Cyclic Loading for the Measuring of Soil Consolidation Parameters
A method of determination of soil consolidation characteristics using sinusoidal loading is described. It can be performed in laboratory test or in situ observation as well, with different...
Compaction Grouting Stops Settlement of an Operating Water Treatment Plant
In early 1978, about a month into full-time operation, the new filter plant building for the water treatment plant for the City of Glenwood Springs, Colorado, experienced distress due...
Rate of Settlement of Silt Alluvium at Trojan
Settlements of 1.83 m have been observed at the switchyard of the Trojan Nuclear Power Plant over a 22-year period since 1970. Rockfill had been placed on the site, a flood plain of the...
Measuring the Benefits of Flood Risk Reduction
Property damages avoided, land price analysis, and contingent valuation were techniques used to estimate the economic benefits of flood risk reduction for residential land parcels in Roanoke,...
Controlling Lead and Copper Corrosion and Sequestering of Iron and Manganese
With the recently enacted Lead and Copper Rule (LCR), many utilities are faced with the conflict of meeting the requirements of the Rule and controlling aesthetic problems caused by source...
Modeling Issues of Copper Solubility in Drinking Water
The paper discusses the application of a model to the solubility of copper in drinking water. This paper is the result of numerous forms of pitting corrosion and pipe failures. Monitoring...
The Effects of NOM and Coagulation on Copper Corrosion
Copper corrosion was examined in solutions containing natural organic matter (NOM) and in situations where NOM was removed by enhanced coagulation with alum or ferric chloride. Electrochemical...
Water Chemistry of Lead Corrosion Control
Requirements of the Lead and Copper Rule (U.S. EPA) makes it necessary for regulators, consultants, and water purveyors to understand the fundamental relationships between water quality...
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...
Control of Microbial Water Quality in the Little Rock, Arkansas Distribution System
Beginning in the summer of 1993, seasonal studies were undertaken to evaluate the effectiveness of water treatment processes at Little Rock Municipal Water Works (LRMWW). Two treatment...
The Relationship of Speciation to Iron and Manganese Removal Strategies
Case studies are presented describing how Fe and Mn speciation procedures were used to solve process problems at two water utilities. A series of filtration steps are used to separate...
Comparison of Biological and Chemical/Physical Iron Removal
The report compares the efficiency of chemical/physical and biological iron removal processes during the entire filter cycle. The results of the first three pilot studies performed in...
Treatment of Oil in Water Emulsions by Ceramic-Supported Polymeric Membranes
A novel membrane was developed by growing polymer chains from the surface of a porous ceramic support, resulting in a composite membrane which combines the mechanical properties of the...
Immiscible Organic Liquid Recovery Using Unconfined Membranes
Hydrophobic hollow fiber micropourous membranes have been characterized and applied to the problem of separating and recovering low density hydrocarbons from water surfaces. The merits...
Waste Minimization and Recycling by Microfiltration during Nitrocellulose Manufacturing
A plant survey was conducted to determine the amount of nitrocellulose (NC) discharged with process water from each of five sequential NC purification processes. Wastewater samples were...
Meeting 503 Regulations for Ten Biosolids Incinerators (And Associated Stories)
This paper provides an overview of the Hampton Roads Sanitation District's Part 503 regulations compliance program regarding incineration of biosolids at five of its treatment facilities....
Clearing the Air About Sludge Incinerator Emissions
In 1990, a research needs assessment for wastewater treatment agencies conducted by the Water Environment Research Foundation recommended a three-year project to identify and quantify...
Beneficial Use Alternatives for Water Treatment Plant Residuals
The beneficial use alternatives which are currently in practice for water treatment plant residuals and their relative advantages and disadvantages are summarized in this paper. The alternatives...
Modifying One of the Nation's Most Successful Biosolids Lime Stabilization Operations
Since 1978, the Vallejo, California, Sanitation and Flood Control District has managed a tremendously successful biosolids program consisting of lime stabilization and agricultural land...
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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