Posts tagged technology
Boulder using new ultraviolet light technology to safely treat wastewater
Dec 7th
The new ultraviolet (UV) light disinfection system will replace the existing chlorine gas and sulfur dioxide gas systems, which have been in use since 1990 and pose a significant safety risk. The new technology is more efficient and eliminates the need to store and use hazardous gases. The UV light is a highly effective disinfectant for bacteria, viruses and protozoa.
“The new UV disinfection system is a major milestone for the facility and demonstrates the city’s commitment to continuous operational improvements that meet evolving community and regulatory needs,” said Director of Public Works for Utilities Jeff Arthur.
The Wastewater Treatment Facility improvements also include mechanical and electrical upgrades to the wastewater digester complex and headworks facility. The improvements are funded by a $9.2 million revenue bond and are expected to reduce long-term operating costs. Construction began in July 2011 and is currently on schedule to be completed in March 2013.
Wastewater from the community’s sanitary sewer systems is collected at the Wastewater Treatment Facility, where it is sent through a 20-hour, multi-stage treatment process. The facility treats an average of 12.5 million gallons of wastewater per day. In September 2012, the city’s Wastewater Treatment Facility received a Plant Performance Award from the Rocky Mountain Water Environment Association (RMWEA) in recognition of the facility’s commitment to outstanding maintenance, operations and public relations.
For more information about the Wastewater Treatment Facility improvements or to schedule a group tour, contact Wastewater Treatment Coordinator Chris Douville at 303-413-7341.
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Boulder Valley School District opens online forum
Oct 10th
October 3, 2012
Boulder, CO – The Boulder Valley School District has launched BVSD Listens, a new comprehensive community engagement website developed by MindMixer. It’s a place parents can engage, communicate and collaborate with the superintendent and school board – along with other residents – on where they see the district heading.
The goal is communication – involvement. Parents and community members who sign up with BVSD Listens will be part of the planning process on issues like the school year calendar and the role schools can play in Boulder’s future as a city.
BVSD Listens allows contributors a chance to share new ideas, second others’ ideas, expand upon existing ideas, give feedback on initiatives, and work with school leaders on a variety of topics online anytime, anywhere. The Boulder Valley Board of Education, Superintendent Bruce Messinger, and other key administrators at BVSD will be tuned in to the site.
The discussion has begun with the following topics and will branch off from there based on contributor input:
- Which calendar guiding principles are most important to you?
- What is the best way for the district to communicate with you?
- What is your favorite thing about Boulder Valley Schools?
- How do you see the public schools and the students they produce contributing to your vision of our community’s future?
BVSD Listens also measures and tracks participation, identifying the most interested citizens and most compelling topics. The tools make it easy for administrations to communicate back with parents, and they deliver measurable results and invaluable insight as plans move forward.
Nick Bowden, CEO of MindMixer, says,“ Our tools go beyond just technology. Our mission is to build community contributors. Ideas, voices, and perspectives are shared to facilitate deeper and better conversations that yield actionable insights and a stronger community.”
As part of its service, MindMixer consults and collaborates with clients to identify issues that are critical to stakeholders in order to update topics and content for their websites.
CU study: Graphene membranes may lead to enhanced natural gas production, less CO2 pollution
Oct 8th
The findings are a significant step toward the realization of more energy-efficient membranes for natural gas production and for reducing carbon dioxide emissions from power plant exhaust pipes.
Mechanical engineering professors Scott Bunch and John Pellegrino co-authored a paper in Nature Nanotechnology with graduate students Steven Koenig and Luda Wang detailing the experiments. The paper was published Oct. 7 in the journal’s online edition.
The research team introduced nanoscale pores into graphene sheets through ultraviolet light-induced oxidative “etching,” and then measured the permeability of various gases across the porous graphene membranes. Experiments were done with a range of gases including hydrogen, carbon dioxide, argon, nitrogen, methane and sulphur hexaflouride — which range in size from 0.29 to 0.49 nanometers — to demonstrate the potential for separation based on molecular size. One nanometer is one billionth of a meter.
“These atomically thin, porous graphene membranes represent a new class of ideal molecular sieves, where gas transport occurs through pores which have a thickness and diameter on the atomic scale,” said Bunch.
Graphene, a single layer of graphite, represents the first truly two-dimensional atomic crystal. It consists of a single layer of carbon atoms chemically bonded in a hexagonal “chicken wire” lattice — a unique atomic structure that gives it remarkable electrical, mechanical and thermal properties.
“The mechanical properties of this wonder material fascinate our group the most,” Bunch said. “It is the thinnest and strongest material in the world, as well as being impermeable to all standard gases.”
Those characteristics make graphene an ideal material for creating a separation membrane because it is durable and yet doesn’t require a lot of energy to push molecules through it, he said.
Other technical challenges will need to be overcome before the technology can be fully realized. For example, creating large enough sheets of graphene to perform separations on an industrial scale, and developing a process for producing precisely defined nanopores of the required sizes are areas that need further development. The CU-Boulder experiments were done on a relatively small scale.
The importance of graphene in the scientific world was illustrated by the 2010 Nobel Prize in physics that honored two scientists at Manchester University in England, Andre K. Geim and Konstantin Novoselov, for producing, isolating, identifying and characterizing graphene. Scientists see a myriad of potential for graphene as research progresses, from making new and better display screens and electric circuits to producing tiny biomedical devices.
The research was sponsored by the National Science Foundation; the Membrane Science, Engineering and Technology Center at CU-Boulder; and the DARPA Center on Nanoscale Science and Technology for Integrated Micro/Nano Electromechanical Transducers at CU-Boulder.
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