污水處理外文翻譯---de型氧化溝生物脫氮除磷工藝

1、<p><b>　　外文資料Ⅱ</b></p><p>　　DE-oxidation ditch biological nitrogen</p><p>　　and phosphorus removal process</p><p>　　1、DE-oxidation ditch biological nitrogen removal

2、 process</p><p>　　Nitrogen is a plant growth essential nutrients, but if the chlorine content in water too high, it will produce eutrophication so that the dissolved oxygen content to reduce, the proliferati

3、on of algae growth, accelerate the aging process of natural water bodies. In addition to the nitrate form of chlorine is considered a cause of infant leukemia temporary high-speed railway on January 1 of the root causes

4、of hemoglobin. Therefore, drinking water sources will Liuren the oxidation ditch water is n</p><p>　　Oxidation Ditch biological nitrogen removal is the first by the self-support of aerobic microbes in the ae

5、robic state, the use of dissolved oxygen in the mixture through nitrification will be for the effect of nitrate oxide, and then from heterotrophic microorganisms in the state in the anti-anoxia The role of nitrifying bac

6、teria, the use of nitrates in the role nitrification oxygen to produce anti-nitrate nitrogen into the release of chlorine out.</p><p>　　Nitrification-as：</p><p>　　Denitrification-as：</p>

7、<p>　　DE-oxidation ditch the dechlorination role through a special operation mode, in turn create two Gounei nitrification and nitrification conditions. Nitrogen and purpose of reach. Operation to the following four

8、 stages of operation (Figure 1).</p><p>　　Stage A: Well distribution of the sewage ditch into the Ditch I, interim ditch running low brush, only to maintain the activated sludge mixture of suspended state; d

9、issolved oxygen concentration of less than 0.5 mg/l, in a state of hypoxia, so that the former An aerobic phase of the nitrate to raw sewage as carbon source for denitrification.At this point, I ditch behind the overflow

10、 weir open, muddy mixture into this two-person pool for precipitation separation, and in the ditch II to the high-s</p><p>　　Phase B: the distribution of sewage are still people well into the groove I,DitchI

11、, II maintained ditch on the stage of the anti-nitrification, nitrification state. But the water from the ditch I read the Amoy II, guarantee people into the ditch II of the sewage pollution in the organic ma

12、terial is fully degradable. The stage for the run-time 105 min.</p><p>　　Stage C: Well into the distribution of the sewage ditch II. At this point ditch II interim low brush then pushed into the flow of deni

13、trifying state. To the water. I ditch and high-speed transit brush aeration, nitrification. The stage for the running time 15 min.</p><p>　　Stage D: D stage of the operation and status similar to stage B, on

14、ly Ditch I, iI into the ditch, the water situation in the opposite. The stage of the running time for 105 min</p><p>　　Process in the course of the operation. Well distribution, Brush, overflow weir by the p

15、re-set time control operation. In addition, Brush also be installed in each groove of dissolved oxygen analyzer control.</p><p>　　Figure 1 Biological nitrogen removal opertation mode</p><p>　

16、　2、DE-oxidation ditch biological phosphorus removal process</p><p>　　Phosphorus is essential microbial metabolism of nutrients, microbial cells is composed of part, by ADP and adenosine triphosphate (ATP) of

17、 each other to provide energy to achieve conversion of synthesis.</p><p>　　Rely mainly on the removal of phosphorus-phosphate of energy exchange in the process of absorbing phosphorus, and polymerization in

18、the form of phosphorus in the body. Anaerobic state,These bacteria will be in polymerization of phosphorus to PO43--P in the form of a release in aerobic or oxygen sha state, the P-Han and respiration through the absorpt

19、ion of sewage in the PO43--P, a polymerization of phosphorus in the form of Synthesis of the cell.</p><p>　　DE-oxidation ditch the biological phosphorus removal is the basis of this mechanism, set up in the

20、 oxidation ditch before anaerobic pond, Thus forming anaerobic January 1 January 1 hypoxia aerobic processes (Figure 2), and created a conducive to the best of phosphorus operating conditions.</p><p>　　The s

21、ystem of anaerobic pond by the three ditches group. HRT for lh. Diving pool installed blender, sewage sludge and returning well-mixed.- P because of the need to completely anaerobic conditions can be fully in the polymer

22、ization of phosphorus released, if the pool NO3-,containing excessive, it will affect the efficiency of phosphorus, in the first Gounei contain NO3-，the Return to the use of sewage sludge as carbon source for a more thor

23、ough response to the denitrificationTo ensure that phos</p><p>　　Figure 2 Bilogical phosphours remonal process</p><p><b>　　中文譯文Ⅱ</b></p><p>　　DE型氧化溝生物脫氮除磷工藝</p>

24、<p>　　1、DE型氧化溝生物脫氮工藝 </p><p>　　氮是植物生長的一種必不可少的營養(yǎng)成分，但是如果水體中氯的含量過高，就會產(chǎn)生富營養(yǎng)化，使溶解氧含量降低，藻類生長泛濫，加速水體天然老化過程。另外，以硝酸鹽形式存在的氯被認為是引起嬰幼兒的一種暫時性白血病—高鐵血紅蛋白癥的根源。因此，對于將流人飲用水水源的氧化溝出水很有必要脫氮。</p><p>　　氧化溝生物脫氮是

25、首先由自養(yǎng)型好氧微生物在好氧狀態(tài)下，利用混合液中的溶解氧通過硝化反應(yīng)將氨氯氧化為硝酸鹽，再由異養(yǎng)微生物在缺氧狀態(tài)下在反硝化細菌的作用下，利用硝酸鹽中的氧產(chǎn)生反硝化作用將硝酸鹽中的氮轉(zhuǎn)化為氮氣釋放出去。 </p><p><b>　　硝化反應(yīng)式為： </b></p><p><b>　　反硝化反應(yīng)式為： </b></p><p&

26、gt;　　DE型氧化溝的脫氯作用是通過特殊的運行方式，在兩條溝內(nèi)交替創(chuàng)造硝化和反硝化反應(yīng)的條件。而達到脫氮目的。運行方式接以下四個階段運行</p><p><b>　　(如圖1 ) 。</b></p><p>　　階段A ：污水經(jīng)分配井進人溝I，溝中轉(zhuǎn)刷低速運行，僅保持活性污泥混合液的懸浮狀態(tài)；溶解氧濃度低于0.5mg/l,處于缺氧狀態(tài),從而使得經(jīng)前一好氧階段產(chǎn)生的硝

27、酸鹽以原污水為碳源進行反硝化反應(yīng)。此時，溝I后端的溢流堰打開，泥水混合液由此進人二沉池進行沉淀分離，而溝II中的轉(zhuǎn)刷進行高速曝氣，將前一階段進人該淘的污水在好氧狀態(tài)下(D0>2 mg/l)進行硝化反應(yīng)。該階段的運行時間為 15min。</p><p>　　階段B：污水仍經(jīng)分配井進人溝I，溝I、溝II均保持上階段的反硝化、硝化狀態(tài)。但水由溝I改為溝II，保證進人溝II的污水中有機污染物質(zhì)得到充分降解。該階段運

28、行時間105min。</p><p>　　階段C：污水經(jīng)分配井進入溝II。此時溝II中轉(zhuǎn)刷低遂推流進入反硝化狀態(tài),進行出水。而溝I中轉(zhuǎn)刷高速曝氣，進行硝化反應(yīng)。該階段運行時間為 15min。 </p><p>　　階段D：階段 D的運行狀態(tài)與階段 B相似，只是溝I、溝II進、出水情況相反。該階段的運行時間為105min。 </p><p>　　上述工藝運行過程中。

29、分配井、轉(zhuǎn)刷、溢流堰由預(yù)先設(shè)定的時間控制運行。另外，轉(zhuǎn)刷還受安裝在每條溝的溶解氧測定儀控制。</p><p>　　圖1 生物脫氮運行方式</p><p>　　2、DE型氧化溝生物除磷過程 </p><p>　　磷是微生物新陳代謝所必需的營養(yǎng)元素，既是微生物體細胞組成的一部分，又通過二磷酸腺苷(ADP)和三磷酸腺苷(ATP)的相互轉(zhuǎn)換提供能量來實現(xiàn)細胞合成。&l

30、t;/p><p>　　磷的去除主要依靠聚磷菌在能量交換過程中吸收磷，并以聚合磷的形式存在于體內(nèi)。在厭氧狀態(tài)下，這些細菌將體內(nèi)聚合磷以PO43-—P的形式釋放出來；在好氧或缺氧狀態(tài)下，聚磷菌又通過呼吸作用吸收污水中的PO43-—P，以聚臺磷的形式存在于體中進行細胞合成。 </p><p>　　DE 型氧化溝的生物除磷就是根據(jù)這個機理，在氧化溝前設(shè)置厭氧進水池，從而形成厭氧—缺氧—好氧的工藝流程

31、( 如圖2 ) ，創(chuàng)造了有利于生物除磷的最佳運行條件。</p><p>　　該系統(tǒng)中厭氧池由三個溝渠組成，水力停留時間為lh。池中安裝潛水攪拌器，使污水與回流污泥充分混合。因為聚磷菌必須在完全厭氧的條件下才能夠體內(nèi)的聚合磷充分釋放出來，如果池中 NO3-的含量過大，會影響除磷的效率，所以在第一條溝內(nèi)含有NO3-的回流污泥利用污水作碳源進行較徹底的脫硝反應(yīng)，從而保證磷在第二、三條淘內(nèi)得以充分釋放。污水經(jīng)分配井進人氧