本文選題：垃圾滲濾液　切入點(diǎn)：臭氧　出處：《南昌大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：臭氧作為目前高級(jí)氧化技術(shù)中重要的氧化劑,具有氧化能力強(qiáng)、氧化速度快等特點(diǎn),已經(jīng)被運(yùn)用處理高濃度有機(jī)廢水。垃圾滲濾液是一種含有高分子、難降解有機(jī)物的廢水,目前的傳統(tǒng)生化處理已經(jīng)很難達(dá)到處理排放標(biāo)準(zhǔn)。臭氧高級(jí)氧化技術(shù)+生化處理作為新一代垃圾滲濾液處理工藝,不僅能夠降低處理成本,而且易于形成模塊化管理,已越來越受到工程界的重視。本文采用UV/H2O2/O3組合工藝對(duì)垃圾滲濾液二級(jí)出水進(jìn)行試驗(yàn)研究,探究了最佳處理操作條件,并針對(duì)UV/H2O2/O3組合工藝體系設(shè)計(jì)了一套適用于此體系的光化學(xué)反應(yīng)器,對(duì)高級(jí)氧化降解過程中的有機(jī)物進(jìn)行了分析。通過實(shí)驗(yàn)分析,可以得出以下結(jié)論:(1)在室溫20±1℃環(huán)境下,UV/H2O2/O3組合工藝對(duì)垃圾滲濾液二級(jí)出水進(jìn)行深度氧化處理的最佳操作條件是:反應(yīng)時(shí)間為180min、紫外光強(qiáng)度為10W、臭氧進(jìn)氣流量為160L/h、30%雙氧水用量為50mL/L,pH為9。在最佳的操作條件下,COD、氨氮和色度的去除率分別為:84.22%、100%、99.38%。廢水的可生化性得到顯著提高,B/C由原來的0.01處理后提升到0.31,增幅比較明顯。(2)設(shè)計(jì)的新型光化學(xué)反應(yīng)器不僅解決了色度對(duì)光化學(xué)氧化的處理影響問題,而且還通過采用尾氣回用方式進(jìn)一步提高臭氧利用率,使平均臭氧利用率由原來的80.03%提升到現(xiàn)在的87.22%,提升了7.19%,節(jié)約了深度處理垃圾滲濾液的處理成本。(3)為了探究垃圾滲濾液在高級(jí)氧化過程中有機(jī)物降解過程,進(jìn)一步了解有機(jī)物降解機(jī)理,本試驗(yàn)采用GC-MS對(duì)高級(jí)氧化處理后有機(jī)物進(jìn)行測試,得到了氧化過程中有機(jī)物的分解過程。通過分析可以得到,經(jīng)過UV/H2O2/O3組合工藝處理后有機(jī)物不僅在成分上,而且在有機(jī)物種類上都得到明顯的改善。在氧化過程中高分子物質(zhì)被羥基自由基攻擊分解為能夠被檢測到的小分子物質(zhì);出水中還明顯檢測分析出更多的鹵代烴,說明原液中的鹵代基團(tuán)受到羥基自由基的破壞,形成了鹵代離子和新的烷烴類物質(zhì)重新結(jié)合成新的鹵代烷烴物質(zhì)。
[Abstract]:Ozone, as an important oxidant in advanced oxidation technology, has been used to treat high concentration organic wastewater because of its strong oxidation ability and high oxidation speed. Landfill leachate is a kind of wastewater containing macromolecule and difficult to degrade organic matter. At present, the traditional biochemical treatment has been difficult to meet the emission standard. As a new generation of landfill leachate treatment process, the advanced ozonation technology biochemical treatment can not only reduce the treatment cost, but also be easy to form modular management. More and more attention has been paid to the secondary effluent of landfill leachate by UV/H2O2/O3 combined process, and the optimal operating conditions have been explored in this paper. A photochemical reactor suitable for the UV/H2O2/O3 system was designed, and the organic matter in the process of advanced oxidation degradation was analyzed. The following conclusions can be drawn: (1) the optimal operating conditions for advanced oxidation of landfill leachate secondary effluent by UV / H _ 2O _ 2 / O _ 3 combination process at room temperature 20 鹵1 鈩，

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