DESCRIPTION

This section presents the concepts of wastewater disinfection as it applies to onsite and decentralized systems. Although the processes are the same for small wastewater flows as they are for large wastewater flows, some of the applications are different. In particular, tablet chlorination and liquid chlorination are typical solutions for disinfecting small flows, whereas gas chlorination using one-ton cylinders of chlorine gas is the typical method chosen for gas chlorination in large wastewater treatment plants. Also, when disinfecting wastewater prior to using a soil dispersal system for final treatment and dispersal, considerations must include the effect of the residual disinfectant upon the beneficial soil organisms. The material in this section includes discussions of disinfection agents including, chlorine, ultraviolet light, and ozone.

The goal of this course module is to teach students the concepts and chemistry of wastewater disinfection and allow them to become some of the methods available for wastewater disinfection. The students will be able to select the appropriate disinfection system for a decentralized wastewater treatment system and compute necessary dosage rates for chemical disinfection.

MATERIALS

A. Instructors Guide

Module Perspective (Adobe Acrobat, 57 Kb) (Mar, 2004) Suggested Course Materials (Adobe Acrobat, 205 Kb) (Mar, 2005)

B. Text

Disinfection Text (Adobe Acrobat, 1.2 MB) (Mar, 2005)

C. Powerpoint Files

Disinfection Powerpoint (Adobe Acrobat 2.2 MB) (Mar, 2005)

COMMENTS

If you have comments regarding these materials, please send them to Nancy Deal.

Writing Team:

Review Team:

Mark Gross Kitt Farrell-Poe

John Higgins Paul Trotta Jennifer Brogdon Tibor Banathy