Federal University of Paraná , Jandaia do Sul , Brazil.
Postgraduation Program in Bioproducts Technology in Agribusiness, Federal University of Paraná (UFPR - Setor Palotina) , Palotina , Brazil.
J Environ Sci Health B. 2019;54(9):791-800. doi: 10.1080/03601234.2019.1669981. Epub 2019 Sep 25.
Sugarcane vinasse is a by-product obtained during ethanol production in sugar-ethanol plants. For each 1 L of ethanol produced approximately 11 L of vinasse are generated. As this residue is obtained in high amounts, it is used as fertilizer in sugarcane crops. However, despite being rich in nutrients, sugarcane vinasse is approximately one hundred times more polluting than domestic sewage, making it an environmental problem. Thus, the aim of the present study was to propose a treatment sequence for sugarcane vinasse and evaluate the possibility of energetic use of the generated sludge in the coagulation/flocculation stage. pH, conductivity, turbidity and decreases in UV/Vis absorption spectra were determined for each treatment step. In addition, the upper calorific value of the generated sludge was also determined, while ash (adsorption treatment) and catalyst (heterogeneous photocatalysis) characterizations were also carried out. At the end of the treatment, initial vinasse turbidity was reduced by 100% and pH and conductivity values were stabilized. The sludge presented a higher calorific value of approximately 3,000 kcal kg and the ash and catalyst displayed favorable characteristics to be applied to the sugarcane vinasse treatment stages.
甘蔗糖蜜是在糖乙醇厂生产乙醇过程中产生的一种副产品。每生产 1 升乙醇，大约会产生 11 升甘蔗糖蜜。由于这种残渣的产量很高，因此被用作甘蔗作物的肥料。然而，尽管甘蔗糖蜜富含营养，但它的污染程度是生活污水的大约一百倍，因此成为了一个环境问题。因此，本研究旨在提出一种甘蔗糖蜜的处理序列，并评估在混凝/絮凝阶段利用所产生的污泥进行能源利用的可能性。对每个处理步骤都测定了 pH 值、电导率、浊度和 UV/Vis 吸收光谱的降低程度。此外，还测定了所产生的污泥的高位热值，同时对灰分（吸附处理）和催化剂（多相光催化）进行了表征。在处理结束时，初始甘蔗糖蜜的浊度降低了 100%，pH 值和电导率值也得到了稳定。污泥的高位热值约为 3000 千卡/千克，灰分和催化剂显示出适用于甘蔗糖蜜处理阶段的良好特性。
