臭氧—陶瓷膜耦合系統在水產養(yǎng)殖循環(huán)水處理中的應用
發(fā)布時間：2018-11-21 10:14
【摘要】：催化臭氧氧化同陶瓷膜分離相耦合技術是一種新型、高效的深度廢水處理技術,它不僅能夠利用膜截留過程濃縮廢水中的有毒有害物質,而且還能利用催化臭氧氧化降解膜截留的污染物質。在催化臭氧氧化-陶瓷膜分離耦合技術中,高效、穩(wěn)定臭氧催化陶瓷分離膜的制備是關鍵環(huán)節(jié)之一。本研究旨在篩選出高效的臭氧催化劑,將其負載到陶瓷膜基底上,制備出高效穩(wěn)定的臭氧催化陶瓷膜,組合成催化臭氧氧化-陶瓷分離膜耦合水處理系統,并應用此系統對實際水產養(yǎng)殖循環(huán)水進行處理。初步建立起催化臭氧氧化-陶瓷分離膜耦合工藝處理實際水產養(yǎng)殖循環(huán)水的工藝方法,為實際水污染治理和資源化利用提供了一種可實用化的污水處理技術。具體研究內容如下：(1)運用不同的方法制備出不同的臭氧催化劑,比較各種催化劑對臭氧的催化氧化性能,篩選出一種最為有效的處理水中污染物的臭氧催化劑。研究發(fā)現,改變氧化鐵催化劑的形貌對催化臭氧分解的能力影響不大,去除硝基苯的效果也不佳；納米棒狀氧化錳催化臭氧分解的能力較強,但其降解實際印染廢水的效果卻不佳；摻雜錳元素鈦氧化物對草酸去除率最高,為63.8%,去除草酸的動力學常數絕對值為0.03436 K/min,分別是TiCoxOy、TiCexOy、TiFexOy、TiO2和不加催化劑的1.5、3.4、5.7、10.2和20.6倍。(2)用溶膠-凝膠法將摻雜錳元素的鈦氧化物成功負載到陶瓷膜基底上,制備出高效、穩(wěn)定的臭氧催化陶瓷分離膜。SEM和EDX圖譜表明,鈦錳氧化物不僅均勻的負載在陶瓷膜的表面,而且部分滲透到陶瓷膜內部；XRD圖譜顯示,制備的臭氧催化陶瓷膜由三部分構成：基底(Al2O3)、中間層(金紅石型TiO2)和催化層(金紅石型TiO2,未發(fā)現氧化錳的特征峰)；膜通量測試表明,Ti-Mn/TiO2/Al2O3 和 TiO2/Al2O3膜通量分別為269.6L/m2·h·bar 和 340.5 L/m2·h·bar。(3)單獨膜分離工藝、臭氧氧化-陶瓷分離膜耦合工藝和催化臭氧氧化-陶瓷分離膜耦合工藝對水產養(yǎng)殖廢水的處理效果表明,單獨膜分離工藝不能去除水產養(yǎng)殖廢水中的總氨氮、亞硝酸鹽和溶解性有機污染物,并會發(fā)生嚴重的膜通量下降現象;臭氧氧化-陶瓷膜分離耦合工藝和催化臭氧氧化-陶瓷分離膜耦合工藝對水產養(yǎng)殖廢水具有良好的處理效果,兩種處理工藝對懸浮物、總氨氮和亞硝酸去除率相近(出水中濁度≈0 NTU,總氨氮≤0.1 mg/L,亞硝酸≤0.005 mg/L),對CODMn的去除率分別為35.7%和52.1%。出水水質達到第二類海水水質標準,也滿足漁業(yè)水產養(yǎng)殖水質的標準。(4)將催化臭氧氧化-陶瓷膜分離工藝應用到實際水產養(yǎng)殖循環(huán)水處理中,長期運行結果顯示,此系統出水水質和水量均保持穩(wěn)定。初步建立起催化臭氧氧化-陶瓷膜分離耦合工藝處理實際水產養(yǎng)殖循環(huán)水的工藝方法,此耦合系統具有良好的應用前景。
[Abstract]:The coupling technology of catalytic ozone oxidation and ceramic membrane separation is a new and efficient advanced wastewater treatment technology. It can not only use membrane interception process to concentrate toxic and harmful substances in wastewater. Moreover, catalytic ozone oxidation can also be used to degrade the pollutants intercepted by the membrane. In the coupling technology of catalytic ozone oxidation and ceramic membrane separation, the preparation of efficient and stable ozone catalytic ceramic separation membrane is one of the key links. The purpose of this study was to screen out high efficient ozone catalyst, to load it on ceramic membrane substrate, to prepare high efficient and stable ozone catalytic ceramic membrane, and to combine it into a coupling water treatment system of catalytic ozone oxidation-ceramic separation membrane. The system is applied to the treatment of real aquaculture circulating water. The coupling process of catalytic ozone oxidation and ceramic separation membrane was established for the treatment of real aquaculture circulating water, which provided a practical sewage treatment technology for actual water pollution treatment and utilization. The specific research contents are as follows: (1) different ozone catalysts were prepared by different methods, and the catalytic oxidation performance of different catalysts was compared to select the most effective ozone catalyst for the treatment of pollutants in water. It was found that changing the morphology of ferric oxide catalyst had little effect on the catalytic ability of ozone decomposition and the removal of nitrobenzene was not good. Nano-rod-like manganese oxide can catalyze ozone decomposition, but it is not effective in the degradation of printing and dyeing wastewater. The removal rate of oxalic acid was 63.8%, and the absolute value of kinetic constant of oxalic acid removal was 0.03436 K / min, respectively, which was TiCoxOy,TiCexOy,TiFexOy,. TiO2 and 1.5N 3.4N 5.710. 2 and 20.6 times without catalyst. (2) the manganese doped titanium oxide was successfully loaded on the ceramic membrane substrate by sol-gel method, and the high efficiency was obtained. The stable ozone catalytic ceramic separation membrane. SEM and EDX spectra show that the titanomanganese oxide is not only loaded on the surface of the ceramic membrane, but also partially permeated into the ceramic membrane. The XRD spectra showed that the prepared ozone catalytic ceramic membrane was composed of three parts: substrate (Al2O3), intermediate layer (rutile type TiO2) and catalytic layer (rutile type TiO2, did not find the characteristic peak of manganese oxide). The membrane fluxes of Ti-Mn/TiO2/Al2O3 and TiO2/Al2O3 were 269.6L/m2 h bar and 340.5 L/m2 h bar. (3, respectively. The effects of ozone oxidation-ceramic separation membrane coupling process and catalytic ozonation-ceramic separation membrane coupling process on the treatment of aquaculture wastewater showed that the membrane separation process could not remove total ammonia nitrogen from aquaculture wastewater. Nitrite and dissolved organic pollutants, and serious membrane flux decline; The coupling process of ozone oxidation-ceramic membrane separation and catalytic ozonation-ceramic separation membrane has a good effect on the treatment of aquaculture wastewater. The removal rates of total ammonia nitrogen and nitrite were similar (turbidity 鈮，
本文編號：2346672
[Abstract]:The coupling technology of catalytic ozone oxidation and ceramic membrane separation is a new and efficient advanced wastewater treatment technology. It can not only use membrane interception process to concentrate toxic and harmful substances in wastewater. Moreover, catalytic ozone oxidation can also be used to degrade the pollutants intercepted by the membrane. In the coupling technology of catalytic ozone oxidation and ceramic membrane separation, the preparation of efficient and stable ozone catalytic ceramic separation membrane is one of the key links. The purpose of this study was to screen out high efficient ozone catalyst, to load it on ceramic membrane substrate, to prepare high efficient and stable ozone catalytic ceramic membrane, and to combine it into a coupling water treatment system of catalytic ozone oxidation-ceramic separation membrane. The system is applied to the treatment of real aquaculture circulating water. The coupling process of catalytic ozone oxidation and ceramic separation membrane was established for the treatment of real aquaculture circulating water, which provided a practical sewage treatment technology for actual water pollution treatment and utilization. The specific research contents are as follows: (1) different ozone catalysts were prepared by different methods, and the catalytic oxidation performance of different catalysts was compared to select the most effective ozone catalyst for the treatment of pollutants in water. It was found that changing the morphology of ferric oxide catalyst had little effect on the catalytic ability of ozone decomposition and the removal of nitrobenzene was not good. Nano-rod-like manganese oxide can catalyze ozone decomposition, but it is not effective in the degradation of printing and dyeing wastewater. The removal rate of oxalic acid was 63.8%, and the absolute value of kinetic constant of oxalic acid removal was 0.03436 K / min, respectively, which was TiCoxOy,TiCexOy,TiFexOy,. TiO2 and 1.5N 3.4N 5.710. 2 and 20.6 times without catalyst. (2) the manganese doped titanium oxide was successfully loaded on the ceramic membrane substrate by sol-gel method, and the high efficiency was obtained. The stable ozone catalytic ceramic separation membrane. SEM and EDX spectra show that the titanomanganese oxide is not only loaded on the surface of the ceramic membrane, but also partially permeated into the ceramic membrane. The XRD spectra showed that the prepared ozone catalytic ceramic membrane was composed of three parts: substrate (Al2O3), intermediate layer (rutile type TiO2) and catalytic layer (rutile type TiO2, did not find the characteristic peak of manganese oxide). The membrane fluxes of Ti-Mn/TiO2/Al2O3 and TiO2/Al2O3 were 269.6L/m2 h bar and 340.5 L/m2 h bar. (3, respectively. The effects of ozone oxidation-ceramic separation membrane coupling process and catalytic ozonation-ceramic separation membrane coupling process on the treatment of aquaculture wastewater showed that the membrane separation process could not remove total ammonia nitrogen from aquaculture wastewater. Nitrite and dissolved organic pollutants, and serious membrane flux decline; The coupling process of ozone oxidation-ceramic membrane separation and catalytic ozonation-ceramic separation membrane has a good effect on the treatment of aquaculture wastewater. The removal rates of total ammonia nitrogen and nitrite were similar (turbidity 鈮，
本文編號：2346672
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