咖啡作為全球最受歡迎的商品之一,在生產(chǎn)過程中產(chǎn)生了大量的廢棄物,包括咖啡渣（SCG）、咖啡殼（CH）和咖啡羊皮紙殼（CP）等。然而,丟棄這些原料導(dǎo)致廢物處理不當(dāng)和環(huán)境污染等嚴重問題,因此尋找一種綠色環(huán)保的處理方法成為了研究的熱點。采用厭氧消化技術(shù)處理咖啡廢棄物不但可以解決這一問題,而且有助于生成生物質(zhì)能源,具有顯著的優(yōu)勢。此外,有機負荷（OL）、原料與接種物之比（F/I）和pH等是影響厭氧消化產(chǎn)甲烷性能的關(guān)鍵因素。因此,通過響應(yīng)面法（RSM）分別確定了 SCG、CH和CP的最適厭氧消化條件。實驗結(jié)果表明,在F/I為1.9、OL為28.5g VS/L、初始pH值為6.9的條件下,SCG的最高累積甲烷產(chǎn)量為253.3mL/g VS。對于CH而言,最適F/I、OL和pH 分別為 0.9,28.7g VS/L 和 7.7,而甲烷產(chǎn)量為 189.1mL/g VS。在 F/I為0.9、OL為28.7g VS/L和pH為7.7時,CP的累積甲烷產(chǎn)量為48.0 mL/g VS。隨后,為提高SCG、CP和CH的生物降解率,開展了咖啡廢棄物與禽畜糞便的共消化實驗。結(jié)果發(fā)現(xiàn),當(dāng)SCG與雞糞在1:1的比例下,... 

【文章來源】：北京化工大學(xué)北京市 211工程院校 教育部直屬院校

【文章頁數(shù)】：74 頁

【學(xué)位級別】：碩士

【文章目錄】：
學(xué)位論文數(shù)據(jù)集
摘要
ABSTRACT
Abbreviations
Chapter 1 Introduction
    1.1 World's energy situation
    1.2 Anaerobic digestion (AD) procedure
    1.3 Anaerobic co-digestion
    1.4 Factors that disturb AD process
        1.4.1 Temperature
        1.4.2 pH
        1.4.3 Nature of feedstock
        1.4.4 Annual coffee yield and manure production
    1.5 RSM method
    1.6 Objectives
Chapter 2 Experimental materials and methods
    2.1 Experiment material
    2.2 Experiment reagent
    2.3 Analytical methods and equipment
        2.3.1 Analytical methods
        2.3.2 Experiment equipment
    2.4 Calculation methods of methane production
    2.5 Kinetic analysis
    2.6 Maximum methane potential and biodegradability
    2.7 Results' processing and analysis
Chapter 3 Enhancement of methane production from coffee wastes byresponse surface method (RSM)
    3.1 Introduction
    3.2 Materials and Methods
        3.2.1 Substrates and Inoculum
    3.3 Response surface method (RSM) design
        3.3.1 Anaerobic digestion
        3.3.2 Analytical method
        3.3.3 Second-order polynomial Model analysis
        3.3.4 Theoretical maximum methane yield and biodegradability
        3.3.5 Statistical analysis
    3.4 Results and discussion
        3.4.1 Interpretation and evaluation of the RSM model
        3.4.2 Effect of organic loading, pH and F/I ratio on AD performance
        3.4.3 Optimization of methane production
        3.4.4 VFA, pH and process stability
        3.4.5 SEM analysis
    3.5 Conclusions
Chapter 4 Co-digestion of coffee wastes and manures for methane production
    4.1 Introduction
    4.2 Materials and methods
        4.2.1 Substrates and inoculums
        4.2.2 Analytical methods
        4.2.3 Co-digestion tests
        4.2.4 Theoretical maximum methane yield and biodegradability
        4.2.5 Synergistic effect index
        4.2.6 Kinetic model
    4.3 Results and discussion
        4.3.1 Characteristics of substrates and inoculums
        4.3.2 Carbon to nitrogen ratio of single substrates and mixtures
        4.3.3 SEM analysis
        4.3.4 Biogas generation
    4.4 Conclusions
Chapter 5 Conclusions
References
Acknowledgement
作者導(dǎo)師簡介
附件



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