This lesson is an introduction to the operation of filter presses. Two basic types of presses, their components, the sequence of operation, operational controls, sampling, and testing are discussed. The instructor's manual contains a description of the lesson, estimated presentation time, instructional materials list, suggested sequence of…

Capillary suction time is time required for the liquid phase of a treated sludge to travel through 1 centimeter of media (blotter or filter paper). Designed for individuals who have completed National Pollutant Discharge Elimination System (NPDES) level 1 laboratory training skills, this module provides waste water treatment plant operators with…

Designed for individuals who have completed National Pollutant Discharge Elimination System (NPDES) level 1 laboratory training skills, this module provides waste water treatment plant operators with the basic information needed to: (1) successfully run a centrifuge test; (2) accurately read results obtained in test tubes; and (3) obtain…

In the operation of vacuum filters and belt filters, it is desirable to evaluate the performance of different types of filter media and conditioning processes. The filter leaf test, which is used to evaluate these items, is described. Designed for individuals who have completed National Pollutant Discharge Elimination System (NPDES) level 1…

The rise time test (along with the settleometer procedure) is used to monitor sludge behavior in the secondary clarifier of an activated sludge system. The test monitors the effect of the nitrification/denitrification process and aids the operator in determining optimum clarifier sludge detention time and, to some extent, optimum degree of…

The settleometer test is used to indicate the solids-liquid separation (downtime) capability of sludge, most commonly on activated sludge entering the secondary clarifier and aerobic digesters. Designed for individuals who have completed National Pollutant Discharge Elimination System (NPDES) level 1 laboratory training skills, this module…

A commonly used test for determining filterability of conditioned sludge is the specific resistance (Buchner funnel) test. The sludge is filtered through filter paper using a Buchner funnel, and the time needed to obtain a given volume of filtrate (or for cake residue to begin to crack) is measured. The shorter the time, the better the…

This textbook is an illustrated table book rather than an elementary arithmetic book. Its object is to suggest things for pupils to do. While it is impossible in a work so small to do more than give suggestions, the teacher will find little difficulty in supplying the deficiency by the use of the blackboard. Although there is nothing in the book…

Word lists and class activities are suggested for improving the spelling of elementary school students. The word lists contain rhyming words, antonyms, synonyms, homonyms, 100 spelling demons, look-alike words that are easily confused, and content area words (for geography, mathematics, science, sports, music, social studies). The suggested…

Examines the debate between two approaches to teaching writing: imitation of classic models versus technical writing for the real world. Argues that, in either approach, a developmental sequence of assignments is paramount. Describes compromise course plan based on careers, in which students write research papers about vocations in which they are…

To help students write more effectively, a technique for writing from thesis statements is described that requires students to create a picture of a wheel. The hub is a word that is the essence of the topic; the spokes are concrete examples; and the tire is the thesis statement. (MLW)

Artists and writers from Maine were asked to develop creative activities for a sixth-grade class. Students were encouraged to observe nature, investigate their ancestors, design logos, and think about the impossible. Several of the activities that could be adopted to relate to other states are presented. (DF)

Arguing that ethics is an important part of technical communication, this book discusses ethics in the broad sense including not only the act of communication but also where technical information came from and how it likely will be used. It is intended for advanced undergraduate and graduate audiences, and assumes some familiarity with technical…

This textbook is an elementary-school English grammar course. Since this book is designed for the pupil rather than for the teacher, all suggestions as to the teaching of English grammar have been conveyed rather by implication than by specific recommendation. The text itself is, however, designed to indicate a general method of presentation,…

It is the purpose of the author of this work to give to the Youth of the country, as well as general readers, a condensed History of the United States of America; embracing all important facts connected with the discovery and early occupation of the country, within their limits, by immigrants from other lands; together with the facts attending the…