Using Waste Foundry Sand for Hydraulic Barriers
Green sand is a mixture of uniformly graded fine silica sand, bentonite, and organic binders that is used to make molds for castings in gray-iron foundries. Large quantities of waste green...
Clearing the Air, Biologically
Using biofilters to reduce air pollution emitted from publicly owned treatment works is becoming more popular as owners realize how effective the systems are. The process cleans the air...
The Membrane Treatment
Innovations in the design and use of pressure-driven membranes can help municipalities reach stringent drinking water quality standards. Although membrane processes have been used successfully...
Filtration and Drainage in Geotechnical/Geoenvironmental Engineering
This proceedings,
Sludge's Re-Treat
The Shreveport, La., water treatment plant was losing up to 25% of the water it pumped into filter backwashing and sludge. Demopulos & Ferguson Associates (DFA), Shreveport, designed...
Permanent Runoff Controls
The Center for Research in Water Resources at the University of Texas, Austin, Texas, conducted tests showing that grassy swales can remove pollutants from highway runoff. Many pollutants...
Salvaged Sand
Waste foundry sand has been rediscovered as a road construction material now that environmental concerns about its use have been laid to rest. Certain types of waste foundry sand, a by-product...
Hydraulic and Engineering Considerations in Designing Constructed Treatment Wetlands for a Lake Restoration
A 12,600 ha (31,000 acre) hypereutrophic lake in central Florida is being restored by constructing a 2,020 ha (5,000 acre) wetland filter to remove suspended sediments and particulate...
Comparison of Methods for Sizing Secondary Treatment Filters for Wastewater
The trickling filter process in which a bacterial biomass is allowed to grow attached to a filter medium of rock or plastic is effectively used for removal of organic materials in domestic...
Anaheim State-of-the-Art Water Treatment Plant?Six Years from Conception to Completion
After six years of intensive planning, budgeting, pilot testing, design, and construction, the City of Anaheim, California, has successfully completed the modifications to the 15 mgd Lenain...
Selection of Sediment Transport Relations Part III: Numerical Ranking of Sediment Transport Relations
The emphasis of this paper is the methodology for the selection of sediment transport relations and is applicable for analysis of any sediment transport relation. However, to illustrate...
Recreational Impoundments Retrofit of Existing and Design of New Facilities
Water has been a critical component of most human endeavors, and its value as a recreational amenity is well-known. An increasing number of recreational impoundments are being considered...
Fish Passage Pool Bedding Analysis
Anadromous fish passages, stream dynamics and the artifical channel segmented into a natural stream should fttnction seamlessly. This paper intends to develop reasonable procedures a designer...
Soft Ground Improvement in Lowland and Other Environments
The presence of thick deposits of soft clay combined with the effects of ground subsidence cause problems for engineering constructions for lowland areas such as the Central Plain (Chao...
Designing for the First Flush
This article explains some of the details involved in separating the first flush of a storm event from the remainder of the storm. It also explains how to provide primary treatment of...
Modal Filter Based Structural Control of a Highway Bridge
An Adaptive Modal Filter (AMF) algorithm is developed which uncouples complicated multi-mode structural dynamic response into simple single-mode response. The application to active structural...
Linking Hydrodynamic and Biogeochemical Transport Models for Estuarine and Coastal Waters
Methodologies for linking estuarine and coastal hydrodynamic and biogeochemical transport models are reviewed and evaluated. The central premise of the review and evaluation is that intratidal...
Low-frequency Fluctuations of Suspended Sand and Wave Groups in the Surf Zone
Field observations of the sand suspension near the bottom in surf zone are presented and discussed. Calculated spectra of suspended sand concentration and wave envelope was found to be...
Cryptosporidium and the Milwaukee Incident
In early 1993, Milwaukee, Wisconsin reported a sharp increase in the number of diarrhea patients and shortage of over the counter drugs for diarrhea control at local pharmacies. This increase...
Assessing Roughing Filtration Design Variables
Rural communities are affected by the surface water treatment rule and are looking for inexpensive filtration options which are easy to operate and maintain. This paper evaluates roughing...
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