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Glossary (H)

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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Herreshoff furnace

Another name for a multiple hearth furnace
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Horizontal disc dryers

A type of conductive dryer based on externally heated discs or rings rotating in the sludge solids
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Hydraulic loading rate HLR

Amount of water fed into a process per process unit cross-sectional area per unit time
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Hydraulic resistance

Resistance to flow resulting from water flowing through a porous medium
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Hydraulic retention time HRT

Retention time of the liquid in a vessel
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Hydro-pyrolysis

Thermochemical treatment in the absence of water at elevated hydrogen pressures intended to favour the formation of biogas as the primary product
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Hydrochar

Solid charcoal-like product generated from non-oxidative thermochemical processes in the presence of water
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Hydrogenotrophic bacteria

Bacteria which feed off hydrogen
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Hydrolyse

React with water to break down large organic molecules into smaller, generally more biodegradable ones
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Hydrolysis

Reaction with water to break down large organic molecules into smaller, generally more biodegradable ones
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Hydrothermal carbonisation HTC

Low-temperature thermochemical treatment in the presence of water and absence of air favouring the formation of biochar as the primary product
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Hydrothermal gasification HTG

High-temperature thermochemical treatment in the presence of water and absence of air favouring the formation of bio-oil as the primary product
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Hydrothermal liquefaction HTL

Intemediate-temperature thermochemical treatment in the presence of water and absence of air favouring the formation of gas (syngas) as the primary product
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Hydrothermal processes HTP

Thermochemical treatment in the presence of water and absence of air

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This page was last updated on 23 April 2021

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