Role of biochar in the granulation of anaerobic sludge and improvement of electron transfer characteristics
Role of biochar in the granulation of anaerobic sludge and improvement of electron transfer characteristics
复制标题
生物炭在厌氧污泥造粒中的作用及改善电子传递特性
DOI：
10.1016/j.biortech.2018.07.116
复制
发表时间：
2018-11-01
影响因子：
11.4
通讯作者：
Zhu, Liang
中科院分区：
文献类型：
--
作者：
Wang, Caiqin;Liu, Yang;Zhu, Liang
为了改善厌氧污泥颗粒化的形成及其电子传递特性，本研究建造了两个升流式厌氧污泥床（UASB）反应器（R1添加4g/L生物炭; R2不添加生物炭）。添加生物炭后，产甲烷滞后时间缩短了28.6%，COD去除率的强化因子达到1.6。同时，R1中颗粒污泥的电导率（23.29 ± 0.99 μ S/cm）是R2中的2倍，颗粒污泥的完整性系数和疏水性得到显著提高。根据微生物群落演替和电子传递特性的结果，添加生物炭不仅有利于厌氧污泥颗粒化作为惰性核心，而且还有利于选择性富集潜在的直接种间电子传递（DIET）伙伴，如甲烷和Geophysicspp。以增强饮食过程。
For improving the formation of anaerobic sludge granulation and its electron transfer characteristics, two upflow anaerobic sludge blanket (UASB) reactors (R1 with 4 g/L biochar; R2 without biochar) were built in this study. With the addition of biochar, the lag time of methanogenesis was shortened by 28.6%, and the strengthening factor of COD removal rate reached 1.6. At the same time, the conductivity of granular sludge in R1 (23.29 +/- 0.99 mu S/cm) was 2-fold of that in R2, and the integrity coefficient and hydrophobicity of granular sludge were improved significantly. According to the results of microbial community succession and electron transfer characteristics, the added biochar not only favors the anaerobic sludge granulation working as an inert core, but also facilitates the selective enrichment of potential direct interspecies electron transfer (DIET) partners such as Methanothrbc and Geobacter spp. for enhancing the DIET process.