Dephosphorization and Denitrification Process
Seshin Clean’s dephosphorization and denitrification is a one-step higher level process that minimizes operating costs by reducing electricity costs and carbon sources as this process generates ANAMOX and SURAMOX reactions along with the existing nitrification and denitrification simultaneously.

Process Chart

Reaction mechanism

Ammonification

• Process in which microorganisms ammonify organic nitrogen while most of the organic matter contained in the nitrogen exists in a reduced amino form.
• CHONS → CO₂ + H₂O + NH₃ + cellular multiplication

Nitrification

• This is the process of nitrifying ammonia or ammonium ion with nitrous bacteria and nitrate bacteria by using carbon dioxide gas, carbonate, and bicarbonate as carbon sources in a state without organic matter.
• • 2NH₄ + 3O₂ + HCO₂^- → 2NO₂ +2H₂O +4H⁼ +Cell
• • NO₂ + O2 + HCO₃^- → 2NO₂ + 2H₂O + 4H⁺ + Cell
• • General: NH₄⁺ +2O₂ → NO₂^- + H₂O + 2H⁺

Denitrification

• Denitrifying bacteria is arbitrary and anaerobic, and respires when O₂ exists or in anoxic conditions using O in or NO₂ or NO₃.
• • 2NO₃^- + 10H⁺ + CH₃OH → N₂ + 4H₂O + 2OH^- + Cell
• • 2NO₂^- + 6H⁺ + CH₃OH → N₂ + 2H₂O + 2OH^- + Cell

Combined Denitrification

Combined Denitrification

ANAMOX	SURAMOX
• NH4+ + 3/2NO3- → 1/2N2 + 3/2NO2- + H+ +3/2H2O • NH4+ + 3/5NO3- → 4/5N2 + 2/5H+ + 9.5H2O • NH4+ + 6/5NO3- → NO2- + 3/5N2 + 4/5H+ + 8/5H2O • NH4+ + NO2- → N2 + 2H2O	• NO3- + 5/3SO + 1/3H2O → 1/2N2 + 5/6(SO+)2- + 2/3H+ • NO2- + 1/2SO → 1/2N2 + 5/6(SO+)2- • NO3- + 5/8HS- + 3/8H+ → 1/2N2 + 5/8(SO+)2- + 1/2H2O • NO2- + 3/8HS- + 5/8H+ → 1/2N2 + 3/8(SO+)2- + 1/2H2O • NO3- + 5HS- + 6H+ → 1/2N2 + 5SO + 3H2O • NO2- + 3HS- + 4H+ → 1/2N2 + 3SO + 2H2O

Characteristics

• • Outstanding nitrification thanks to highly concentrated nitrifying microorganisms in an HBC tank
• • Minimizes the quantity of methane use.
• • Improved treatment performance of the HBC tank thanks to the removal of BOD and COD in the pre-denitrification tank.

Applicable wastewater

Nitrogen-containing wastewater

Applications

Food wastewater, pharmaceutical wastewater, fermentation wastewater, alcohol refinement wastewater, and petrochemical wastewater