A simple and fast ultrasound-assisted treatment for demineralization of sugarcane bagasse

Q1 Environmental Science

Bioresource Technology Reports Pub Date : 2025-09-01 DOI:10.1016/j.biteb.2025.102283

Karen Giacobe, Vanessa R. do Nascimento, Paola A. Mello, Cezar A. Bizzi

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Abstract

Demineralization using ultrasonic energy was evaluated to remove the inorganic fraction of sugarcane bagasse. To evaluate the efficiency of the proposed ultrasound-assisted approach, the inorganic fraction (alkaline and alkaline earth metals and other elements - Al, Ba, Ca, Cu, Fe, K, Mg, Mn, Na, P, Sr, and Zn) was monitored in the biomass. The proposed process was developed by evaluating the extracting medium, feedstock amount, acoustic frequency, acoustic amplitude, process temperature and process time. The most efficient condition for the inorganic fraction removal (45 kHz, 70 % amplitude, 1 mol L⁻¹ of H₂SO₄, 50 °C for 30 min) allowed a demineralization efficiency of approximately 100 % (25 g of feedstock). The main feature of this work is related to the capability of this energy source for speeding up the process, which was 90 % efficient since the first minute of treatment, associated with relatively mild operational conditions of pressure and temperature.

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一种简易快速的超声波辅助蔗渣脱矿方法

研究了超声波脱矿对蔗渣无机组分的脱除效果。为了评估超声辅助方法的有效性，对生物质中的无机组分（碱性和碱土金属以及其他元素- Al、Ba、Ca、Cu、Fe、K、Mg、Mn、Na、P、Sr和Zn）进行了监测。通过对提取介质、进料量、声频、声幅、工艺温度和工艺时间的评价，确定了该工艺。无机组分去除的最有效条件（45 kHz， 70%振幅，1 mol L−1 H2SO4, 50°C, 30 min）允许脱矿效率约为100% （25 g原料）。这项工作的主要特点与该能源加速该过程的能力有关，从处理的第一分钟起，该过程的效率为90%，与相对温和的压力和温度操作条件有关。

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