Jeffrey C Chen

US Patent:

7022233, Apr 4, 2006

Filed:

Jan 9, 2004

Appl. No.:

10/755073

Inventors:

Jeffrey J. Chen - Palo Alto CA, US

Assignee:

Severn Trent Services, Water Purification Solutions, Inc. - Colmar PA

International Classification:

C02F 3/30
C02F 3/06

US Classification:

210605, 210617, 210622, 210151, 210903

Abstract:

A biologically active reactor system for the treatment of wastewater comprises one or more submerged denitrification reactors having coarse media particles and a fixed biological film comprising biologically anoxic active microorganisms. One or more submerged aerated filters are in fluid communication with the one or more submerged denitrification reactor, the submerged aerated filter comprising coarse media particles and a fixed biological film comprising biologically aerobic microorganisms for oxidation of organic matter. One or more deep bed denitrification filters for removal of suspended solids and denitrification of oxidized nitrogens are in fluid communication with the one or more submerged aerated filters, the deep bed denitrification filter comprising fine media particles of less than 6 mm. Effluent from the submerged aerated filter is recycled to the submerged denitrification reactor for pre-denitrification prior to being piped to the deep bed denitrification filter. During the method, wastewater influent along with treated effluent from the submerged aerated filter is fed to a submerged denitrification reactor.

US Patent:

20130050264, Feb 28, 2013

Filed:

Aug 30, 2011

Appl. No.:

13/220725

Inventors:

Ankit Prasad - Palo Alto CA, US
Jeffrey Chao-Nan Chen - Cupertino CA, US
Onur Onder - Mountain View CA, US

Assignee:

MICROSOFT CORPORATION - Redmond WA

International Classification:

G09G 5/00

US Classification:

345643

Abstract:

Technologies are described herein for determining the display of equal spacing guides between diagram shapes. The nearest neighbors of each shape in a diagram are determined, and the distances between each shape and its nearest neighbors are calculated. When an active shape in the diagram is positioned or moved, spacing guides are displayed between shapes having equidistant spacing when the calculated distances between shapes become equal to a distance between the active shape and one of its nearest neighbors.