Hammering Out a New RCRA
Recent amendments to the Resource Conservation and Recovery Act (RCRA) add thousands of new waste generators and many new wastes to the list of those to be regulated. Some say RCRA is...
Is There Grit in Your Sludge?
Getting the grit out of municipal sludge can lower the total cost of operating a wastewater plant. Grit escalates maintenance costs and abrasive-laden sludge is costly to dispose of. Because...
Evaluation of Pretreatment and Sludge Disposal Plans
A spreadsheet model is developed to assist municipal managers in evaluating industrial wastewater pretreatment plans and sludge disposal criteria. A case study is presented....
Analysis of Drinking Water Systems: A Spatial Approach
This paper describes recent examples of spatial analyses as (1) a unifying concept for allocation of costs to various elements of water treatment and delivery; (2) a link and node (Network)...
Modeling of Microbially Active Soil Columns
A soil-based microbial treatment process for on-site treatement of hazardous industrial wastewaters has been developed. The indigenous microflora of the soil are supplemented by the addition...
Complications in the Design and Analysis of Small Water Distribution Systems
The design and operation of small treatment and distribution networks can sometimes be more complicated than the design of large metropolitan systems. More often than not, the use of standard...
Water System Model Brought Improvements in System Performance
Analysis of the hydraulic conditions of a multi-pressure zone water system serving portions of two counties in a mountainous region of Southwest Virginia was performed using computerized...
Water Use Forecasting and Evaluating the Effects of Conservation Measures
The City of Austin, Texas, instituted mandatory restrictions on water use during a summer drought in 1984 when water use levels beyond 150 million gallons per day stressed the city's...
Real-Time Control of Water Resource Systems
Successes in industry and manufacturing and preliminary experiences in the water resources field have documented the productivity and performance benefits obtainable with application of...
Diagnosis of Wastewater Treatment Processes
This paper presents an approach to the development of an expert system for aiding the operation of an activated sludge wastewater treatment facility. The expert system incorporates a diagnostic...
Microcomputer-Based Monthly Treatment Reporting
Massachusetts wastewater treatment plants must file monthly operating reports with the Massachusetts Division of Water Pollution Control. A microcomputer-based monthly reporting system...
Conceptual Framework for Regression Modeling of Ground-Water Flow
The author examines the uses of ground-water flow models and which classes of use require treatment of stochastic components. He then compares traditional and stochastic procedures for...
Computer Model for Wastewater Reclamation
This paper describes how an efficient computer model can be constructed and used to evaluate planning options for wastewater reclamation. The situation in the City of Scottsdale, Arizona,...
Groundwater Models in Choosing Water Treatment Methods
This paper presents an example of the use of groundwater models to identify the source of contamination and then design a treatment scheme. Included is a discussion of several different...
Dried Sludge for Fertilizer
Dried sewage sludge has been used as a fertilizer material for several decades in the United States. While sludge drying and fertilizer production is normally more costly than other municipal...
Manatee County Plans for Environmental Protection
Faced with a projected population increase of 53 percent by the year 2000, Manatee County, Florida, is protecting its water resources by developing a regional wastewater facilities program...
Research Needs in Land Application of Sludge?Hydrologic Effects of Soil-Sludge Interaction
The effects of wastewater sludge amendment on subsurface and surface flow regimes is discussed. The paper concludes with recommendations for further research on hydrologic effects of soil-sludge...
Desalination of an Impounded Estuary
The Sungei Seletar, an arm of a saline tidal estuary surrounding the Island Republic of Singapore, has been dammed for conversion to a freshwater reservoir. Calculations for predicting...
Nitrate Analysis Utilizing Groundwater Modeling
Groundwater is the sole source of potable water for the Town of Barnstable, Massachusetts. It is, therefore, of paramount importance to maintain the overall quality within acceptable drinking...
Groundwater Studies for Land Treatment Facility
A wastewater treatment facility currently under construction in Falmouth, Massachusetts, features a dual disposal method for land application of effluent. As the effluent disposal site...
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