Glossary

At the end of each definition in this Glossary there is a number in brackets. This indicates the number of the Study Session where the term is first used in this OpenWASH module.


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B

bacteria

simple, single-celled microscopic organisms (2)


baseline data

data collected at the start of an intervention to provide comparison for the data collected later (15)


baseline position

the situation in an area before the start of an intervention (such as the launch of a WASH programme) (3)


biochemical oxygen demand (BOD)

amount of oxygen required by micro-organisms to break down the organic material in an effluent (4)


biodegradable

capable of being broken down by biological processes (7)


biodegradation

breaking down (decomposition) of organic substances by bacteria and other micro-organisms (4)


biogas

mixture of methane (about 60%) and carbon dioxide produced by decomposition of organic material by micro-organisms (5)


biogas latrine

type of latrine where the excreta undergoes anaerobic digestion to produce biogas (5)


blackwater

wastewater that contains urine and faeces (1)



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