UNIT-I PGDEM-04 WASTEWATER ENGINEERING– OBJECTIVES OF WASTEWATER
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UNIT-I PGDEM-04 WASTEWATER ENGINEERING– OBJECTIVES OF WASTEWATER TREATMENT, PRIMARY TREATMENT OF WASTEWATER Dr. Asha Gupta STRUCTURE 1.0 Objectives 1.1 Introduction 1.2 Terminology in Wastewater Treatment 1.3 Objectives of Wastewater Treatment 1.4 Primary treatment 1.4.1 Screening 1.4.1.1 Types of Screens 1.4.1.2 Characteristics of Screenings 1.4.2 Comminutors or Shredders 1.4.3 Grit removal 1.4.3.1 Channel type 1.4.3.2 Aerated rectangular basin 1.4.4 Sedimentation 1.4.4.1 Principle of Sedimentation 1.4.4.2 Theory of sedimentation 1.4.4.3 Types of sedimentation tanks 1.4.5 Chemical Coagulation 1.4.5.1 Principle of Coagulation 1.4.5.2 Properties of common coagulants 1.4.5.3 Chemicals used for coagulation 1.4.5.4 Determination of coagulant dose 1.4.5.5 Advantages and Disadvantages of coagulation 1
UNIT-I PGDEM-04 WASTEWATER ENGINEERING– OBJECTIVES OF WASTEWATER
Microsoft Word - pgdem-041.4 PRIMARY TREATMENT
1.4.5 Chemical Coagulation
1.4.5.5 Advantages and Disadvantages of coagulation
1.6 SUMMARY
1.7 KEYWORDS
2.2.3.2 Types of trickling filters
2.2.3.3 Merits and demerits of trickling filters
2.2.3.4 Goals of trickling filters
2.3 ACTIVATED SLUDGE PROCESS
2.3.2 Methods of aeration
B) SPIRAL FLOW TANKS
2.3.2.3 Combined diffused and mechanical aeration
2.3.3 Bulking and foaming sludge in an activated sludge treatment
plant Foam
2.3.4 Advantages of an activated sludge process
2.3.5 Disadvantages of activated sludge process
2.4 ROTATING BIOLOGICAL CONTRACTORS (RBCs)
2.5 SUMMARY
2.6 KEYWORDS
