隨著我國對可再生能源的開發(fā)和應(yīng)用的不時深化開展, 應(yīng)用畜禽糞便厭氧發(fā)酵產(chǎn)沼氣是一種十分有前景的能源應(yīng)用途徑，但所產(chǎn)生的沼氣中都含有H2S氣體，由于它是一種腐蝕性良好的化合物，所以沼氣脫硫是沼氣應(yīng)用的關(guān)鍵環(huán)節(jié)。
With the development and application of renewable energy in China, anaerobic fermentation of livestock and poultry manure to produce biogas is a very promising way of energy application. However, the biogas generated contains H2S gas. As it is a highly corrosive compound, biogas desulfurization is the key link of biogas application.
目前沼氣脫硫的辦法有兩大類，即物理化學(xué)法和生物法。物理化學(xué)法包括干法脫硫和濕法脫硫，已被普遍地應(yīng)用且積聚了豐厚的經(jīng)歷，但該辦法存在運轉(zhuǎn)費用高、投資大、產(chǎn)生二次污染等缺陷；而生物法以不需催化劑和氧化劑、不需處置化學(xué)污泥、少污染、低能耗、率、可回收單質(zhì)硫等優(yōu)點，惹起了人們的普遍關(guān)注。生物脫硫的安裝主要由生物脫硫塔和曝氣水箱構(gòu)成，從厭氧罐內(nèi)導(dǎo)出的沼氣由脫硫塔底部進(jìn)入，脫硫循環(huán)水由泵打入脫硫塔頂，兩者在塔內(nèi)逆向接觸反響，且塔內(nèi)充有填料以供脫硫菌附著生長，同時也利于氣水平均散布以充沛接觸。生物脫硫分為3個階段 :
At present, there are two kinds of desulfurization methods for biogas, namely physical chemical method and biological method. Physicochemical methods, including dry desulfurization and wet desulfurization, have been widely used and accumulated rich experience, but they have some shortcomings such as high operating costs, large investment and secondary pollution. Biological methods have attracted widespread attention for their advantages of no catalyst and oxidant, no need to dispose of chemical sludge, less pollution, low energy consumption, high efficiency and recoverable elemental sulfur. 。 The installation of biological desulfurization is mainly composed of biological desulfurization tower and aeration tank. The biogas derived from anaerobic tank enters from the bottom of the desulfurization tower, and the circulating water of desulfurization is pumped into the top of the desulfurization tower. Both of them are in reverse contact and react in the tower, and the tower is filled with fillers for the attachment and growth of desulfurization bacteria, which is also conducive to the full contact of the gas level. Biological desulfurization can be divided into three stages:
1.H2S 氣體的溶解過程，即由氣相轉(zhuǎn)化為液相；
1. The dissolution process of H2S gas, i.e. from gas phase to liquid phase;
2.溶解后的H2S被微生物吸收，轉(zhuǎn)移至微生物的體內(nèi)；
2. The dissolved H2S is absorbed by microorganisms and transferred to microorganisms.
3.進(jìn)入微生物細(xì)胞內(nèi)的H2S作為營養(yǎng)物被微生物合成、轉(zhuǎn)化和應(yīng)用，從而到達(dá)去除H2S的目的。
3. H2S entering microbial cells is synthesized, transformed and applied by microorganisms as nutrients to remove H2S.
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2019-03-20
