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Climate resilient products development through valorization of Eichhornia crassipes to biofuel and biochar
International Journal of Environmental Science and Technology ( IF 3.0 ) Pub Date : 2021-07-05 , DOI: 10.1007/s13762-021-03523-8
S. Hasan 1 , H. Jaya 1 , R. Girindran 2 , P. U. Zacharia 2 , R. Kooren 2 , P. Sayooj 2 , S. Benny 2 , D. Joseph 2 , S. V. Hussain 2
Affiliation  

In the context of climate change-induced nutrient enrichment, followed by rigorous spread of water hyacinth (Eichhornia crassipes), a mitigation strategy was envisaged to convert the substrate into biochar and biofuel. Lignocellulosic compositional analyses were performed, and the pretreatment of the substrate was done with a concentration of 0.1% of hydrogen peroxide at two varying pH (4 and 11.5). Acid hydrolysis was carried out on raw and pretreated substrates, followed by estimation of reducing sugar yield. It was found that pretreatment at pH 4 increases the reducing sugar content and was selected for further fermentation process. Fermentation was carried out with the yeast Saccharomyces cerevisiae for 48 h at 30 °C in a rotary shaker at 120 rpm. Presence of bioethanol was further detected by high-performance liquid chromatography. Biochar production from water hyacinth was attained by pyrolysis technique in a muffle furnace under the pre-optimized conditions of 300 °C after 30 min. The produced biochar was experimented for heavy metal (Zinc) remediation under laboratory conditions. The heavy metal (Zinc) analysis indicated efficacy of water hyacinth biochar in heavy metal removal from 2 ppm to 1.0265 ppm by 3 days, which implies the possibility to use the derived biochar as a remedial means of contaminated aquaculture sites.



中文翻译:

通过将凤眼莲转化为生物燃料和生物炭来开发气候适应型产品

在气候变化引起的养分富集以及水葫芦(Eichhornia crassipes)的严格传播的背景下,设想了一种缓解策略,将基质转化为生物炭和生物燃料。进行木质纤维素成分分析,并在两种不同的 pH 值(4 和 11.5)下用 0.1% 的过氧化氢浓度对基材进行预处理。对原始和预处理的底物进行酸水解,然后估计还原糖产量。结果发现,pH 4 的预处理增加了还原糖含量,并被选择用于进一步的发酵过程。用酵母酿酒酵母在 30°C 下在 120 rpm 的旋转振荡器中发酵48 小时通过高效液相色谱进一步检测到生物乙醇的存在。在预先优化的 300 °C 条件下,30 分钟后,在马弗炉中通过热解技术从水葫芦生产生物炭。在实验室条件下对生产的生物炭进行重金属(锌)修复实验。重金属(锌)分析表明,水葫芦生物炭在 3 天内将重金属从 2 ppm 去除到 1.0265 ppm,这意味着可以使用衍生的生物炭作为污染水产养殖场的补救措施。

更新日期:2021-07-05
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