constructed wetlands

1. CONSTRUCTED WETLANDS
Presented by Abijith Rajesh
Roll No : 3
guided by Arunima R T
MVGM GPC vennikulam
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2. CONTENTS
Abstract
Introduction
Natural wetlands
constructed wetlands
Examples
Advantages
Disadvantages
conclusion
References
Thank You
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3. Constructed wetlands are treatment systems that use natural
processes involving wetland vegetation, soils, and their associated
microbial assemblages to improve water quality
ABSTRACT
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4. Wetlands are lands transitional between terrestrial and aquatic systems where the water table is
usually at or near the surface, or the land is covered by shallow water.
1) at least periodically, the land supports predominantly hydrophytes;
2) the substrate is predominantly undrained hydric soil;
3) the substrate is saturated with water or covered by shallow water at some time during the
growing season of each year.
INTRODUCTION
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5. A wetland is an area of land that is
either covered by water or
saturated with water. The water is
often groundwater, seeping up from
an aquifer or spring. A wetland’s
water can also come from a nearby
river or lake. Seawater can also
create wetlands, especially in
coastal areas that experience
strong tides.
NATURAL WETLAND
WHAT IS A
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6. MARSH SWAMP
TYPES OF NATURAL WETLANDS
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7. BOG
FEN
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8. A constructed wetland is an organic
wastewater treatment system that
mimics and improves the effectiveness
of the processes that help to purify
water similar to naturally occurring
wetlands.
CONSRUCTED WETLANDS
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ADVANTAGES
less expensive treatment option
process stability
utilize natural process
low energy demand
low environmental impact
simple operation/maintanance
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DIADVANTAGES
large area requirement
only affordable where land is cheap
need diffrent criteria for diffrent
climate
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13. Constructed wetlands provide a low-cost, low-maintenance
alternative to traditional wastewater treatment and have been
widely used in both centralized and decentralized systems
the CW is an effective and sustainable technology for wastewater
treatment with the initial influent level, microbial biofilm, detention
time, plant species and configuration among the most dominating
parameters that are directly controlling the removal rates
CONCLUSION
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14. ScienceDirect
international journal of environmental sciences
constructed weland manual UN HABITAT
REFERENCES
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15. THANK YOU!
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