工业污水COD降低时的处理(lǐ)方式
工业污水特点
常用(yòng)工业废水处理(lǐ)方法
铁屑浸没在含大量電(diàn)解质的废水中时,形成无数个微小(xiǎo)的原電(diàn)池,在铁屑中加入焦炭后,铁屑与焦炭粒接触进一步形成大原電(diàn)池,使铁屑在受到微原電(diàn)池腐蚀的基础上,又(yòu)受到大原電(diàn)池的腐蚀,从而加快了電(diàn)化學(xué)反应的进行。
近年来,人们将紫外光、可(kě)见光等引入Fenton體(tǐ)系,并研究采用(yòng)其他(tā)过渡金属替代Fe2+,这些方法可(kě)显著增强Fenton试剂对有(yǒu)机物(wù)的氧化降解能(néng)力,减少Fenton试剂的用(yòng)量,降低处理(lǐ)成本,统称為(wèi)类Fenton反应。
為(wèi)此,近年来发展了旨在提高臭氧氧化效率的相关组合技术,其中UV/O3、H2O2/O3、UV/H2O2/O3等组合方式不仅可(kě)提高氧化速率和效率,而且能(néng)够氧化臭氧单独作用(yòng)时难以氧化降解的有(yǒu)机物(wù)。由于臭氧在水中的溶解度较低,且臭氧产生效率低、耗能(néng)大,因此增大臭氧在水中的溶解度、提高臭氧的利用(yòng)率、研制高效低能(néng)耗的臭氧发生装置成為(wèi)研究的主要方向。
SCWO反应速率快、停留时间短;氧化效率高,大部分(fēn)有(yǒu)机物(wù)处理(lǐ)率可(kě)达99%以上;反应器结构简单,设备體(tǐ)积小(xiǎo);处理(lǐ)范围广,不仅可(kě)以用(yòng)于各种有(yǒu)毒物(wù)质、废水、废物(wù)的处理(lǐ),还可(kě)以用(yòng)于分(fēn)解有(yǒu)机化合物(wù);不需外界供热,处理(lǐ)成本低;选择性好,通过调节温度与压力,可(kě)以改变水的密度、粘度、扩散系数等物(wù)化特性,从而改变其对有(yǒu)机物(wù)的溶解性能(néng),达到选择性地控制反应产物(wù)的目的。
湿式空气(催化)氧化法可(kě)应用(yòng)于城市污泥和丙烯腈、焦化、印染等工业废水及含酚、氯烃、有(yǒu)机磷、有(yǒu)机硫化合物(wù)的农药废水的处理(lǐ)。
Recommended Posts
-
In recent years, the hygienic condition of dental unit waterline (DUWL) has gradually received attention in China. At the same time, many local standards have been introduced. For example, Beijing issued "DB11/T 1703- 2019 Technical Specifications for Waterway Disinfection of Oral Comprehensive Treatment Units" on December 25th, 2019, while Zhejiang Province issued "DB33/T 2307-2021 Technical Specifications for Cleaning and Disinfection of Dental Waterway Systems" on January 29, 2021. In fact, various countries in the world have begun to pay attention to issues related to waterway pollution in dental treatment units much earlier, and have made relevant specifications. This article summarizes the standards of various countries in this regard as follows: Foreign standards related to the waterway of dental treatment units In 1996, the American De...
comment