EV4002 Natural Systems for Wastewater Treatment Syllabus:
EV4002 Natural Systems for Wastewater Treatment Syllabus – Anna University PG Syllabus Regulation 2021
OBJECTIVE
To gain knowledge and understanding of wetlands -types of wetland, constructed wetland – application, design, method of treatment of both domestic and industrial wastewaters and case studies.
To gain knowledge on design, construction and operation of waste stabilization pond and sludge disposal.
UNIT I INTRODUCTION TO WETLAND TREATMENT SYSTEM
Definition and concept of wetland – types of wetland. Wetland – ecology, flora and fauna, ecological aspects, human health and wetland, onsite applications. introduction to constructed wetland-types free water surface, subsurface wetland-horizontal and vertical flow- wastewaters and their application in wetland – constructed wetland plants-media – in constructed wetland.
UNIT II CONSTRUCTED WETLAND AND REMOVAL MECHANISMS
Site identification- construction and design of constructed wetland, startup, operation and maintenance of wetland system-wetland hydrology- hydraulics. Treatment of domestic wastewater and its performance, mechanisms of pollutant removal- suspended solids, organic matter, nitrogen, phosphorus, pathogen and other contaminants. Reuse of treated wastewater and its applications limitation of constructed wetland system.
UNIT III CASE STUDIES ON CONSTRUCTED WETLAND SYSTEM
Constructed wetland- treatment of domestic wastewater- greywater – landfill leachate – treatment of industrial wastewaters- textile wastewater – dairy wastewater and its performance. Removal of specific pollutants such as heavy metals, aromatics and emerging contaminants etc. Use of amendments in wetland construction, and its performance. Capital and maintenance costs.
UNIT IV DESIGN OF WASTEWATER POND SYSTEMS
Introduction- facultative -partial -mix aerated- ponds -complete -mix aerated pond systems – anaerobic ponds -nitrogen removal in lagoons. Modified high -performance aerated pond systems for nitrification and denitrification – nitrogen removal in ponds coupled with wetlands and gravel bed nitrification filters -Control of algae and design of settling basins. Hydraulic control of ponds -removal of phosphorous -removal of pharmaceuticals and personal care products and antibiotic resistant genes.
UNIT V SLUDGE MANAGEMENT AND TREATMENT
Sludge quantity and characteristics – stabilization and dewatering -sludge freezing -reed beds – vermi stabilization -comparison of bed type operations -composting land application and surface disposal of bio solids onsite waste water systems -effluent disposal and reuse. Sludge quantity and characteristics-stabilization and dewatering-sludge freezing reed beds-vermi stabilization Comparison of bed-type operations-composting land application and surface disposal of biosolidson-site wastewater systems- effluent disposal and reuse.
OUTCOMES:
On completion of the course, the student is expected to be able to
CO1 Explain the various aspects of wetland system, its function and its application in the treatment of wastewaters
CO2 Apply the knowledge of science and engineering fundamentals to know the types of wetlands, construction and operation of wetlands, wetland hydraulics and design of wetland and its performance Understand the process of treatment of domestic waste in the removal of solids, organic matter, phosphate, nitrogen, pathogens and its reuse
CO3 Understand the process of treatment of industrial wastewater in the removal of solids, organic matter, phosphate, nitrogen, heavy metals, phenolics and feasibility for reuse
CO4 Understand the various pond system available for wastewater treatment. design of pond system -removal mechanism
CO5 Manage and dispose the sludge naturally and economically.
REFERENCES:
1. EPA- Design Manual on constructed wetland and aquatic plant system for municipal wastewater treatment system
2. Treatment wetlands by Robert .H.Kadlec, Scott Wallace , CRC press published July 22, 2008
3. Natural Wastewater Treatment Systems, Ronald W. Crites, E. Joe Middlebrooks, Robert K. Bastia, 2nd Edition, CRC PressPublished March 14, 2014
4. Waste water treatment in constructed wetlands with horizontal sub- surface flow by Jan Vyamazal and Lenka Kropfelova, Springer 2010.
5. Constructed wetlands for industrial wastewater treatment system by Alexandros I.Stefanakis (editor), Wiley black well.2018