废气净化主要是指针对工业场所产生的工业废气工业废气诸如粉尘颗粒物、烟气烟尘、异味气体、有毒有害其他进行治理的工作。

主要方技术：
    （1）稀释扩散法：将有臭味地气体通过烟囱排至大气，或用无臭空气稀释，降低恶臭物质浓度以减少臭味。
    （2）水吸收法：利用臭气中某些物质易溶于水的特性，使臭气成分直接与水接触，从而溶解于水达到脱臭目的。
    （3）曝气式活性污泥脱臭法：将恶臭物质以曝气形式分散到含活性污泥的混和液中，通过悬浮生长的微生物降解恶臭物质 适用范围广。
    （4）多介质催化氧化工艺：反应塔内装填特制的固态填料，填料内部复配多介质催化剂。当恶臭气体在引风机的作用下穿过填料层，与通过特制喷嘴呈发散雾状喷出的液相复配氧化剂在固相填料表面充分接触，并在多介质催化剂的催化作用下，恶臭气体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.