Method and facility for treatment of sludge derive from biological water purification facilities
First Claim
1. A process for treating excess sludge from a biological treatment system comprising:
- a. biologically treating water or wastewater and producing excess sludge;
b. solubilizing the sludge;
c. subjecting the solubilized sludge to a liquid-solid separation process and separating the solubilized sludge into a liquid fraction and a solid fraction;
d. at least partially digesting the liquid fraction and directing the at least partially digested liquid fraction to the biological treatment system for further treatment; and
e. solubilizing the solid fraction of the solubilized sludge.
2 Assignments
0 Petitions
Accused Products
Abstract
A process and system for treating excess sludge produced from a biological treatment system. The process includes biologically treating water or wastewater and producing excess sludge. The excess sludge is directed to a solubilizer where the sludge is solubilized. The solubilized sludge is directed to a liquid/solid separator, which separates the solubilized sludge into a liquid fraction and a solid fraction. The process further includes at least partially digesting the liquid fraction and directing the partially digested liquid fraction to the biological treatment system where the liquid fraction is subjected to further treatment. Finally, the solid fraction is subject to further solubilization.
29 Citations
35 Claims
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1. A process for treating excess sludge from a biological treatment system comprising:
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a. biologically treating water or wastewater and producing excess sludge; b. solubilizing the sludge; c. subjecting the solubilized sludge to a liquid-solid separation process and separating the solubilized sludge into a liquid fraction and a solid fraction; d. at least partially digesting the liquid fraction and directing the at least partially digested liquid fraction to the biological treatment system for further treatment; and e. solubilizing the solid fraction of the solubilized sludge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification