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Phytoremediation (systems flow and vertical surface)

The configuration of these systems is quite similar to those described in the previous post.

The difference is that to treat the wastewater flows vertically in the medium filling (percolation) and is placed in the tanks with alternating load intermittently, while in the SFS-h systems there is a plug flow with continuous feeding.

This methodology involves the use of intermittent flow a minimum of two tanks in parallel for each line alternate work flow, so you can adjust the timing of re-oxygenation of the bed varying frequency and quantity of the hydraulic load input, through the adoption of appropriately sized self-priming siphon devices.

surface flow systems instead, consist of tanks or canals where the water surface is exposed to the atmosphere and the soil, constantly submerged, is the support for the roots of plants emerging in these systems the flow is horizontal and the height of the tanks generally limited to a few tens of centimeters.

In these systems, the mechanisms of killing reproduce exactly all the factors involved in the power of self-purification of wetlands.

In the next post, unless there are specific questions, I begin to talk about the foundations of buildings green.

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Phytoremediation (horizontal-flow systems) Phytoremediation

wetland systems SFS-h or HF (horizontal subsurface flow) are made up of tanks with an inert material with a particle size selected in order to ensure adequate hydraulic conductivity (the means of filling commonly used are sand, gravel , rubble). Inert materials are the medium on which they grow roots emergent plants (Phragmites australis are commonly used).

The bottom of the tanks must be properly sealed using a layer of clay or synthetic membranes.

The flow of water remains constantly below the surface of the absorbent tray and flows horizontally through a gently sloping bottom of the bed (approximately 1%) obtained with a layer of sand beneath the surface waterproofing.

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L a wetland is a natural water purification system consists of a gray waterproof basin filled with gravel and vegetative plant material macrophytes.

The purification is done through the combined action between the substrate gravel, plants, wastewater and microorganisms.

The system works in the absence of added energy and electromechanical parts thus making it possible to define the eco-system.

The system of constructed wetlands is accomplished through the excavation of a basin of variable size depending on the extent and type of discharge. The dock, once sealed, is filled with an inert material which will be directly selected on the different plant species planted macrophytes suitable for the purification.

wetland plants have many features that make them excellent solutions low-cost, high-purifying to:

- low and easy maintenance

- training area perennially green irrigated

- possibility to reuse the purified water