Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK.
School of Biosciences, University of Nottingham, Nottingham NG7 2RD, UK.
Waste Manag. 2019 Apr 15;89:177-189. doi: 10.1016/j.wasman.2019.04.003. Epub 2019 Apr 6.
In 2015/2016, the total municipal solid waste (MSW) collected by local authority in the U.K. was 26 million tonnes and over 57% is still put into landfill or incinerated. MSW is a promising feedstock for bio-butanol production as it has a high lignocellulosic fibre content such as paper, wood, and food waste, about 50 wt% of a typical MSW stream. The study evaluates acetone, butanol, ethanol and hydrogen production from autoclaved municipal solid waste feedstock. Life cycle assessment is undertaken to evaluate the acetone, butanol, ethanol and hydrogen production process, considering cogeneration of heat and power from residual biogenic waste based on experimental data and process modelling. Acetone, butanol, and ethanol product yield can be achieved at 12.2 kg butanol, 1.5 kg ethanol, 5.7 kg acetone, and 0.9 kg hydrogen per tonne MSW. The product yield is relatively low compared to other lignocellulosic feedstocks primarily because of the lower hydrolysis yield (38% for glucose) achieved in this study; however, hydrolysis yields could be improved in future optimisation work. The conversion shows a net primary energy demand of -1.11 MJ/MJ liquid biofuels (butanol and ethanol) and net greenhouse gas emission of -12.57 g COeq/MJ liquid biofuels, achieving a greenhouse gas reduction of 115% compared to gasoline comparator.
2015/2016 年，英国地方当局收集的城市固体废物总量为 2600 万吨，其中仍有超过 57%的垃圾被填埋或焚烧。城市固体废物是生产生物丁醇的很有前途的原料，因为它含有高木质纤维素纤维，如纸张、木材和食物垃圾，约占典型城市固体废物流的 50wt%。本研究评估了从高压灭菌城市固体废物原料生产丙酮、丁醇、乙醇和氢气。通过生命周期评估来评估丙酮、丁醇、乙醇和氢气的生产过程，考虑基于实验数据和过程建模，从剩余生物源废物中热电联产。每吨城市固体废物可生产 12.2kg 丁醇、1.5kg 乙醇、5.7kg 丙酮和 0.9kg 氢气。与其他木质纤维素原料相比，该产品的产率相对较低，主要是因为本研究中实现的水解产率（葡萄糖为 38%）较低；然而，在未来的优化工作中，水解产率可以提高。该转化显示液体生物燃料（丁醇和乙醇）的净初级能源需求为-1.11MJ/MJ，净温室气体排放为-12.57g COeq/MJ 液体生物燃料，与汽油比较器相比，温室气体减排了 115%。
