My presentation is about the natural treatment system, for what and all the water is used to the public environment. Also the treating the water with High-technology instrument.

1. BY
J.JENSON SAMRAJ
III M.SC (INT) EVS

2.  Natural-common-soil , water,
wetland environment
 Vegetation-directly involved –
formation of mo’s-utilization of
released plant nutrients for
biomass production
 Special attention to pre
treatment –removal of
suspended solids
 Prevent washing away insoluble
substances and formed
sludges-biological water
treatment-means of proper
design & operation &
maintainence

3. Sufficient dimensions of
devices ( rack ,screen ,
sand traps , grease traps
, biological septic tanks
& sedimentation tank)
Sufficient retention time
Simplicity of operation
Appropriate sludge &
waste management
Good access for good
maintainence
Covering sedimentation
space to get rid of algal
formation

4. a) Soil filter
*vertical flow without vegetation Treatment of storm water & sewage
*horizontal flow without vegetation Of smaller & middle producers
b) Constructed treatment wetland
*horizontal surface , combo of surface
&horizontal subsurface flow
Waste water & contaminated surface
water treatment in favorable climatic
condition
*horizontal subsurface flow
*vertical flow downwards
Sewage treatment ; year around
operation
*vertical flow up Waste water treatment predominantly
in summer
*Vertical flow with intermitted flow Sewage treatment

5. c) Waste stabilization ponds
*aerobic low loaded Surface run off & waste water
treatment
*aerobic high loaded Waste water treatment in climate
favourable areas
*aerobic continuously with aeration Intensive wastewater treatment
continuous aeration
*final purification Final treatment of wastewater after
biological treatment steps
*anaerobic Anaerobic treatment preranked
aerobic treatment
*anaerobic atorage Wastewater treatment of campaign
producers

6. d) Aquatic plant system & bio
eliminators
*ponds and aquatic plant system Wastewater treatment by means of
duckweed , algae ,etc;
*combination of aquaculture with
aquatic plant systems
Municipal & industrial waste waer
treatment
*bio eliminators Wastewater treatment tanks with
submerged meshes for algal biomass
attaching

7. e) Irrigation by wastewater
*irrigation by municipal wastewater Growing season irrigation or annual
irrigation
*irrigation by industrial wastewater Growing season operation or non
growing season irrigation
*Irrigation by agricultural wastewater Vegetation irrigation by process
wastewater
*Irrigation by liquid sludge & slurry Utilization of fertilizing effects of liquid
waste
*Evatranspiration systems with zero
discharge
Vegetation irrigation in on controlled bed
by municipal wastewater

8.  Artificial wetland – treat municipal or
industrial wastewater , grey water or
storm water run off
 Also designed for land reclamation
after mining or as a mitigation step
for natural areas lost to land
development
 Depending on wastewater design
may vary
 Used to treat both centralized & on
site wastewater
 1° treatment is recommended when
there is a large amount of suspended
solids or soluble organic matter
 Acts as biofilter
 Sanitation technology – not
specifically for pathogen removal but
for suspended solids , organic matter
& nutrients
 Subsurface removes pathogens than
surface wetlands

9. Two main types – subsurface flow and surface flow
constructed wetland
The planted vegetation – main role in contamination
removal
The filter bed , consisting usually of sand and gravel
Some constructed wetlands may also serve as a habitat for
native and migratory wildlife – although it is not the main
purpose
Subsurface flow constructed wetlands – either horizontal
or vertical flowof water through gravel and sand bed
Vertical flow – requires small area than horizontal