Producing methane from lignin degradation byproducts

利用木质素降解副产物生产甲烷

• 批准号: RGPIN-2020-07124
• 负责人: Lalman, Jerald
• 金额: $ 2.04万
• 依托单位: University of Windsor
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=741611
• 关键词: Producing; methane; lignin; degradation; byproducts

Converting waste organic materials into chemicals and fuels are a means to combat global issues such as depleting fossil fuels inventories, climate change and energy security. Major source of wastes materials available for producing fuels and chemicals are available from facilities producing products such as vegetable oils, ethanol, sugar and flour. These products are employed in producing numerous consumer products. Manufacturing facilities produce waste byproducts containing lignin, a complicated chemical, which cannot be added to food products. Many microorganisms are unable to utilize lignin because it is not very susceptible to chemical attack by enzymes. Hence, a research shift must be focused on developing non-microbial processes for converting lignin into valuable chemicals. Cellulose, hemicellulose and lignin are the major chemical components in biomass such as wood. In comparison, carbohydrates are produced from crops such as corn, beet, wheat and sugar cane. Wastes byroducts from sugar cane, wheat and beet processing into foods are rich in lignin. In Canada, the pulp and paper sector produces paper products and a lignin rich waste from soft and hard woods. The pulp and paper sector is important to Canada's economy and developing technologies to convert lignin into value added products will assist in sustaining a competitive edge of this industry. The Canadian pulp and paper sector and other similar global industries produce black liquor, a low value waste. Lignin can be extracted from waste streams such as black liquor. In the proposed work, lignin will be extracted from black liquor using protic ionic liquids. The extracted lignin will be employed to produce biodegradable chemicals utilizing photoactivated chemicals such as titanium dioxide and zinc oxide as well as modified titanium dioxide, zinc oxide catalysts as well as oxidants such as ozone and hydrogen peroxide. Titanium dioxide and zinc oxide are commercially available and the ability of these metals to breakdown lignin depends on utilizing light and other factors. In the final project stage, naturally occurring bacteria will be employed to produce methane from the byproducts from the photocatalytic process and chemical oxidants. Methane is a valuable fuel which can be utilized in the residential, industrial and transportation sectors.

将废物有机材料转换为化学物质和燃料是解决全球问题的一种手段，例如耗尽化石燃料库存，气候变化和能源安全。可用于生产燃料和化学品的主要废物材料的主要来源可从生产植物油，乙醇，糖和面粉等产品的设施中获得。这些产品用于生产众多消费产品。制造设施产生含有木质素的废物副产品，一种复杂的化学物质，无法添加到食品中。许多微生物无法使用木质素，因为它不太容易受到酶的化学攻击。因此，研究转变必须集中于开发非微生物过程，以将木质素转化为有价值的化学物质。纤维素，半纤维素和木质素是木材等生物量的主要化学成分。相比之下，碳水化合物是由玉米，甜菜，小麦和甘蔗等农作物产生的。甘蔗，小麦和甜菜加工到食物中的废物造成木质素富含木质素。在加拿大，纸浆和造纸业生产纸产品以及柔软和硬木材的木质素富含废物。纸浆和造纸业对加拿大的经济很重要，并开发了将木质素转化为增值产品的技术，将有助于维持该行业的竞争优势。加拿大纸浆和造纸业以及其他类似的全球行业生产黑酒，低价值浪费。木质素可以从诸如黑酒等废物流中提取。 在拟议的工作中，将使用普罗尼克的离子液体从黑液中提取木质素。提取的木质素将用于生产可生物降解的化学物质，利用光活化化学物质（如二氧化钛和氧化锌）以及改良的二氧化钛，氧化锌催化剂以及氧化剂（例如臭氧和氧化氢）。二氧化钛和氧化钛可商购，这些金属分解木质素的能力取决于利用光和其他因素。在最后一个项目阶段，将使用自然存在的细菌从光催化过程和化学氧化剂中从副产品中产生甲烷。甲烷是一种有价值的燃料，可用于住宅，工业和运输部门。