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CONTENTS

Chlorination in the United Kingdom

306

Chlorination in Germany 310 Treatment Strategies 310

Disinfection of Coagulated Surface Water 310 Disinfection of a Softened Surface Water 311 Treatment and Disinfection of a Groundwater that Contains

Iron and Manganese 311

Acknowledgments 311 References 312

Chlorination of Wastewater Introduction 326

History 326 Chlorine Chemistry in Wastewater

327

Odor Control 329

Prechlorination of Wastewater Scrubbing of Foul Air 333

330

Chlorine and Biological Treatment

338

Trickling Filters 338 BOD Reduction 339 Control of Sludge Bulking 340

Other Uses of Chlorine in Wastewater Treatment

345

Septicity Control 345 Removal of Oils and Grease 348 Removal of Ammonia 349

Industrial Waste Treatment Applications Using Chlorine

352

Free and Combined Cyanides 352 Phenols 359 Textile Wastes 360 Applications to Other Industrial Waste

361

References 361

Disinfection of Wastewater Introduction 363

History 363 The Coliform Standard

364

Viruses 368 Virus Inactivation 370 Methods of Wastewater Disinfection

376

xiii

326

363

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