David R Stewart
Engineers in Fort Collins, CO
License number
Colorado 18250
Issued Date
Jun 17, 1981
Renew Date
Nov 1, 2015
Expiration Date
Oct 31, 2017
Type
Professional Engineer
Address
Address
3801 Automation Way Suite200, Fort Collins, CO 80525
Professional information
President &Amp; Ceo, Stewart Environmental Consultants, Inc.
Position:
President & CEO at Stewart Environmental Consultants, Inc.
Location:
Fort Collins, Colorado Area
Industry:
Civil Engineering
Work:
Stewart Environmental Consultants, Inc.
since 1985
-
President & CEO
Energy Water Soutions LLC
2011 - 2013
-
Chief Science Officer
Fort Collins Rotary
2005 - 2013
-
District 5445 Water Chair
Produced Water Developement LLC
2005 - 2013
-
CTO and Founder
Rotary International
1985 - 2013
-
Member
Rotary International
1983 - 2013
-
Member
EWB USA Board of Directors
2009 - 2011
-
Board President
Education:
Colorado State University 1990 - 2000
Doctor of Philosophy (PhD), Environmental Engineering Colorado State University 1990 - 1998
Master of Business Administration (MBA), Decision Strategy University of Arizona 1976 - 1978
Master's degree, Environmental Engineering Colorado State University 1974 - 1976
Doctor of Philosophy (PhD), Environmental Engineering Colorado State University 1990 - 1998
Master of Business Administration (MBA), Decision Strategy University of Arizona 1976 - 1978
Master's degree, Environmental Engineering Colorado State University 1974 - 1976
Pre-Sales Solution Architect At Hewlett Packard
Location:
Fort Collins, Colorado Area
Industry:
Computer Software
Skills:
Pre-sales, Enterprise Software, Cloud Computing, Integration, HP, Software Project Management
Methods To Remove Metals From Water
US Patent:
6348154, Feb 19, 2002
Filed:
Dec 31, 1997
Appl. No.:
09/001267
Inventors:
David R. Stewart - Fort Collins CO 80524
International Classification:
B01D 6100
US Classification:
210653, 210684, 210688, 210724, 210739, 210749, 210791, 210805
Abstract:
The present invention provides methods to remove metals from water in a cost effective and efficient manner using an inorganic cross-flow filter.
Purification Of Oil Field Production Water For Beneficial Use
US Patent:
2009020, Aug 13, 2009
Filed:
Apr 9, 2009
Appl. No.:
12/421462
Inventors:
David Rakestraw Stewart - Fort Collins CO, US
Assignee:
Produced Water Development, LLC - Fort Collins CO
International Classification:
G06Q 90/00, C02F 9/02, C02F 1/28, C02F 1/52, C02F 1/42, C02F 1/44
US Classification:
705 1, 210806, 210718, 210669, 210652, 210724
Abstract:
A method for generating new water with attached water rights comprising identifying a source of production water and treating the water in appropriate ways to provide water appropriate for beneficial use such as agriculture, irrigation, industrial or municipal or potable applications. Appropriate permits are obtained to create the new water with attached water rights.
Purification Of Oil Field Production Water For Beneficial Use
US Patent:
8097163, Jan 17, 2012
Filed:
Apr 6, 2007
Appl. No.:
11/784569
Inventors:
David R. Stewart - Fort Collins CO, US
Lawrence Y. C. Leong - Orange CA, US
Lawrence Y. C. Leong - Orange CA, US
Assignee:
Produced Water Development, LLC - Fort Collins CO
International Classification:
B01D 61/58, B01D 61/00
US Classification:
210653, 210650, 210652, 210651, 210628, 210723, 210408, 2105101
Abstract:
A method and system for purifying production water obtained from oil and gas operations so that the purified water need not be disposed of by forced injection back into the geological formation but can be put to a beneficial use such as agriculture, irrigation, industrial or municipal or potable applications. The production water is treated in a ceramic microfilter after it has been pretreated (preferably by aeration and with a walnut shell filter) to remove volatile hydrocarbons and heavier oils, such as paraffins and asphaltenes, that could foul the ceramic filter. The permeate from the ceramic microfiltration can then be treated with activated charcoal or otherwise treated to meet the specific requirements for the intended beneficial use.
Microfiltration Method And System
US Patent:
2012010, May 3, 2012
Filed:
Jan 12, 2012
Appl. No.:
13/349301
Inventors:
David Rakestraw Stewart - Fort Collins CO, US
Assignee:
PRODUCED WATER DEVELOPMENT, LLC - Fort Collins CO
International Classification:
C02F 1/44, C02F 1/42, C02F 1/00
US Classification:
210652, 210767, 210660, 210295
Abstract:
A microfiltration method and system for treating production water, for example, from oil and gas operations so that the treated water can be put to a beneficial user(s) such as agriculture, irrigation, industrial or municipal or potable applications. The production water is treated using a ceramic microfilter after pretreatment, for example, to remove volatile hydrocarbons and heavier oils, such as paraffins and asphaltenes, that could foul the ceramic filter. The effluent from the ceramic microfiltration can be further treated, for example, with activated charcoal or otherwise for the intended end use.