Jiangsu Engineering Research Center For Digital Textile Inkjet Printing, Key Laboratory of Eco-Textile, Jiangnan University, Ministry of Education, Wuxi, Jiangsu 214122, China.
Jiangsu Engineering Research Center For Digital Textile Inkjet Printing, Key Laboratory of Eco-Textile, Jiangnan University, Ministry of Education, Wuxi, Jiangsu 214122, China; Suzhou Sunmun Technology Co.,Ltd, Kunshan, Suzhou, Jiangsu 215337, China.
Bioresour Technol. 2020 Nov;316:123903. doi: 10.1016/j.biortech.2020.123903. Epub 2020 Jul 25.
Resource utilization of organic matters in tannery sludge has drawn great attention. In this paper, the influences of sludge biochars (BCs) on volatile fatty acids (VFAs) production from the anaerobic digestion of sludge supernatant (SST) were investigated. Experimental results demonstrated that the VFAs yields improved in the presence of BCs with rich functional groups. The maximum yield of VFAs was 1037.5 mg/g SCOD with the addition of BC-1 biochar (zeta potential -50.42 mV). BCs decreased ammonia nitrogen concentration, thus reducing inhibition for bacteria during the anaerobic digestion. Microbial community analysis indicated that the BCs affected microbial community structures and contributed to a favorable environment for bacteria. Especially, the BC-1 biochar with rich functional groups enhanced the relative abundance of acid-forming bacteria (Clostridiales). A dual strategy was proposed to improve the resource utilization efficiency for tannery sludge.
制革污泥中有机物的资源利用引起了广泛关注。本文研究了污泥生物炭（BCs）对污泥上清液（SST）厌氧消化中挥发性脂肪酸（VFAs）生成的影响。实验结果表明，富含官能团的 BCs 可提高 VFAs 的产率。添加 BC-1 生物炭（zeta 电位-50.42 mV）时，VFAs 的最大产率为 1037.5 mg/g SCOD。BCs 降低了氨氮浓度，从而减少了厌氧消化过程中对细菌的抑制作用。微生物群落分析表明，BCs 影响了微生物群落结构，为细菌提供了有利的环境。特别是富含官能团的 BC-1 生物炭增强了产酸菌（Clostridiales）的相对丰度。提出了一种双策略来提高制革污泥的资源利用效率。
