US 9,809,480 B2
Wastewater treatment process and system
Robert John Stephenson, Vancouver (CA); Scott Christopher Laliberte, Vancouver (CA); Preston Yee Ming Hoy, Burnaby (CA); and Patrick William George Neill, North Vancouver (CA)
Assigned to Cypress Technologies Limited, West Vancouver (CA)
Filed by Paradigm Environmental Technologies Inc., Vancouver (CA)
Filed on Jul. 31, 2015, as Appl. No. 14/815,152.
Application 14/815,152 is a continuation of application No. 13/783,126, filed on Mar. 1, 2013, granted, now 9,145,315.
Prior Publication US 2015/0336831 A1, Nov. 26, 2015
Int. Cl. C02F 11/02 (2006.01); C02F 3/12 (2006.01); C02F 11/04 (2006.01); C02F 101/20 (2006.01); C02F 11/12 (2006.01)
CPC C02F 11/02 (2013.01) [C02F 3/1221 (2013.01); C02F 11/04 (2013.01); C02F 11/12 (2013.01); C02F 2101/20 (2013.01); C02F 2203/00 (2013.01); C02F 2203/004 (2013.01); C02F 2303/06 (2013.01); Y02W 10/15 (2015.05)] 63 Claims
OG exemplary drawing
 
1. A process for degrading sludge produced by treatment of wastewater comprising:
(a) providing an aerobic treatment system receiving a supply of said wastewater;
(b) treating a supply of said sludge by rupturing microbial cells present therein to produce treated sludge having an increased liquid:solid ratio and an increased degradation potential in comparison to untreated sludge;
(c) conveying a supply of said treated sludge to said aerobic treatment system; and
(d) substantially degrading said supply of said treated sludge in said aerobic treatment system,
wherein said aerobic treatment system receives said supply of said wastewater and said supply of said treated sludge, wherein said degrading of said treated sludge limits the rate of accumulation of sludge-derived solids in said aerobic treatment system during operation of said process,and wherein said sludge comprises aerobic sludge produced by said aerobic treatment system and wherein the net mass of solids present in said treated sludge degraded in said aerobic treatment system approximates the net mass of solids present in said aerobic sludge produced by said aerobic treatment system, thereby substantially avoiding net accumulation of solids in said aerobic treatment system during operation of said process.