Engineering Inc. - March/April 2007 - 18

M U LT I - P R O J E C T FEATURE Digester Gas Co-generation Facility Meets Renewable Energy and Sustainability Goals Carollo Engineers T h e wastewater treatment plant that serves the Renton, Wash., area is more than 30 years old, but is depended on to treat more than 110 million gallons of wastewater a day. To achieve a much-needed plant modernization, the owners—the King County Department of Natural Resources—needed a method by which the plant would generate its own renewable energy and become self-sustainable. They turned to Walnut Creekbased Carollo Engineers. The firm’s main roles were to provide overall project coor- d i n a t i o n and to design the co-generation facility’s electric a l and mechanical systems. The design aspect called for the plant to produce electricity for its own use, have standby power in case of a utility outage, recover heat for the treatment process and not be subject to the volatility of the electrical grid. T h e company met several design challenges, including limited space inside the plant to situate the co-generation equipment, the integration of its electrical and mechanical systems into both the existing wastewater treatment plant and the facility’s one-megawatt fuel cell demonstration power plant, and the reliability of the existing electrical system. To deal with issues of space, Carollo examined alternatives that would minimize the impact of the installation of the existing buildings. “In addition, we chose technology and equipment with smaller footprints that would still perform as required,” says Sarwan Wason, a Carollo partner. Integration into the existing systems was achieved by minimizing the amount of external piping and wiring required, which made the installation easier, less dis- ruptive and more cost effective. Fi n a l l y, the challenge of meeting the goals of the electrical design was overcome by reconfiguring the plant’s electrical system with redundancies to improve both power reliability and quality. “The existing electrical system was reconfigured to provide the wastewater treatment plant with the ability to overcome utility power fluctuations without affecting the plant’s operation or sensitive electronic equipment,” according to Wason. Sarwan Wason Digester gas co-generation facility in Renton, Wash. 18 ENGINEERING INC. MARCH / APRIL 2007

Engineering Inc. - March/April 2007

Table of Contents for the Digital Edition of Engineering Inc. - March/April 2007

The BIM Boom
Legislative Action
News & Notes
Market Watch
Facilities Management for A/E Firms
Members In The News
The Path of Perseverance
One on One
ACEC Annual Convention
ACEC/PAC Achieves Record Fundraising Year
Cover Story: Alternative Energy
Re-Energizing the Industry
Contents
Business Insights
Helping Firms Manage Healthcare Costs
From ACEC to You
The Greening of Wal-Mart
Help Wanted: Leaders for Tomorrow
Engineering Inc. - March/April 2007 - Cover1
Engineering Inc. - March/April 2007 - Cover2
Engineering Inc. - March/April 2007 - Contents
Engineering Inc. - March/April 2007 - From ACEC to You
Engineering Inc. - March/April 2007 - 3
Engineering Inc. - March/April 2007 - News & Notes
Engineering Inc. - March/April 2007 - 5
Engineering Inc. - March/April 2007 - Legislative Action
Engineering Inc. - March/April 2007 - 7
Engineering Inc. - March/April 2007 - Market Watch
Engineering Inc. - March/April 2007 - 9
Engineering Inc. - March/April 2007 - Cover Story: Alternative Energy
Engineering Inc. - March/April 2007 - 11
Engineering Inc. - March/April 2007 - 12
Engineering Inc. - March/April 2007 - 13
Engineering Inc. - March/April 2007 - The Greening of Wal-Mart
Engineering Inc. - March/April 2007 - 15
Engineering Inc. - March/April 2007 - Re-Energizing the Industry
Engineering Inc. - March/April 2007 - 17
Engineering Inc. - March/April 2007 - 18
Engineering Inc. - March/April 2007 - 19
Engineering Inc. - March/April 2007 - 20
Engineering Inc. - March/April 2007 - 21
Engineering Inc. - March/April 2007 - The BIM Boom
Engineering Inc. - March/April 2007 - 23
Engineering Inc. - March/April 2007 - 24
Engineering Inc. - March/April 2007 - 25
Engineering Inc. - March/April 2007 - Help Wanted: Leaders for Tomorrow
Engineering Inc. - March/April 2007 - 27
Engineering Inc. - March/April 2007 - 28
Engineering Inc. - March/April 2007 - 29
Engineering Inc. - March/April 2007 - The Path of Perseverance
Engineering Inc. - March/April 2007 - 31
Engineering Inc. - March/April 2007 - 32
Engineering Inc. - March/April 2007 - 33
Engineering Inc. - March/April 2007 - ACEC/PAC Achieves Record Fundraising Year
Engineering Inc. - March/April 2007 - 35
Engineering Inc. - March/April 2007 - 36
Engineering Inc. - March/April 2007 - 37
Engineering Inc. - March/April 2007 - 38
Engineering Inc. - March/April 2007 - 39
Engineering Inc. - March/April 2007 - 40
Engineering Inc. - March/April 2007 - 41
Engineering Inc. - March/April 2007 - ACEC Annual Convention
Engineering Inc. - March/April 2007 - 43
Engineering Inc. - March/April 2007 - Helping Firms Manage Healthcare Costs
Engineering Inc. - March/April 2007 - Facilities Management for A/E Firms
Engineering Inc. - March/April 2007 - Business Insights
Engineering Inc. - March/April 2007 - Members In The News
Engineering Inc. - March/April 2007 - 48
Engineering Inc. - March/April 2007 - 49
Engineering Inc. - March/April 2007 - 50
Engineering Inc. - March/April 2007 - 51
Engineering Inc. - March/April 2007 - One on One
Engineering Inc. - March/April 2007 - Cover3
Engineering Inc. - March/April 2007 - Cover4
https://www.nxtbook.com/nxtbooks/acec/engineeringinc_spring2020
https://www.nxtbook.com/nxtbooks/acec/engineeringinc_winter2020
https://www.nxtbook.com/nxtbooks/acec/engineeringinc1119
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0919
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0719
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0519
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0319
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0119
https://www.nxtbook.com/nxtbooks/acec/engineeringinc1118
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0918
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0718
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0518
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0318
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0118
https://www.nxtbook.com/nxtbooks/acec/engineeringinc1117
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0917
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0717
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0517
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0317
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0117
https://www.nxtbook.com/nxtbooks/acec/engineeringinc1116
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0916
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0716
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0516
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0316
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0116
https://www.nxtbook.com/nxtbooks/acec/engineeringinc1115
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0915
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0715
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0515
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0315
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0115
https://www.nxtbook.com/nxtbooks/acec/engineeringinc1114
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0914
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0714
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0514
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0314
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0114
https://www.nxtbook.com/nxtbooks/acec/engineeringinc1113
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0913
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0713
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0513
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0313
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0113
https://www.nxtbook.com/nxtbooks/acec/engineeringinc1112
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0912
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0712
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0512
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0312
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0112
https://www.nxtbook.com/nxtbooks/acec/engineeringinc1111
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0911
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0711
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0511
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0311
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0111
https://www.nxtbook.com/nxtbooks/acec/engineeringinc1110
https://www.nxtbook.com/nxtbooks/acec/engineeringincSeptOct
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0910
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0710
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0510
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0310
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0110
https://www.nxtbook.com/nxtbooks/acec/engineeringinc1109
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0909
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0709
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0309
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0109_v2
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0109
https://www.nxtbook.com/nxtbooks/acec/engineeringinc1108
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0908
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0708
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0508
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0308
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0108
https://www.nxtbook.com/nxtbooks/acec/engineeringinc1107
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0907
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0707
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0507
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0307
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0107
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0505
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0305
https://www.nxtbook.com/nxtbooks/acec/engineeringinc1105
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0306
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0105
https://www.nxtbook.com/nxtbooks/acec/engineeringinc1103
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0906
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0903
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0703
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0106
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0506
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0503
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0303
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0904
https://www.nxtbook.com/nxtbooks/acec/engineeringinc1104
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0704
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0504
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0304
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0905
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0705
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0104
https://www.nxtbook.com/nxtbooks/acec/engineeringinc1106
https://www.nxtbook.com/nxtbooks/acec/engineeringinc0706
https://www.nxtbookmedia.com