Now showing items 11-20 of 107
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 ...
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 ...
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 ...
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 ...
An Investigation into the Mechanisms of Sludge Reduction Technologies
(Virginia Tech, 2009-03-30)
Anaerobic digestion has been the preferred method for reducing and stabilizing waste sludge from biological wastewater treatment for over a century; however, as sludge volumes and disposal costs increase, there has been a ...
Sorption of pentachlorophenol to humic acids and subsequent effects on biodegradation and solvent extraction
(Virginia Tech, 1992-06-05)
Relationships Between Hybrid Poplar Tree Extractives and Ground Water Contamination at a Phytoremediation Site
(Virginia Tech, 2003-02-26)
<p> In 1997, a phytoremediation program began at a creosote-contaminated former railroad tie yard in Oneida, Tennessee with the planting of over 1000 hybrid poplar trees onsite. Creosote, a mixture of hazardous chemicals ...
Chemical and Biological Treatment of Acid Mine Drainage for the Removal of Heavy Metals and Acidity
(Virginia Tech, 1997-08-11)
This dissertation reports the design of a process (patent pending) to remove iron from acid mine drainage (AMD) without the formation of metal hydroxide sludge. The system includes the oxidation of ferrous iron in a ...
Increased Anaerobic Digestion Efficiency via the Use of Thermal Hydrolysis
(Virginia Tech, 2010-06-30)
Waste sludge is frequently treated by anaerobic digestion to kill pathogens, generate methane gas and reduce odors so the sludge can be safely land applied. In an attempt to reduce sludge volumes and improve sludge dewatering ...
Performance Evaluation of the Town of Monterery Wastewater Treatment Plant Utilizing Subsurface Flow Constructed Wetlands
(Virginia Tech, 2000-07-19)
Field tests were conducted and historical operating data were evaluated to assess the performance of the Monterey WWTP utilizing subsurface flow (SF) constructed wetlands. Previous work with SF wetlands has demonstrated ...