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Waste Water Treatment Plant

Anaerobic Digestion Terms

⁄ Total Solids
amount of material in the incoming

waste water stream ( < 1% of total volume)

⁄ Biochemical Oxygen Demand (BOD)
a measurement of the oxygen consuming potential
of wastewater, used as a performance measure

⁄ Chemical Oxygen Demand (COD)
a faster measurement of the oxygen consuming

potential of wastewater, similar to a BOD measure,
but less accurate (non-solids are also measured)

⁄ Anaerobic Digestion Anaerobic
Digesters capture
A biological process that utilizes micro-organisms, Many Methane at higher
in an Oxygen free environment, to decompose Variations Exist levels than
organic material Aerobic Digestion

⁄ Aerobic Digestion
A biological process that utilizes micro-organisms,
in open Air (with Oxygen present), to decompose

organic material

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