DUGi

Tractament d’aigües del Celler de La Vinyeta: aiguamoll i reactor hidrolític

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Wastewater treatment in the wine industry is an environmental challenge that requires efficient and sustainable solutions. This study analyzed the operation of the wastewater treatment system at Celler La Vinyeta, composed of an up-flow hydrolytic reactor (HUSB) and a horizontal subsurface flow treatment wetland, with the aim of evaluating its capacity for water reuse in irrigation and its compliance with European regulations on wastewater treatment (Royal decree 1085/2024, of October 22). Through the monitoring of various physicochemical and microbiological parameters, the study confirmed that the system was capable of significantly reducing the organic and microbiological load of wastewater. The hydrolytic reactor, despite exhibiting some remobilization of organic compounds, played a crucial role in retaining suspended solids (46,37%) and reducing bacteria (2,12 log10 CFU/100 ml). Meanwhile, the wetland achieved deep purification through its natural processes of oxidation, sedimentation, and assimilation by biomass, effectively reducing COD (84,32%), BOD5 (86,24%), and total suspended solids (68%). However, the study also highlighted certain limitations. Despite the good results in contaminant reduction, nitrogen levels (39,95 mg/L) remained above regulatory limits (10 mg/L), which could hinder the agricultural reuse of the effluent. Additionally, the analysis of the reactor sludge indicated excessive compaction in the lower layers, which could hinder water recirculation and lead to the concentration of ions in the remaining liquid. To enhance the system, adjustments to retention times, the implementation of additional nitrification and denitrification processes, and a more efficient sludge management approach were proposed. This research contributed to the development of more sustainable wastewater treatment models in the wine industry, demonstrating that the combination of natural and conventional technologies could be a viable solution for efficient wastewater management

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