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Articles 331 - 343 of 343

Full-Text Articles in Engineering

Thermal Gasification Of Densified Sewage Sludge And Solid Waste, Samuel A. Vigil, George Tchobanoglous Oct 1980

Thermal Gasification Of Densified Sewage Sludge And Solid Waste, Samuel A. Vigil, George Tchobanoglous

Civil and Environmental Engineering

The disposal of sewage sludge in an economic and environmentally acceptable manner is a problem common to all communities that have municipal wastewater treatment facilities. Similarly, all communities are faced with the disposal of increasing quantities of solid waste. The co-disposal of sludge and solid waste in a common facility is a potential solution to both of these problems. The results of an experimental program to verify the feasibility of the gasification process for the co-disposal of densified sludge and source separated solid waste are presented in this paper.


An Integrated System Employing Alternate Technologies For Liquid And Solid Waste Managment For Intermediate And Small Communities, George Tchobanoglous, John E. Colt, Robert G. Smith, Samuel A. Vigil Jul 1979

An Integrated System Employing Alternate Technologies For Liquid And Solid Waste Managment For Intermediate And Small Communities, George Tchobanoglous, John E. Colt, Robert G. Smith, Samuel A. Vigil

Civil and Environmental Engineering

Over the past 20 years , a variety of alternative, and in many cases innovative, technologies have been proposed for use in waste management systems. If alternative technologies are to be adopted they must, 1) be technologically feasible, 2) minimize the use of energy and resources, 3) maximize the recovery of the energy and nutrients contained in wastewater, 4) be cost-effective, and 5) not be unnecessarily disruptive of the existing order in their implementation. Although a number of the proposed technologies have met some or all of these requirements , few of them have been widely adopted. The principal reason …


Application Of Packed Bed Gasifiers To The Reduction Of Solid Wastes And The Recovery Of Energy, Samuel A. Vigil, George Tchobanoglous, Edward D. Schroeder Jul 1979

Application Of Packed Bed Gasifiers To The Reduction Of Solid Wastes And The Recovery Of Energy, Samuel A. Vigil, George Tchobanoglous, Edward D. Schroeder

Civil and Environmental Engineering

No abstract provided.


Careers In Air Pollution Control, Harold M. Cota Jun 1979

Careers In Air Pollution Control, Harold M. Cota

Civil and Environmental Engineering

No abstract provided.


University Programs In Air Pollution Control: Review And Outlook, August T. Rossano, Harold M. Cota Nov 1978

University Programs In Air Pollution Control: Review And Outlook, August T. Rossano, Harold M. Cota

Civil and Environmental Engineering

From the inception of the National Air Pollution Control program, the U. S. Congress has been mindful of the need and importance of adequate manpower. The challenging technical problems which lie ahead in enforcement, monitoring, testing and research can be effectively dealt with only by individuals with specialized knowledge, skills and experience. In this paper the authors look at undergraduate and graduate training that is being carried out, employment opportunities and the way these may change in the future. A recently completed survey of college level air pollution training in the United States and Canada is included in the report.


A Review Of Manpower Training And Future Directions In Air Pollution Control At Universities, August T. Rossano, Harold M. Cota Jun 1978

A Review Of Manpower Training And Future Directions In Air Pollution Control At Universities, August T. Rossano, Harold M. Cota

Civil and Environmental Engineering

No abstract provided.


Environmental Manpower And Training, Harold M. Cota Oct 1977

Environmental Manpower And Training, Harold M. Cota

Civil and Environmental Engineering

No abstract provided.


Air Pollution Control Training In Colleges And Universities: A Status Report For The United States And Canada, Harold M. Cota Oct 1976

Air Pollution Control Training In Colleges And Universities: A Status Report For The United States And Canada, Harold M. Cota

Civil and Environmental Engineering

The APCA Education and Training Committee surveyed air pollution training at colleges and universities in the United States and Canada in 1975. There were 197 full-time faculty teaching air pollution courses at 75 schools. Graduates from these programs are finding meaningful work in both the public and private sector. Financial support is briefly discussed.


Problems Of Measurement In The Environmental Field, Harold M. Cota Jul 1973

Problems Of Measurement In The Environmental Field, Harold M. Cota

Civil and Environmental Engineering

No abstract provided.


Air Pollution Control Training In Colleges And Universities In The United States, Harold M. Cota Sep 1971

Air Pollution Control Training In Colleges And Universities In The United States, Harold M. Cota

Civil and Environmental Engineering

A nationwide survey of air pollution control training efforts in the United States at colleges and universities was carried out for the S-ll Education and Training Committee, Air Pollution Control Association. Information from 91 schools having four year or graduate programs and five community colleges was received. Questions include type of course work, backgrounds of participating faculty and students, and eventual placement. At the present time about 70% of those in training are graduate students. It was found that most students taking initial employment in air pollution control activities had the M.S. degree. Recommendations for updating this information are made.


Decomposition Of Diulte Hydrogen Peroxide In Alkaline Solutions, Harold M. Cota, T. Katan, M. Chin, F. J. Schoenweis Sep 1964

Decomposition Of Diulte Hydrogen Peroxide In Alkaline Solutions, Harold M. Cota, T. Katan, M. Chin, F. J. Schoenweis

Civil and Environmental Engineering

No abstract provided.


Worldwide Training In Air Pollution Control, Harold M. Cota Jul 1964

Worldwide Training In Air Pollution Control, Harold M. Cota

Civil and Environmental Engineering

A survey of academic training in air pollution control was recently conducted for the APCA Education Council. Questionnaires were sent to faculty at over 200 universities in the United States and 150 universities around the world. This paper lists the schools which completed the questionnaire and includes the number of both undergraduate and graduate courses available, the academic department, and the range of research projects presently underway. The findings indicate that air pollution is a subject being taught worldwide. Most schools predict that their current level of instruction will not change in the next five years. Additions and corrections are …


Design Parameters For Fuel Batteries Operating In A Zero G Field, A. P. Hardt, Harold M. Cota, J. L. Fick, T. Katan Nov 1963

Design Parameters For Fuel Batteries Operating In A Zero G Field, A. P. Hardt, Harold M. Cota, J. L. Fick, T. Katan

Civil and Environmental Engineering

Some design parameters of a hydrazine-oxygen fuel battery operating in a zero G field are described in a digital computer programming treatment. The power balance for a battery employing a gas-producing electrode and an electrolyte pump is treated; optimum power densities and flow rates are established.