155 research outputs found
Conceptual Flowchart of Bio-Regenerative Environmental Treatment for Health (BREATHe)I-air and water Subsystem - July 2003
No full text1 page
Provider Notes:Subsystem bioreactor 1 operation interpretation by Sybil Sharvelle
Related Documents: Potentially related to: WS109, WS28, WS24
Conceptual Flowchart of Bio-Regenerative Environmental Treatment for Health (BREATHe)II-air Subsystem - July 2003
No full text1 page
Provider Notes: Subsystem bioreactor 2 operation interpretation by Sybil Sharvelle
Related Documents: WS109, WS25, WS24b, WS2
Parameter Forms for Subsystems: Bio-Regenerative Environmental Treatment for Health (BREATHe)I-air and water and Bio-Regenerative Environmental Treatment for Health (BREATHe)II-air
No full text3 pages
Provider Notes:Subsystem parameters and diagrams gathered from meeting with Sybil Sharvelle
Related Documents:WS25, WS2
Bio-Regenerative Environmental Treatment for Health (BREATHe)II-air:Treatment of Grey Water Using Gas Biofilters
No full text19 slides
Provider Notes: Submitted by Sybil Sharvelle for Kathy Banks
Related Documents:Potentially related to WS24
Bio-Regenerative Environmental Treatment for Health (BREATHe)I-air and water and Bio-Regenerative Environmental Treatment for Health (BREATHe)II-air Summaries
No full text3 pages
Provider Notes:06/25/03 Data from interview at NSCORT workshop. 09/23/05 Meeting with Sybil S. and Eric M. about Breathe 1 (toured facility and discussed with ESM and other files). 11/29/05 Meeting about transient state and reliability data collection project (Attendees: Connie, Sybil, Eric, Jim, Al). Reliability: Breathe 1 will continue current experiments for Sybil\u27s PhD. Eric will begin talking with Luis about experimental design. Transient State: Discussed briefly. Zee needs to provide specific data requirements. 04/14/06 Met with Eric McLamore about using Sybil\u27s biofilter model in Jun Cai\u27s control work. Model is not available. 07/26/2006: Eric completed survey
Related Documents:WSR24a, WSR24
Bio-Regenerative Environmental Treatment for Health (BREATHe)I-air and water: Progress to Date and Future Plan
No full text11 slides
Provider Notes:Submitted by Sybil Sharvell
Graywater research findings at the residential level
No full text2014 Spring.Includes bibliographical references.As populations continue to grow and water supply sources become more stressed, innovative means for reducing our reliance on municipal water are becoming more prevalent. Graywater reuse is one water conservation practice which has the potential of reducing household water demands by 30% indoors and outdoors, depending upon irrigation demands. In areas where water scarcity is an ongoing challenge, implementation of graywater reuse practices is becoming more widely accepted. However, constituents commonly found in graywater may pose a threat to the environment or human health. The objective of this thesis is to present graywater research findings from 2003 to the present which have occurred as part of a graywater research program at Colorado State University. The research findings address issues and concerns raised regarding graywater and present the case for graywater reuse being a viable safe, simple and economical technology. In order for graywater reuse applications to continue to expand, the concerns regarding public health risks raised by regulating agencies and public health officials need to be fully addressed. Early research on a residential pilot graywater system for outdoor irrigation formed the foundation for more recent research targeting effects on soil quality (chemistry and microbiology), plant health, groundwater contamination, graywater quality and potential human health risks (Sharvelle, 2009, Shogbon, 2010, Neghaban-Azar, 2012). An optimal residential graywater system prototype for drip irrigation has been developed (Alkhatib, 2008) which includes two tanks, one for collection, coarse filtration and settling and the other for usable storage. The WERF study (Sharvelle et al., 2012) showed no need for disinfection of graywater being used for irrigation. The presence and levels of pathogens on field sites whether being irrigated with either municipal water or graywater were the same. The WERF research (Sharvelle et al., 2012) coupled with the prototype configuration supports no need for inclusion of disinfection as part of the treatment train when graywater is being applied for irrigation. The most recent research is a multi-residential graywater reuse demonstration project for toilet flushing completed on Colorado State University campus, Aspen Hall (Hodgson, 2012). Graywater used for toilet flushing will require a higher level of treatment due to the increased potential for exposure. Hodgson studied and selected Chlorine as the disinfectant for the residence hall. The resulting water quality with storage, filtration and disinfection determined by Hodgson achieves similar results as found in the 2003 residential pilot graywater system research which used UV rather than chlorine. The difficulty of navigating the varying graywater regulations between states drove Glenn's research (2012) into the graywater requirements for each state and who developed a tool for use by regulators to homeowners for finding an appropriate graywater technology to meet their local requirements. Also, a need was identified for providing a comprehensive guidance manual for separating graywater from blackwater for graywater reuse (Bergdolt, 2011). The manual provides design guidance and maintenance best management practices to ensure safe and appropriate graywater installation and operation
Effects of Water Conservation and Nutrient Source Reduction on Wastewater Treatment Facility Performance
No full textAs fresh water supplies continue to dwindle, many communities turn to water conservation measures. Water conservation is a low cost and simple way to combat the water supply deficit. This project used BioWin process modeling to evaluate the impacts of water conservation and nutrient source reduction on wastewater treatment facility performance. Several water conservation and nutrient source recovery scenarios were modeled using BioWin models of the Boulder, Longmont, and Metro wastewater treatment facilities. The modeling results suggest that water conservation may negatively impact wastewater effluent quality and that nutrient source recovery improves wastewater effluent quality. This project focused on the nitrogen and phosphorous effluent concentrations, due to the nationwide trend of more stringent effluent nitrogen and phosphorous concentration limits
Effects of Water Conservation and Nutrient Source Reduction on Wastewater Treatment Facility Performance
No full textAs fresh water supplies continue to dwindle, many communities turn to water conservation measures. Water conservation is a low cost and simple way to combat the water supply deficit. This project used BioWin process modeling to evaluate the impacts of water conservation and nutrient source reduction on wastewater treatment facility performance. Several water conservation and nutrient source recovery scenarios were modeled using BioWin models of the Boulder, Longmont, and Metro wastewater treatment facilities. The modeling results suggest that water conservation may negatively impact wastewater effluent quality and that nutrient source recovery improves wastewater effluent quality. This project focused on the nitrogen and phosphorous effluent concentrations, due to the nationwide trend of more stringent effluent nitrogen and phosphorous concentration limits
CLASIC: A Tool to Inform Decisions on Appropriate Application of Stormwater Control Measures
No full textThe Community-enabled Lifecycle Analysis of Stormwater Infrastructure Costs (CLASIC) tool has been developed to serve as a screening tool utilizing a lifecycle cost framework to support stormwater infrastructure decisions on extent and combinations of green, hybrid green-gray and gray infrastructure practices. The web-based tool is be geographical information system (GIS) interfaced and includes interaction with national databases to upload data for the modeled area, thus removing barriers associated with collection of data to serve as inputs. Three outputs are included to inform decisions on stormwater control measures (SCMs); (1) Hydrologic Performance, (2) Lifecycle Cost, and (3) Co-Benefits. CLASIC is interfaced with the Storm Water Management Model (SWMM) to provide the user with estimates of annual average runoff, infiltrated volume, and volume evapotranspired as well as pollutant load reduction. Life-cycle costs are estimated via construction, maintenance, and rehabilitation costs over a modeled project lifetime. Co-benefits are presented using the Triple Bottom Line (TBL) approach including social, environmental, and economic benefits realized by installation of combinations of SCMs. Scores in each TBL category are linked to hydrologic, water quality, and cost outputs from the tool and informed by multi-criteria decision analysis and user selected preferences. CLASIC has been beta tested by more than 50 potential users and is currently being enhanced to improve usability. The methodology applied by the CLASIC tool will be presented and the tool will be demonstrated
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