Now showing items 1-10 of 19
The roles and interactions of cations, proteins, and polysaccharides in the settling and dewatering of activated sludge
(Virginia Tech, 1995-08-05)
The roles of cations and exocellular biopolymer on the settling and dewatering of activated sludge was investigated. Both laboratory and full-scale activated sludge systems were examined. The results of the study showed ...
Characterization of a Creosote-Contaminated Tie Yard Site and the Effects of Phytoremediation
(Virginia Tech, 1998-06-15)
A creosote treatment facility was active during the 1950's and 1960's at a railroad tie yard site. In 1990, creosote contamination was discovered along a creek bank at the site. Phytoremediation was selected as the ...
The effects of ozone treatment on chemical parameters of a recirculating aquaculture system producing hybrid striped bass
(Virginia Tech, 1994-08-05)
The hypothesis tested in this study is that the application of ozone to reuse aquaculture water provides more favorable conditions for hybrid striped bass at production levels. Evaluation of water quality in fish culture ...
Biopolymer and Cation Release in Aerobic and Anaerobic Digestion and the Consequent Impact on Sludge Dewatering and Conditioning Properties
(Virginia Tech, 1998-08-27)
Sludge dewatering and chemical conditioning requirements were examined from the perspective of biopolymer and cation release from activated sludge flocs. Both aerobic and anaerobic digestion processes were considered ...
Study of Hydrocarbon Waste Biodegradation and the Role of Biosurfactants in the Process
(Virginia Tech, 1998-08-21)
Two types of oily waste sludges generated by a railroad maintenance facility were studied to reduce the volume of hydrocarbon waste. The specific goals of this laboratory study were to evaluate rate and extent of ...
Removal of trace elements from coal using a multiple-property processing circuit
(Virginia Tech, 1994-07-15)
<p>The U.S. Environmental Protection Agency is conducting a three-year study of toxic air emissions specific to coal fired utilities to assess the potential health risks of trace elements released during coal combustion. ...
Laboratory evaluation of conditioning requirements for sludge dewatering using belt filter press
(Virginia Tech, 1990-12-06)
Sorption of pentachlorophenol to humic acids and subsequent effects on biodegradation and solvent extraction
(Virginia Tech, 1992-06-05)
Effects of Grasses on the Remediation of Creosote-Contaminated Surface Soil
(Virginia Tech, 1999-05-05)
A grass phytoremediation field study was initiated in July 1997 at the site of a former railroad tie facility that used creosote for tie preservation. The site is contaminated with polycyclic aromatic hydrocarbons (PAHs). ...
The biodegradation potential of methanol, benzene, and m-xylene in a saturated subsurface environment
(Virginia Tech, 1993-03-15)
<p>The increased use of alcohols as gasoline additives, and possible substitutes, has prompted the investigation of the fate of gasoline/alcohol mixtures in the environment. In situ bioremediation is one technique that can ...