Analytical methods are reviewed for: alkali and alkaline earth metals; transition metals; precious metals; group 12, 13, 14, and 15 metals, nonmetals; radionuclides; multiple metals; anions; gases; chromatography; mass spectroscopy; photometry; sampling; volatile compounds; surfactants; detergents; pesticides; herbicides; and fungicides. (MVL)

Describes the cumulative impact of rapid population growth, industrial and military activity, agriculture, and motor vehicles on California's environmental and social fabric. Discusses these problems in California as a forecast for the nation and test to consensus-based U.S. representative government. (Author/ MCO)

This lesson is a basic description of aerobic digestion. Topics presented include a general process overview discussion of a typical digester's components, factors influencing performance, operational controls, and biological considerations for successful operation. The lesson includes an instructor's guide and student workbook. The instructor's…

This lesson is the first of a two-part series on anaerobic digestion. Topics discussed include the five basic functions of an anaerobic digester, basic theory of the biological processes involved, basic equipment necessary for digestion, and the products of digestion. The lesson includes an instructor's guide and student workbook. The instructor's…

The basic operation of the gravity thickener is described in this lesson, focusing on the theory of operation, components found in a typical thickener, and the parameters which must be understood in optimizing the opeation of the thickener. Attention is given to mathematics concepts which are used in controlling hydraulic loading, detention time,…

An introductory description of the use of centrifuges in the process of volume reduction is provided in this lesson. Three basic centrifuges, their theory of operation, quality of cake and centrate, and operational control testing are discussed. The lesson includes an instructor's guide and student workbook. The instructor's guide contains a…

This lesson is an introduction to sludge conditioning. Topics covered include a brief explanation of colloidal systems, theory of chemical and heat conditioning, and conditioning aids. The lesson includes an instructor's guide and student workbook. The instructor's guide contains a description of the lesson, estimated presentation time,…

A description of the general characteristics of sludge is provided in this lesson. It is intended as introductory material to acquaint students with the physical, chemical and biological characteristics of sludge. The lesson includes an instructor's guide and student workbook. The instructor's guide contains a description of the lesson, estimated…

This lesson describes the process of dissolved air flotation thickening. The material is intended to acquaint students with the fundamental principles of operation, components found on a typical thickener, factors that affect operation, a comparison with other thickening processes, and the calculations and laboratory tests required in establishing…

This guide for elementary school students deals with the importance of and the uses of water, especially in the western United States. Topics covered include the importance of water as a resource; the need for conservation; water storage through dams and reservoirs; irrigation; the lack of water in the old West; the uses of water for cities and…

This article is concerned with the agricultural and economic development of the Sahel, an area characterized by uneven climate. Conditions caused by floods and droughts have necessitated the establishment of water management programs to maintain water quality and quantity. Development of this region is designed to follow environmental conservation…

The Second National Conference on Complete WateReuse stressed better planning, management, and use of water. The sessions covered: water reuse and its problems; water's interface with air and land, and modification of these interactions by the imposition of energy; and heavy metals in the environment and methods for their removal. (BT)

Describes the purpose, content, and relevancy of courses dealing with natural and artificial aquatic environments, including surface water and ground water systems as well as water and waste treatment processes. Describes existing programs which are offered at the graduate level in this subject area. (MLH)

This unit on aerobic sludge digestion covers the theory of the process, system components, factors that affect the process performance, standard operational concerns, indicators of steady-state operations, and operational problems. The instructor's guide includes: (1) an overview of the unit; (2) lesson plan; (3) lecture outline (keyed to a set of…

This manual contains the textual material for a single-lesson unit on aerobic sludge digestion. Topic areas addressed include: (1) theory of aerobic digestion; (2) system components; (3) performance factors; (4) indicators of stable operation; and (5) operational problems and their solutions. A list of objectives, glossary of key terms, and…