Assessment of BNR Systems in Florida
Operating data from eight, full-scale, single-sludge, biological nutrient removal (BNR) wastewater treatment facilities in Florida were collected and evaluated. Three types of BNR facilities...
Automated ORP Control for Aerobic/Anoxic Cycling in Oxidation Ditch Treatment
The 1140 m3/d (0.3 mgd) Grand Coulee, WA. oxidation ditch was modified to incorporate a computer-control anoxic/aerobic cycle operation to investigate...
Modeling of Biofiltration of Natural Organic Matter in Drinking Water Treatment
A multi-substrate model of the biofiltration of natural organic matter in drinking water was developed and successfully applied. This model assumes that biofiltration is a two-step process...
Process Selection for Treatment of SOC Contaminated Waters
The most inexpensive method for treating synthetic organic chemical (SOC) contaminated wastewaters was studied. Air stripping, liquid-phase adsorption, fixed-film biological oxidation,...
Anaerobic Biodegradation of Chloroform under Methanogenic Conditions
The degradation of chloroform is studied for two different methanogenic cultures grown on acetate and methanol exclusively, as the primary substrates. In chemostats, chloroform was fed...
The Evaluation of Empty Bed Contact Time on the Biodegradation of Pentachlorophenol using an Anaerobic GAC Fluidized Bed
The objective of this research is to evaluate the effects of decreasing the empty-bed contact time (EBCT) on pentachlorophenol and its intermediates utilizing an anaerobic granular activated...
Biodegradation of 2,4-Dinitrotoluene in a Two Stage System
An anaerobic/anoxic fluidized-bed GAC bioreactor in series with an activated sludge reactor was used to treat 2,4-Dinitrotoluene (2,4-DNT). A simulated high strength wastewater solution...
Development of a Visual Method to Track the Movement of Hydrogen Bubbles in a Laboratory Flume
The current study proposes a visual method for tracking the hydrogen bubbles position with time in a 2-D space. The experiment is filmed from above with a video camera. The obtained movie...
High-speed Video Analysis of Sediment-Turbulence Interaction
Results from the analysis of high-speed video recordings of particle motion and simultaneous flow visualizations in the near wall region of a turbulent open channel flow are presented....
Visual Investigation of Field Bed-Load Sampling
An instrument for bed load sampling was developed consisting of an underwater video camera for visual observations. This instrument is called the Delft-Nile sampler and its design, efficiency...
Strain Measurement on the Runner of a Hydroelectric Turbine
Twelve strain gages were installed on the 10-m-diameter runner of Unit G-23 (700 MW) at Grand Coulee Dam, Third Powerhouse. The gages were located on both the pressure and suction sides...
Non-Intrusive Experimental Setup for Inflatable Dam Models
A method which allows for a non-intrusive evaluation of the dynamic response of the inflatable dams under overflow and impounding water conditions is presented. The internal pressure variations...
Observations on the Growth of an Internal Boundary Layer with a Lidar Technique
The distribution of atmospheric water vapor across a step change in surface humidity (dry-wet) was observed by a Lidar measurement technique under neutral atmospheric stability condition....
Multi-Reservoir Systems Optimization by the Aggregation/Decomposition Methodology
Studies on long term optimization of multi-reservoir systems are enhanced by the availability of closed-loop policies as available in Stochastic Dynamic Programming (SDP). SDP offers a...
Hydro Plant Research Data Acquisition System
The Colton Hydroelectric Development, located on the Raquette River in the northwestern part of New York State, is the site of a two year research project to test the use of heated trashracks...
Stochastic Control With Bounded Sample Paths: An Application to Reservoir Systems
The consideration of at least the first two statistical moments for the storage volumes of a reservoir system is crucial in an analysis aimed at determining the optimal operations policies...
Reforming Japan's Public Works
Japan's public works bidding system has traditionally been dominated by money politics and industry collusion, which has served to keep out small Japanese companies as well...
Water on Stone
Schal Bovis, a Chicago construction-services firm, has shown that Japan is not entirely a closed market. With more than a dozen major Japanese projects under its belt, it has broken through...
Development of Mechanized Wet Mix Shotcrete Application in Norwegian Tunnelling Industry
From 1971 to 1980 wet mix shotcrete won the Norwegian market 100%. In the same period hand held spraying was replaced by hydraulic manipulators. From 1980 to 1986, steel fibre use increased...
Wet Mix Shotcrete Used in Subsea Tunnel Environments
To reject the claim that the use of accelerator in shotcrete reduces the compressive strength with time, lately cored samples were taken from an 18 to 19 years old concrete. A wet mixed...
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