生物脫硫是工業(yè)行業(yè)中 常用的脫硫技術(shù)。生物脫硫又稱生物催化脫硫(簡稱BDS)，生物脫硫(BDS)是利用微生物或它所含的酶催化含硫化合物(H2S、有機(jī)硫)、將其所含的硫積放出來(轉(zhuǎn)化為S0或單質(zhì)S)的過程。
Biological desulfurization is a commonly used desulfurization technology in the industrial industry. Biological desulfurization, also known as biocatalytic desulfurization (BDS), is the process of using microorganisms or their enzymes to catalyze sulfur-containing compounds (H2S, organic sulfur) and release the sulfur they contain (converting it into S0 or elemental S).
0105.13
one hundred and five point one three
機(jī)理
mechanism
生物法凈化惡臭氣體的雙膜—生物膜理論，此為生物法凈化氣體可分為三個步驟：
The dual membrane biofilm theory for biological purification of odorous gases can be divided into three steps:
溶解
dissolution
廢氣與水或固體表面的水膜接觸污染物溶于水中或?yàn)橐合嘀械姆肿踊螂x子，即惡臭物質(zhì)由氣相轉(zhuǎn)移到液相，此步為物理過程亨利定律。
The contact between exhaust gas and water or the water film on the surface of a solid. Pollutants dissolve in water or are molecules or ions in the liquid phase, that is, the transfer of odorous substances from the gas phase to the liquid phase. This step is the physical process according to Henry's law.
吸附吸收
Adsorption absorption
水溶液中惡臭成分被微生物吸附、吸收。從水中轉(zhuǎn)移至微生物體內(nèi)，作為吸收劑的水被再生復(fù)原，再去溶解新的惡臭成分。
The odor components in aqueous solutions are adsorbed and absorbed by microorganisms. Transferred from water to microorganisms, the water used as an absorbent is regenerated and restored before dissolving new odorous components.
生物降解
Biodegradation
進(jìn)入微生物細(xì)胞的惡臭成分作為微生物生命活動的能源或養(yǎng)分被分解和利用，使污染物得以去除。
The odor components entering microbial cells are decomposed and utilized as energy or nutrients for microbial life activities, enabling the removal of pollutants.
進(jìn)入微生物細(xì)胞內(nèi)的有機(jī)物在細(xì)胞內(nèi)酶作用下氧化分解，同時進(jìn)行合成代謝產(chǎn)生新的微生物細(xì)胞。
Organic matter entering microbial cells is oxidized and decomposed by intracellular enzymes, while undergoing synthetic metabolism to produce new microbial cells.
用雙膜—生物膜理論解釋生物法處理含硫廢氣時也有與以上相似的三個步驟：
There are three similar steps to explain the biological treatment of sulfur-containing waste gas using the dual membrane biofilm theory:
含硫氣體與水或固體表面的水膜接觸，氣體中的硫溶于水成為液相中的分子或離子，硫從氣相轉(zhuǎn)移到液相，該過程為物理過程，遵循亨利定律。
Sulfur-containing gases come into contact with water or a water film on the surface of a solid. The sulfur in the gas dissolves in water and becomes a molecule or ion in the liquid phase. The transfer of sulfur from the gas phase to the liquid phase is a physical process that follows Henry's law.
水溶液中的硫在濃度差的推動下擴(kuò)散到生物膜內(nèi)被微生物吸附、吸收，硫從水中轉(zhuǎn)移到微生物體內(nèi)，作為微生物的營養(yǎng)物質(zhì)和能源被分解利用。
The sulfur in the aqueous solution diffuses into the biofilm under the promotion of concentration difference, and is adsorbed and absorbed by microorganisms. The sulfur is transferred from the water to the microbial body, and is decomposed and utilized as a nutrient and energy source for microorganisms.
0105.14
one hundred and five point one four
方法
method
生物脫硫技術(shù)包括生物過濾法、生物吸附法和生物滴濾法，三種系統(tǒng)均屬開放系統(tǒng)，其微生物種群隨環(huán)境改變而變化。在生物脫硫過程中，氧化態(tài)的含硫污染物必須先經(jīng)生物還原作用生成硫化物或H2S然后再經(jīng)生物氧化過程生成單質(zhì)硫，才能去除。在大多數(shù)生物反應(yīng)器中，微生物種類以細(xì)菌為主，真菌為次，極少有酵母菌。常用的細(xì)菌是硫桿菌屬的氧化亞鐵硫桿菌，脫氮硫桿菌及排硫桿菌。最成功的代表是氧化亞鐵硫桿菌，其生長的最佳pH值為2.0～2.2。
Biological desulfurization technology includes biological filtration, biological adsorption, and biological drip filtration, all of which belong to open systems, and their microbial populations change with environmental changes. In the process of biological desulfurization, oxidized sulfur-containing pollutants must first undergo biological reduction to generate sulfides or H2S, and then undergo biological oxidation to generate elemental sulfur in order to be removed. In most bioreactors, the microbial species are mainly bacteria, followed by fungi, and there are very few yeast. The commonly used bacteria are Thiobacillus ferrooxidans, Thiobacillus denitrifying, and Thiobacillus excreting. The most successful representative is Thiobacillus ferrooxidans, with an optimal pH value of 2.0-2.2 for its growth.
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2023-12-15
