Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Reexamination Certificate
2006-05-02
2006-05-02
Hruskoci, Peter A. (Department: 1724)
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
C073S054310, C210S727000, C210S739000
Reexamination Certificate
active
07037433
ABSTRACT:
Systems and methods for polymer addition control for sludges from water and wastewater treatment. In a treatment process where flocculating agents are used to promote solids aggregation, intrinsic physical properties of the liquid rich stream following separation may be continuously measured in order to control or optimize the amount of flocculating or treatment agent that is added to the process. These intrinsic physical properties may include, for example, the flocculating suspension or network strength. By determining the floc strength using various treating agent dosages, a optimum treating agent dose can be determined. The optimum treating agent dosage is the minimum in a floc strength to polymer dose curve.
REFERENCES:
patent: 3738932 (1973-06-01), Kostenbader
patent: 4544489 (1985-10-01), Campbell et al.
patent: 4570478 (1986-02-01), Soong
patent: 4675116 (1987-06-01), Hoyland
patent: 4754640 (1988-07-01), Fitzgerald et al.
patent: 4985149 (1991-01-01), Ohshima et al.
patent: 5003814 (1991-04-01), Crawford et al.
patent: 5039428 (1991-08-01), Wentzler et al.
patent: 5084186 (1992-01-01), Gilchrist
patent: 5183562 (1993-02-01), Totoki et al.
patent: 5344570 (1994-09-01), McLachlan et al.
patent: 5382356 (1995-01-01), Thogho et al.
patent: 5427691 (1995-06-01), Kuyucak et al.
patent: 5561520 (1996-10-01), Williams
patent: 5620609 (1997-04-01), Field
patent: 5645799 (1997-07-01), Shah et al.
patent: 5792942 (1998-08-01), Hosokawa
patent: 5800717 (1998-09-01), Ramsay et al.
patent: 5846425 (1998-12-01), Whiteman
patent: 5902487 (1999-05-01), Pickering et al.
patent: 6083404 (2000-07-01), Sommese et al.
patent: 6110382 (2000-08-01), Wiemers et al.
patent: 6143183 (2000-11-01), Wardwell et al.
patent: 6210587 (2001-04-01), Vion
patent: 6447686 (2002-09-01), Choi et al.
patent: 6578780 (2003-06-01), Knauer et al.
patent: 6578781 (2003-06-01), Knauer et al.
patent: 6849190 (2005-02-01), Abu-Orf
patent: 2003/0111421 (2003-06-01), Abu-Orf
patent: 2003/0230538 (2003-12-01), Abu-Orf et al.
patent: WO 03/038350 (2003-05-01), None
patent: WO 03/051531 (2003-06-01), None
Abu-Orf et al., “Rheology as a Tool for Polymer Dose Assessment and Control,”J. Envir. Engrg. ASCE, 1999, 125, No. 12, pp. 1133-1141.
Abu-Orf et al., “Effect of Mixing on the Rheological Characteristics of Conditioned Sludge: Full-Scale Studies,”Water Sci. Techn.(1997), 36, No. 11, pp. 51-60.
Bache et al., “Viscous Behaviour of Sludge Centrate in Response to Polymer Conditioning,”Wat. Res., 1999, vol. 34, No. 1, pp. 354-358.
Campbell et al., “The use of rheology for sludge characterization,”Water Sci. Technol.(1982), 14, pp. 475-489.
Dentel, “Evaluation and role of rheological properties in sludge management,”Water Sci. Techn., (1997), 36(11), pp. 1-8.
Glascow et al., “An experimental study of floc strength,”J. AIChE, (1982), 28(5), pp. 779-785.
Hannah et al., “Measurement of floc strength by particle counting,”J. AWWA, Jan. 1967, pp. 843-858.
Higgins et al., “The effect of cations on the settling and dewatering of activated sludges: Laboratory results,”Water Environ. Res., 1997, 69(2), pp. 215-224.
Higgins et al., Dewatering and settling of activated sludges: The case for using cation analysis,Water Environ. Res., (1997) 69(2), pp. 225-232.
Langer et al., “Mechanisms of floc formation in sludge conditioning with polymers,”Water Sci. Tech., 1994, 30(8), p. 129.
Michaels et al., “The plastic flow behavior of flocculated kaolin suspensions,”Ind.&Eng. Chem. Fund., 1962, 1(3), pp. 153-162.
Novak et al., “The effect of cationic salt addition on the settling and dewatering properties of an industrial activated sludge,”Water Environ. Res., 1998, 70(5), pp. 984-996.
Novak et al., “The effect of shear on the dewatering of water treatment residuals,”J. AWWA, Nov. 1994, pp. 84-91.
Novak et al., “The effect of mixing on the performance of sludge conditioning chemical,”Water Supply, 1990, 8, pp. 53-60.
Novak et al., “Chemical Conditioning and the Resistance of Sludges to Shear,”Journal WPCF, Mar. 1989, vol. 61, No. 3, pp. 327-332.
Novak et al., “Chemical conditioning of activated sludge,”J. Environ. Engr., 1979, 105(5), pp. 993-1008.
Scott et al., “Rheology and Extrusion of Low-Grade Paper and Sludge,” Apr. 1999,TAPPI, pp. 685-690.
Tambo et al., “Physical characteristics of flocs-II strength of floc,”Water Res.1979, 13, pp. 421-427.
Yeung et al., “Micromechanics: A new approach to studying the strength and breakup of flocs,”J. Colloid and Interf. Sci., 1996, 184, pp. 579-585.
Yen et al., “Network strength and dewaterability of flocculated sludge,”Water Res., (2002), 36, pp. 539-550.
Ormeci et al., “Protocol to Measure Network Strength of Sludges and Its Implications for Dewatering,”J. of Env. Engr., ASCE, Jan. 2005, pp. 80-85.
Abu-Orf Mohammad
Ormeci Banu
Duke University
Hruskoci Peter A.
Stranco, Inc.
LandOfFree
Methods for water and wastewater sludge treatment using floc... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods for water and wastewater sludge treatment using floc..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods for water and wastewater sludge treatment using floc... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3598688