Method and arrangement for wastewater treatment
AssigneeAwama GmbH
InventorMichael Sievers
Life of this patent
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Abstract
The invention relates to a method and an arrangement for wastewater treatment, in which at least portions of the sewage sludge contained in the wastewater (0) are subjected to a hydrolysis (8). The hydrolysis (8) is carried out as a thermal hydrolysis. After the hydrolysis step (8), a drying process is (19) carried out. The drying process (19) is a process operating with positive pressure in the steam region. At least parts of the steam resulting from the drying process (19), which operates with positive pressure, are fed (20) to the portions of the sewage sludge in the thermal hydrolysis (8).
Claims21
A method for wastewater treatment, in which at least portions of sewage sludge contained in the wastewater are subjected to a hydrolysis,
- in which the hydrolysis is carried out as a thermal hydrolysis,
- in which, after the step of the hydrolysis, a drying process takes place, is hereby characterized
- in that the drying process is a drying process operating with an excess pressure in steam, and
- in that at least parts of the steam formed in the drying process operating with excess pressure in the steam are fed to the portions of the sewage sludge in the thermal hydrolysis.
An arrangement for wastewater treatment with a hydrolysis device for hydrolytic treatment of sewage sludge, and
- with a dryer for the drying of sewage sludge,
- is hereby characterized
- in that the dryer is a dryer operating with excess pressure in a steam range,
- in that a feed device for feeding the steam, which forms in the dryer operating with excess pressure in the steam range, to the hydrolysis device,
- in that the hydrolysis device is designed such that it mixes fed steam together with the sewage sludge, and
- in that the dryer is one of a steam dryer, a vaporization dryer and a fluidized bed dryer.
A system for wastewater treatment comprising, a hydrolysis device for hydrolytic treatment of sewage sludge, a dryer for the drying of the sewage sludge, said dryer configured to operate with excess pressure in a steam range, and a feed line fir feeding steam to the dryer, said hydrolysis device configured such that it mixes the fed steam together with the sewage sludge.
Dependencies are inferred from the claim text.