The Suichuan Industrial Park Second Wastewater Treatment Plant has a total design capacity of 30,000 m³/d, with a near-term implementation capacity of 10,000 m³/d. The effluent is required to meet the Grade A standard of the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (GB18918-2002).

In view of the complex composition and large fluctuations of wastewater in industrial parks, the project adopts a refined multi-stage combined process of "enhanced pretreatment + biochemical treatment + advanced treatment." The entire process is closely linked, with checks at every level, presenting four major technical highlights:

A Fenton oxidation system is installed to precisely dose hydrogen peroxide, ferrous salts, and other chemicals. Through advanced oxidation, it efficiently decomposes refractory organic matter while simultaneously removing suspended solids, laying a good foundation for the stable operation of the subsequent biochemical system.

The Bardenpho biochemical tank adopts the MBBR moving bed biofilm process, achieving a synergistic effect of "biofilm + activated sludge." It features high sludge concentration and strong resistance to shock loads, significantly improving nitrogen and phosphorus removal efficiency and effectively responding to influent water quality fluctuations.

The advanced treatment section uses a high-density clarifier, with precise dosing of PAC, PAM, and powdered activated carbon to further remove suspended solids, color, and trace organic matter. It then undergoes fine filtration through cloth filters to ensure that the effluent stably meets the Grade A standard.

The equalization tank is equipped with an emergency tank to effectively contain accidental wastewater and prevent exceedance shocks. Online monitoring rooms are set up at both the inlet and outlet to achieve real-time water quality monitoring. The plant is also equipped with a deodorization system, achieving full green environmental coverage.