Aquaponics
Page 2

ecoGROW Aquaponics features its ecoTECH water make-up, pumping and oxygenation systems, air make-up, the analysis of primary water and the attention to sourcing criteria. Where ecoPHASER Green Thermal Energy Systems (near zero NOx) are deployed, carbon dioxide extracted in high purity from the flue gases is used in the air makeup. Carbon dioxide (CO2) is an essential component of photosynthesis (also called carbon assimilation).  Plant leaves ingest the CO2 and release the oxygen from the molecule whilst retaining the carbon in a process called transpiration. In other words, carbon dioxide is an essential nutrient, just as important in the growth cycle as the root fed nourishment mix that the plant consumes.

CO2 increases productivity through improved plant growth and vigour. Some ways in which productivity is increased by CO2 include earlier flowering and higher fruit yields. Carbon dioxide enters into the plant through the stomatal openings by the process of diffusion. Stomata are specialized cells located mainly on the underside of the leaves in the epidermal layer. The cells open and close allowing gas exchange to occur. The concentration of CO2 outside the leaf strongly influences the rate of CO2 uptake by the plant. The higher the CO2 concentration outside the leaf, the greater the uptake of CO2 by the plant. Light levels, leaf and ambient air temperatures, relative humidity, water stress and the CO2 and oxygen (O2) concentration in the air and the leaf, are many of the key factors that determine the opening and closing of the stomata.

The ecoGROW System species-specific (LED) lighting is designed to maximize stomata stimulus, controlled with the same degree of precision as the other processes for optimum results. For the majority of greenhouse crops, net photosynthesis increases as CO2 levels increase from 340–1,000 ppm (parts per million). Most crops show that for any given level of photosynthetically active radiation (PAR), increasing the CO2 level to 1,000 ppm (0.01%) will increase the photosynthesis by about 50% over ambient CO2 levels. This is approximately 3 times the carbon dioxide content of ambient air and is essential to make-up and supplement the drop of CO2from consumption by an actively growing crop that will cause a dramatic slow down in growth if levels drop below ambient norms.


FLOATING RAFT technology
General Schematic diagram

Deep Water Floating Raft Aquaponic Horticulture (DWC)

ecoGROW  aquaponics systems have deep water full length pools with floating polystyrene (thermocole) rafts that are perforated to allow the plant roots into the flowing nutrient medium. Oxygen bubbles through the roots from tank base mounted aerators.

Trays in Pool  
   

Instead of discharging water, aquaponics recycles the water in a recirculating system. Water is pumped from the fish tank effluent filtration and oxygen diffuser system through grow beds which circulate the nutrient loaded water through the rhizospheres of the plants along with bubbled oxygen, some of which is recovered from the greenhouse atmosphere inside each section in the mid atmospheric strata level. Transpired oxygen (O2) is 36% of the density of carbon dioxide (CO2), but heavier than our 78% nitrogen air. As nitrogen is 87.5% the density of oxygen, air rises to the higher level of the greenhouse atmosphere, where it is drawn off for exhaust whilst the O2 is recirculated via a hospital type membrane separator for oxygenating fish tanks and root matrices.

The ecoGROW Food Circle
Diagram Follows on page 3
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