Your web browser is out of date.

Update your browser for better security, speed and to get the best experience on this website.

Update your browser
Advert

Glossary (D)

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.

D
D

Decanter/Decanting centrifuge

Alternative term for solid bowl centrifuge
D

Denitrification

Biochemical conversion of nitrate to nitrogen gas
D

Denitritation

Biochemical conversion of nitrite to nitrogen gas
D

Dewatering

Removal of water from sludge to generate a non-flowing solids product (or 'cake')
D

Diaphragm/membrane press

Modification of filter press providing enhanced pressure by using an inflatable diaphram in the filter cells
D

Differential velocity

Difference in the rotational velocities of the screw conveyor and bowl of a centrifuge
D

Digestate

Residual solids, normally as a 20% solids slurry, from anaerobic digestion (AD)
D

Disc nozzle centrifuge

Centrifuge based on a series of stacked inverted cones
D

Dissolved air flotation DAF

Thickening process using precipitated air to encourage flotable suspended solids to rise to the tank surface, where they are removed by skimming
D

Dissolved carbon

Concentration of dissolved carbon in mg/L
D

Dissolved oxygen concentration DOC

Concentration of dissolved oxygen in mg/L
D
D

Drainability

Extent/rate of draining of water from settled sludge solids
D

Drum filter/screen

Cylindrical screen of a screw press through which filtrate passes
D

Dry carbonisation

Carbonisation (sludge thermochemical treatment favouring the formation of the solid phase as the primary production) in the absence of water
D

Dry solids DS

Solids content of sludge either as a percentage or in units of mass per unit volume
D

Dry thermochemical methods

Thermochemical treatment in the absence of water, normally comprising incineration, pyrolysis and gasification
D

Drying bed

Shallow beds with a porous base used to dewater sludge by draining
D

About this page

This page was last updated on 23 April 2021

Disclaimer

Information on this page may have been supplied by third parties. You are reminded to contact any third parties to confirm information is accurate, up to date and complete before acting upon it. SludgeProcessing.com accepts no liability for information provided by third parties, actions taken on the basis of this information or information held on third-party websites.

© Text copyright Judd & Judd Ltd unless otherwise indicated on this page

You are in:

Share or bookmark this page