Wastewater Characterization and Regulations

2.1 Volumetric Wastewater Production and Daily Changes 25

2.2 Pollutants 27

2.2.1 Survey 27

2.2.2 Dissolved Substances 28

2.2.2.1 Organic Substances 28

2.2.2.2 Inorganic Substances 30

2.2.3 Colloids 32

2.2.3.1 Oil-In-Water Emulsions 32

2.2.3.2 Solid-In-Water Colloids 33

2.2.4 Suspended Solids 34

2.3 Methods for Measuring Dissolved Organic Substances as Total Parameters 34

2.3.1 Biochemical Oxygen Demand 34

2.3.2 Chemical Oxygen Demand 36

2.3.3 Total and Dissolved Organic Carbon 37 2.4 Legislation 38

2.4.1 Preface 38

2.4.2 German Legislation 38

2.4.2.1 Legislation Concerning Discharge into Public Sewers 38

2.4.2.2 Legislation Concerning Discharge into Waters 39

2.4.3 EU Guidelines 41 References 42

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