Comments for Access Water http://ch2mhillblogs.com/water Providing innovation and insight on all things water Tue, 21 Feb 2012 15:42:09 +0000 hourly 1 http://wordpress.org/?v=3.3 Comment on The New City by Heather Edmonds http://ch2mhillblogs.com/water/2012/02/21/the-new-city/#comment-4000 Heather Edmonds Tue, 21 Feb 2012 15:42:09 +0000 http://ch2mhillblogs.com/water/?p=3820#comment-4000 Amy, What a privilege and wonderful experience this must have been. I'm very inspired by your commitment to these students. It's encouraging to know that there are those engineers wanting to make a difference in the lives of our youth. Thank you for sharing! Heather Amy,

What a privilege and wonderful experience this must have been. I’m very inspired by your commitment to these students. It’s encouraging to know that there are those engineers wanting to make a difference in the lives of our youth.

Thank you for sharing!
Heather

]]> Comment on Pretreatment Trends in Seawater Desalination by Access Water http://ch2mhillblogs.com/water/2011/09/05/seawater-desalination-pretreatment/#comment-3998 Access Water Thu, 16 Feb 2012 01:54:01 +0000 http://ch2mhillblogs.com/water/?p=3051#comment-3998 Mr. Huehmer writes: Most of the history of pretreatment in seawater application has used direct filtration consisting of coagulation, in-pipe flocculation and media filtration. Increasingly, as we build plants in estuarial waters or at sites prone to Red Tide events, we have seen clarification technologies applied upstream of the filtration step. While the Pt Lisas Desalination Plant (Trinidad) uses a lamella settling process, most seawater desalination plants incorporating clarification are using high rate dissolved air flotation systems. This trend is being driven by several factors, including lower foot-print, increased removal of phytoplankton and other small marine organisms, and increased organic removal due to the affinity of organics to the air/water interface. I don't see conventional clarification becoming common in seawater applications due to the high foot-print and more expensive admixes required for seawater applications. In cases where there are high settlable solids content without algae/phytoplankton there may be a place for lamella processes. Mr. Huehmer writes: Most of the history of pretreatment in seawater application has used direct filtration consisting of coagulation, in-pipe flocculation and media filtration. Increasingly, as we build plants in estuarial waters or at sites prone to Red Tide events, we have seen clarification technologies applied upstream of the filtration step. While the Pt Lisas Desalination Plant (Trinidad) uses a lamella settling process, most seawater desalination plants incorporating clarification are using high rate dissolved air flotation systems. This trend is being driven by several factors, including lower foot-print, increased removal of phytoplankton and other small marine organisms, and increased organic removal due to the affinity of organics to the air/water interface. I don’t see conventional clarification becoming common in seawater applications due to the high foot-print and more expensive admixes required for seawater applications. In cases where there are high settlable solids content without algae/phytoplankton there may be a place for lamella processes.

]]> Comment on Pretreatment Trends in Seawater Desalination by Mats Johansson http://ch2mhillblogs.com/water/2011/09/05/seawater-desalination-pretreatment/#comment-3997 Mats Johansson Tue, 14 Feb 2012 17:58:07 +0000 http://ch2mhillblogs.com/water/?p=3051#comment-3997 Representing a Swedish supplier of lamella settling systems, I am eager to know your opinion of the clarification technology best suited for the pre-treatment. In what direction goes the trend? Conventional sedimentation, lamella settling or DAF? Representing a Swedish supplier of lamella settling systems, I am eager to know your opinion of the clarification technology best suited for the pre-treatment. In what direction goes the trend? Conventional sedimentation, lamella settling or DAF?

]]> Comment on An Inside Perspective of the Recently Announced International Water Summit by Michael E. Campana http://ch2mhillblogs.com/water/2012/01/21/international-water-summit-abu-dhabi/#comment-3983 Michael E. Campana Mon, 23 Jan 2012 16:34:24 +0000 http://ch2mhillblogs.com/water/?p=3687#comment-3983 I hope you do not neglect groundwater! I hope you do not neglect groundwater!

]]> Comment on Chattahoochee River Dam Removal and Ecosystem Restoration Project by David Thomason http://ch2mhillblogs.com/water/2012/01/09/chattahoochee-river-dam-project/#comment-3971 David Thomason Tue, 10 Jan 2012 15:19:30 +0000 http://ch2mhillblogs.com/water/?p=3646#comment-3971 No doubt that the success of this project is due in no small measure to the fine project management skills and good-natured personality of Mr. Klaus. Good work Joe! No doubt that the success of this project is due in no small measure to the fine project management skills and good-natured personality of Mr. Klaus. Good work Joe!

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