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生物生態(tài)技術(shù)在治理農(nóng)村水體污染中的應(yīng)用研究

發(fā)布時(shí)間:2021-10-22 15:34
  有限的水資源和確保清潔水的獲得使世界面臨嚴(yán)峻的環(huán)境挑戰(zhàn)。在高度工業(yè)化的國(guó)家,如中國(guó),水污染率很高,導(dǎo)致人類(lèi)消費(fèi)所需的淡水不足。在這方面,大規(guī)模集中的廢水處理系統(tǒng)被認(rèn)為是高度工業(yè)化國(guó)家的特征,并且長(zhǎng)期以來(lái)被認(rèn)為是廢水處理中非常成功的方法。盡管在中國(guó)大規(guī)模的廢水處理系統(tǒng)十分普遍,但該國(guó)仍然繼續(xù)遭受淡水短缺和水資源惡化的影響。特別是,農(nóng)村生活廢水已成為淡水水體污染的重要來(lái)源。本論文建立了耦合生物單位(厭氧折流板反應(yīng)器,缺氧池和好氧單元,A2O)和生態(tài)單位(平流人工濕地)的改良生物生態(tài)A2O-人工濕地系統(tǒng),并確定了該系統(tǒng)的關(guān)鍵性能指標(biāo)。本論文研究了不同季節(jié)(夏季,春季,秋季和冬季)下ABR(厭氧折流板反應(yīng)器)的性能和特性。ABR實(shí)現(xiàn)的COD去除效率分別為74%(夏季),68%(春/秋季),62%(冬季)。在整個(gè)研究期間,室Ⅰ,Ⅱ和Ⅲ顯示出高的COD去除率。在較低的OLR(有機(jī)負(fù)荷)下,COD去除率高。在所有季節(jié),沼氣產(chǎn)量隨著HRT(水力停留時(shí)間)的增加呈下降趨勢(shì)。與其它隔室相比,隔室Ⅰ中VFA(揮發(fā)性脂肪酸)的合成較明顯。ABR仍有達(dá)到更高效率的潛力,并適用于所有類(lèi)型的季節(jié)和溫度條件。對(duì)A2/... 

【文章來(lái)源】:東南大學(xué)江蘇省 211工程院校 985工程院校 教育部直屬院校

【文章頁(yè)數(shù)】:127 頁(yè)

【學(xué)位級(jí)別】:博士

【文章目錄】:
Abstract
摘要
Chapter I Introduction
    1.1. Research Motivation and background
    1.2. Literature review
    1.3. Overview of water and sanitation in China
    1.4. Rural china;an overview
    1.5. Decentralize approach
    1.6. Constructed wetlands
        1.6.1 Types of constructed wetlands
        1.6.2 Pollutant removal mechanisms in constructed wetlands
        1.6.3 Applications of constructed wetlands
    REFERENCES
Chapter II Objectives
    2.1. Problem Definition
    2.2. Objectives
        2.2.1. Lab-scale unit
        2.2.2. Pilot scale unit
Chapter III Material and Methods
    3.1. Experimental site and system configuration
    3.2. Lab-Scale Unit
        3.2.1. Reactor Setup
        3.2.2. A2O-CW working conditions
    3.3. Pilot Scale
    3.4. Analytical methods
    3.5. Equipment and instruments
    3.6. Data Analysis
    REFERENCES
    Lab-ScaleA20-CW
Chapter IV Performance Evaluation of ABR
    4.1. Introduction
    4.2. Material and methods
        4.2.1. Reactor setup
        4.2.2. Sewage Characteristics
        4.2.3. Experimental procedure
        4.2.4. Start-Up Conditions
    4.3. Results and discussion
        4.3.1 COD removal
        4.3.2. Biogas Production
        4.3.3. Volatile fatty acids (VFA)
    4.4. Conclusions
    REFERENCES
Chapter V Identification and Optimization Key Parameters for AnoxicDenitrification and Deodorization
    5.1. Introduction
    5.2. Material and Methods
    5.3. Result and Discussion
        5.3.1 Reflex Ratio impact on COD, NH~(4+)-N and TN removal
        5.3.2. Deoderization
        5.3.3. Effect of nitrogen load and DO on sulfide and TON removal
        5.3.4. Effect of different N/S ratios
        5.3.5. Effect of different C/N ratios
        5.3.6. Effect of HRT
    5.4. Conclusion
    REFERENCES
Chapter VI Overall Performance of A20-CW
    6.1. Introduction
    6.2. Materials and Methods
        6.2.1. A2O-CW system
        6.2.2. Sewage Characteristics
        6.2.3. Analytical Methods
        6.2.4. Bacterial profiling and microbiological analysis
        6.2.5. Data analysis
    6.3. Results and Discussion
        6.3.1 Overall Reactor Performance
        6.3.2. MPN Index of wastewater
        6.3.3. Bacterial profiling
    6.4. Conclusion
    REFERENCES
    Pilot-Scale Hybrid Constructed Wetland System
Chapter VII Kinetics of nutrients uptake by economical vegetables speciesgrown in constructed wetland
    7.1. Introduction
    7.2. Material and methods
        7.2.1. Plant materials
        7.2.2. Uptake kinetics
        7.2.3. Analytical method
        7.2.4. Calculations and statistical analyses
    7.3. Results
        7.3.1 Kinetics of PO_4-P uptake
        7.3.2. Kinetics of NO_3-N uptake
        7.3.3. NH_4-N kinetics
    7.4. Discussion
    7.5. Conclusion
    REFERECES
Chapter VIII Ratio of nitrate to ammonium N effect on nitrogen removal
    8.1. Introduction
    8.2. Materials and Methods
        8.2.1. Plant material and constructed wetland
        8.2.2. Experimental conditions
        8.2.3. Analytical Methods
        8.2.4. Statistical method
    8.3. Results
        8.3.1. NH_4-N removal under different NO_3-N to NH4-N ratio
        8.3.2. NO_3-N removal under different NO_3-N to NH4-N ratio
        8.3.3. Total nitrogen removal under different NO_3-N to NH4-N ratio
    8.4. Discussion
    8.5. Conclusions
    REFERENCES
Chapter IX Nutrients Retention Capacity in hybrid system: Spatial-seasonal variation and effect of vegetation
    9.1. Introduction
    9.2. Material and methods
        9.2.1. Experimental site and system configuration
        9.2.2. Plants material
        9.2.3. Test management
        9.2.4. Analytical methods
        9.2.5. Data analysis
    9.3. Results
        9.3.1. Nutrients removal along the CW beds
        9.3.2. Effect of water depth on removal of nutrients
        9.3.3. Seasonal variation
    9.4. Discussion
    9.5. Conclusion
    REFERECES
Chapter X General Conclusions and Future Perspectives
    10.1. Conclusions
        10.1.1 A2O-CW system
        10.1.2. Hybrid Constructed Wetland system
    10.2. Future perspectives
List of Publications
Acknowledgement


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期刊論文
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