CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Gravitational drainage of compressible organic materials

Morten Lykkegaard Christensen ; Dominik Marek Dominiak ; Per Halkjær Nielsen ; Kristian Keiding ; Maria Sedin (Institutionen för kemi- och bioteknik, Skogsindustriell kemiteknik)
AIChE Journal (1547-5905). Vol. 56 (2010), 12, p. 3099–3108.
[Artikel, refereegranskad vetenskaplig]

A model was developed to simulate drainage of compressible particle suspensions, and study how cake compression and volumetric load influence the process. The input parameters were settling velocity, cake resistance and compressibility. These parameters were found using a new experimental method. Dextran-MnO2 particle suspensions were drained as these resemble organic waste slurries with respect to settling and compressibility. It was demonstrated that cake compressibility must be taken into account to obtain adequate simulations. This implies that pressurized filtration resistances cannot be used for drainage simulations. In the filtration step, a distinct increase of dry matter from top to bottom of the cake was observed. During the subsequent consolidation, the cake compressed and a uniform dry matter profile was found. The final dry matter content of the cake increased with feed concentration and volumetric load. The drainage time increased proportionally with feed concentration and, more importantly, proportionally with squared volumetric load.

Nyckelord: dewatering, settling, manure, sludge, specific cake resistance



Den här publikationen ingår i följande styrkeområden:

Läs mer om Chalmers styrkeområden  

Denna post skapades 2010-12-20. Senast ändrad 2011-03-07.
CPL Pubid: 131397

 

Läs direkt!


Länk till annan sajt (kan kräva inloggning)


Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Skogsindustriell kemiteknik (2005-2014)

Ämnesområden

Energi
Kemisk apparatteknik

Chalmers infrastruktur