Effect of hydrothermal pretreatment on volatile fatty acids production from source- - separated organic waste

这项研究引起了我们的极大兴趣，因为它涉及将源分离的有机废物 **（SSO）转化为有价值的产品，如挥发性脂肪酸（VFA）。有机废弃物厌氧消化过程中的VFAs是微生物生产高附加值产品的重要底物，因此其在水解产酸过程中的应用引起了广泛的研究兴趣。VFA是由六个或更少碳原子组成的短链脂肪酸，可以在大气压下蒸馏。这些酸具有广泛的应用（例如生产生物塑料，生物能源等）。VFA ** 主要含有乙酸盐、丙酸盐、异丁酸盐、正丁酸盐、异戊酸盐和正戊酸盐。它们可在某些过程中用作 ** 额外的或外部的碳源（例如从废水中生物去除营养物）。为了在酸化阶段获得高浓度的VFAs，水热预处理（HTP）的参数 ** 如温度、压力、停留时间和混合是重要的。优化的HTP** 可以大大提高水解，然后在产乙酸步骤中将单体发酵成乙酸、丙酸和丁酸 **。该项目的结果将有助于伍尔维奇生物恩公司。扩大其处理有机废物的能力，** 将其转化为有价值的能源，以最大的利润和最小的环境影响。与瑞尔森大学化学工程系的合作也将帮助我们教育 ** 我们的员工了解VFAs生产的主要挑战和优化工艺控制参数的影响。总之，这项工作的成功结果将在地方和国家经济的支持下，以可持续的方式为 ** 加拿大人提供可再生能源。

The proposed research is of great interest to us as it involves a conversion of source separated organic waste**(SSO) into valuable products such as volatile fatty acids (VFAs). VFAs from organic waste in anaerobic**digestion (AD) process during hydrolysis and acidogenesis have drawn extensive research interest, as VFAs are**critical substrates for microorganisms involved in the production of value-added products. VFAs are**short-chain fatty acids consisting of six or fewer carbon atoms, which can be distilled at atmospheric pressure.**These acids have a wide range of applications (e.g. production of bioplastics, bioenergy and others). VFAs**contain mainly acetate, propionate, iso-butyrate, n-butyrate, iso-valerate, and n-valerate. They can be used as an**additional or external carbon source in some processes (e.g. biological removal of nutrients from wastewater).**To obtain a high concentration of VFAs in acidification stage from SSO, it is important to optimize parameters**of hydrothermal pretreatment (HTP) such as temperature, pressure, retention time, and mixing. Optimized HTP**can greatly improve hydrolysis and then subsequently, ferment monomers into acetic, propionic and butyric**acids in acetogenesis step.**The results of this project will help Woolwich Bio-En Inc. to expand its ability to process organic waste,**converting it into valuable energy source with maximum profit and minimal environmental impact.**Collaboration with the Chemical Engineering Department of Ryerson University will also help us to educate**our staff on the major challenges of VFAs production and the effects of optimization process-governing**parameters. In conclusion, successful results of this work would provide renewable energy source for**Canadians in a sustainable manner with support of local and national economies.