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Saving Time and Money with Archaeology
In the past 20 years, archaeology has become a necessary part of many engineering projects. However, this aspect of a project is often regarded as an obstacle in terms of costs and time....

A Computer Aided Approach to Missing Time-Series Data Replacement
The objective of this research is to design, construct, and demonstrate a computer utility which will interactively aid the time series researcher in choosing an appropriate missing data...

Impacts of Stormwater Runoff on Receiving Waters
A planning methodology to assess the impact of stormwater runoff on streams in Vermont is demonstrated. The methodology, which is based on a statistical representation of runoff and stream...

Measurement of Activated Sludge Rheology
Rheological measurements provide fundamental information on the physical properties of activated sludge. Such properties influence the behavior of activated sludge in wastewater and sludge...

Understanding Secondary Clarifier Behavior
The author has developed a graphic procedure for analyzing the hydraulic behavior of settling tanks. Data have been used in numerous cases to devise low cost in-tank and external improvements...

Treatment of the Wastewater From the Alkaline Cooking of Maize in an RBC System
The liquid waste resulting from cooking and washing of maize is called nejayote or nexayote. The soluble COD concentration of this waste ranges from 10,000 to 20,000 mg/l. In an effort...

Program for Control of Petroleum Refinery Wastewater
The Sanitation Districts of Los Angeles County (LACSD) provide wastewater treatment services to approximately four million residents and eight thousand industrial companies. Large and...

Maintenance Management for a Large Urban Waterworks System
The Boston Water and Sewer Commission (BWSC) owns and operates a water distribution system consisting of 86,000 customer accounts and 1,100 miles of water mains. In 1984, BWSC initiated...

A Stepwise Approach to Environmental Systems Maintenance Management
This paper provides a systematic approach to establishing a maintenance management program for environmental infrastructure. It begins by discussing the definition of program objectives,...

Quantifying the Exposure
Methods of categorizing and modeling of exposure will be presented. The use of modeling for the estimation of population exposure will also be examined and some errors inherent with such...

Operations, Maintenance & Cost Comparisons of Three Dewatering Devices
The Metropolitan Waste Control Commission's Wastewater Treatment Plant in Minneapolis/St. Paul has demonstrated that two new innovative sludge dewatering pocesses, namely,...

Belt Filter Operation and Maintenance Survey (ASCE-WPMC Subcommittee Report)
This report summarizes the results of a national survey of municipal wastewater plant belt press installations conducted by an ASCE Task Committee in 1984. Data from 106 installations...

Optimization of Variable Volume Diaphragm Filter Presses
The St. Paul, MN, Metropolitan Waste Control Commission Wastewater Treatment Plant has installed and operated eight variable volume diaphragm filter presses for four years. During this...

Underground Oil Lens Management at John F. Kennedy International Airport
Observation wells plumbed using a water surface detector and standard topographic interpolation techniques were used to establish the hydraulic gradient of the groundwater and the presence...

Design and Construction of TCE/PCE Removal Facilities
This paper presents a review of the design and construction of a facility in Arcadia, California, to remove trichloroethylene (TCE) and tetrachlorethylene (PCE) from ground water. (Edited...

Estimating Wastewater Capacity of a Cedar Swamp
The response of water table to rainfall provided the basis for estimating the wastewater capacity of a northern Michigan cedar swamp which had been used for disposal of 30 million gallons...

Preliminary Evaluation of Submerged Aquatic Macrophytes in a Pilot-Scale Aquatic Treatment System
A study was done to determine which species of submerged aquatic macrophytes (Elodea nuttallii, Myriophyllum heterophyllum, Ceratophyllum demersum) were suitable candidates for use in...

A Bench-Scale Study of Wastewater Aquaculture Using the Duckweed
A continuous flow bench scale reactor was used to evaluate nutrient removal and growth characteristics of the duckweed, Lemna minor. Such a system can further an understanding of the treatment...

An Innovative Wastewater Management Program
An innovative wastewater management program is described which has been implemented in Orange County, Florida. The wastewater treatment facility utilizes the Bardenpho advanced biological...

Theoretical and Experimental Evaluation of Single-Activated Sludge
The objective of this paper is to discuss the results of operating a laboratory bench scale compartmentalized activated sludge unit operated at a hydraulic detention time ( theta ) of...

 

 

 

 

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