Sludge dewatering technology based on conveying sludge along the length of a cylindrical screen using an Archimedean screw
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Decay and putrefaction under anaerobic (i.e. oxygen-depleted) conditions
The velocity of a particle settling in water under gravity
Factor expressing the rate of increase and intensity of heat
Rate of imposed shear, the force associated with water flowing parallel to the particle or floc surface
Non-oxidative thermochemical treatment employing low heating rates and moderate temperatures favouring bio-char as the main product
Removal of water from sludge by evaporation at elevated temperatures
Reduction of odour, putrescence (i.e. decay) and pathogenic organism content of sewage sludge
Equipment for removing water from sludge through its evaporation at elevated temperatures
Sludge drying bed housed in a glass-based structure to allow control of the drying atmosphere
Centrifuge based on a rotating horizontal cylinder with a conical end where the sludge cake exits
Amount of solids fed into the reactor per volume per unit time
Percentage solids content or mass of solids per unit volume of sludge
Reduction of solids content of sludge through its decomposition to thermal products
Period of time the solids are retained in the reactor
Dissolving of matter in water
Hydraulic resistance of the cake formed from sludge solids to the passage of water through it
Measure of hydraulic resistance
See 'Sludge stabilisation'
Phase of the drying cycle where the sludge becomes sticky and challenging to manipulate
Region of the water temperature:pressure phase diagram above 218 bar pressure and 374 °C temperature in which water exists as a supercritical fluid or plasma
Another term for 'hydrothermal gasification'
Oxidation taking place in the supercritical region of the temperature:pressure water phase diagram (above 218 bar pressure and 374 °C temperature)
Diluted (water) upper layer produced when solids settle
Water associated with solid particles and bound to their surfaces by hydrogen bonding
Primary product of hydrothermal gasification (HTG), containing gaseous hydrogen and carbon monoxide as the primary constituents
A biochemical symbiotic relationship
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