本文選題：分散染料　切入點：生物降解　出處：《東華大學》2016年碩士論文

【摘要】：隨著滌綸紡織品的廣泛應用,上染滌綸纖維最常用的分散染料的品種和用量也在逐年增長,隨之而來的分散染料廢水成分越來越復雜、廢水量也越來越大。目前,在染料廢水處理方法中仍以生物法為主,分散染料廢水生物降解問題是廢水處理的一個重點問題。本實驗即是考察了厭氧、好氧、厭氧/好氧交替3種不同條件下Neocron Black、Rhodamine B、分散大紅S-BWFL、分散紅S-5BL這4種分散染料的降解情況。并通過剩余染料濃度和COD值來分析染料的降解速率和初始反應條件對降解過程的影響,同時通過氣相色譜-質(zhì)譜聯(lián)用(GS-MS)測定降解中間產(chǎn)物,分析其降解歷程。本研究結(jié)果可為分散染料廢水的生物降解提供可行性支持,也對其可能的降解產(chǎn)物提供依據(jù)。(1)在好氧、厭氧、厭氧/好氧條件下,采用活性污泥法降解分散染料Neocron Black(NB),研究該染料的生物降解特性,并初步探討該染料的生物降解過程。研究結(jié)果表明,NB染料在好氧條件下降解率最高,厭氧/好氧交替條件次之,厭氧條件下染料降解率最低;隨著進水染料濃度的增加,微生物對染料的降解率逐漸下降,而添加易生物降解碳源可以促進NB染料的降解;NB染料降解最佳初始pH為7。全波段掃描結(jié)果顯示,NB染料經(jīng)過12h生物降解作用后,其發(fā)光基團得到較徹底降解。GC-MS測得NB染料生物降解中間產(chǎn)物有2,4-二硝基苯胺、2-氰基-4-硝基苯胺、對硝基苯胺等。(2)在好氧、厭氧、厭氧/好氧條件下,采用活性污泥法生物降解分散染料Rhodamine B,實驗結(jié)果表明在48h反應過后最大去除率為7.0%。(3)在好氧、厭氧、厭氧/好氧條件下,采用活性污泥法降解染料分散大紅S-BWFL。實驗結(jié)果表明分散大紅S-BWFL在厭氧條件下降解率最高,厭氧/好氧交替條件次之,好氧條件下降解率最低;隨著進水染料濃度的增加,微生物對染料的降解率逐漸下降,而添加易生物降解碳源可以促進分散大紅S-BWFL的生物降解;分散大紅S-BWFL降解最佳初始pH為8。全波段掃描結(jié)果顯示,分散大紅S-BWFL經(jīng)過12h生物降解作用后,其發(fā)光基團得到較徹底降解。GC-MS測得分散大紅S-BWFL生物降解中間產(chǎn)物有對硝基苯胺、鄰苯二甲酸單(2-乙基己基)酯和對硝基苯甲醚。(4)在好氧、厭氧、厭氧/好氧條件下,采用活性污泥法降解染料分散紅S-5BL。實驗結(jié)果表明分散紅S-5BL在厭氧條件下降解率最高,厭氧/好氧交替條件次之,好氧條件下降解率最低;隨著進水染料濃度的增加,微生物對染料的降解率逐漸下降,而添加易生物降解碳源可以促進分散紅S-5BL的生物降解率;分散紅S-5BL降解最佳初始pH為8。全波段掃描結(jié)果顯示,分散紅S-5BL經(jīng)過12h生物降解作用后,其發(fā)光基團得到較徹底降解。GC-MS測得分散紅S-5BL生物降解中間產(chǎn)物有2-氯-4-氨基苯胺和鄰苯二甲酸單(2-乙基己基)酯。
[Abstract]:With the wide application of polyester textiles, the variety and dosage of disperse dyes most commonly used in dyeing polyester fiber are increasing year by year. The composition of disperse dye wastewater is becoming more and more complex and the waste water quantity is increasing.At present, biological treatment is still the main method in dye wastewater treatment, and the biodegradation of disperse dye wastewater is an important problem in wastewater treatment.The degradation of four disperse dyes, Neocron Black-Rhodamine B, disperse reddish S-BWFLand disperse red S-5BL, was investigated under three different conditions: anaerobic, aerobic and anaerobic / aerobic alternations.The results of this study can provide a feasible support for the biodegradation of disperse dye wastewater, and also provide a basis for the possible degradation products of disperse dye wastewater under aerobic, anaerobic, anaerobic / aerobic conditions.The biodegradation characteristics of the disperse dye, Neocron, were studied by activated sludge method, and the biodegradation process of the dye was discussed.The results showed that the degradation rate of niobium dyes was the highest under aerobic conditions, followed by alternative anaerobic / aerobic conditions, and the lowest under anaerobic conditions, and the degradation rate of dyes gradually decreased with the increase of influent dye concentration.The optimum initial pH value of NB dye degradation was 7. 2%, while the addition of easily biodegradable carbon source could promote the degradation of NB dye.The results of full-band scanning showed that after 12 h biodegradation, the luminescent groups of NB dyes were completely degraded. GC-MS determined that the intermediate products of biodegradation of NB dyes were 2o 4-dinitroaniline 2-cyano-4-nitroaniline, p-nitroaniline, etc.) in aerobic condition.Under anaerobic, anaerobic / aerobic conditions, the biodegradation of disperse dye Rhodamine B by activated sludge was carried out. The experimental results showed that the maximum removal rate of Rhodamine B was 7. 0% after 48 h reaction) under aerobic, anaerobic, anaerobic / aerobic conditions.The dye disperse red S-BWFL was degraded by activated sludge process.The results showed that the degradation rate of disperse scarlet S-BWFL was the highest under anaerobic condition, followed by alternative anaerobic / aerobic condition, and the lowest under aerobic condition, and the degradation rate of dye decreased gradually with the increase of influent dye concentration.The addition of easily biodegradable carbon sources could promote the biodegradation of disperse reddish S-BWFL, and the optimum initial pH was 8.The results of full-band scanning showed that after 12 h biodegradation of disperse reddish S-BWFL, its luminescent group was completely degraded. GC-MS determined that the intermediate product of disperse reddish S-BWFL biodegradation was p-nitroaniline.Dye disperse red S-5BL was degraded by activated sludge method under aerobic, anaerobic, anaerobic / aerobic conditions.The results showed that the degradation rate of disperse red S-5BL was the highest in anaerobic condition, followed by alternative anaerobic / aerobic condition, and the lowest in aerobic condition, and the degradation rate of dye decreased gradually with the increase of influent dye concentration.The biodegradation rate of disperse red S-5BL was improved by adding easily biodegradable carbon source, and the optimum initial pH of disperse red S-5BL was 8.The results of full-band scanning showed that after 12 h biodegradation of disperse red S-5BL, its luminescent group was completely degraded. GC-MS determined that the intermediate products of disperse red S-5BL biodegradation were 2-chloro-4-aminoaniline and mono-2-ethylhexyl phthalate.
【學位授予單位】：東華大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：X791

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