本文關鍵詞：零價鐵法處理竹木制漿造紙漂白廢水的研究　出處：《廣西大學》2015年碩士論文　論文類型：學位論文

  更多相關文章： 竹木制漿造紙 漂白廢水 AOX 零價鐵

【摘要】：采用傳統(tǒng)含氯漂白劑漂白技術的制漿造紙企業(yè)產(chǎn)生的漂白廢水具有成分復雜、有毒、處理難度大等特點,是制漿造紙企業(yè)外排廢水的主要來源。為了探索一種經(jīng)濟高效的漂白廢水處理技術,使其車間或生產(chǎn)設施廢水排放口排放的漂白廢水滿足GB3544-2008《制漿造紙工業(yè)水污染物排放標準》的要求,本文以廣西某制漿造紙廠的漂白車間廢水為研究對象,采用實驗室燒杯實驗方法,應用單獨零價鐵法、強化零價鐵法、Fe0-H2O2聯(lián)用法處理漂白廢水,考察其對AOX和COD的去除效果,并分析反應機理,探索優(yōu)化工藝條件。得出的主要結論如下：單獨零價鐵處理漂白廢水時,AOX的降解去除是氫解反應和鐵的混凝作用共同作用的結果,Fe2+還原脫氯反應的能力有限；COD的降解去除主要依賴于體系內(nèi)氫解反應進行的程度。pH對AOX和COD的去除效果是最主要的影響因素,pH值隨反應時間的延長而增大,維持反應體系的pH值在3-4時,pH值呈現(xiàn)快速增長。最佳實驗條件：零價鐵投加量約為l00g/L、初始pH=3.0、反應時間為4h,AOX和COD去除率分別可達65.3%和53.6%。最佳強化零價鐵法為維持反應體系的pH值在3-4、調(diào)節(jié)反應終pH=10,該強化方法在零價鐵投加量為100g/L、初始pH=3.0、反應時間為3h的情況下,最佳AOX去除率可達77.6%。AOX的去除率與反應終pH線性關系方程式：Y=2.029*X+48.51,R2=0.9983。Fe0-H2O2聯(lián)用法能較大地提高漂白廢水中AOX和COD的去除效率,體系內(nèi)Fe2+的濃度是影響AOX降解去除的重要因素,Fe0-H2O2聯(lián)用法擴寬了傳統(tǒng)Fenton法的pH適用范圍。最合適實驗條件：零價鐵投加量約為100g/L、初始pH=3.0、反應時間2hFe0+1hH2O2后調(diào)節(jié)反應終pH=10.0, AOX的去除率可達87.5%。采用單獨零價鐵法、強化零價鐵法和Fe0-H2O2聯(lián)用法處理漂白車間廢水,單獨零價鐵法的效果最差,Fe0-H2O2聯(lián)用法效果最好。在實現(xiàn)達標排放的前提下,最大AOX處理能力分別為：單獨零價鐵法,一般地區(qū)≤38mg/L,需要采取特別保護措施的地區(qū)≤25mg/L；強化零價鐵法：一般地區(qū)≤64mg/L,需要采取特別保護措施的地區(qū)≤43mg/L; Fe0-H2O2聯(lián)用法一般地區(qū)≤122mg/L,需要采取特別保護措施的地區(qū)≤81mg/L。
[Abstract]:Bleaching wastewater produced by pulp and paper mill with traditional bleaching technology containing chlorine bleach has the characteristics of complex composition, toxic and difficult to treat. In order to explore an economical and efficient bleaching wastewater treatment technology, it is the main source of effluent from pulping and papermaking enterprises. The bleach wastewater discharged from the waste water discharge port of its workshop or production facility can meet the requirements of GB3544-2008 "discharge Standard of Water pollutants in Pulp and Papermaking Industry". In this paper, the bleaching wastewater of a pulp and paper mill in Guangxi was studied. The method of laboratory beaker experiment was used to treat bleaching wastewater by using single zero-valent iron method and strengthening the combined use of zero-valent iron method and Fe0-H _ 2O _ 2. The removal efficiency of AOX and COD was investigated, the reaction mechanism was analyzed, and the optimum process conditions were explored. The main conclusions were as follows: the treatment of bleaching wastewater by single zero-valent iron. The degradation and removal of AOX is the result of the combined effect of the hydrogenolysis reaction and the coagulation of iron. The ability of Fe2 reduction dechlorination is limited. The degradation and removal of COD mainly depends on the degree of hydrogenolysis in the system. The removal effect of pH on AOX and COD is the most important factor. The pH value increases with the increase of reaction time. The pH value of the system increases rapidly when the pH value of the system is 3-4. The optimum experimental conditions are as follows: the dosage of zero valent iron is about 10 g / L, the initial pH value is 3.0, and the reaction time is 4 h. The removal rates of AOX and COD were 65.3% and 53.6, respectively. The best strengthening zero-valent iron method was to maintain the pH value of the reaction system between 3 and 4 and to regulate the final reaction pH=10. This method can be used under the conditions of zero valent iron dosage of 100 g / L, initial pH value of 3.0 and reaction time of 3 h. The optimal removal rate of AOX can reach 77.6%. The linear relationship between the removal rate and the final pH of the reaction is 1: y 2. 029 X 48.51. The removal efficiency of AOX and COD in bleaching wastewater can be greatly improved by using R2 + 0.9983. Fe0-H _ 2O _ 2. The concentration of Fe2 in the system is an important factor affecting the degradation and removal of AOX. The optimal experimental conditions are as follows: the dosage of zero valent iron is about 100g / L and the initial pH=3.0 is about 100 g / L. The removal rate of AOX can reach 87.5% after adjusting the final pH of H _ 2O _ 2 for 2 h Fe _ (0.1) h with Fe _ (2) O _ (2) H _ (2) O _ 2. In the treatment of bleaching workshop wastewater by strengthening zero-valent iron method and Fe0-H2O2 combined use, the effect of single zero-valent iron process is the worst and the effect of Fe0-H _ 2O _ 2 combination is the best. The maximum AOX processing capacity is: single zero-valent iron method, general area 鈮，

本文編號：1392823