Treatment and Reuse of Treated Waste water training course

Introduction

With growing concerns over freshwater availability, concept of treating and recycling waste water is progressively getting more pertinent. However, waste water to be recycled need to be treated first for ensuring its quality sufficiently fit for designated uses, such as irrigation, industrial processes, toilet flushing, ground water recharge etc. Waste water treatment can be specifically tailored to meet the water quality requirements of a planned reuse, as some would need only moderate treatment while few others may require higher degree purification. This course aims to discuss the various treatment technologies and their application for producing reuse quality water from waste water. The course will largely cover topics including the basic philosophy of waste water treatment, principles of various waste water treatment units, conventional treatment systems, advanced treatment processes, recycling and reuse opportunities and waste water reuse criteria. The purpose of this course is to instil in participants the comprehensive knowledge and understanding on technologies for water reclamation and reuse.

Day 1  :   Introduction:

General outline; Introduction to waste water; Various sources and types of

Waste water; Need of waste water management; Concept of waste water

treatment and recycling

    Waste water Generation and Characteristics:

Waste water generation and quantity estimation; Water quality parameters

and standards (COD, BOD, DO, Solids, Nutrients, metals and emerging

contaminants); Sources specific wastewater physical and chemical

characteristics

Day 2: Natural Attenuation of Pollutants in Wastewater

Concept of natural attenuation; Wastewater discharge in rivers;

Attenuation of pollutants on land application.

   Treatment Philosophy:

Objectives of wastewater treatment; Concept of mass balance; kinetics

and equilibrium processes; Reactors tanks; Continuously mixed tank

reactors; Plug-flow reactors Introduction to primary, secondary and

tertiary treatment;

  Preliminary and Primary Treatment Processes:

Screening; Grit removal; Equalization tank; Sedimentation theory;

Rectangular and circular sedimentation tanks

Day 3  : Secondary Treatment Processes:

Biological treatment of wastewater; Microbial ecology and growth kinetics; Types of microorganisms; Aerobic and anaerobic processes;

Suspended and attached growth systems; Activated sludge process;

Tricking filters and Rotating biological contactors  

   Secondary Treatment Processes - Anaerobic:

Anaerobic treatment; Anaerobic decomposition of organic matter;

Fluidized bed systems; Upflow anaerobic sludge blanket systems; Biogas

production and collection; other reactor configurations

Day 4  :   Sludge Management:

The quantity and characteristics of sewage sludge; Sludge dewatering,

drying, and thickening; Sludge digestion; Aerobic and anaerobic sludge

stabilization; Composting

 Tertiary (Advanced) Treatment Processes:

Need and Objectives of advanced treatment; Nutrient (N and P) removal;

Chemical treatment processes; Advanced oxidation processes; Adsorption

and Ion-exchange; Membrane processes

Day 5  :   Current Treatment Approaches:

Conventional systems; Integrated treatment systems; Advanced reactor

configurations; SBR, MBR and MBBR; Application and case studies

 Wastewater Recycling:

Scope and demands; Types and stages of recycling; Recycling

requirements; Designated reuse criteria; centralized vs decentralized

recycling systems.

 Technology Selection and Decision Making:

Research trends in wastewater treatment and recycling; Choice modelling

and decision making; Risks and challenges; Socio-economic perspectives;

Case studies