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EFFECT OF ACETIC OR CITRIC ACID ULTRAFILTRATION RECYCLE STREAMS ON COAGULATION PROCESSES
Title
EFFECT OF ACETIC OR CITRIC ACID ULTRAFILTRATION RECYCLE STREAMS ON COAGULATION PROCESSES.
Creator
Boyd, Christopher, Duranceau, Steven, University of Central Florida
Abstract / Description
Integrating ultrafiltration (UF) membranes in lieu of traditional media filters within conventional surface water coagulation-flocculation-sedimentation processes is growing in popularity. UF systems are able to produce low turbidity filtered water that meets newer drinking water standards. For typical drinking water applications, UF membranes require periodic chemically enhanced backwashes (CEBs) to maintain production; and citric acid is a common chemical used for this purpose. Problems may...
Show moreIntegrating ultrafiltration (UF) membranes in lieu of traditional media filters within conventional surface water coagulation-flocculation-sedimentation processes is growing in popularity. UF systems are able to produce low turbidity filtered water that meets newer drinking water standards. For typical drinking water applications, UF membranes require periodic chemically enhanced backwashes (CEBs) to maintain production; and citric acid is a common chemical used for this purpose. Problems may arise when the backwash recycle stream from a citric acid CEB is blended with raw water entering the coagulation basin, a common practice for conventional surface water plants. Citric acid is a chelating agent capable of forming complexes that interfere with alum or ferric chloride coagulation. Interference with coagulation negatively affects settled water quality. Acetic acid was investigated as a potential substitute for citric acid in CEB applications. A jar testing study was conducted to compare the impacts of both citric acid and acetic acid on the effectiveness of aluminum sulfate (alum) and ferric chloride coagulants. Citric acid was found to adversely affect coagulation at lower acid to coagulant (A/C) molar ratios than acetic acid, and a coagulation interference threshold was identified for both acids based on settled water turbidity goals recommended by the U.S. Environmental Protection Agency (EPA). Pilot testing was conducted to assess the viability of acetic acid as a UF CEB chemical. Acetic acid CEBs maintained pilot performance in combination with sodium hypochlorite CEBs for filtering a raw California surface water. It is believed that this is the first ultrafiltration membrane process application of acetic acid CEBs for municipal potable water production in the United States.
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Date Issued
2011
Identifier
CFE0003723, ucf:48779
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0003723
Performing Jason Robert Brown's The Last Five Years: An Exercise in Communication On Stage and Off
Title
Performing Jason Robert Brown's The Last Five Years: An Exercise in Communication On Stage and Off.
Creator
Sucharski, David, Niess, Christopher, Weaver, Earl, Boyde, Melinda, University of Central Florida
Abstract / Description
Communication, in its most basic sense, is foundational for any personal, human interaction and relationship. As theatre artists, we are charged with communicating complex story lines, conceptual ideas, and emotion to an audience. Sound communication is paramount to every aspect of a musical production, be it communication between actors/characters, actor and director, amongst the production team, and arguable the most important, between the actors and the audience. My years of education as a...
Show moreCommunication, in its most basic sense, is foundational for any personal, human interaction and relationship. As theatre artists, we are charged with communicating complex story lines, conceptual ideas, and emotion to an audience. Sound communication is paramount to every aspect of a musical production, be it communication between actors/characters, actor and director, amongst the production team, and arguable the most important, between the actors and the audience. My years of education as a Masters in Fine Arts candidate in Musical Theatre have been spent polishing my ability to communicate physical and emotional choices with greater accuracy, depth, and truth. By staging Jason Robert Brown's musical The Last Five Years and performing the role of Jamie, this performance thesis will explore, develop, and examine my mastery of the aforementioned varied forms of communication, all of which are necessary in building a successful musical production. Research will be conducted to gather information on relevant topics, including the history of The Last Five Years, the life of Jason Robert Brown, and his musical and theatrical influences. By further understanding Brown, his life, and his ideas about his works, I hope to more fully understand and communicate the message of the musical itself. A dramatic and musical structural analysis will provide further depth and insight into the piece, with the hopes of informing my production and individual performance. A thorough character analysis will provide connective tissue that will allow myself, as the actor, to more effectively communicate the psychological and emotional make up of the character Jamie. Lastly, the thesis document will culminate with a production journal, documenting the pre-production, rehearsal, and performance process. Through the journaling process, I will document and address the journey that I have experienced with the production, giving focus and attention to its many obstacles and discoveries, successes and failures, all of which have contributed to my personal growth as a young theatre artist.
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Date Issued
2012
Identifier
CFE0004324, ucf:49465
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0004324
White Males in Black Fraternities: Life Experiences Leading White Males to Join a Historically Black Fraternity
Title
White Males in Black Fraternities: Life Experiences Leading White Males to Join a Historically Black Fraternity.
Creator
Butts, Christopher, Cintron Delgado, Rosa, Owens, James, Boyd, Tammy, Welch, Kerry, University of Central Florida
Abstract / Description
This study was conducted to explore the phenomenon of White male membership in a historically Black fraternity. The researcher utilized a qualitative research methodology to investigate the pre-collegiate experiences of White males that influenced them to seek membership in Alpha Phi Alpha Fraternity, Inc. Due to the national pool of potential participants, interviews were conducted with White male members of this fraternity using video chat software. The researcher utilized social identity...
Show moreThis study was conducted to explore the phenomenon of White male membership in a historically Black fraternity. The researcher utilized a qualitative research methodology to investigate the pre-collegiate experiences of White males that influenced them to seek membership in Alpha Phi Alpha Fraternity, Inc. Due to the national pool of potential participants, interviews were conducted with White male members of this fraternity using video chat software. The researcher utilized social identity theory (SIT) as the framework for this study based on the premise that in-groups might prove to be significant. Examining the participants' pre-collegiate in-groups, diversity of family and family friends, and home environment provided insight into participants' reasoning for seeking membership. Additionally, exploring the participants' pre-membership perceptions of their eventual fraternity revealed further detail as to the extent to which individuals became members of the in-group associated with that fraternity. Findings for this study were that participants' comfort levels with diverse backgrounds and individuals allowed them to feel comfortable seeking membership in a Black fraternity. It was also found that shared traits of service and the opportunity for growth were reasons why White males sought membership in a Black fraternity.
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Date Issued
2012
Identifier
CFE0004342, ucf:49430
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0004342
Assessment, Optimization, and Enhancement of Ultrafiltration (UF) Membrane Processes in Potable Water Treatment
Title
Assessment, Optimization, and Enhancement of Ultrafiltration (UF) Membrane Processes in Potable Water Treatment.
Creator
Boyd, Christopher, Duranceau, Steven, Cooper, Charles, Randall, Andrew, University of Central Florida
Abstract / Description
This dissertation reports on research related to ultrafiltration (UF) membranes in drinking water applications. A pilot-scale investigation identified seasonal surface water quality impacts on UF performance and resulted in the development of a dynamic chemically enhanced backwash protocol for fouling management. Subsequent analysis of UF process data revealed limitations with the use of specific flux, transmembrane pressure (TMP), and other normalization techniques for assessing UF process...
Show moreThis dissertation reports on research related to ultrafiltration (UF) membranes in drinking water applications. A pilot-scale investigation identified seasonal surface water quality impacts on UF performance and resulted in the development of a dynamic chemically enhanced backwash protocol for fouling management. Subsequent analysis of UF process data revealed limitations with the use of specific flux, transmembrane pressure (TMP), and other normalization techniques for assessing UF process fouling. A new TMP balance approach is presented that identifies the pressure contribution of membrane fouling and structural changes, enables direct process performance comparisons at different operating fluxes, and distinguishes between physically and chemically unresolved fouling. In addition to the TMP balance, a five component optimization approach is presented for the systematic improvement of UF processes on the basis of TMP variations. Terms are defined for assessing process event performance, a new process utilization term is presented to benchmark UF productivity, and new measures for evaluating maintenance procedures are discussed. Using these tools, a correlation between process utilization and operating pressures was established and a sustainable process utilization of 93.5% was achieved. UF process capabilities may be further enhanced by pre-coating media onto the membrane surface. Silicon dioxide (SiO2) and powdered activated carbon (PAC) are evaluated as pre-coating materials, and the applicability of the TMP balance for assessing pre-coated membrane performance is demonstrated. The first use of SiO2 as a support layer for PAC in a membrane pre-coating application is presented at the laboratory-scale. SiO2-PAC pre-coatings successfully reduced physically unresolved fouling and enhanced UF membrane organics removal capabilities.
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Date Issued
2013
Identifier
CFE0005088, ucf:50758
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0005088