The robust organic matter removal in a new packing is intended as pretreatment for wetland polishing of wastewater. The packing was tested with very high organic loads, ranging from 19.41 to 69.45 kg COD/m³d, and hydraulic loads between 2.55 and 3.82 m³/m²d. The effects of flow and concentration of whey on the removal of organic matter were studied using a factorial experimental design, and results confirmed that both variables and the interaction of them affected the removal efficiency. This result confirms that the organic load defines the behavior of a trickling filter. Total nitrogen levels were reduced by an average of 33 %, and ammonium nitrogen was reduced by 57% through cellular assimilation. The kinetic constant was 0.3059 kg COD/m²d with 26 m²/m³ of specific area, in contrast to 0.0693 kg COD/m²d obtained in previous work, where a similar packing design was used with 49 m²/m³ of specific area. These results suggest that at moderate organic loads the higher available volume for air flow increases the reaction rate. The kinetic model also showed a lower constant value with less specific area, indicating that the removal capacity of very high organic loads was reduced.