Fe/Co-modified Enteromorpha bio-hydrochar enhanced anaerobic digestion of chicken manure with sulfadimethazine:focusing on synergistic mechanism and microbial community succession  

作　　者：Yutong Liu Ziyu Peng Zhengguang Hu Hanhan Xue Junpeng Qiao Qigui Niu 

机构地区：[1]School of Environmental Science and Engineering,China-America CRC for Environment&Health of Shandong Province,Shandong University,72#Jimo BinhaiRoad,Qingdao 266237,Shandong,China. [2]Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse,Shandong University,Qingdao 266237,Shandong,China. [3]Shandong Key Laboratory of Environmental Processes and Health,School of Environmental Science and Engineering,Shandong University,Qingdao 266237,China. [4]Qingdao Key Laboratory of Marine Pollutant Prevention,Shandong University,Qingdao 266237,Shandong,China.

出　　处：《Biochar》2024年第1期1725-1741,共17页生物炭(英文)

基　　金：supported by the National High Technology Research and Development Program of China(2022YFC3700187);National Natural Science Foundation of China(U1806216 and 51608304);Young Scholars Program of Shandong University(2018WLJH53).

摘　　要：Residual antibiotics in chicken manure may interfere with the stability of anaerobic digestion(AD)and inhibit resource utilization efficiency.In this study,we aimed to enhance chicken manure bio-methanation in AD with highconcentration of sulfamethazine(SMZ)by adding metal(Fe,Co)-modified Enteromorpha-based hydrochar(Co-HC,Fe-HC).The results showed that Fe-HC and Co-HC increased the degree of acidogenesis by 1.25 times and 1.58 times,respectively.The maximum protein concentration in EPS was increased by 47.64%and 72.5%after adding Fe-HC and Co-HC.However,only Co-HC demonstrated notable improvements in both methane production and SMZ removal efficiency.Electrochemical analysis showed that Co-HC possessed a richer variety of oxygen and nitrogen functional groups,along with superior electron exchange capabilities compared to Fe-HC.Furthermore,microbiological assessments revealed that Co-HC enriched syntrophic bacteria(such as Syntrophomonas and Mesotoga),facilitating direct interspecies electron transfer(DIET)and subsequently enhancing biomethane production.The abundance of genes involved in electron transfer increased significantly with Co-HC,with a maximum increase of 75.86%in Co1.5-HC treatment.Additionally,the elimination of antibiotic resistance genes(sul1,sul2)increased by 65.66%in the Co1.5-HC treatment.This study offers a theoretical foundation and empirical support for the synergistic improvement of livestock and poultry manure containing high antibiotic concentrations,thereby helping to overcome challenges posed by recalcitrant substances.

关 键 词：Chicken manure digestion Enteromorpha-based hydrochar Metal(Fe or Co)modification Synergistic mechanism Sulfonamide antibiotics 

分 类 号：X70[环境科学与工程—环境工程]