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Glossary (A)

Updated on

Having problems with our terms and abbreviations? Use Ctrl+F to search our list of glossary items below. Contact us if you find a sludge abbreviation or glossary term you think it would be useful to add.

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Ablative reactor

Reactor configuration based on a rotating disc used for fast pyrolysis
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Acetogenesis

Biochemical conversion of volatile fatty acids to acetic acid and mineral products
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Acetotrophic

Bacteria which feed off acetate
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Acidogenesis

Conversion of small organic molecules to volatile fatty acids
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Aerobic

In the presence of oxygen
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Aerobic digestion

Sludge degradation in the presence of oxygen
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After burner

Region above a thermochemical fluidised bed reactor where thermal oxidation takes place
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Agglomerate

Action of agglomeration (v) or a single particle (or floc) formed from a collection of coalesced/aggregated particles
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Agglomeration (of particles)

Coalescence or aggregation of particles to form larger ones
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Air to solids ratio

Mass of air employed per unit mass of sludge solids in a dissolved air flotation process
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Alkaline stabilisation

Stabilisation of sludge based on lime dosing
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Alum

Aluminium sulphate
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Anaerobic

In the absence of oxygen
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Anaerobic digestion AD

Sludge degradation in the absence of oxygen
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Annamox

Anaerobic ammonium oxidation
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Annular gap

Ring-shaped gap between two concentric cylinders
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Antimicrobial resistant genes ARG

Genes which enable microbes to resist chemicals which are designed to attack them

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Archimedean

Type of large screw used for conveying solids or liquids though a cylindrical conduit
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Ash

Solid product stream generated from incineration
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Aspect ratio

Length to diameter
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Auger/screw reactor

Pyrolytic reactor configuration using a turning screw to transport the solids through the reactor
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Autothermal

Sustained by the heat generated

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This page was last updated on 23 April 2021

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