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廢氣凈化主要是指針對工業場所產生的工業廢氣工業廢氣諸如粉塵顆粒物、煙氣煙塵、異味氣體、有毒有害其他進行治理的工作。
主要方技術：
（1）稀釋擴散法：將有臭味地氣體通過煙囪排至大氣，或用無臭空氣稀釋，降低惡臭物質濃度以減少臭味。
（2）水吸收法：利用臭氣中某些物質易溶于水的特性，使臭氣成分直接與水接觸，從而溶解于水達到脫臭目的。
（3）曝氣式活性污泥脫臭法：將惡臭物質以曝氣形式分散到含活性污泥的混和液中，通過懸浮生長的微生物降解惡臭物質 適用范圍廣。
（4）多介質催化氧化工藝：反應塔內裝填特制的固態填料，填料內部復配多介質催化劑。當惡臭氣體在引風機的作用下穿過填料層，與通過特制噴嘴呈發散霧狀噴出的液相復配氧化劑在固相填料表面充分接觸，并在多介質催化劑的催化作用下，惡臭氣體中的污染因子被充分分解。
Waste gas purification is mainly a pointer to the industrial sites of industrial waste gas industrial gases such as dust particles, smoke dust, smell gas, toxic or harmful to other management work.
Mainly technology:
(1) Dilution diffusion method: there will be a stench gas through the chimney to the atmosphere, or with no smelly air dilution, lower foul-smelling substances concentration to reduce the odor.
(2) Water absorption method: using the stench of certain substances is easily soluble in water, make the odor composition is direct contact with water, deodorization and dissolves in water to achieve.
(3) Activated sludge aeration type deodorization method: scatter in the form of aeration foul-smelling substances into containing activated sludge mixed liquid, by suspended growth microbial degradation of foul-smelling substances Wide range of application.
(4) Medium catalytic oxidation process, reaction tower fill the special solid packing, packing internal catalyst compound with multiple media.When the stench gas under the action of induced draft fan through the packing layer, and through special spread a mist nozzle of liquid compound oxidant in good contact with solid filler surface, and in many medium under the action of catalyst, the stench pollution factor in the gas are fully decomposed.