The recovery of selected heavy metals from water by the use of Microalgae, and analysis of biofuel produced from this algae

利用微藻从水中回收选定的重金属，并对这种藻类生产的生物燃料进行分析

• 批准号: 1784299
• 金额: --
• 依托单位: Newcastle University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2016
• 资助国家: 英国
• 起止时间: 2016 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1784299
• 关键词: recovery; selected; heavy; metals; water

The overall aim for this project is to determine whether it is feasible to produce biofuels from algae that has been cultivated in wastewater contaminated with heavy metals. It has been previously reported that algae absorb metals internally by an irreversible mechanism, and although there is literature that covers the bio-recovery of metals using algae; these focus on recovering adsorbed metal.This study will address the problems associated with recovering metal that has been internalised within the algae. To achieve this algae will first be cultivated in the presence of heavy metals to ensure that there is a ready source of contaminated biomass. During the cultivation stage, growth and absorption rates will be monitored; and the localisation of the metals within the cells will be determined over time.Algae will then be processed to make the biomass suitable for component extraction. Both lipids and the metals will require purification for further processing downstream. Previous methods have proven to be inefficient in both energy requirements and product yield. A novel technique that is used in biopharmaceutical research has been identified as a possible alternative technique for lipid and protein recovery. This will be compared with established techniques for yield and potential.The lipids will then be converted to biofuels by transesterification and will be analysed for metal content. Further tests will be performed to ensure that the fuel meets the requirements set out by the BS EN590 standards.

该项目的总体目标是确定从重金属污染的废水中培养的藻类生产生物燃料是否可行。此前有报道称，藻类通过不可逆转的机制在体内吸收金属，虽然有文献报道了利用藻类生物回收金属；但这些文献侧重于回收吸附的金属。这项研究将解决与回收已内化在藻类中的金属相关的问题。为了实现这一目标，首先将在存在重金属的情况下培养藻类，以确保有现成的受污染生物质来源。在培养阶段，将监测生长和吸收速度；随着时间的推移，将确定金属在细胞内的定位。然后，将对藻类进行处理，使生物量适合提取成分。油脂和金属都需要提纯，以便在下游进行进一步加工。以前的方法已经被证明在能源需求和产品产量方面都是低效的。一种用于生物制药研究的新技术已被确定为一种可能的脂肪和蛋白质回收的替代技术。这将与现有的产量和潜力技术进行比较。然后，脂类将通过酯交换转化为生物燃料，并将进行金属含量分析。将进行进一步的测试，以确保燃料符合BS EN590标准规定的要求。