Describes the process of high gradient magnetic separation which gives promise as a method of large scale removal of colloidal impurities including bacteria and viruses. Examples and diagrams are included. (GH)

This document is the student workbook for a course in mathematics for water quality control personnel. This version contains complete problems, answers and references. Problems are arranged alphabetically by treatment process. Charts, graphs, and drawings represent data forms an operator might see in a plant containing information necessary for…

Data, secured by questionnaire from single household dwelling units in Warwick, Rhode Island, were used to ascertain differences among social status groups with respect to attitudes and conceptualization pertaining to water pollution and water supply. A social status index was used to delineate three status groups having high, middle, and low rank…

This book is designed as a text for undergraduate civil engineering courses and as preliminary reading for postgraduate courses in public health engineering and water resources technology. It is also intended to be of value to workers already in the field and to students preparing for the examinations of the Institute of Water Pollution Control…

This study was made in two phases. Phase I was conducted to obtain extensive information about "The Wall Street Journal's" subscribers on their business activities, purchasing influence, involvement in pollution control, personal resources, etc. Those personally active in anti-pollution programs received a second survey dealing with environmental…

This report explains the importance of various analytical balances in the water or wastewater laboratory. Stressed is the proper procedure for utilizing the equipment as well as the mechanics involved in its operation. (CS)

Conventional and nuclear power plants release waste heat to cooling water which then returns to receiving bodies of surface water. This thermal pollution causes a variety of effects in the aquatic ecosystem. More must be learned about these effects to ensure adequate regulation of thermal discharges. (RE)

Cadmium levels in the environment, food, and human tissue are given. The industrial uses and toxicology of the element are discussed. (BB)

An evaluation of the use of the parameters currently being used to design and operate the activated sludge process is presented. The advantages and disadvantages for the use of each parameter are discussed. (MR)

The most frequent testing required under the Safe Drinking Water Act of 1974 is for turbidity and coliform. Free chlorine residual testing can be substituted for part of the coliform requirement. Described are chemical procedures for performing this test. References are given. (Author/MA)

The use of remote sensing to quickly detect and efficiently monitor environmental problems is discussed. Available technology, typical operations procedure, and film choice are detailed. (BT)

Discusses a number of ways in which food processing innovations have actual or potential value in drastically reducing waste, maintaining product quality and improving product yield. (JR)

The findings of the 1972 Environmental Job Opportunities Survey indicate that the widely held view that environmental pollution control activities will generate large numbers of new jobs is overly optimistic. However the limitations of the survey are pointed out, with the suggestion that caution be applied in the interpreting its results. (SA)

Reviewed are accomplishments, problems, and frustrations faced by individual states in meeting requirements of P.L. 92-500, Federal Water Pollution Control Act Amendments of 1972. State Environmental officials complain the new law may be a hindrance to established cleanup programs. Statistics and charts are given. (BL)

Discusses the roles of leading firms, consulting engineers and equipment manufacturers in the growing field of water pollution control. Reviews of individual companies are given. (BL)