Method for the disposal of excess sludge
AssigneeAustrian Energy & Environment SGP/Waagner Biro GmbH
InventorsHeinz Loquenz, Wolfgang Glaser, Kurt Tamandl, Peter Yaldez
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Abstract
A method for incinerating excess sludge from biological waste water treatment plants, in particular sludges arising from the manufacture of paper or paper pulp, preferably using the magnesium fusion process. Before incineration, the excess sludge is neutralized with the same base as used in the paper pulp process and the dust entrained by the combustion gas is precipitated to recover the base.
Claims9
Method for disposing of sludge produced during waste water treatment in biological waste-water treatment plants with waste water neutralization operating with a magnesium oxide disintegration process for paper or paper pulp production plants comprising the steps of:
- neutralizing the waste water with a base before it enters an activated sludge installation in which sludge is produced,
- utilizing the same base for digestion of the paper pulp,
- incinerating the sludge directly or first mixing the sludge with a liquid fuel and then incinerating the mixture to generate a combustion exhaust gas,
- separating dust entrained in the combustion exhaust gas, and
- utilizing the dust or the neutralization product contained in the dust at least in part for the neutralization of the waste water.
Dependencies are inferred from the claim text.