improve water quality involving the addition of a chemical which makes smaller particles sticking together ma king them easier to remove.

A sustainable way to manage water resources involving removal of salt from water.

Method to improve water quality involving killing pathogens. (different in developed and developing countries)

A method of water conservation used in agriculture

Liquid waste or sewage that can be released into waterways.

Method to improve water quality involving the removal of bacteria, parasites and remaining suspended particles. (different in developed and developing countries)

Formed when tiny particles stick together.

Method to improve water quality involving making smaller particles stick together as a “floc” to allow them to be removed.

Waste water produced in homes that can be reused.

Something that can cause disease.

A multi stage process used to improve water quality.

Method to improve water quality involving removing larger pieces of debris from surface water.

Method to improve water quality involving the settling particles as sludge.

The liquid formed when the solids have been removed from sewage after sedimentation.

The solids removed from the sewage during sedimentation.