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IRON WASTEWATER TREATED BY AN HYBRID CONSTRUCTED WETLAND: FIN

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Alejandra Gaviria

on 11 December 2013

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Transcript of IRON WASTEWATER TREATED BY AN HYBRID CONSTRUCTED WETLAND: FIN

Conclusions
-The Constructed Wetland System Needs Another Plant in the Horizontal Tank. Why? How to Plant the New Specie in the System?

-The constructed wetland system bravery positive results regarding the water treatment containing iron, less cordial words, the system removes iron concentrations of treated water. Portion of the removed iron is absorbed and accumulated by plants (Typha latifolia and Juncus)

- The effluent for the treatment system meets the parameters set by the law for water purposes in crops irrigation. The soil culture serves as storage and supply while lettuce absorbed and utilized.

- The irrigation of crops of lettuce is effective and positive with the water leaving the system phytodepuration while the soil does not contain in its chemical composition amounts of iron who contributing excess thereof, which does hinder the development plant.
IRON WASTEWATER TREATED BY AN HYBRID CONSTRUCTED WETLAND: FINAL USE FOR IRRIGATION OF
Lactuca sativa

by: Alejandra Gaviria

Pilot Phytodepuration Plant Configuration
-Consequences of The Rainfall And The Evapotranspiration
-Timers Configuration
-Experimental Phase Scheduling
The phytoremediated water used as irrigation source for lettuce crops
Objectives of the project
Analyse the iron uptake in
Lactuca sativa
irrigated with water treated by an hybrid constructed wetland
Main Goal
2
Analyse if L. sativa collects and absorbs iron absorbed after the irrigation.
1
Evaluate the behaviour of plants within the treatment system and determine if there is an accumulation of iron in their tissues.
3
Determine if the soil in the lettuce crop absorbed amounts of iron contained in the irrigation water.
Introduction
To performance these thesis was used an hybrid constructed wetland system located to the interior of DIATI at the Politecnico di Torino and was evaluated its performance with an inlet water flow has it a known iron concentration. After putting the water flow at the constructed wetland treatment, comes afloat the question on whether system is effective removing iron of the water and what to do with the water leaving the system. It is for this reason that was considered appropriate to use the outflow to the development of a second argument which addresses the lettuce crop irrigation and its ability to absorb and store amounts of iron.
Fundamental definitions
Iron
Properties
In aquatic animals
In the human body
Inorganic geochesmestri of Iron
In the Water
In food
In plants
Fe (II)
Ferrous Iron
Fe(III)
Ferric Iron
Where is the
iron?
The Phytodepuration
Wetlands and Constructed Wetlands?
Constructed Wetlands
Constructed Wetlands
Types
Wastewater source
According to the flux
Surface Flow
Sub-surface flow
Horizontal
Vertical
Hybrid
Municipal
Mine Drainage
Urban Storm-water
Agricultural Runoff
Landfill Leachate
System Cycle
Juncus
This plant was planted in the SFS-v Tank A at phytodepuration pilot plant during the months of April-May of 2012.
Typha latifolia

This plant was planted in the SFS-v Tank B at phytodepuration pilot plant during the months of May of 2011.

Aster tripolium
This plant was planted in the SFS-h Tank at phytodepuration pilot plant.
System Plants
Water with
known iron
concentration
Crop irrigation
General
experimental
procedures

Hybrid
phytodepuration
system
Results 1
Results 2
Conclusions
Phytodepuration Plant
Iron load into the phytodepuration system
- Begins the first week of April

- Enter an amount of 15 litters of iron solution (in a concentration corresponding to 50mg/l of iron) with 500 litters of water
The methodologies used to the analysis of water samples and determine the concentration of iron is APHA, 3113 B METHOD, 2010 (ELECTROTHERMAL ATOMIC ABSORPTION SPECTROMETRY) (APHA; AWWA; WEF, 1992)
Water samples in the constructed wetland system for the determination of iron abatement
Iron Concentration in
the Phytodepuration System
Into the water
In the plants
Multiparameter Probe
Use of multiparameter probe in obtaining data
Hanna Instruments HI 9828/4 Multiparameter Water Quality Portable Meter
- Temperature
- pH
- Dissolved oxygen
- Conductivity
- Total dissolved solids (TDS)

From 6th June 2013 until September 16 current year, the data collection was carried out three times a week (Monday, Wednesday and Friday) at three different sites of the system (inlet Tank, S1 and S2 tanks) in order to have sufficient and representative data
Results 1
Lettuce Plant (
Lactuca sativa
)
Botanical Name
: Lactuca sativa L.
Family:
Compositae
Water content:
95%
Uses:
Base for salad. It is anodyne, sedative, diuretic and expectorant
Iron in raw L. sativa by each 100gr:
0,3 mg
Origin:
Asia Minor
Climate:
cool growing season (monthly average temp, of 12.8 -15.6 °C). Higher temperatures induce bolting and cause bitter taste in the leaves and accelerate the disorder ‘tipbrun’ and rot. Seed germination is affected at temperature above 27 °C.
Soil:
Rich and well-drained soil. pH: 5,8-6,6
Temperature
Iron Concentration
Results
2
It would be useful to consider that the irrigation of lettuce crops with water exiting the phytodepuration system could be beneficial in fortified food. In this case it is necessary to analyze what is the optimal point of iron fortification of lettuce and where presents the best conditions to allow greatest gain in nutritional benefits and environmental conservation.
GRAZIE
Elements Involved In The Natural Processes Of The Constructed Wetlands
Vegetation
Soil
Microbial Activity
* Analytical determination of the iron concentration in the phytodepuration system:
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