本文選題：工業(yè)廢水 + 氨氮��； 參考：《中原工學(xué)院》2015年碩士論文

【摘要】：水資源是人類賴以生存的自然資源。近年來,由于人類活動的頻繁和工業(yè)的迅速發(fā)展,產(chǎn)生了大量含氨氮的廢水。氨氮廢水的來源有許多方面,尤其是工業(yè)生產(chǎn)中大量高濃度氨氮廢水的排放已經(jīng)成為不可忽視的環(huán)境問題。工業(yè)合成氨生產(chǎn)過程中產(chǎn)生的氨氮廢水,氨氮的質(zhì)量濃度為400-700mg/L,有的甚至高達(dá)1000-2000mg/L。大量未處理含高氨氮廢水的排放,造成了水體的富營養(yǎng)化,導(dǎo)致水體中藻類的大量繁殖,水體缺氧,魚類大量的死亡。如何高效的處理氨氮廢水已經(jīng)成為國內(nèi)外學(xué)者研究的一個方向。本文以某化肥生產(chǎn)企業(yè)排放的含氨氮工業(yè)廢水為研究對象,總結(jié)了國內(nèi)外對含氨氮工業(yè)廢水的處理技術(shù),并對現(xiàn)有工藝的優(yōu)缺點(diǎn)進(jìn)行了分析,結(jié)合該企業(yè)排放廢水的特點(diǎn),提出了以厭氧氨氧化、短程硝化反硝化和缺氧、好氧相結(jié)合的復(fù)合型生物脫氮技術(shù)為主體的處理工藝流程,即“A/A/O/O+氧化破氰+絮凝+沉淀”組合工藝。本文以上述處理工藝為依據(jù),對該氨氮工業(yè)廢水進(jìn)行工程設(shè)計,確定了各處理工藝單元的設(shè)計參數(shù),經(jīng)過設(shè)計計算得到了水處理構(gòu)筑物以及配套建筑物的結(jié)構(gòu)尺寸,列出了主要設(shè)備配置清單。同時,進(jìn)行了建筑和公用工程的設(shè)計。本工程經(jīng)過土建施工,設(shè)備安裝及工藝調(diào)試后投入正常運(yùn)行。通過對處理出水連續(xù)取樣進(jìn)行分析,結(jié)果顯示,當(dāng)進(jìn)水CODcr=650mg/L,NH3-N=250mg/L,pH=8左右的水質(zhì)條件下,出水中的CODcr=45 mg/L、NH3-N=9.2mg/L均能達(dá)到《合成氨工業(yè)水污染物排放標(biāo)準(zhǔn)》(DB41/538-2008)一級標(biāo)準(zhǔn)的要求。實際運(yùn)行效果表明本工程采用的復(fù)合型生物脫氮技術(shù)能有效地去除廢水中的氨氮,對NH3-N和CODcr的去除率都達(dá)到了90%以上,出水穩(wěn)定達(dá)標(biāo),并且CODcr和NH3-N的年平均減排量分別為1551420kg、653700kg。表明以復(fù)合型生物脫氮技術(shù)為主體的“A/A/O/O+氧化破氰+絮凝+沉淀”組合工藝處理高氨氮工業(yè)廢水是可行的。
[Abstract]:Water resources are the natural resources on which human beings depend. In recent years, due to the frequent human activities and the rapid development of industry, a large amount of wastewater containing ammonia nitrogen has been produced. The source of ammonia nitrogen wastewater has many aspects, especially the discharge of a large amount of high concentration ammonia nitrogen wastewater in industrial production has become an environmental problem that can not be ignored. The mass concentration of ammonia nitrogen in the wastewater from industrial ammonia production is 400-700mg / L, some of which are as high as 1000-2000mg / L. A large amount of untreated wastewater containing high ammonia nitrogen has resulted in eutrophication of water, resulting in the proliferation of algae, hypoxia and death of fish in the water. How to efficiently treat ammonia nitrogen wastewater has become a research direction of domestic and foreign scholars. In this paper, the ammonia and nitrogen industrial wastewater discharged by a chemical fertilizer production enterprise is taken as the research object, the treatment technology of ammonia nitrogen industrial wastewater at home and abroad is summarized, and the advantages and disadvantages of the existing process are analyzed, combined with the characteristics of the wastewater discharged by the enterprise. The combined biological nitrogen removal process, which is composed of anaerobic ammonia oxidation, short cut nitrification and denitrification, anoxic and aerobic, is put forward, that is, the combined process of "A/O/O oxidation of cyanide breaking flocculation and precipitation". Based on the above treatment process, the engineering design of the ammonia nitrogen industrial wastewater is carried out, and the design parameters of each treatment process unit are determined. The structural dimensions of the water treatment structure and the supporting buildings are obtained through the design and calculation. A list of major equipment configurations is provided. At the same time, the design of buildings and public works is carried out. The project after civil construction, equipment installation and process commissioning into normal operation. Through the analysis of the continuous sampling of treated effluent, the results show that when the influent COD crn 650 mg / L NH _ 3-N ~ (2 +) (pH = 8), the CODcr=45 _ (mg / L) NH _ 3-N ~ (2 +) -N ~ (9.2) mg / L of effluent can meet the first class standard of DB41 / 538 ~ (8) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1) ~ (-1). The practical operation results show that the combined biological denitrification technology adopted in this project can effectively remove ammonia nitrogen from wastewater. The removal rates of both NH3-N and CODcr are above 90%, and the effluent reaches the standard steadily, and the annual average emission reduction of CODcr and NH3-N is 1551420kg / kg ~ 653700kg, respectively. The results show that it is feasible to treat high ammonia nitrogen industrial wastewater by the combined process of "A/O/O oxidizing cyanide decomposition flocculation precipitation", which is based on compound biological denitrification technology.
【學(xué)位授予單位】：中原工學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X781.4

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