需要金幣： 1000 個(gè)金幣 |
資料包括：完整論文 |  |
 |
| 轉(zhuǎn)換比率：金額 X 10=金幣數(shù)量， 例100元=1000金幣 | 論文字?jǐn)?shù)：24607 |  | |
| 折扣與優(yōu)惠：團(tuán)購最低可5折優(yōu)惠 - 了解詳情 | 論文格式：Word格式(*.doc) |  |
摘要:人類利用微生物處理各種污染物已有100多年的歷史。目前，隨著污水排放標(biāo)準(zhǔn)的提高，對廢水生物脫氮技術(shù)的提出了更高要求。短程反硝化生物脫氮高效低耗，縮短反應(yīng)時(shí)間，成為近年來研究的熱點(diǎn)并且逐漸得到應(yīng)用。20世紀(jì)90年代后，短程硝化一反硝化工藝的研究再次進(jìn)入高潮，基于此理論開發(fā)出來具有代表性的是由荷蘭Delft科技大學(xué)開發(fā)出的SHARON工藝其基本原理是短程硝化反硝化，即將氨氮氧化控制在亞硝化階段，然后進(jìn)行反硝化該工藝使硝化系統(tǒng)中亞硝酸鹽的積累可接近100%。該工藝已經(jīng)在荷蘭兩座廢水生物脫氮處理廠運(yùn)用，證明了短程硝化反硝化對生物脫氮的可行性。 本研究在總結(jié)前人研究成果基礎(chǔ)上，開展下列實(shí)驗(yàn)研究：對短程反硝化細(xì)菌進(jìn)行紫外線、氯化鋰誘變及菌種篩選及擴(kuò)大化培養(yǎng)；采用海藻酸鈉、聚乙烯醇及二者聯(lián)合固定化短程反硝化細(xì)菌及菌種性能測定；不同碳源下短程反硝化特性研究；對技術(shù)應(yīng)用現(xiàn)狀及前景進(jìn)行總結(jié)分析。采用了細(xì)胞固定化技術(shù)，利用海藻酸鈉和氯化鈣固定化亞硝化細(xì)菌，探討了短程反硝化細(xì)菌富集的方法、固定化培養(yǎng)液的組成、海藻酸鈉和氯化鈣濃度對固定化細(xì)胞的影響。經(jīng)過兩個(gè)多月的實(shí)驗(yàn)，發(fā)現(xiàn)利用微生物進(jìn)行脫氮有一定的效果。 關(guān)鍵詞：短程反硝化，細(xì)菌篩選，不同碳源，生物脫氮
Abstract:Human use of microbial treatment of various pollutants has been 100 years of history.At present, with the sewage discharge standards of wastewater, biological nitrogen removal technology has put forward higher requirements. Shortcut nitrification-denitrification biological nitrogen removal with high efficiency and low energy consumption, short reaction time, become a research hotspot in recent years and been applied gradually. Nineteen ninties, short-cut nitrification and denitrification process of a once again into the climax, the theory developed is based on the representation is made by SHARON process Delft Holland science and Technology University developed its basic principle is the shortcut nitrification and denitrification, ammonia oxidation to nitrite under the control of the stage, and then the process of denitrification of nitrite nitrification system accumulation may be close to 100%. The process has been in Holland two biological nitrogen removal from wastewater using processing factory, proved the feasibility of short-cut nitrification and denitrification in biological. This study based on the results of previous studies, carried out the following experiments: ultraviolet radiation, to the short range of denitrifying bacteria LiCl mutagenesis and screening and enlargement of culture; with sodium alginate, polyvinyl alcohol and two joint immobilization of denitrifying bacteria and fungus performance was measured under different carbon sources; denitrification characteristics of research; analysis on application status and prospect. The immobilized cell technology, the immobilized by sodium alginate and calcium chloride nitrite bacteria, discusses the method of denitrifying bacteria, enrichment of the immobilized culture influence, sodium alginate and calcium chloride solution concentration of immobilized cells. After more than two months of the experiment, found that the use of microbial nitrogen have a certain effect. Key words:Short-cut denitrification Bacteria screening Different carbon sources biological removal of nitrogen
|
