Background Information Introductory Remarks Read & Answer Text & New Word Reading Intensive Study Exercise Check-up Assignment

Pre-reading Activities: Listen, Look & Say Watch & Discuss Watch the video and discuss the given topics. Questions & Answers Listen to a passage and answer some questions. Listen to a passage and fill in the missing words. Spot Dictation Acquaint yourself with some relevant information. Background Information

Mirror of America Mirror here means a person who gives a true representation or description of the country . Mark Twain was one of literary giants in human history whose works often reveal more truth than many political essays and therefore his life and works are a mirror of America

I . Teaching Content II . Teaching Objectives III . Teaching Requirements IV . Teaching Approaches V . Teaching Focal Points

Teaching Content The first section of Lesson Five Speech on Hitler's Invasion of the U.S.S.R. Teaching Objectives A. Enable students to become acquainted with the historical background of World War and Winston Churchill's life career

Part I Wastewater Engineering 1 Wastewater Engineering: An Overview 2 Constituents in Wastewater 3 Analysis and Selection of Wastewater Flowrates and Constituent Loadings 4 Introduction to Process Analysis and Selection 5 Physical Unit Operation

Attached growth processes can be grouped into three general classes: (1) nonsubmerged attached growth processes, (2) suspended growth processes with fixed-film packing, and (3) submerged attached growth aerobic processes. Nonsubmerged Attached Growth Processes. Trickling filters with rock packing have been a common

Treatment The principal chemical unit processes used for wastewater treatment include (1) chemical coagulation, (2) chemical precipitation, (3) chemical disinfection, (4) chemical oxidation, (5) advanced oxidation processes, (6) ion exchange, and (7) chemical neutralization, scale control, and stabilization

The constituents of concern found in wastewater are removed by physical, chemical, and biological methods. The individual methods usually are classified as physical unit operations, chemical unit processes, and biological unit processes. Treatment methods in which the application of physical forces predominate are known as physical unit operations

An understanding of the nature of wastewater is essential in the design and operation of collection, treatment, and reuse facilities, and in the engineering management of environmental quality. To promote this understanding, the information in this chapter is presented in eight sections dealing with (1) an introduction to the constituents found in wastewater