Glossary (H)

Another name for a multiple hearth furnace

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

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

Resistance to flow resulting from water flowing through a porous medium

Retention time of the liquid in a vessel

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

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

Bacteria which feed off hydrogen

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

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

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

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

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

Thermochemical treatment in the presence of water and absence of air