Product Introduction
The Fenton reactor is a water treatment equipment based on Fenton advanced oxidation technology. It catalyzes the decomposition of H ₂ O ₂ by Fe ² ⁺ to produce highly oxidative hydroxyl radicals (· OH), which attack organic molecules without selectivity, causing them to mineralize into CO ₂ and H ₂ O or degrade into easily biodegradable small molecule organic compounds, efficiently removing difficult to biodegrade organic compounds. The mainstream product types include: traditional stirred tanks (simple structure, suitable for small and medium water volume), continuous flow reactors (high degree of automation, suitable for medium and large sewage treatment plants), fluidized bed Fenton reactors (filled with carriers such as quartz sand and activated carbon in tower reactors, allowing Fe ³ ⁺ to crystallize on the surface of the carrier to form FeOOH heterogeneous catalysts, achieving partial substitution of Fe ² ⁺, greatly reducing dosage and iron sludge production), and electric Fenton reactors (achieving in-situ regeneration of Fe ² ⁺ and reducing sludge volume through cathodic electrochemical reduction).
Process Selection
1. Selection by treatment stage: For the pretreatment of high concentration refractory organic wastewater, traditional Fenton or Fenton fluidized bed reactors are preferred to significantly improve biodegradability; Upgrading the advanced treatment of biochemical effluent by using electric Fenton or low-dose Fenton reactors to reduce operating costs; For emergency response, a mobile integrated Fenton reactor is selected, which can be quickly deployed and put into use.
2. Select based on water quality characteristics: For high concentration wastewater with COD concentration>2000mg/L, use traditional Fenton reactor; For medium concentration wastewater with COD concentration of 500-2000mg/L, Fenton fluidized bed reactor is selected; For low concentration deep treatment wastewater with COD concentration<500mg/L, electro Fenton or photo Fenton reactors should be used; Wastewater containing high concentrations of chloride ions should be treated with titanium or PTFE lined reactors, and reaction conditions should be controlled to avoid the production of chlorine gas.
3. Selection based on processing scale: For small-scale projects with a daily processing capacity of less than 500m ³, an integrated steel Fenton reactor should be selected; For medium-sized projects with a daily processing capacity of 500-5000m ³, a combination of reinforced concrete tank body and modular equipment is selected; For large-scale projects with a daily processing capacity>5000m ³, a multi grid parallel Fenton reaction tank design is adopted.
4. Selection according to process combination: The front-end needs to be matched with pH adjustment and coagulation pretreatment to remove suspended solids and large particle impurities; The backend must be equipped with a neutralization and precipitation system to remove the iron sludge generated by the reaction; For projects with extremely high effluent requirements, a combination process of "Fenton+activated carbon adsorption" or "Fenton+ultrafiltration" can be used.
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