基于猪粪水热炭化的生物炭性能及残液成分分析  

Properties and residual liquid composition analysis of biochar obtained after hydrothermal carbonization of pig manure

作　　者：刘玉学[1,2,3] 何莉莉 陈立天 吕豪豪 汪玉瑛[1,2] 杨列 钟哲科[5] 杨生茂 LIU Yuxue;HE Lili;CHEN Litian;LÜHaohao;WANG Yuying;YANG Lie;ZHONG Zheke;YANG Shengmao(Institute of Environment Resource Soil and Fertilizer,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,China;Engineering Research Center of Biochar of Zhejiang Province,Hangzhou 310021,China;College of Environmental and Resource Sciences,Zhejiang A&F University,Hangzhou 311300,China;School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China;China National Bamboo Research Center,National Forestry and Grassland Administration,Hangzhou 310012,China)

机构地区：[1]浙江省农业科学院环境资源与土壤肥料研究所,杭州310021 [2]浙江省生物炭工程技术研究中心,杭州310021 [3]浙江农林大学环境与资源学院,杭州311300 [4]武汉理工大学资源与环境工程学院,武汉430070 [5]国家林业和草原局竹子研究开发中心,杭州310012

出　　处：《农业环境科学学报》2022年第9期2064-2072,共9页Journal of Agro-Environment Science

基　　金：浙江省“三农六方”科技协作项目(2018SNLF018);浙江省科技计划项目(2022C04018)。

摘　　要：为系统研究不同炭化温度条件下猪粪水热炭化规律,本研究以猪粪和发酵猪粪为供试材料,采用水热炭化工艺在系列温度条件下(180、240℃和300℃)制备生物炭,对其元素含量、热稳定性、孔隙结构、表面官能团等理化性质进行表征,并对水热炭化残液进行成分分析。结果表明,猪粪生物炭和发酵猪粪生物炭均具有发达的孔隙结构、丰富的表面官能团等优良特性,其H/C原子比和热失重率均随炭化温度升高而减小,表明热化学稳定性随炭化温度升高而增强。水热炭化残液的成分主要包括有机酸、醇、酯、醛、吡嗪、苯酚等物质,较高炭化温度条件下残液中化合物种类更丰富。与猪粪相比,发酵猪粪水热炭化残液的成分仍然以酚、烯、酮类物质为主,但呋喃、吡啶、吡嗪类毒性化合物消失。研究表明,发酵猪粪在300℃条件下水热炭化的残液用作液态肥料的安全性更高,在资源化利用方面更具优势。The preparation of biochar by hydrothermal carbonization is an important way to realize resource utilization of pig manure.Systematic studies on the hydrothermal carbonization of pig manure under different carbonization temperatures,especially on the composition of residual liquid,are scarce.In this study,pig manure and fermented pig manure were used as test materials to prepare biochar through hydrothermal carbonization process at different temperatures(180,240℃,and 300℃).The physicochemical properties,such as composition,thermal stability,pore structure,and presence of surface functional groups,of the biochars derived from pig manure and fermented pig manure were measured;the composition of the residual liquid obtained during the hydrothermal carbonization was also analyzed.The results showed that the biochar from both pig manure and fermented pig manure had developed a porous structure and abundant surface functional groups.The H/C atomic ratio and thermal weight loss rate of the biochar prepared from pig manure and fermented pig manure decreased with increasing carbonization temperature,indicating increased thermochemical stability with increasing carbonization temperature.The residual liquid obtained during the hydrothermal carbonization of pig manure and fermented pig manure mainly comprised organic acids,alcohols,esters,aldehydes,pyrazines,phenol,and other substances.The compounds in the residual liquid were more abundant at higher carbonization temperature than at lower temperatures.Compared to pig manure,the residual liquid from the hydrothermal carbonization of fermented pig manure mainly comprised phenol,alkene,and ketone,and toxic compounds such as furan,pyridine,and pyrazine were absent.Our results indicate that the residual liquid from the hydrothermal carbonization of fermented pig manure at 300℃can be used as liquid fertilizer having better safety and more advantages in resource utilization.

关 键 词：水热炭化 生物炭 猪粪 发酵 炭化温度 残液 成分分析 

分 类 号：TQ127.11[化学工程—无机化工] X713[环境科学与工程—环境工程]