Advanced Biofuels and Bioproducts Unit, Renewable Energies Department, CIEMAT, Madrid, 28040, Spain.
Advanced Biofuels and Bioproducts Unit, Renewable Energies Department, CIEMAT, Madrid, 28040, Spain.
J Environ Manage. 2022 Jun 15;312:114931. doi: 10.1016/j.jenvman.2022.114931. Epub 2022 Mar 23.
The widespread use of wipes and other sanitary products made of nonwoven fibres has led to an enormous problem in wastewater treatment systems that has been underestimated for some time. To date, there are no practical alternatives for recycling and valorisation. In this study, cellulosic rejections recovered from a wastewater treatment plant in Barcelona (Spain) were characterised and treated using hydrothermal and enzymatic methods to obtain free sugars. Steam explosion and autoclave pre-treatments were performed at different temperatures (120, 130, or 150 °C) and residence times (10-40 min) under neutral, acidic or basic conditions. The solids obtained after the pre-treatment, as well as the untreated material, were subjected to enzymatic hydrolysis using commercial enzymes. The untreated substrate reached the highest sugar production: 29 g glucose and xylose per 100 g of the cellulosic rejections, equivalent to 86% of the sugars contained in the initial material. These sugars can subsequently be transformed into biofuels or bioproducts within a biorefinery approach.
非织造纤维制成的擦拭物和其他卫生产品的广泛使用，导致废水处理系统中存在一个长期被低估的巨大问题。迄今为止，还没有实用的回收和增值替代品。在这项研究中，从西班牙巴塞罗那的一家废水处理厂回收的纤维素废料进行了特性分析，并采用水热和酶法处理，以获得游离糖。在中性、酸性或碱性条件下，对不同温度（120、130 或 150°C）和停留时间（10-40 分钟）进行了蒸汽爆破和高压釜预处理。预处理后获得的固体以及未经处理的材料，使用商业酶进行酶水解。未经处理的底物达到了最高的糖产量：每 100 克纤维素废料产生 29 克葡萄糖和木糖，相当于初始材料中所含糖的 86%。这些糖可以随后在生物炼制厂方法中转化为生物燃料或生物制品。
