What is a Wetland?
- Wetlands are areas which are naturally wet most of the year.
- Wetlands are biologically productive ecosystems and have high rate of biological activity.
- Wetlands can transform wastewater’s pollutants into harmless by-products
Constructed Wetlands principles
- Wastewater flows below the ground surface, through the plant roots, while different natural purifying processes take place: Biological * Chemical * Physical
- Organic matter is decomposed by microorganisms.
- Nitrogen is released to the atmosphere. Phosphorus is bound to soil particles. This natural process occurs in the rootzone beneath the ground surface.
High quality of treated effluent coming out of the wetland.
Horizontal Sub-Surface Flow
Wetlands can transform pollutants into harmless by-products
View into the Rootzone
Rootzone– area with high bacteria concentration
Bacteria gets its nutrition from the wastewater
contents
- organic matter
- nitrogen
- phosphorus.
Wastewater flowing through - is purified
The wetland plants
- Insert oxygen to the rootzone
- Help the flow of wastewater within the rootzone and the wetland
- Absorb gasses from the wastewaterprevents malodors
- A green spot in the landscape
Phragmites Australis
Waterevive offers assessment, alternatives comparison, design, supervision and relevant construction for the following scope of activities:
• River and lake management and rehabilitation
• Municipal wastewater treatment (optionally, as a
municipal park)
• Livestock effluent treatment
• Industrial wastewater
• Sludge treatment
• Landfill leachate
• Nitrate removal from drinking water
• Bird parks
• Ornamental public lakes
Some case studies
Live stock effluent poses complex challenges with high nutrients and organic content, sludge, seasonal fluctuation, and often, high salinity.
Waterevive treats dairy farms (total sludge treatment or just the milking parlor), piggeries,
Ostridge farms and slaughter houses.
Each and every project requires different solutions.
Municipal and agricultural wastewaters, including goat, cowshed and winery outflow.
Neot Smadar
Dairy Shmueli, Israel Shmueli
Livestock Wastewater
Dairy Wastewater, Zipori
Livestock Wastewater
Sludge treatment refers either to livestock
sludge or to sludge produced by wastewater
treatment plants, especially activated sludge.
It requires alternative ponds- one operating at a time, while others are resting until complete mineralization of the sludge.
Cleaning of the ponds occur once 15 years on average (each one on a different year.
One month after planting
Six month after planting (4 months of regular operation)
Landfill leachate is a concentrate of
everything: heavy metals, hydrocarbons, salts, nutrients (more on new landfills).
It sometimes requires a combination of
technologies (especially electrocoagulation in industrial landfills)
Hiria land fill leachate project, with a visiting cente
Huado land fill leachate- China
Agricultural reservoir of lesser quality of water, clogs irrigation systems, and sometime damages the crops.
On the other hand it offers opportunities for fish
farming and eco-tourism In this case Ofra Aqua transformed a
problematic reservoir into organic fish farm, a touristic attraction and a source of good quality problem - free water for irrigation.
Neot Smadar reservoir and organic fish farm, 27,000 M2
Municipal systems can be independent, for small communities mainly, or in combination with other
technologies in bigger projects, or when land is not available.
It can act as the cities recreational spot.
In Mexico, Waterevive designs systems for small communities.
Playing with topography
All systems achieve much higher standards then required by the local regulation.
The best way to treat a polluted river is to eliminate the source of pollution. However, a non-point pollution can not be easily controlled. One way to go about this is to build bypasses along
the banks that treat the water on the way.
Such a project was constructed on the Yarkon bank.
River pollution changes dramatically from analysis to analysis,
but the system is stable and provides good water.
Another project, recently finished, polishes the WWTP treated water through a 20,000 m2 pond before it enters the river.
The pond will be a municipal park.
A research project had added a lot of knowhow about other substances such as hormones and antibiotics that have an effect on river life.
YARKON river non-point pollution treatment
YARKON RIVER
Clean water flowing back to the river
First year of operation
7th year of operation
9th and 10th years of operation
Hod Hasharon polishing pond before emittance to the Yarkon river
The Shafdan experimental site
Built in 2004 for the Tel Aviv University with Italian funding to research the
ability to remove hormones and antibiotics, and achieve an environmental friendly water for rivers
Nitrate removal
• Agriculture has a very extensive use of nitrogen fertilizers, and large quantities of nitrate remain in the soil after application.
• In addition, wastewater treatment plant effluents with
high nitrate values are used for irrigation and flow into streams.
• Nitrate in the soil and in irrigation water seeps through the ground and into the groundwater.
• Consequently, the groundwater becomes contaminated , and wells containing high levels of nitrate are disqualified for use as a drinking water source.
• In the soil there are denitrifying bacteria which break down nitrate to atmospheric nitrogen (N2)
• These microbes require organic material and anaerobic environment to enable them to perform the decomposition effectively.
• Constructed Wetlands, with an organic substrate, are an optimal environment for efficient denitrification.
• Constructed wetland vegetation enriches the root environment for denitrifying bacteria
• In addition, constructed wetland vegetation consumes nitrate
directly from the water.
• Waterevive operates a 5 year Beta Site with on going monitoring, and expects to get a permit for drinking
water supply this year
First phase Nitrate removal
Beta site’s first year
Nitrate NO3 removel Beta Site In
