de Paiva Fabio Friol Guedes, Dos Santos Luis Fernando, Tamashiro Jacqueline Roberta, Silva Lucas Henrique Pereira, Teixeira Silvio Rainho, Galvín Adela P, López-Uceda Antonio, Skowera Karol, Kinoshita Angela
University of Western São Paulo-UNOESTE, PGMADRE, Rodovia Raposo Tavares km 572, Presidente Prudente, SP, 19067-175, Brazil.
Solid Waste Characterization and Management Laboratory-SWCML, São Paulo State University-UNESP, Presidente Prudente, SP, 19060-900, Brazil.
Environ Sci Pollut Res Int. 2024 Mar;31(12):17690-17705. doi: 10.1007/s11356-023-28073-z. Epub 2023 Jun 20.
Sugarcane vinasse wastewater (SVW) is one of the most voluminous waste generated in the ethanol industry and usually applied in fertigation. It is characterized by presenting high COD and BOD; thus, continued disposal of vinasse results in negative environmental impacts. In this paper, we investigated the potential of SVW in replacement of water in mortar, rethinking about reuse of effluent, reduction of pollutants in the environment, and water consumption in civil construction. Mortar composites with 0, 20, 40, 60, 80, and 100% of water replaced by SVW were studied in order to determine the optimum content. Mortars with 60 to 100% of SVW result in improved workability and reduction in water demand. The mortars with 20, 40, and 60% SVW resulted in satisfactory mechanical properties, i.e., similar to the control mortar. However, XRD analysis of cement pastes showed that the SVW causes a delay in CH formation, reaching mechanical strength after 28 days. Durability tests results showed that SVW contributes to the mortar becoming more impermeable; therefore, less susceptible to weathering. This study provides an important evaluation of the potential of SVW for application in civil construction, indicating relevant results for replacement of water by liquid wastes in cementitious composites and reduction the use of natural resources.
甘蔗酒糟废水（SVW）是乙醇行业产生的数量最多的废弃物之一，通常用于施肥灌溉。其特点是化学需氧量（COD）和生化需氧量（BOD）高；因此，持续排放酒糟会对环境产生负面影响。在本文中，我们研究了用甘蔗酒糟废水替代砂浆中的水的潜力，重新思考废水的再利用、减少环境中的污染物以及民用建筑中的用水量。研究了用甘蔗酒糟废水替代0%、20%、40%、60%、80%和100%水的砂浆复合材料，以确定最佳含量。用60%至100%甘蔗酒糟废水的砂浆可改善工作性能并减少需水量。用20%、40%和60%甘蔗酒糟废水的砂浆具有令人满意的力学性能，即与对照砂浆相似。然而，水泥浆体的X射线衍射（XRD）分析表明，甘蔗酒糟废水会导致氢氧化钙（CH）形成延迟，28天后达到机械强度。耐久性测试结果表明，甘蔗酒糟废水有助于使砂浆更具抗渗性；因此，更不易风化。本研究对甘蔗酒糟废水在民用建筑中的应用潜力进行了重要评估，为在水泥基复合材料中用废液替代水以及减少自然资源的使用指明了相关结果。
