“SBR+人工湿地”组合工艺处理生活污水的试验研究

发布时间：2024-02-14 00:20

　　城市污水处理基础设施的高投入,城市污水厂的高运行费用,管网渗漏造成的二次污染,以及水资源缺乏地区对污水回用的需求,迫切需要运行稳定,低能耗污水处理工艺。本研究将SBR工艺与人工湿地工艺进行组合,用于处理生活污水,以得到该组合工艺处理生活污水的最佳工况条件与最优的经济运行参数,要求充分发挥人工湿地的处理效能,以降低SBR系统的能耗。 在该组合工艺中,人工湿地是自然处理工艺,人工湿地中间设置自然复氧槽可提高湿地内部的溶解氧,为无能耗工艺。SBR系统是活性污泥工艺,须通过供氧来培养活性污泥和保持一定的活性污泥浓度。SBR系统的曝气强度和曝气时间是影响该组合工艺的能耗参数。 常温下(气温≥15℃),活性污泥中微生物生长迅速,SBR中污泥浓度高,对有机污染物的去除效果好。为降低能耗,不断降低SBR的曝气时间,选用运行方式1、2、3,4作为运行工况,曝气时间从5h降低到2h。同时采用限制曝气,将SBR系统控制在低溶解氧状态。出水要求达到《景观用水标准》(GB/T18921-2002)。 低温下(气温<15℃), SBR中活性污泥受到气温变化的影响,活性污泥中微生物活性降低,污泥浓度下降,加之...

【文章页数】：191 页

【学位级别】：博士

【文章目录】：
中文摘要
英文摘要
CHAPTER ONE INTRODUCTION
    1.1 General Introduction
    1.2 Wastewater reuse
        1.2.1 Need for Wastewater Reuse
        1.2.2 Category of Wastewater Reuse
    1.3 Wastewater Treatment and Reuse in China
    1.4 Objective of Present Study
CHAPTER TWO BACKGROUND & LITERATURE REVIEW
    2.1 Introduction
    2.2 Utilization of SBR Technology for Wastewater Treatment
        2.2.1 Municipal Wastewaters
        2.2.2 Reject Water from Wastewater Treatment Plants (WWTPs)
        2.2.3 Winery and Brewery Wastewaters
        2.2.4 Landfill Leachates
        2.2.5 Tannery Wastewaters
        2.2.6 Hypersaline Wastewaters
        2.2.7 Wastewaters from Paper Industry
        2.2.8 Food Industry and Dairy Wastewaters
        2.2.9 Slaughterhouse Wastewaters
        2.2.10 Piggery Wastewaters
        2.2.11 SBBR: SBR with Biofilm
    2.3 Utilization of Wetland Technology for Wastewater Treatment
        2.3.1 Application of Constructed Wetlands
CHAPTER THREE MECHANISMS OF TREATMENT IN SEQUENCING BATCH REACTORS AND CONSTRUCTED WETLANDS
    3.1 Introduction
    3.2 Nutrient problems
    3.3 Biological Nutrient Removal
        3.3.1 Biological Nitrogen Removal
        3.3.2 Biological Phosphorus Removal
    3.4 Sequencing Batch Reactors (SBR)
        3.4.1 Operating Characteristics in SBR Process
    3.5 Constructed Wetland for water pollution control
        3.5.1 Water purification
        3.5.2 Ecological functions
        3.5.3 Constructed Wetlands (CWs)
        3.5.4 Macrophytes
        3.5.5 Treatment Wetland Advantages / Disadvantages
CHAPTER FOUR REACTORS & EXPERIEMENT DESIGN
    4.1 Sequencing Batch Reactors (SBR)
        4.1.1 Description of SBR equipment
    4.2 Constructed Wetland (CW)
        4.2.1 Description of Constructed Wetland
        4.2.2 Selection of the filter media
        4.2.3 Plantation of the Constructed Wetland Cells
    4.3 Experimental Design
        4.3.1 Characteristics of Influent Wastewater
        4.3.2 Experimental Combined Process
        4.3.3 Test Equipment and Analytical Methods
CHAPTER FIVE EXPERIEMENTAL PROCESS
    5.1 Start-up
        5.1.1 SBR start-up
        5.1.2 Constructed Wetland start-up
    5.2 SBR aeration
        5.2.1 Examination of COD removal under different aeration flux
        5.2.2 Examination of ammonia oxidation under different aeration flux
        5.2.3 Variation of DO
    5.3 Experiment Process
CHAPTER SIX RUSELTS & DISCUSSION
    6.1 Performance of Combined Processes under Normal Temperature
        6.1.1 COD Removal at Normal Temperature
        6.1.2 Ammonia Removal at Normal Temperature
        6.1.3 Total Nitrogen (TN) Removal at Normal Temperature
        6.1.4 Total Phosphorus (TP) Removal at Normal Temperature
        6.1.5 Best Operation Cyclic Mode under Normal Temperature
    6.2 Performance of Combined Processes under Low Temperature
        6.2.1 COD Removal at Low Temperature
        6.2.2 Ammonia Removal at Low Temperature
        6.2.3 Total Nitrogen &Total Phosphorus Removals at Low Temperature
        6.2.4 Best Operation Cyclic Mode under Low Temperature
CHAPTER SEVEN CONCLUSIONS
ACKNOWLEDGMENT
REFERENCES
LIST OF PUBLICATIONS



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