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Carollo Treatment Plant Upgrade Wins APWA Award

September 8, 2014, 10:12 am
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APWA Award

Carollo recently designed blower and digester upgrades for Monterey Regional Water Pollution Control Agency (MRWPCA) as part of the Facility Upgrades Project. The Monterey Chapter of the American Public Works Association (APWA) lauded this project with an Award of Merit at their 2014 Annual Awards meeting. This Award of Merit is due to the significant energy savings realized by the extensive improvements made to the plant with the implementation of this project. Anir Bhagwat from Carollo was present at the function to receive the award alongside MRWPCA Project engineers and managers. Project team members: Anir Bhagwat, Rick Chan, Paul Friedlander, Andre Gharagozian, Aimee Laico.

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Becky Gherini

October 3, 2014, 1:52 pm
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Becky Gherini

This month's journal entry comes from Becky Gherini (Walnut Creek office), who handles complex electrical systems and sanitary sewer overflows with the same ease that she handles wild boars. Slightly different approaches, however. We are afraid to ask.

Click to read Becky's journal.
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Justin Fenton delivers outstanding client service

October 28, 2014, 3:11 pm
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Justin with John Bettencourt

Justin Fenton (Las Vegas office) was recognized by the City of Las Vegas for his outstanding contributions in providing cost saving solutions for the City. He recommended the use of existing pumps and structures for a bypass operation on the Reduced Loading project (currently providing third party CM services) that resulted in a $100K credit and avoided a $200K change order.

The City recognized Justin at their monthly Environmental Division employee meeting on October 15th. At this meeting, David Mendenhall, the Division Manager, recognizes his staff for “a job well done” and designates an employee of the month. It was a privilege for Justin to be recognized during this meeting, since it was before the division employees, many of whom he has developed personal relationships with while serving the City over the past couple years on the CM projects.

Justin continues to be a key employee on the City of Las Vegas projects, demonstrating his technical expertise, and representing Carollo in the fashion that John Carollo would be proud of -- outstanding client service!

Photo: Justin with John Bettencourt, P.E., Engineering Project Manager

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Carollo’s Vortex Screen Design Helps Sacramento Fight Drought

November 18, 2014, 2:53 pm
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California Department of Water Resources officials talk about the drought mitigation grants

As surface water levels drop in the wake of increasingly severe drought conditions, the State of California has earmarked $200 million in grant money for statewide drought mitigation projects. Carollo helped Sacramento City Department of Utilities maintain their river intake facilities by designing vortex breakers for their water supply pumps. On Thursday, November 6th, officials from the California Department of Water Resources used the pump station with its new vortex breakers as a background to talk about the drought mitigation grants and what other similarly affected communities plan to do to maintain adequate water supplies across the state.

Click here to read more and click here to see what these vortex screens look like underwater.

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Blue Plan-it™

January 8, 2015, 11:18 am
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A New Planning Tool Helps Paint a Clearer Picture for Municipalities

Carollo’s newest tool to help municipal service providers plan for the future and make good decisions is here! Blue Plan-it™ takes an agency’s vast quantity of data, including maintenance, geographic, regulatory, and financial information, and creates a customized graphical user interface that can be easily modified, understood, and presented.

View brochure

For more information, contact Charlie He or Eric McLeskey.

Carollo Engineers, Inc.
4600 E. Washington Street
Phoenix, AZ 85034
(602) 263-9500

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Hannah Thames

February 2, 2015, 11:38 am
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Hannah Thames

This month's journal entry comes from Hannah Thames (pronounced like it's spelled, not like the river in London) from our Orange County office, who tells a bit about what made her want to be a water engineer, what she's been doing with her time, and a little bit about what it means to surf a volcano.

Click to read Hannah's journal.
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John Rehring named Colorado's 2014 WateReuse "Person of the Year!"

February 2, 2015, 11:49 am
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John Rehring

While perhaps not as prestigious as Time's "Person of the Year" or ENR's "Sexiest Engineer Alive," being honored by WateReuse helps further demonstrate Carollo's leadership in this critical part of our industry.

The latest recipient of this honor is John Rehring (Denver - Broomfield office), noted CSM, Project Manager, and all-around really nice guy.

We congratulate John, though we point out in passing that being honored as the 2014 Person of the Year in December doesn't give him a lot of time to exploit his position. Hurry, John!  

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Carollo Helps Boulder Colorado With Carbon Optimization for Nutrient Reduction

February 16, 2015, 9:14 am
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Over the past year, Carollo has been helping the City of Boulder in Colorado determine how best to optimize internal carbon and leverage affordable supplemental carbon sources to improve nitrogen reduction. The City has identified a possible partnership with Avery Brewery for the use of waste weak wort as a cost effective carbon supplement. Carollo has completed the design of aeration basin modifications and a carbon feed facility that will store and dose waste weak wort or acetic acid to the process. This facility should be operational in 2016.

Follow this link to Denver’s local 9 News story for more details.

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'Hot' Water Treatment: Trending Technologies For Utilities

February 16, 2015, 11:19 am
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Jess Brown, Ph.D., P.E.

What are the key innovations that are actually being implemented, here and now, and creating a paradigm shift in water and wastewater treatment?

Jess Brown, VP and director of R&D for Carollo Engineers, tackled that question for Todd and Todd of Water Online Radio.

Brown first identifies the trends and drivers pushing new ideas to the fore, as well as potential obstacles. He then shares insight on emerging technologies that have long been in development, but are now finally being realized. Some examples include:

  • Waste-to-energy
  • Nutrient recovery systems
  • Computational fluid dynamics
  • Planning models
  • Biological drinking water treatment

"I know some clients that are targeting and are very close to actually removing themselves from the power grid, and generating all the energy they need on-site,” says Brown, touting the potential of wastewater as a resource.

“On the drinking water side, [we’re] leveraging nature to overcome some of the limitations we're currently facing in conventional drinking water treatment plants. That's really what biological treatment's all about, and I think that's a very exciting area that we'll see in the next decade.”

Learn more from Brown about Carollo’s efforts and the state of innovation in water/wastewater by tuning into the interview below.

Source: http://www.wateronline.com

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Holistic Look at Optimizing Biofilters and the Water Treatment Process

February 23, 2015, 9:59 am
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Nyfennegger, Jennifer, Jess Brown, Kara Scheitlin, and Chance Lauderdale
Published In: 
Florida Water Resources Journal
November 2014

Biofiltration for drinking water applications can offer many advantages with respect to operation of water quality. Biofilters are commonly used for particulate removal, but can also simultaneously remove multiple organic and inorganic compounds. However, even with the numerous benefits, drinking water biofilters can be prone to operational challenges. This article discusses these limitations and presents biofiltration control tools for preventing or overcoming these limitations. Pilot results from the optimization of Engineered Biofiltration strategies are discussed, as well as opportunities for the holistic optimization of the water treatment process.

http://issuu.com/fwrj/docs/1114_fwrj_web/0

Nyfennegger, J., J. Brown, K. Scheitlin, C. Lauderdale. 2014. "Holistic Look at Optimizing Biofiltration and the Water Treatment Process." Florida Water Resources Journal, Vol. 66, November 2014, Number 11, pp. 4-8.

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When Community and Insfrastructure Collide - Creating Long-Term Public Outreach Opportunities with Water Infrastructure Projects

February 23, 2015, 10:30 am
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Gutierrez, Richard, and Chris Cleveland
Published In: 
Water Environment & Technology
November 2014

This article is about a recent project for the City of West Sacramento, CA, which utilized water infrastructure elements as an educational outreach opportunity to inform customers and provide an asset, instead of a liability to the surrounding community. The project also sought to convey the value of water and provide a continuous outreach opportunity.

The residents of the City of Sacramento had been promised a park, which had to have an adequate potable water storage facility in place to meet the projected water demands and fire protection requirements. Constructing a 3-million gallon storage reservoir and pump station in the park would have potential for public opposition. For this reason, the City put in place an outreach program, which was an important element, from conceptual design to final design.

This article is about a recent project for the City of West Sacramento, CA, which utilized water infrastructure elements as an educational outreach opportunity to inform customers and provide an asset, instead of a liability to the surrounding community. The project also sought to convey the value of water and provide a continuous outreach opportunity.

The residents of the City of Sacramento had been promised a park, which had to have an adequate potable water storage facility in place to meet the projected water demands and fire protection requirements. Constructing a 3-million gallon storage reservoir and pump station in the park would have potential for public opposition. For this reason, the City put in place an outreach program, which was an important element, from conceptual design to final design.

WSacBridgeDist_WET_Nov14.pdf

Gutierrez, R., and C. Cleveland. "When Community and Infrastructure Collide – Creating Long-Term Public Outreach Opportunities with Water Infrastructure Projects." Water Environment and Technology. November 2014, pp: 31-35.

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Tips For Training Today’s Operator – And Making It Stick

February 23, 2015, 10:40 am
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Berlin, Jeff, and Steve Walker
Published In: 
Water Online
February 2014

​This article describes the three educational trends for operators' training that are gaining popularity as a means to improve training experience and the information retention of operators: Adult Learning; The User of Technology; and Flipped Classrooms.

When applied to operator training within our industry, these emerging educational trends have the potential to improve interest, engagement, and retention. This will result in motivated, more knowledgeable operators and more fficient treatment facilities overall.

http://www.wateronline.com/doc/tips-for-training-today-s-operator-and-ma...

Berlin, Jeff, and Steve Walker. "Tips For Training Today's Operator – And Making It Stick." Water Online. February 2014.

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Aging of Low Pressure Amalgam Lamps on UV Dose Delivery

February 23, 2015, 10:47 am
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Schmalwieser, Alois, Harold Wright, Alexander Cabaj, Mark Heath, Erin Mackey, Gunther Schauberger
Published In: 
Journal of Environmental Engineering and Science
April 2014

​To provide a more cost-effective UV disinfection, amalgam low-pressure high-output UV lamps (ALPHO lamps) were proposed as an alternative to low- and medium-pressure lamps in the 1970s. ALPHO lamps use an amalgam of mercury and other metals such as bismuth, indium, lead and tin, attached to the inside wall of the lamp's quartz envelope, to regulate the mercury vapor pressure within the lamp to optimal values. The regulation of mercury vapor pressure allows the lamps to operate at higher input power densities while maintaining relatively high electrical-to-germicidal energy conversion efficiently.

An important issue with all UV lamps is lamp aging, which impacts lamp life and UV output over time. UV systems are typically sized to deliver the required UV dose with the lamp output expected at the end of lamp life. Typically, the lamp output from the lamp is assumed to be uniform over the length and around the circumference of the lamp. However, visual observations of aged lamps show non-uniform lamp aging. Non-uniform aging for UV lamps potentially impacts UV dose delivery and it may also impact UV dose monitoring.

There are only a few published studies on the impact of lamp aging on UV output and none of them address the impacts of non-uniform lamp aging. This paper presents measurements of the spatial distribution of spectral irradiance from ALPHO lamps used in water disinfection as a function of operating time.

Schmalwieser, A., H. Wright, A. Cabaj, M. Heath, E. Mackey, and G. Schauberger," Aging of Low Pressure Amalgam Lamps on UV Dose Delivery." Journal of Environmental Engineering and Science, Volume 9, Issue JS2, pp: 113-124.

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One Problem, Many Causes – An Investigative Look at the Underlying Causes of Digester Foaming at a Dallas Wastewater Utility

February 23, 2015, 10:54 am
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Shimada, Toshio, Thomas Foster, Eva Gorgi, Krishna Pagilla, and Rodolfo Kilian
Published In: 
Water Environment &Technology
June 2014

Foaming in anaerobic digesters is a common problem for many water resource recovery facilities. While a small amount of foam in anaerobic digesters is normal and typically goes unnoticed, severe foaming can cause operations and maintenance problems such as clogging of gas handling equipment, tilting floating covers, and foam spills.

The Dallas Water Utilities (DWU) Southside Wastewater Treatment Plant has experienced recurring foaming events for several years. These foaming events have resulted in such problems as foam intrusion into the gas collection system and challenges in digester mixing. In addition, while DWU staff implemented intermittent digester mixing to reduce foaming, this has resulted in less-than-optimal mixing and reduced overall system performance.

As a result, a study was conducted to determine the causes of foaming and to evaluate alternatives for foam mitigation and control. This study provided multiple solutions to prevent or decrease the severity of digester foaming events.

Shimada_WET2014.pdf

​Shimada, T., Foster, T., Gorgi, E., Pagilla, K., Kilian, R. "One Problem, Many Causes: An investigative Look at Underlying Causes for Digester Foaming at a Dallas Wastewater Utility." WE&T. 26(6): 48-53. June 2014.

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A State of Urgency: Expanding Pipe Ratings for Sewer Pipe Triage

February 24, 2015, 10:57 am
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Buss, Robert, and G. Ishida
Published In: 
Water Environment & Technology
February 2015

Out of sight, out of mind” has been the normal approach in thinking (or not thinking) about buried underground sewer infrastructure, at least until there is a collapse in the street, the public is affected, and the unseen is revealed. The Albuquerque Bernalillo County (N.M.) Water Utility Authority experienced this phenomenon in the early 1990s with the sudden and seemingly random collapse of large-diameter sewer pipelines in various areas of its collection system. Collapses of the authority’s large interceptor pipes in major roadways occurred again in March and April 2011, and again in May and June 2012.

A careful evaluation of these collapses pointed to aging pipes whose useful lives had been reached or exceeded. Staff predicted that these collapses were only the beginning; more pipes would fail unless steps were taken to rehabilitate or replace them.

The water authority’s solution was to select a methodology that takes a thorough inventory of the condition of interceptors using risk-based, asset-management principles.

​Buss, Robert F., and G. Ishida. 2013.  "A State of Urgency: Expanding Pipe Ratings for Sewer Pipe Triage." WE&T. Volume 25, Number 7, pp: 39-42.

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Carollo Receives National Project of the Year Award

April 14, 2015, 4:21 pm
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WSBD Water Storage Facility and Park Project

Carollo’s design for the West Sacramento Bridge District Water Storage Facility and Park Project was selected as an American Public Works Association National Project of the Year. This project adds some much-needed water storage capacity to support local development while providing a public park and other amenities that serve and blend in with the surrounding community.

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Carollo Gets Some Well-Deserved Attention from ENR

May 27, 2015, 8:35 am
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The 2015 ENR rankings are out and Carollo jumped up an amazing 10 spots! This represents one of the largest single leaps of organic growth of the top 100 design firms ranked. It also puts rest to any debate about Carollo being the largest water-only design firm in the Country. ‘Cause we are. 

For dinner party conversation starters you can also tell folks that Carollo was ranked #14 in water (same as 2014), #10 in wastewater (up from #14 in 2014), and #45 in pure design firms.

Download PDF

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Presenting the Latest Carollo Book Club Selection

July 1, 2015, 4:05 pm
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​The Water Environment Federation’s new book, Ultraviolet Disinfection for Wastewater: Low-Dose Application Guidance for Secondary and Tertiary Discharges is out and ready to tell you all about the advantages and disadvantages of ultraviolet (UV) disinfection. Carollo’s very own Andy Salveson, Nicola Fontaine, Bill Sotirakos, and Keith Bourgeous are co-authors. The book offers case studies and provides design guidance for UV disinfection for low-dose applications such as disinfection of secondary and tertiary wastewater effluent. Click the link above to find out more or order your own copy!

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Guidelines for the Use of Stainless Steel in the Water and Desalination Industries

July 27, 2015, 8:53 am
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Mackey, Erin and Thomas Seacord
Published In: 
Water Research Foundation
July 2015

Public agencies struggle with the cost of desalination and water treatment projects, and expect expensive stainless steel materials to last as long as the bond payment period for their capital improvement projects (typically 20 to 30 years). However, the misapplication of stainless steel, which can lead to premature corrosion, continues to be a costly and common problem. Engineers and owners lack the resources to understand how to properly select these materials and specify the appropriate methods for their construction.

The central objective of this project was to develop guidelines for water and desalination engineers to help them:

  1. Understand the types of stainless steel used for different applications based upon water quality considerations.
  2. Properly specify construction standards that, if followed, will help extend the useful life of stainless steel materials to a period greater than 20 years.
  3. Identify appropriate operating conditions such that stainless steel corrosion can be avoided to the greatest extent possible.

Download the PDF

Mackey, E., and Seacord, T. "Guidelines for the Use of Stainless Steel in the Water and Desalination Industries." Water Research Foundation, Denver, Colorado. July 2015.

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Carollo’s biottta™ Process Named One of ACE15’s Top Tech Discoveries

July 29, 2015, 4:32 pm
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Water Online has come out with their list of the top 10 technology discoveries from the Annual Conference & Exposition (ACE), hosted by the American Water Works Association.  We were pleased to see that Carollo’s trademarked biottta™ treatment process was high on the list.

Click here to see the full story, and here to read our brochure explaining the technology and benefits of this innovative water treatment technology.

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