How do pharmaceutical intermediate suppliers handle hazardous substances?

The treatment of harmful substances generated during the production process of pharmaceutical intermediates requires multi-stage processes such as pretreatment, biochemical treatment, and deep treatment to achieve standard emissions. The specific methods are as follows:
pre-processing
Using iron carbon microelectrolysis combined with Fenton oxidation method, micro batteries are formed from iron carbon materials to decompose organic matter in wastewater. The generated ferrous ions catalyze hydrogen peroxide to produce hydroxyl radicals, rapidly oxidizing and decomposing pollutants. This method has a significant removal effect on high concentration organic matter and can reduce subsequent processing costs.  ‌
Biochemical treatment stage
Recommended anaerobic+aerobic combination process:
Anaerobic stage: UASB or EGSB reactors are used to convert large organic molecules into small molecules through microbial action, improving the biodegradability of wastewater.  ‌
Aerobic stage: Activated sludge process or membrane bioreactor (MBR) is used to further decompose small molecule organic matter into carbon dioxide and water. MBR technology can achieve efficient solid-liquid separation and improve effluent quality.  ‌
Deep processing stage
Using a combination process of hydrolysis acidification, UASB, and contact oxidation:
Hydrolysis acidification converts large molecule pollutants into small molecules, reducing toxicity;
UASB reactor enhances organic matter degradation;
The contact oxidation method ultimately achieves complete decomposition of organic matter.  ‌
Other processing techniques
Physical method: precipitation, filtration to remove suspended solids;
Chemical method: Neutralization and oxidation treatment of heavy metals and salts;
Biological method: The drip filter can treat low concentration organic matter with a removal rate of up to 90%.  ‌
For high salinity wastewater, the pH is adjusted to above 11 using the blow off method, and ammonia nitrogen is released through aeration.  ‌