Now showing items 11-20 of 107
Bioflocculation: Implications for Activated Sludge Properties and Wastewater Treatment
(Virginia Tech, 1998-07-23)
Studies were conducted to determine the role of bioflocculation in the activated sludge unit processes. Laboratory and full-scale studies revealed that bioflocculation is important in determining settling, dewatering, ...
Management strategy of landfill leachate and landfill gas condensate
(Virginia Tech, 2012-08-27)
Studies were conducted to evaluate the impact of landfill leachate discharge on the operation of waste water treatment plants (WWTPs). Two aspects of interferences were found: one is UV quenching substances, which are ...
Polycyclic Aromatic Hydrocarbons and Redox Parameters in a Creosote-Contaminated Aquifer
(Virginia Tech, 2001-02-05)
A groundwater monitoring study was conducted as part of a comprehensive program to remediate a former wood-preserving site that was contaminated with creosote. Twenty-five multi-level samplers (MLSs) were installed on-site ...
Sustainability of reductive dechlorination at chlorinated solvent contaminated sites: Methods to evaluate biodegradable natural organic carbon
(Virginia Tech, 2006-10-31)
Reductive dechlorination is a significant natural attenuation process in chloroethene-contaminated aquifers where organic carbon combined with reducing redox conditions support active dechlorinating microorganisms. At ...
Effect of liquid waste addition on the overall performance of anaerobic bioreactor landfill.
(Virginia Tech, 2008-03-18)
The effect of high organic liquid wastes on the overall performance of anaerobic bioreactor landfills is not known. In this study three different liquid wastes were added to mix of office paper, newspaper, cardboard and ...
Sorption of pentachlorophenol to humic acids and subsequent effects on biodegradation and solvent extraction
(Virginia Tech, 1992-06-05)
A Scrolling Geotextile Fabric Filter Device for Primary Clarification
(Virginia Tech, 2002-09-17)
This study investigated the feasibility of using a portable geotextile fabric based filtering device to remove suspended solids from raw sewage. This device was considered to replace a conventional primary clarifier. The ...
Factors affecting binding of chlorophenols to soil
(Virginia Tech, 1995-07-06)
Synthetic substituted phenols can become incorporated into soil organic matter by processes similar to natural humification. Biological, (enzyme-catalyzed), and abiotic, (mineral surface catalyzed), reactions have been ...
Enhanced petroleum-contaminated soil bioremediation by plants
(Virginia Tech, 1995-07-16)
<p>A petroleum-contaminated soil remediation study was conducted in a greenhouse. The system consisted of 36 pots, 12 were vegetated with squash, 12 were vegetated with fescue grass and the last 12 units served as unvegetated ...
Effects of surfactants on the biodegradation of toluene in soil
(Virginia Tech, 1989-09-05)
The objective of this investigation was to observe and evaluate the effects of surfactants on the biodegradation of toluene in the subsurface. Soil microcosms containing gasoline were used to simulate conditions of an ...