Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Aerobic (1)
- Air (1)
- Air Quality (1)
- Anaerobic (1)
- Biodegradation (1)
-
- Biosolids (1)
- C&D landfill (1)
- Dewatering (1)
- Disinfection (1)
- Dispersion (1)
- Dispersion modeling (1)
- Ferrate (1)
- Flux chamber (1)
- Flux measurement (1)
- Gaussian (1)
- Homoacetogenic (1)
- Hydrogen sulfide (1)
- ISCST3 (1)
- Intersection (1)
- Methanogenic (1)
- Modal Emissions (1)
- Odor (1)
- Perchloroethene (1)
- Puff (1)
- Roadway (1)
- Sequential Environment (1)
- Simulation (1)
- TRAQSIM (1)
- Traffic (1)
Articles 1 - 4 of 4
Full-Text Articles in Engineering
Dewatering Of Biosolids By Sodium Ferrate, Andrea Rios
Dewatering Of Biosolids By Sodium Ferrate, Andrea Rios
Electronic Theses and Dissertations
This study was conducted to evaluate the effectiveness of the liquid form of ferrate for dewatering of biosolids from wastewater treatment facilities. Two different ferrate products prepared using calcium hypochlorite and sodium hypochlorite were used. Samples of anaerobic digested sludge and waste activated sludge with solids content of 2.1% and 0.95 %, respectively were conditioned with both products to evaluate and compare their effectiveness. Centrifugation and filtration of the sludge after conditioning were used. For centrifugation the volume reduction and the turbidity of the supernatant after centrifugation were evaluated. For filtration, the Capillary Suction Time test was used. The optimum …
Hydrogen Sulfide Flux Measurements And Dispersion Modeling From Constr, Sangho Eun
Hydrogen Sulfide Flux Measurements And Dispersion Modeling From Constr, Sangho Eun
Electronic Theses and Dissertations
Odor problems are a common complaint from residents living near landfills. Many compounds can cause malodorous conditions. However, hydrogen sulfide (h2s) has been identified as a principal odorous component from construction and demolition (c&d)debris landfills. Although several studies have reported the ambient concentrations of h2s near c&d landfills, few studies have quantified emission rates of h2s. The most widely used and proven technique for measuring gas emission rates from landfills is the flux chamber method. Typically the flux chamber is a cylindrical enclosure device with a spherical top which limits the gas emission area. Pure zero grade air is introduced …
Degradation Of Halogenated Aliphatic Compounds In Sequential Anaerobic, Scott Hoxworth
Degradation Of Halogenated Aliphatic Compounds In Sequential Anaerobic, Scott Hoxworth
Electronic Theses and Dissertations
The objective of this study was to utilize an alternating anaerobic/aerobic sequence to biologically transform perchloroethylene to non-hazardous end products such as ethylene, CO2 and H2 using a single microbial consortia in a methanogenic and/or a homoacetogenic environment followed by a aerobic methanotrophic environment. Reductive dechlorination of PCE and TCE to cDCE and VC in an anaerobic environment is typically carried out by methanogens, sulfidogens, or homoacetogens but often (e.g. in-situ) leads to an accumulation of daughter compounds (cDCE, VC) which are more toxic than their parent compounds (PCE, TCE). Furthermore, PCE is resistant to degradation in aerobic environments while …
Predicting Air Quality Near Roadway Intersections Through The Applicat, Brian Kim
Predicting Air Quality Near Roadway Intersections Through The Applicat, Brian Kim
Electronic Theses and Dissertations
With substantial health and economic impacts attached to many highway-related projects, it has become imperative that the models used to assess air quality be as accurate as possible. The United States (US) Environmental Protection Agency (EPA) currently promulgates the use of CAL3QHC to model concentrations of carbon monoxide (CO) near roadway intersections. This model uses steady-state and macroscopic methods to model the physical phenomena (e.g., emission rates, atmospheric dispersion, etc.) occurring at intersections. These methods are not straightforward and unintuitive for the users. Therefore, this project investigated the possibility of developing a model that is theoretically more realistic and flexible …