Circular waste water treatment system - HYDRO1&2
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HYDRO1 is a circular wastewater treatment system applied in decentralised areas with high seasonal loads whose outputs are used to fertigated 1ha of agroforestry (HYDRO2).
It combines anaerobic processes with constructed wetlandsand disinfection to treat domestic wastewater as a completely circular solution where water, nutrients and the produced sludge are reused.
The anaerobic treatment takes placein two UASB (Up-flow Anaerobic Sludge reactors, leading to the production of biogas and a small amount of sludge. The process recovers energy in the form of biogas, has low operating expenses and low footprint. The biogas produced is collected in a gasometer and is being upgraded in order to produce pure biomethane which is used as fuel,while the sludge is treated in a sequence of a sludge drying reed bed,a composting unit and a biofilter.
The anaerobic treated effluent is fed in the constructed wetlands, which serve as a secondary treatment providing further reduction of the organic carbon content and suspended solids of wastewater.
The treated effluent from the wetlands is further fed to a post-treatment unit which consists of membrane filtration coupled to a UV disinfection system.
1ha of an agroforestry system is then fertigated using reclaimed water with a high nutrient content that is the result/output from HYDRO1 system. The agroforestry is divided into 3 main groups:
1) trees for fruit production;
2) orchards, bushes;
3) herbs and annual crops.
HYDRO2 combines the regenerative capacities of agroforestry with the use of reclaimed water and nutrients.
Up to 100 m3 of reclaimed water per day (in summertime) is available for irrigation.
For a quick assessement of the replicability of the solutions proposed, based on the information available to users, please link to https://hydrousa.org/Hydrousa_website/page0.html
For further information please visit hydrousa web page.