The hydroponics wastewater treatment system is a system that biologically and chemically treats the wastewater containing nitrogen and phosphorus generated from hydroponic cultivation to meet the standards for wastewater discharge.
Nitrate nitrogen is removed through biological treatment using sulfur-oxidizing microorganisms attached on sulfur particles and iron compounds.
Phosphorus is solidified and treated through the iron component of iron compounds (Fe(OH)₃).
If the nitrogen content in the influent is high, small amount of organic carbon sources can be utilized.
The iron component (Fe(OH)₃) removes H₂S, which can be produced during autotrophic sulfur denitrification, preventing the occurrence of odor.
The adsorbed H₂S can be recycled as an energy source during nitrate removal, saving the consumption of sulfur particles.
Examples
Effects of HRT and the ratio of sulfur particles and desulfurized solid wastes on nitrate removal.
Nitrogen removal depend on EBCT and changes of the sulfate, phosphate