Although much progress has been made in recycling components of end-of-life wind turbines, the recycling and reuse of the blades still present significant challenges. A two-stage pyrolysis process was applied in this work to recycle high quality glass fibers from waste wind turbine blades, which were then reused as support to grow heterogeneous photo-Fenton catalyst, zinc oxide nanorods coated by amorphous tin oxide and decorated with nano-zero valent iron (ZnO-SnOx-nZVI) to treat melanoidins, the major pollutant in effluents from distillery and bakery industries with dark brown color and high chemical oxygen demand (COD). Factors influencing the degradation process including pH (3 and 6), the amount of catalyst, and H2O2 dosage, were investigated. More than 97 % decolorization of melanoidin wastewater with 7000 mg/L COD was achieved with only 1/6th of theoretical amount of H2O2 required for Fenton reactions at pH 6. Kinetic studies were conducted to elucidate the correlation between generations of free radicals, unreacted H2O2 at different pH, and the effects on melanoidin degradation, revealing the significant role of pH in both the adsorption of melanoidin and the oxidation potential of radicals. The catalyst was reused three times maintaining 90 % decolorization, thus exhibiting good recyclability. The findings of this work have significant implications in treatment of non-biodegradable organic pollutants, owing to the advantages in avoiding low pH treatment condition, reducing the cost of H2O2, and enhanced chemical stability of photo-Fenton catalyst.