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US 12,110,243 B2Granted
Biofilm carrier media in moving bed biofilm reactor processes
AssigneeVeolia Water Solutions & Technologies Support
InventorsPer Magnusson, Christian Rosen
Life of this patent
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Abstract
The invention pertains to a bio-carrier to carry a biofilm in a moving bed biofilm reactor (MBBR), the carrier being a particle comprising dehydrated sludge. The use of a bio-carrier in a MBBR process to purify a liquid from contaminants is disclosed and a method of manufacture of a bio-carrier is provided.
Claims32
A bio-carrier for carrying a biofilm in a moving bed biofilm reactor (MBBR) comprising:
- the bio-carrier comprising a dehydrated sludge particle;
- wherein the bio-carrier is a virgin carrier and a mobile structure configured to support and carry a biofilm in a MBBR;
- wherein the dehydrated sludge particle has a nominal diameter of 0.7 to 7 mm, the dehydrated sludge particle has a volumetric mass density of 1.02 to 1.8 g/cm3, as determined by weighing the dehydrated sludge particle in air and then in ethanol (99.9 vol-%) at 20 0C and 1 atm, and the dehydrated sludge particle has a water content between 0 and 50 weight-%, as measured as water content fraction of the dehydrated sludge particle on total mass basis;
- wherein the particle has a settling velocity in the range of 0.02 m/s to 0.4 m/s in denatured ethanol (99.9 vol.- % ethanol) at 20 0C and 1 atm.
1 more element
A bio-carrier for receiving and supporting a biofilm in a moving bed bioreactor (MBBR), comprising:
- the bio-carrier comprising a dehydrated sludge particle;
- wherein the bio-carrier is a virgin carrier and a mobile structure;
- the dehydrated sludge particle having an outer surface configured to attach to and grow a biofilm in a MBBR;
- the dehydrated sludge particle having a nominal diameter of 0.7 to 7 mm;
- the dehydrated sludge particle having a volumetric mass density of 1.02 to 1.8 g/cm3, as determined by weighing the particle in air and then in ethanol (99.9 vol-%) at 200C and 1 atm;
- the dehydrated sludge particle having a dry solids content greater than 64 wt.- %;
- and the dehydrated sludge particle having a settling velocity in the range of 0.02 m/s to 0.4 m/s in denatured ethanol (99.9 vol.- % ethanol) at 200C and 1 atm.
4 more elements
Dependencies are inferred from the claim text.