Enhancing the Efficiency of Preliminary Treatment for Phenol-Containing Wastewater
2026-06-17
Project Overview:
This project involves the upgrading of the wastewater treatment process at a chemical manufacturing enterprise in Shandong Province. The system is designed to treat 500 m³ per day, and the plant previously employed the Fenton oxidation process for treating its production wastewater. The effluent primarily contains organic pollutants such as epoxy resins, phenolic compounds, and glycerol, with an influent COD concentration of up to 3,000 mg/L and poor biodegradability. The existing process suffers from significant drawbacks, including high sludge production and elevated disposal costs.
Project Conclusion:
This process upgrade employs an ozone‑based ultrafine nanobubble technology as the chain‑cleavage pretreatment unit. By leveraging the enhanced oxidative power of ozone facilitated by these ultrafine nanobubbles, refractory macromolecular organic compounds are subjected to ring-opening and chain scission. Following treatment, the wastewater’s B/C ratio increases by 35%, thereby effectively improving its biodegradability and significantly enhancing the operational efficiency of subsequent biochemical treatment stages.
Project results demonstrate that, when substituted for the conventional Fenton process, this technology can reduce hazardous sludge generation at the source by approximately 90%, significantly lowering sludge disposal costs. Moreover, it requires no chemical dosing throughout the entire process, minimizing secondary pollution, and represents an economically viable solution for the efficient, clean pretreatment of high‑concentration chemical wastewater.
(Comparison of wastewater colority at different times)
(Detailed data on wastewater treatment at different time points)
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