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　　盡量減少有機物和一些營養(yǎng)元素（氮和磷）的含量被認為是城市污水處理廠的關(guān)鍵問題。含有大量營養(yǎng)物質(zhì)或有機質(zhì)的廢水在流入各水域時可能會破壞大自然的平衡。由于活性污泥法的簡單、實用,因此經(jīng)常用來處理市政污水。在活性污泥工藝中,微生物主要是細菌,它們將有機和無機物質(zhì)代謝成生態(tài)友好的形式,導致絮體的自發(fā)聚集。這一過程被稱為生物絮凝,它被認為是污水處理廠有效運行的核心因素�；钚晕勰嗟拿撍�性和沉降性是活性污泥法的兩個重要指標。一方面,污泥沉降性越差,有機物就越容易隨出水流出。另一方面,脫水性差不僅使污泥處理非常復雜,而且耗能耗時。有研究表明,污泥的沉降性和脫水性能與水中離子有關(guān),主要通過DCB（二價陽離子橋）和DLVO（Derjaguin-Landau-yerwey-Overbeek）理論影響污泥的絮凝。本文旨在深入研究去離子化對活性污泥特性和微生物群落的影響。第一章簡要介紹了所調(diào)查主題的背景。第二章是關(guān)于廢水處理機制、活性污泥工藝以及生物絮凝問題的概述。第三章詳細介紹了本文使用的材料和方法。在第四章第一節(jié)中,分別以接種在自來水合成廢水（SWT）和蒸餾水合成廢水（SWD）中的活性污泥為例,研究了去離子... 

【文章來源】：蘭州理工大學甘肅省

【文章頁數(shù)】：70 頁

【學位級別】：碩士

【文章目錄】：
Abstract
摘要
Abbreviation
CHAPTER ONE:INTRODUCTION
    1.1.Background
    1.2.The objective,significance and scope of the study
        1.2.1.The objective and significance of the study
        1.2.2.The scope of the study
    1.3.General Waste Water Treatment Processes（WWTP）
    1.4.Principles of activated sludge system
    1.5.Composition of activated sludge
    1.6.Key factors impacting the activated sludge flocculation
        1.6.1.Origin of wastewater
        1.6.2.Temperature
        1.6.3.Dissolved Oxygen（DO）
        1.6.4.Ions
    1.7.Activated sludge properties related to bioflocculation
        1.7.1.Settleability
            1.7.1.1.Problems in settleability:sludge bulking
            1.7.1.2.Influences of salt on sludge structure and settlement
        1.7.2.Dewaterability
    1.8.Microbiology of activated sludge systems
CHAPTER TWO:MATERIALS AND METHODS
    2.1.Samples collection
    2.2.The main parameter measurement method and experimental instrument
    2.3.The main chemicals used during the experiment
    2.4.Research method
    2.5.Experiment design
    2.6.Analytical methods
        2.6.1.Determination of sludge volume index
        2.6.2.Determination of dewaterability
        2.6.3.Determination of mixed liquor suspended solids
        2.6.4.Determination of mixed liquor volatile suspended solids
        2.6.5.Determination of chemical oxygen demand
CHAPTER THREE:EFFECT OF DEIONIZATION ON CHARACTERISTICS OF ACTIVATED SLUDGE
    3.1.Effect of deionization on the color of activated sludge
    3.2.Effect of deionization on settleability of activated sludge
    3.3.Effect of deionization on dewaterability of activated sludge
    3.4.Effect of deionization on COD removal rate
    3.5.Effect of deionization on MLSS and MLVSS of activated sludge
    3.6.Effect of deionization on MLVSS/MLSS ratio of activated sludge
    3.7.summary
CHAPTER FOUR:EFFECT OF DEIONIZATION ON MICROBIAL COMMUNITY OF ACTIVATED SLUDGE
    4.1.Effect of diversity analysis of bacteria in activated sludge
        4.1.1.Diversity index
        4.1.2.Sample representative dilution curve
        4.1.3.Venn diagram of group differences
    4.2.Classification and composition of bacterial flora in activated sludge
    4.3.Activated sludge multi-sample comparative analysis（beta diversity）
    4.4.Summary
CHAPTER FIVE:CONCLUSIONS AND PROSPECT
    5.1.Conclusions
    5.2.Prospect
References
Acknowledgement
Published paper


【參考文獻】：
期刊論文
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[2]好氧顆粒污泥工藝強化脫氮研究進展[J]. 董晶晶,吳迪,馬柯,徐向陽,朱亮.  應用與環(huán)境生物學報. 2018(01)
[3]耐鹽污泥絲狀菌污泥膨脹的發(fā)生、控制與利用[J]. 葉柳,王淑瑩,劉洋,劉智波,于霞,孫治榮.  化工學報. 2010(01)
[4]產(chǎn)酸克雷伯氏菌的吸附固定及其產(chǎn)氫研究[J]. 黃錦麗,龍敏南,傅雅婕,陳重安,王晰,孫中梅,魏文鈴.  廈門大學學報(自然科學版). 2005(05)



本文編號：2902262