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Pretreatment Optimization of Fiberglass Manufacturing Industrial Wastewater

Description: Wastewater effluent produced in the fiberglass manufacturing industry contains a significant amount of total suspended solids. Environmental regulations require pretreatment of effluent before it is discharged to the municipal wastewater treatment plant. Chemical precipitation by coagulation and flocculation is the method of pretreatment used at the Vetrotex CertainTeed Corporation (VCT). A treatability study was conducted to determine conditions at which the VCT Wastewater Pretreatment Plant could operate to consistently achieve a total suspended solids concentration ≤ 200-mg/L. Jar tests varied pH, polymer dosage, and ferric sulfate dosage. Total suspended solids and turbidity were measured to evaluate treatment performance. The data were used to determine an optimum set of conditions under project guidelines. Of twelve polymers screened, BPL 594 was selected as the most effective polymer. For cost efficiency in the wastewater pretreatment operation, recommendations suggested that treatment chemical injection be electronically controlled according to turbidity of the treated effluent.
Date: December 1998
Creator: Dragoo, Ron
Partner: UNT Libraries

Oral History Interview with Michael Crone, December 9, 2007

Description: Interview with Michael Crone, veteran of Operation of Iraqi Freedom, as part of the Tarrant County Veterans Oral History Project. The interview includes Crone's personal experiences of childhood in Texas, enlisting in the U.S. Marine Corps Reserves, boot camp at Camp Pendleton, California, training as a diesel mechanic, and being deployed to Kuwait and Al Asad, Iraq. Crone also talks about his family's tradition of military service, realizing that he would be activated and shift in reservist training following September 11 attacks, the birth of his first child while in Iraq, aspects of daily life for American soldiers stationed in Iraq, his work as a repair mechanic, and returning to the U.S. and his family.
Access: This item is restricted to UNT Community Members. Login required if off-campus.
Date: December 9, 2007
Creator: Elizondo, Kristina & Crone, Michael
Partner: UNT Oral History Program

The Change of Individual Opinions Through Gender-Related Group Influence: An Empirical Study of College Students

Description: The opinions of individuals may be influenced by groups of different gender configurations. This influence was studied by asking college students to respond to a series of statements in pretest and post-test settings. Post-test settings included the use of manipulatively constructed confederate groups to influence the subjects' responses. A pretest was administered in an anonymous nonthreatening environment. Within a week, the subjects were post-tested in a setting with four "confederates" who had previously been instructed to unanimously voice opposite answers to the subjects' initial responses to pretest questions. The objective of this experiment was to determine the number of opinions that were changed when confronted with opposing views. Change of opinions between pretest and post-test were considered to be operational definitions of "conformity."
Date: December 1986
Creator: Blodgett, Billy P. (Billy Paul)
Partner: UNT Libraries

The Effects of a Natural Disaster on Academic Abilities and Social Behavior of School Children

Description: Although most research has focused on adults, studies indicate that children also experience detrimental psychological effects as the result of natural disasters. The purpose of the present study was to determine if the tornado which struck Wichita Falls,, Texas, on April 10, 1979, had any negative effects on the academic performance or social behavior of school children. Three groups of students were studied: (a) victims of the tornado who suffered a significant loss, (b) observers of the disaster who did not suffer a significant loss, and (c) newcomers who arrived after the disaster. Achievement test scores, grades, and attendance over a 4-year period were studied. The overall results do not indicate significant differences among the three groups.
Date: December 1981
Creator: Little, Brenda Stephens
Partner: UNT Libraries

[News Clip: Jail Christmas]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story about Wichita Falls attorney Holly Crampton who was incarcerated for being in contempt of court and was given a Christmas holiday furlough by District Judge Charles Dickens and County Commissioner O.L. Watson to visit with her family. The story aired at 10:00 P.M.
Date: December 24, 1985
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections