Claims
- 1. A method of dewatering aqueous sludge, wherein said sludge consists essentially of a mixture of primary and secondary sludge from a pharmaceutical plant and secondary sludge from a chemical plant comprising adding to said sludge an effective amount for the purpose of a homopolymer comprising repeat unit moieties having the structure: ##STR2## wherein R is hydrogen or methyl and having an intrinsic viscosity from about 1.0 dl/g to about 2.9 dl/g as measured in 1M sodium chloride at 30.degree. C.
- 2. The method as defined in claim 1 wherein said homopolymer has an intrinsic viscosity from about 1.5 to about 2.0 dl/g.
- 3. The method as claimed in claim 1 wherein R is hydrogen.
- 4. The method as claimed in claim 1 wherein R is methyl.
- 5. The method as claimed in claim 1 comprising adding said homopolymer to said sludge in the amount of about 5 to about 40 pounds active polymer per ton of dry sludge.
- 6. The method as claimed in claim 1 wherein said homopolymer is added in an amount from about 100 parts per million to about 350 parts per million parts of said sludge.
- 7. The method as claimed in claim 1 wherein said dewatering aqueous sludge further comprises dewatering said sludge in a belt filter mechanism.
- 8. The method as defined in claim 1 wherein said dewatering aqueous sludge further comprises dewatering said sludge in a vacuum filter mechanism.
- 9. The method as claimed in claim 1 wherein said dewatering aqueous sludge further comprises dewatering said sludge in a centrifuge.
- 10. The method as claimed in claim 1 wherein said dewatering aqueous sludge further comprises dewatering said sludge in a lagoon.
Parent Case Info
The present application is a continuation-in-part of application Ser. No. 07/533,962 filed Jun. 6, 1990 now U.S. Pat. No. 5,100,561.
US Referenced Citations (9)
Foreign Referenced Citations (2)
Number |
Date |
Country |
1341972 |
Dec 1973 |
GBX |
1388399 |
Mar 1975 |
GBX |
Non-Patent Literature Citations (3)
Entry |
Textbook of Polymer Science; Billmeyer, Jr., 3d ed., pp. 208-213, Wiley & Sons, 1984. |
Betz handbook on Industrial Water Conditioning, 8th ed., pp. 253-256, 1980. |
Polyelectrolytes for Water and Wastewater Treatment; Schwoyer, CRC Press 1981, chapters 6 and 7. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
533962 |
Jun 1990 |
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