基于生物硫循環(huán)的生物脫硫方法的基本原理是：，在硫化物氧化細(xì)菌的催化作用下，硫化物被生物氧化成單質(zhì)硫并可以回收利用，而在含硫化物的廢水中，SOB氧化和硫化的物理機(jī)理如下：
The basic principle of biological desulfurization method based on biological sulfur cycle is as follows: firstly, under the catalysis of sulfide oxidizing bacteria, sulfide is biologically oxidized to elemental sulfur and can be recycled. In sulfide containing wastewater, the physical mechanism of sob oxidation and sulfide is as follows:
從以上反應(yīng)式可以看出，硫化物的SOB氧化過程分為兩個(gè)步驟，初始反應(yīng)較快，硫化物將釋放兩個(gè)電子，產(chǎn)生的元素硫聚集在細(xì)胞外，這些微小的顆粒涂有一層生物聚合物。在第二步中，反應(yīng)緩慢，并且更初生成的硫被進(jìn)一步氧化形成亞硫酸鹽或硫酸鹽。對于反應(yīng)器，為了避免第二步驟中的反應(yīng)，必須控制溶解的氧和硫化物的負(fù)載。
It can be seen from the above reaction formula that the process of sulfur sulfide's sob oxidation can be divided into two steps. The initial reaction is fast. The sulfide will release two electrons, and the elemental sulfur produced will accumulate outside the cell. These tiny particles are coated with a layer of biopolymer. In the second step, the reaction is slow and the initial sulfur is further oxidized to form sulfite or sulfate. For the reactor, in order to avoid the reaction in the second step, the loading of dissolved oxygen and sulfide must be controlled.
在硫酸鹽還原細(xì)菌（SRB）的作用下，廢水中過度氧化的硫酸根（SO0 :)被還原為硫化物（包括H2S，S2和HS），其表示為：
Under the action of sulfate reducing bacteria (SRB), the over oxidized sulfate (SO0:) in wastewater is reduced to sulfide (including H2S, S2 and HS)
然后，使用硫化物氧化細(xì)菌（SOB）將硫化物氧化成元素硫，然后循環(huán)使用。
The sulfide is then oxidized to elemental sulfur by sulfide oxidizing bacteria (SOB) and recycled.
生物脫硫技術(shù)改變了傳統(tǒng)的理論極限。硫化物氧化菌與硫酸鹽還原菌結(jié)合處理含硫廢液的理論已經(jīng)逐漸發(fā)展。因?yàn)榱蚧镅趸?xì)菌和硫酸鹽還原細(xì)菌易于培養(yǎng)并且具有高活性。好氧和厭氧反應(yīng)器使工程應(yīng)用成為可能。
Biological desulfurization technology has changed the traditional theoretical limit. The theory of sulfide oxidizing bacteria combined with sulfate reducing bacteria has been developed gradually. Because sulfide oxidizing bacteria and sulfate reducing bacteria are easy to cultivate and have high activity. Aerobic and anaerobic reactors make engineering application possible.
生物脫硫在生物脫硫技術(shù)中作為生產(chǎn)的催化劑起著非常重要的作用。根據(jù)上述生物脫硫原理，可以知道含硫廢堿溶液的生物脫硫一般包括氧化反應(yīng)和還原反應(yīng)兩個(gè)階段，分別由硫化物氧化菌和硫酸鹽還原菌組成。
Biological desulfurization plays a very important role as a catalyst in the production of biological desulfurization technology. According to the above-mentioned biological desulfurization principle, it can be known that the biological desulfurization of sulfur-containing waste alkali solution generally includes two stages: oxidation reaction and reduction reaction, which are composed of sulfide oxidizing bacteria and sulfate reducing bacteria respectively.
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2020-07-06
