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<p>The dried meat industry generates high-strength wastewater containing organic matter, fats, proteins, and salts, which poses environmental risks if untreated. This study evaluated a pilot-scale integrated treatment system comprising equalization (EQ), grease trap (GT), anaerobic filter (AF), two sequential activated sludge reactors (AS), and coagulation/sedimentation (CT). The system was operated for six months under batch conditions, with monitoring of COD, BOD₅, total Kjeldahl nitrogen (TKN), total phosphorus (Pt), pH, and electrical conductivity (EC). Kinetic analyses indicated that COD and BOD₅ removal in both anaerobic (AF) and aerobic (AS) stages followed first-order decay models, with high determination coefficients (R<sup>2</sup> &gt; 0.98). The AS stage achieved 85.7% BOD₅ and 91.9% COD removal, and the coagulation/sedimentation process contributed to additional reductions of 64.0% and 61.5%, respectively, in addition to removing micro-sludge that could not be settled by gravity in the activated sludge system. Overall, the integrated system provided global efficiencies of 97.6% for BOD₅ and 98.5% for COD. Nutrient removal was also significant, reaching 93.8% for TKN and 95.8% for total phosphorus, with effluent pH maintained within regulatory limits. Principal Component Analysis (PCA) confirmed the correlation between treatment stages and water quality parameters, highlighting the robustness of the sequential configuration. The results demonstrate that the proposed pilot-scale system is efficient, resilient to high salinity, and a promising solution for wastewater management in the dried meat industry.</p>

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Integrated Pilot-Scale Approach for Effective Treatment of Dried Meat Industry Wastewater

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月2日

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  • Henrique Vieira de Mendonça,
  • Mônica Silva dos Santos,
  • Conan Ayade Salvador

摘要

The dried meat industry generates high-strength wastewater containing organic matter, fats, proteins, and salts, which poses environmental risks if untreated. This study evaluated a pilot-scale integrated treatment system comprising equalization (EQ), grease trap (GT), anaerobic filter (AF), two sequential activated sludge reactors (AS), and coagulation/sedimentation (CT). The system was operated for six months under batch conditions, with monitoring of COD, BOD₅, total Kjeldahl nitrogen (TKN), total phosphorus (Pt), pH, and electrical conductivity (EC). Kinetic analyses indicated that COD and BOD₅ removal in both anaerobic (AF) and aerobic (AS) stages followed first-order decay models, with high determination coefficients (R2 > 0.98). The AS stage achieved 85.7% BOD₅ and 91.9% COD removal, and the coagulation/sedimentation process contributed to additional reductions of 64.0% and 61.5%, respectively, in addition to removing micro-sludge that could not be settled by gravity in the activated sludge system. Overall, the integrated system provided global efficiencies of 97.6% for BOD₅ and 98.5% for COD. Nutrient removal was also significant, reaching 93.8% for TKN and 95.8% for total phosphorus, with effluent pH maintained within regulatory limits. Principal Component Analysis (PCA) confirmed the correlation between treatment stages and water quality parameters, highlighting the robustness of the sequential configuration. The results demonstrate that the proposed pilot-scale system is efficient, resilient to high salinity, and a promising solution for wastewater management in the dried meat industry.