本文選題：微藻 + 氮氧化物�。� 參考：《昆明理工大學(xué)》2017年碩士論文

【摘要】：微藻在生長過程中可利用燃煤煙氣中的CO2作為碳源,從而去除燃煤煙氣中CO2,減少溫室氣體的排放。氮氧化物(NOx)是燃煤煙氣中另外一種污染物,它有毒性,能抑制藻類生長。因此,本研究的目的是確定不同藻類對氮氧化物(NOx)的耐受性及藻類對高濃度氮氧化物(NOx)環(huán)境的適應(yīng)性,從而利用微藻去除工業(yè)廢氣中氮氧化物(NOx)。為了確保對微藻篩選和馴化過程的效率,開發(fā)了一種新的微泡誘導(dǎo)藻類篩選系統(tǒng)。研究結(jié)果表明,對比于常規(guī)的錐形瓶和傳統(tǒng)反應(yīng)器,該系統(tǒng)的混合、循環(huán)和質(zhì)量傳遞大大增強(qiáng),微泡誘導(dǎo)系統(tǒng)的KLa值是傳統(tǒng)反應(yīng)器的4倍。該研究的結(jié)果還表明,應(yīng)用微泡誘導(dǎo)系統(tǒng)可以增加藻類生長速率,比傳統(tǒng)反應(yīng)器中的相對生長速率約高20%。研究篩選系統(tǒng)發(fā)現(xiàn),在1.22m/s的氣體流速下,藻類的生長速率最高。研究篩選了 12種藻株,即小球藻(Chlorella protothecoides)、蛋白核小球藻(Chlorella pyrenoidosa)、普通小球藻(Chlorella vulgaris)、斜生柵藻(Scenedesmus obliquus)、萊茵衣藻(Chlamydomas reinhardtii)、小球藻淡水(Chlorella sp.)、微綠球藻(Nannochloropsis oculata)、微綠球藻淡水(Nannochloropsis oculata)、鹽藻(Dunaliella sp.)、小球藻F5(Chlorella sp.)滇池草海雜藻、滇池排污入口雜藻。研究發(fā)現(xiàn)氮氧化物(NOx)濃度為12870mg/m3時(shí),幾乎對所有藻株都有抑制作用,但小球藻(Chlorella protothecoides)、蛋白核小球藻(Chlorella pyrenoidosa)、普通小球藻(Chlorella vulgaris)、斜生柵藻(Scenedesmus obliquus)、小球藻淡水(Chlorellasp.)、鹽藻(Dunaliella sp.)6種微藻對氮氧化物(NOx)耐受性比較強(qiáng),進(jìn)一步研究小球藻(Chlorella protothecoides)、蛋白核小球藻(Chlorella pyrenoidosa)、普通小球藻(Chlorella vulgaris)、斜生柵藻(Scenedesmus obliuus)對氮氧化物(NOx)的適應(yīng)能力。通過在不同氮氧化物(NOx)濃度(9900 mg/m3,12870mg/m3)下測量藻類生物質(zhì)的生長速率,研究微藻對氮氧化物(NOx)的適應(yīng)能力。研究發(fā)現(xiàn),此氮氧化物(NOx)濃度對4種微藻都有抑制作用,但通過兩次馴化,都表現(xiàn)出比較強(qiáng)的適應(yīng)能力,尤其是小球藻(Chlorella protothecoides)、斜生柵藻(Scenedesmus obliquus)的適應(yīng)能力顯著增長。還通過NMR和GC-MS研究了氮氧化物(NOx)對微藻脂質(zhì)生產(chǎn)的影響,并在本論文中進(jìn)行了討論。
[Abstract]:In the process of growth, microalgae can use CO2 from coal-fired flue gas as carbon source to remove CO2 from coal-fired flue gas and reduce greenhouse gas emission. Nitric oxide (NOX) is another pollutant in coal-fired flue gas, which is toxic and can inhibit algae growth. Therefore, the purpose of this study is to determine the tolerance of different algae to nitric oxide (no _ x) and the adaptability of algae to the environment of high concentration of no _ x, so as to remove no _ x _ XO _ (2) from industrial waste gas by microalgae. In order to ensure the efficiency of microalgae screening and acclimation, a new microbubble induced algal screening system was developed. The results show that compared with the conventional conical bottle and conventional reactor, the mixing, circulation and mass transfer of the system are greatly enhanced, and the KLa value of the microbubble induction system is 4 times that of the traditional reactor. The results also show that the microbubble induction system can increase the growth rate of algae, which is about 20% higher than that in the traditional reactor. The screening system showed that the algae growth rate was the highest at the gas flow rate of 1.22m/s. Twelve species of algae, Chlorella protoidesus, Chlorella pyrenoidosaer, Chlorella vulgaris, Scenedesmus obliquusa, Chlamydomas reinhardtiiana, Chlorella sp., Nannochloropsis oculatataa, Dunaliella sp., F5(Chlorella sp., Chlorella sp., Nannochloropsis oculataa, Dunaliella sp., F5(Chlorella sp.) Dianchi Caohai miscellaneous algae, Dianchi sewage import miscellaneous algae. It was found that when the concentration of no _ x was 12870mg/m3, it could inhibit almost all algae strains. However, Chlorella protothecoidesus, Chlorella pyrenoidosaer, Chlorella vulgaris, Scenedesmus obliquusa, Chlorellasp.and Dunaliella sp.)6 have stronger tolerance to nitrogen oxides. The adaptability of Chlorella protothecoidesus, Chlopyrenoidosae, Chlorella vulgaris, Scenedesmus obliuusto no _ x) was further studied. The growth rate of algae biomass was measured at 9900 mg / m ~ (3) N _ (2) O _ (x) concentration to study the adaptability of microalgae to nitric oxide (no _ (x). It was found that the concentration of no _ x inhibited the four species of microalgae, but the adaptation ability of Chlorella protothecoideschus and Scenedesmus obliquus increased significantly after two acclimation. The effects of no _ x on lipid production of microalgae were studied by NMR and GC-MS, and discussed in this paper.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：X701;X173

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本文編號：1910813