木质素食性白蚁作为一个不为人知但很有前景的细菌来源，可用于生物降解和解毒处理杂酚油处理过的木材，同时提高甲烷产量。
Wood‑feeding termites as an obscure yet promising source of bacteria for biodegradation and detoxification of creosote-treated wood along with methane production enhancement.
机构信息
Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China; Botany Department, Faculty of Science, Tanta University, Tanta 31527, Egypt.
Department of Agricultural Engineering, Faculty of Agriculture, Suez Canal University, Ismailia 41522, Egypt; State Key Laboratory of Pollution Control and Resourses Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
出版信息
Bioresour Technol. 2021 Oct;338:125521. doi: 10.1016/j.biortech.2021.125521. Epub 2021 Jul 8.
This study aims to explore distinct bacterial strains from wood-feeding termites and to construct novel bacterial consortium for improving the methane yield during anaerobic digestion by degrading birchwood sawdust (BSD) and removing creosote (CRO) compounds simultaneously. A novel bacterial consortium CTB-4 which stands for the molecularly identified species Burkholderia sp., Xanthomonas sp., Shewanella sp., and Pseudomonas mosselii was successfully developed. The CTB-4 consortium showed high efficiency in the removal of naphthalene and phenol. It also revealed reduction in lignin, hemicellulose, and cellulose by 19.4, 52.5, and 76.8%, respectively. The main metabolites after the CRO degradation were acetic acid, succinate, pyruvate, and acetaldehyde. Pretreatment of treated BSD mixed with CRO enhanced the total methane yield (162 L/kg VS) by 82.7% and biomass reduction by 54.7% compared to the untreated substrate. CRO showed a toxicity decrease of >90%, suggesting the efficiency of constructed bacterial consortia in bioremediation and biofuel production.
本研究旨在从木质素食白蚁中分离出不同的细菌菌株，并构建新型细菌共生体，通过同时降解白桦木屑（BSD）和去除杂酚油（CRO）化合物来提高厌氧消化过程中的甲烷产量。成功开发了一种新型细菌共生体 CTB-4，其代表的分子鉴定物种为 Burkholderia sp.、Xanthomonas sp.、Shewanella sp. 和 Pseudomonas mosselii。CTB-4 共生体在去除萘和苯酚方面表现出高效性。它还分别显示木质素、半纤维素和纤维素减少了 19.4%、52.5%和 76.8%。CRO 降解后的主要代谢产物为乙酸、琥珀酸、丙酮酸和乙醛。与未处理的底物相比，预处理后的 BSD 与 CRO 混合后，总甲烷产量（162 L/kgVS）提高了 82.7%，生物量减少了 54.7%。CRO 的毒性降低了>90%，表明构建的细菌共生体在生物修复和生物燃料生产方面的效率。
Zotero 插件