Chapter 17 - Oxidation - disinfection

Introduction
1.Air oxidation
1.1.Trickling
1.1.1.Cascade
1.1.2.Trickling over trays
1.1.3.Trickling over contact media
1.2.Spraying
1.3.Injecting air into a liquid
1.3.1.Gas diffusion
1.3.2.Contact media aerators
2.Oxidation and disinfection using chlorine
2.1.Sources of chlorine
2.2.Domains of utilisation
2.3.Applications
2.3.1.Use in drinking water disinfection
2.3.2.Other applications
2.4.Bound chlorine: Chloramines
3.Oxidation and disinfection using chlorin dioxide
3.1.Preparation
3.2.Domain of application
3.3.Utilisation
4.Oxidation and disinfection using ozone
4.1.Ozone generation
4.1.1.Principle
4.1.2.The Ozonia ozone generator range
4.2.Ozone transfer
4.2.1.Modelling the ozone transfer
4.2.2.Ozone saturation concentration
4.3.Selecting ozonation reactors
4.3.1.Kinetic aspect - hydraulic of the reactor
4.3.2.Criteria to select ozonation reactors
4.3.3.Ozonation reactors
4.4.Applications
4.4.1.In drinking water treatment
4.4.2.Municipal wastewater
4.4.3.Odor control and gas scrubbing
4.4.4.Swimming pools
4.4.5.Industrial wastewater
4.4.6.Industrial applications
4.5.Catalytic ozonation: Toccata
5.Other oxidation and disinfection processes
5.1.Potassium permanganate
5.2.Bromium
5.3.Hydrogen peroxide
5.4.Peracetic acid
6.Ultraviolet disinfection
6.1.Basic principles - Terminology
6.1.1.Terminology
6.1.2.UV action on DNA and RNA
6.1.3.Doses required
6.2.The different types of UV sources
6.3.The Bioassay (biological test)
6.4.Sizing principles
6.4.1.Average calculation of the UV dose
6.4.2.Discrete calculation of the UV dose
6.4.3.Using the Bioassay
6.5.The various types of reactors
6.5.1.«Small» closed vessel reactors
6.5.2.«Medium and large» size closed vessel reactors - in-line type
6.5.3.Open reactors
6.6.Reactors used in drinking water applications
6.7.Reactors used in wastewater applications
6.7.1.Installation conditions
6.7.2.Reactor types
6.8.Reactors and industrial water applications
6.9.Regulation and controls
6.9.1.Controls devices
6.9.2.Dose regulation devices
6.10.Safety and environment
7.Criteria used when selecting oxidants and disinfectants

Introduction

This chapter describes the various oxidation and disinfection technologies (using chemical and UV irradiation techniques) used by Degrémont. For this purpose, Degrémont uses the bases detailed in chapter 3 § 12.