Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1997-10-24
1999-06-08
Therkorn, Ernest G.
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210639, 210651, 210652, 210728, 210734, 210735, 210915, C02F 144, C02F 156
Patent
active
059102519
ABSTRACT:
A process and system for removing heavy metals, fluoride, silica and other contaminants from large volumes of wastewater is disclosed. In the process, a wastewater stream containing the contaminant is treated with a chemical coagulant to create a particle having a diameter greater than 5 microns. Treated wastewater is passed through a microfiltration membrane which physically separates the metal contaminant particle from the wastewater. Commercially available microfiltration membranes having a pore size from 0.5 micron to 5 microns may be used. The treated wastewater flow rate through the microfiltration membranes can range from 700 gallons per square foot of membrane per day ("GFD") to 1500 GFD. Solids are removed from the membrane surface by periodically backflushing the microfiltration membranes and draining the filtration vessel within which the membranes are located. The dislodged solid material within the filtration vessel is flushed into a holding tank for further processing of the solids.
REFERENCES:
patent: 1324118 (1919-12-01), Hottinger et al.
patent: 3075645 (1963-01-01), Riddick
patent: 3097163 (1963-07-01), Riddick
patent: 3101317 (1963-08-01), Starry
patent: 3521752 (1970-07-01), Lindman
patent: 3544476 (1970-12-01), Aiba et al.
patent: 4159246 (1979-06-01), Matsumoto
patent: 4188291 (1980-02-01), Anderson
patent: 4207183 (1980-06-01), Herrigel
patent: 4246102 (1981-01-01), Hjelmner et al.
patent: 4260493 (1981-04-01), Kretas et al.
patent: 4420401 (1983-12-01), Kretas et al.
patent: 4618429 (1986-10-01), Herrigel
patent: 4731187 (1988-03-01), Moriya et al.
patent: 4780211 (1988-10-01), Lien
patent: 4938876 (1990-07-01), Ohsol
patent: 4957634 (1990-09-01), Bowers, Jr.
patent: 5043072 (1991-08-01), Hitotsuyanagi
patent: 5078900 (1992-01-01), Wegner
patent: 5108620 (1992-04-01), Wester et al.
patent: 5164095 (1992-11-01), Sparapany et al.
patent: 5171453 (1992-12-01), Communal
patent: 5182023 (1993-01-01), O'Conner
patent: 5205939 (1993-04-01), Syrinek
patent: 5215632 (1993-06-01), Fitts et al.
patent: 5246686 (1993-09-01), Cuer et al.
patent: 5501798 (1996-03-01), Al-Samadi
patent: 5510040 (1996-04-01), Miller
patent: 5556545 (1996-09-01), Volchek
patent: 5575915 (1996-11-01), Nakamura
patent: 5605633 (1997-02-01), Nakamura
S. A. Wasay, B. K. Puri and I. Haq, "Removal of Trace Heavy Metals by Metal Chelates", Intern. J. Environmental Studies, vol. 36, pp. 191-197 (1990).
G.B. Harris and S. Monette, "The Stability of Arsenic-Bearing Residues", presented at TMS-AIME Symposium, pp. 1-20 (Jan. 25-29, 1988).
T. Tesumi, M. Sumi, M. Tanaka and T. Shono, "Direct Reaction of Metal Powders with Several Sodium Dithiocarbamates", Polyhedron vol. 5, pp. 707-710 (Sep. 2, 1985).
T. Tetsumi, M. Sumi, M. Tanaka and T. Shono, "Reaction of Copper Powder with Tetraalkylthiuram Disulphides", Polyhedron, vol. 4, pp. 1439-1442 (Feb. 6, 1985).
Stanislav Miertus and Vladimir Frecer, Theoretical Study of the Electron Structure and Properties of Dithiocarbamates and their Complexes with Transmition Metals, Collection Czechoslavak Chem. Commun., vol. 49, pp. 2744-2750 (1984).
R. R. Scharfe, V. S. Sastri and C. L. Chakrabarti, "Stablilty of Metal Dithiocarbamate Complexes", Analytical Chemistry, vol. 45, pp. 413-415 (Feb. 1973).
Serge J. Joris, Keijo I. Aspila, and Chuni L. Chakrabarti, "On the Monobasic of Dibasic Character of Dithiocarbamic Acids", Analytical Chemistry, vol. 41, pp. 1441-1445 (Sep. 1969).
Keijo I. Aspila, Vedula S. Sastri and Chuni L. Chakrabarti, "Studies on the Stability of Dithiocarbamic Acids", Talanta Review,vol. 16, pp. 1099-1102 (Feb. 19, 1969).
Adam, Hulanicki, "Complexation Reactions of Dithiocarbamates", Talanta Review, vol. 14, pp. 1371-1392 (May 24, 1967).
M. J. Janssen, "The Stability Constants of Metal Complexes of Some N-Dialkyldithiocarbamic Acids--Part II. Copper Complexes in Ethanol/Water Mixtures of Various Compositions", Recueil, vol. 76, pp. 827-835 (1957).
M. J. Janssen, "The Stability Constants of Metal Complexes of Some N-Dialkyldithiocarbamic Acids--Part I. Copper Complexes in 75% (.sup.v /.sub.v) Ethanol Water", Recueil, vol. 75, pp. 1411-1422 (1956).
Allen Stephen D.
Lyman Leonard Rees
Microbar Incorporated
Therkorn Ernest G.
LandOfFree
Wastewater treatment process and apparatus for high flow fluorid does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wastewater treatment process and apparatus for high flow fluorid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wastewater treatment process and apparatus for high flow fluorid will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1681786