本文關鍵詞：Fenton預處理—鐵強化厭氧反應器處理染料廢水　出處：《大連理工大學》2015年碩士論文　論文類型：學位論文

  更多相關文章： 染料廢水 零價鐵 厭氧反應 Fenton氧化

【摘要】：與物理法和化學法相比,使用生物法處理染料廢水運行維護成本更低,具有更好的經(jīng)濟效益。在生物法中,采用厭氧微生物反應器處理染料廢水,在很好的控制處理成本的同時,具有較高的環(huán)境友好性。然而高濃度有機廢水對微生物的毒性,會影響廢水的礦化效果。染料的生產(chǎn)屬于典型的精細化工生產(chǎn)過程,生產(chǎn)過程中產(chǎn)品種類轉換快,且多為復雜的化學反應過程,造成染料廢水中有機物含量多且成分復雜,可生化性差,不宜直接利用生物法進行降解。利用高級氧化和厭氧消化技術相結合,可以有效去除難降解的高毒性有機污染物。零價鐵已經(jīng)被證明可以有效維持反應器內(nèi)的厭氧環(huán)境,促進厭氧水解酸化,提高厭氧反應器對有機物的處理能力。而零價鐵對高濃度染料廢水的兩相厭氧處理中產(chǎn)甲烷過程的影響,尤其是對經(jīng)過Fenton預處理后的廢水的厭氧處理,研究較少。因此本實驗以某染料生產(chǎn)工廠產(chǎn)生的高濃度染料廢水作為處理對象,通過Fenton高級氧化技術預處理與厭氧生物處理技術相結合,考察零價鐵對兩相厭氧反應器產(chǎn)甲烷段的強化作用。本論文基于以上設想展開研究,并得到了以下結論：1、利用Fenton氧化技術對高濃度有機廢水進行預處理,通過采用COD:H2O2:Fe2+質(zhì)量比為1：0.3：0.2,將染料廢水的可生化性由0.0808提高到了0.3350,為后續(xù)的生物處理提供良好的基礎。2、通過向兩相厭氧反應器產(chǎn)甲烷段添加零價鐵,考察零價鐵對兩相厭氧反應器產(chǎn)甲烷段的強化作用。與傳統(tǒng)厭氧反應器相比,COD去除率由60%提高至87%,甲烷產(chǎn)量由0.17 L/h提高到了0.26 L/h,零價鐵的添加對厭氧反應器具有明顯的促進作用。3、零價鐵作為還原劑,降低反應器內(nèi)的氧化還原電位,優(yōu)化厭氧微生物的生存環(huán)境。零價鐵與有機酸的反應在降低反應器內(nèi)H+含量的同時,可有效富集嗜氫產(chǎn)甲烷菌,提高H2利用率,降低H2分壓,促進有機酸的分解代謝,提高對廢水中有機物礦化的效果。4、零價鐵在厭氧反應器反應過程中生成鐵離子,鐵離子作為營養(yǎng)物質(zhì)被微生物所利用,提高了厭氧反應器污泥中的鐵離子含量。同時,厭氧微生物消耗零價鐵表面的氧化產(chǎn)物,維持了零價鐵對有機污染物的還原降解能力。5、將Fe3+加入?yún)捬醴磻髦?可提高厭氧污泥中鐵還原菌的活性,通過電子傳遞還原Fe3+的同時氧化降解有機物,提高了COD的去除效果。因此作為工業(yè)廢料的鐵屑可不經(jīng)過去除表面鐵銹的前處理,待鐵屑表面的鐵銹消耗完之后,即可作為零價鐵繼續(xù)發(fā)揮對厭氧反應器的強化作用。
[Abstract]:Compared with physical method and chemical method, biological method of dye wastewater treatment operation and maintenance cost is lower, it has better economic benefit. In the biological process, the anaerobic reactor for the treatment of dye wastewater, in good control of processing costs at the same time, environmental friendliness is higher. However, the high concentration organic wastewater on microorganisms the toxicity will affect the effect of mineralization. Dye production wastewater is a typical chemical production process, the production process products fast conversion, and more complex chemical reactions, resulting in dye wastewater organic matter content and complex composition and poor biodegradability, not directly degraded by biological method combined. The use of advanced oxidation and anaerobic digestion technology, can effectively remove the high toxicity of organic pollutants are difficult to degrade. Zero valent iron has been shown to effectively maintain the anaerobic environment inside the reactor, To promote the anaerobic hydrolysis acidification, improve the processing ability of anaerobic reactor for organic compounds. And zero valent iron in High Concentration Dye Wastewater two-phase anaerobic methanogenic process, especially after the anaerobic treatment of wastewater pretreated by Fenton research less. Therefore the high concentration of dye wastewater in this experiment, a production factory dye as the processing object, through the combination of Fenton technology of advanced oxidation pretreatment and anaerobic biological treatment technology, investigation of zero valent iron on the strengthening effect of two-phase anaerobic reactor methane production period. This thesis launches the research based on the above idea, and got the following conclusions: 1, the high concentration organic wastewater was treated by Fenton oxidation by using COD:H2O2:Fe2+ technology, the ratio of 1:0.3:0.2, the biodegradability of dyeing wastewater was increased from 0.0808 to 0.3350, to provide a good basis for the subsequent biological treatment The.2 foundation, through to the two-phase anaerobic reactor methane production period of adding zero valent iron, effects of zero valent iron on the strengthening effect of two-phase anaerobic reactor methane producing period. Compared with the traditional anaerobic reactor, the removal rate of COD increased from 60% to 87%, methane production increased from 0.17 L/h to 0.26 L/h, adding zero valent iron has a significant effect on the.3 anaerobic reactor, zero valent iron as a reductant to reduce the oxidation-reduction potential of the reactor, optimization of anaerobic microbial environment. Zero valent iron and organic acid in the reaction to reduce the content of H+ in the reactor at the same time, can effectively enrich thermophilic hydrogen and methane bacteria, improve H2 the utilization rate, reduce the partial pressure of H2, promote the decomposition of the organic acid metabolism, improve the effect of.4 on organic matter in wastewater mineralization, zero valent iron generated in the reaction of anaerobic reactor in the process of iron ions, iron ions as nutrients by microorganisms, improve the anaerobic reactor The iron content in sludge. At the same time, anaerobic microorganisms consume zero valent iron surface oxidation products, to maintain the ability of.5 zero valent iron reductive degradation of organic pollutants, add Fe3+ anaerobic reactor, anaerobic sludge can improve the iron reducing bacteria activity, through electron transfer reduction of Fe3+ and oxidative degradation of organic compounds. To improve the removal efficiency of COD. So as the industrial waste scrap iron without pretreatment to remove surface rust, iron after surface rust consumed, can be used as zero valent iron continue to play a strengthening of the anaerobic reactor used.

【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：X788

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本文編號：1411570