239000002699 waste material Substances 0.000 claims abstract description 36.239000000701 coagulant Substances 0.000 claims abstract description 38.230000001112 coagulant Effects 0.000 claims abstract description 38.XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48.239000007787 solid Substances 0.000 claims abstract description 74.238000000034 method Methods 0.000 title abstract description 40.239000010802 sludge Substances 0.000 title claims abstract description 212.Anticipated expiration legal-status Critical Status Expired - Fee Related legal-status Critical Current Links Application granted granted Critical Publication of US5575921A publication Critical patent/US5575921A/en Assigned to ASARCO INCORPORATED reassignment ASARCO INCORPORATED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ASKIN, RONALD C., KIMBALL, ROBERT J., YOST, SANNA M. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Hydrometrics Inc filed Critical Hydrometrics Inc Priority to US08/385,344 priority Critical patent/US5575921A/en Assigned to HYDROMETRICS, INC. Original Assignee Hydrometrics Inc Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Yost Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number US08/385,344 Inventor Ronald C. Google Patents Sludge dredging and dewatering processÄownload PDF Info Publication number US5575921A US5575921A US08/385,344 US38534495A US5575921A US 5575921 A US5575921 A US 5575921A US 38534495 A US38534495 A US 38534495A US 5575921 A US5575921 A US 5575921A Authority US United States Prior art keywords sludge tank solids thickened site Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US5575921A - Sludge dredging and dewatering process US5575921A - Sludge dredging and dewatering process
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