Strategies to Reduce Diacetyl and Improve Flavour Stability in a NorthWest Style IPA

浮木酿造公司(DB)是一家盈利良好的精酿啤酒厂，自2008年以来一直在不列颠哥伦比亚省维多利亚经营，拥有近40名员工。不列颠哥伦比亚省的啤酒业正在迅速发展，近年来精酿啤酒的销量几乎增长了两倍；根据不列颠哥伦比亚省政府的数据，精酿啤酒部门在该省估计雇用了2500人，另外还有1500人在啤酒酒吧工作。DB的成功可以归功于创新和对质量的关注。该项目希望在DB最近成功的基础上，解决其销量第一的IPA啤酒中长期存在的管理双乙酰(2，3，丁二酮)水平的问题。双乙酰是一种挥发性有机化合物，是一种已知的缺陷或异味，在酿造过程中产生，并产生黄油的香味和味道。从时间和精力上来说，双乙酰的去除对啤酒厂来说是一笔巨大的支出。目前，乙酰乳酸脱羧酶(ALDC)是在成熟过程中添加的，但标准的推荐剂量尚未被证明有效地将双乙酰水平降低到罐头后可接受的一段时间(长达6个月)的感官阈值以下。DB缺乏设备和仪器来进一步探索双乙酰管理策略，以确保最终罐装啤酒的风味和香气稳定。Camosun学院拥有GC/MS和HPLC系统的访问权限和专业知识，将填补DB的知识空白，并将通过Camosun Innovates和应用化学生物技术(ACBT)计划提供研究支持。

Driftwood Brewing Company (DB) is a profitable and well-established craft brewery with almost forty employees which has been operating in Victoria BC since 2008. The beer industry in BC is growing rapidly, and in recent years craft beer sales have almost tripled; according to the BC government, the craft beer sector employs an estimated 2,500 people in province, with an additional 1,500 working in brewpubs. Success at DB can be attributed to innovation and a focus on quality. This project looks to build on recent success at DB and address a long-standing issue of managing diacetyl (2,3, butanedione) levels in its number one selling IPA beer. Diacetyl is a volatile organic compound and a known defect or off-flavour that is produced during the brewing process and creates a buttery aroma and flavour. Removal of diacetyl represents a significant expenditure to breweries in terms of time and energy. Currently, the enzyme acetolactate decarboxylase (ALDC) is added during maturation, but standard recommended dosages have not been proven effective in lowering diacetyl levels below the sensory threshold for an acceptable period post canning (up to 6 months). DB lacks the equipment and instrumentation to further explore diacetyl management strategies so as to ensure stability in flavour and aroma in the final canned beer. Camosun College has access and expertise to GC/MS and HPLC systems that will fill DB's knowledge gap, and will provide research support through Camosun Innovates and the Applied Chemistry Biotechnology (ACBT) program.