Views: 4 Author: Site Editor Publish Time: 2022-03-30 Origin: Site
The Ministry of ecology and environment issued the notice on accelerating the solution of the current prominent problems in the treatment of volatile organic compounds (Exposure Draft) on its official website, proposing that the investigation and remediation of the current prominent problems of VOCs emission will be carried out, and the investigation work will be completed by the end of August. The petrochemical industry is one of the key points of remediation.
In addition to treating organic matter, the petrochemical industry often produces some wastewater containing strong acid, strong alkali or strong corrosive particles. For the treatment of this kind of wastewater, organic membrane is often incompetent, and inorganic ceramic membrane has unique advantages in the treatment of this kind of wastewater because of its excellent chemical stability. The fine TiO2 particles were recovered from hydrochloric acid solution with chromium oxide ceramic membrane and washed with deionized water to remove acid radical in the product. After treatment, the conductivity of washing water decreased from 200ms / cm to 0.5ms/cm.
The experiment shows that better separation effect can be obtained by treating acid wastewater with alumina microfiltration ceramic membrane. The experimental study on the treatment of waste acid and wastewater produced in the production of titanium dioxide by sulfuric acid method with Al2O3 ceramic membrane shows that the treatment of such waste acid and wastewater with ceramic membrane device has the outstanding advantages of stable performance, easy regeneration and low operation cost, and has obvious social and economic benefits. The average pore diameter of coke powder in coking wastewater is 0.2um. The removal rate of coke powder is 95%. Gas top liquid recoil is conducive to delaying membrane fouling. Cleaning with surfactant and acid solution can restore membrane flux quickly and have good stability.
Nanomem is committed to providing users with integrated membrane technology solutions including water treatment and fluid separation. Nanomem membrane products are widely used in electric power, petrochemical industry, medicine, food and beverage, biopharmaceutical, steel, textile, municipal and environmental protection. They play an important role in seawater desalination, industrial pure water, electronic grade ultra pure water, reclaimed water reuse, biopharmaceutical and food industry separation and concentration process.