论文总字数：26358字

摘 要

为响应国家深度利用秸秆资源的号召，此次研究特选取稻草秸秆RS进行血红密孔菌菌丝固态发酵预处理，以探究其对生物炭性质的影响及其随热解温度的变化规律。在通氮隔氧条件下，以稻草秸秆RS和被血红密孔菌菌丝固态发酵预处理后的稻草秸秆RS残余物PRS为原料，利用管式炉热解6 h（设定温度300 ℃、500 ℃、700 ℃、900 ℃），得到炭化产物生物炭RRS和生物炭PRS。对其进行理化性质分析（产率分析、电镜扫描、红外光谱分析），和其吸附性能在不同浓度的亚甲基蓝MB溶液的变化，并建立等温吸附模型。

结果表明，随着热解温度的提高，生物炭的产量产率降低，且降低趋势先快后缓；在相同热解条件下，都以相同质量的RS原料为参照，生物炭RRS的产率高于生物炭PRS；以质量相同的RS和PRS为原料作为参照，生物炭PRS的产量则高于生物炭RRS；两类生物炭结构差异并不明显，随着热解温度的提高，部分碎片中的C比重增大，芳香化程度增强，吸附能力增强；吸附过程都更满足Freundlich模型，为多层吸附，容易进行。

综合来看，随热解温度的提高，生物炭PRS的芳香化程度更高，碳质化更明显，结构也更加稳定，且能更好的综合利用稻草秸秆资源，具有应用前景。

关键词：血红密孔菌；生物炭；固态发酵；热解温度；吸附等温模型

Solid Fermentation of Straw by Pycnoporus sanguineus to study its effect on the properties of Straw Biochar

Abstract

In response to the government's appeal for deep utilization of straw resources，in this research, straw RS was selected for the solid-state fermentation pretreatment of Pycnoporus sanguineus hyphae to investigate its effect on the properties of biochar and its changing rules with pyrolysis temperature. Under the condition of nitrogen without oxygen, the straw RS and the PRS residues of the straw RS pretreated by the solid fermentation of Pycnoporus sanguineus were used as raw materials for pyrolysis in a tube furnace for 6 h (set temperature 300 ℃ , 500 ℃, 700 ℃, 900 ℃), then we got the carbonized products: biochar RRS and biochar PRS. Physicochemical properties testing (yield analysis, electron microscope scanning, infrared spectroscopy analysis), and its adsorption performance in different concentrations of methylene blue MB solution were analyzed, and an isothermal adsorption model was established.

The results show that with the increase of pyrolysis temperature, the yield of biochar decreases, and the decreasing trend is fast followed by slow; under the same pyrolysis conditions, using the same quality RS raw material as a reference, the yield of biochar RRS is higher than biochar PRS; while using the same quality RS and PRS as raw materials, the output of biochar PRS is higher than that of biochar RRS; the structural difference between the two types of biochar is not obvious. With the increase of the pyrolysis temperature, the proportion of C in some fragments increases. The number of functional groups on the surface of the biochar changes, and the degree of aromatization improves, and the biochar enhances its adsorption capacity. The adsorption process of the two types of biochar more satisfies the Freundlich model, indicating that this adsorption is a multilayer adsorption and is easy to carry out.

In general, with the increase of pyrolysis temperature, biochar PRS has a higher degree of aromatization, more obvious carbonization, more stable structure, and better comprehensive utilization of straw resources, which has application prospects.

Key Words: Pycnoporus sanguineus; biochar; solid state fermentation; pyrolysis temperature; adsorption isothermal model

目 录

摘 要 I

Abstract II

第一章 绪论 1

1.1研究背景 1

1.2稻草秸秆相关介绍 2

1.3血红密孔菌相关介绍 4

1.3.1血红密孔菌形态 4

1.3.2血红密孔菌应用 4

1.4生物炭相关介绍 5

1.4.1稻草秸秆生物炭 5

1.4.2生物炭优化方法 6

1.4.3生物炭环境应用 6

1.5研究目的及内容 8

第二章 实验材料及内容 9

2.1实验仪器及设备 9

2.2实验材料及溶液配制 10

2.3实验方法 10

2.3.1前期准备 10

2.3.2生物炭原料制备 11

2.3.3生物炭制备 12

2.3.4生物炭相关性能 13

第三章 实验结果与讨论 16

3.1真菌培养情况 16

3.2生物炭产率分析 17

3.3生物炭电镜分析 18

3.4生物炭红外光谱分析 20

3.5生物炭对MB去除率分析 21

3.6生物炭吸附等温模型 23

第四章 结论与展望 27

参考文献 29

致 谢 32

第一章 绪论

1.1研究背景

据研究报道，全世界每年约会产生数十亿吨农业废物。在2005年时，全球估计的农业废物产量就已达到约为44.7亿吨，其中农业秸秆的占比最高。作为世界秸秆产生第一大国的中国，每年农业秸秆总产量可达8.4亿吨，其中稻草秸秆占农业秸秆总产量相对质量密度的25.1 %，约2.1亿吨^[1]。

请支付后下载全文，论文总字数：26358字