Apparatus for aeration without significant agitation to deplete and biodegrade sludge

12 Pages·2013·0.46 MB·English

US006461500B1
United States Patent
(12) (10) Patent N0.: US 6,461,500 B1
Hoage et al. (45) Date of Patent: Oct. 8, 2002
(54) APPARATUS FOR AERATION WITHOUT 4,732,682 A 3/1988 Rymal
SIGNIFICANT AGITATION TO DEPLETE 4,988,630 A 1/1991 Chen et 91
AND BIODEGRADE SLUDGE 5,194,144 A 3/1993 Blough
5,403,088 A 4/1995 Killmer et al.
Inventors: JLearrarryd A l‘3 I MHeosasgeer, FMati‘r ?Pelleda,s ant IA 5,413,765 AA : 5/1995 MSmoiotrhe heet aadl. et. ..a.l... ........ .. 209/169
’ ’ 5,458,816 A * 10/1995 Ebneret al. ............. .. 261/641
(Us) 5,490,187 A 2/1996 VanSiclen e161.
_ _ 5,690,976 A 11/1997 Nakayama
(73) Ass1gnee: Sewage Aeration Systems, Inc., 5,727,403 A * 3/1998 Na
Lockridge, IA (Us) 5,840,276 A 11/1998 Apfel
5,919,289 A 7/1999 Misawa et a1.
( * ) Notice: Subject to any disclaimer, the term of this 5,951,867 A 9/1999 Blough et al.
patent is extended or adjusted under 35 6,245,237 B1 * 6/2001 Blough et a1. ......... .. 210/221.2
U_S_C_ 154(k)) by 0 days' 2001/0013666 A1 * 8/2001 Nomura et al. ............. .. 261/93
2001/0022755 A1 * 9/2001 HoltZapple et a1. ....... .. 366/265
(21) Appl. No.: 09/945,222 * cited by examiner
(22) Filed: Aug. 31, 2001 Primary Examiner—Chester T. Barry
7 (74) Attorney, Agent, or Firm—McKee, Voorhees & Sease,
(51) Int. Cl. .............................................. .. B01D 47/02 PLC
(52) US. Cl. ..................... .. 210/150; 210/173; 210/220;
261/123; 261/91; 261/93 (57) ABSTRACT
(58) Field Of Search ............................... .. 210/150, 173, An improved method and apparatus for aeration of Septic
210/220; 261/123> 91> 93 tanks and the like. Because of the interrelationship of the
_ rotating impeller, an air plate and the horsepoWer of the unit
(56) References Clted in comparison With the volumetric siZe of the sludge tank,
U_S_ PATENT DOCUMENTS the unit disperses extremely small reduced pressure
microbubbles adjacent the area of the impeller. These
3,630,498 A * 12/1971 Bielinski .................. .. 210/219 reduced pressure microbubbles are thereafter dispersed
3562390 A 5/1972 Gnmshaw throughout the WasteWater by Brownian movement Without
3’677’229 A 7/1972 Blough et a1‘ ' ' h lud e. As a result there is substantiall
3,778,233 A 12/1973 Blough e161. i‘gltatmg t e S g ’ y
3,810,548 A 5/1974 B1 on gh increased lateral oxygen transfer to replace the oxygen used
4,244,531 A * 1/1981 szegvari by the aerobic bacteria. The sludge is therefore ef?ciently
4,333,796 A 6/1982 Flynn digested Without the need for huge, expensive and energy
4,519,959 A * 5/1985 Takeuchi et al. .......... .. 261/152 ine?icient equipment.
4,620,925 A * 11/1986 Allen ....................... .. 210/219
4,646,714 A * 3/1987 Bolin 2 Claims, 9 Drawing Sheets
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