Industrial production of chemicals, including dye intermediates like 2,2',5,5'-Tetrachlorobenzidine (TCB, CAS 15721-02-5), often generates wastewater that requires specialized treatment to mitigate environmental impact. Addressing the challenges associated with TCB-contaminated effluents is crucial for sustainable industrial practices. NINGBO INNO PHARMCHEM CO.,LTD. recognizes the importance of environmental stewardship in chemical manufacturing.

Traditional synthesis methods for TCB, while effective for producing the chemical, can lead to effluents containing residual TCB and other byproducts. Research has focused on developing advanced oxidation processes (AOPs) and combined treatment strategies to effectively remove TCB from wastewater. One such approach involves a combination of micro-electrochemical oxidation, air-stripping, and aerobic biological processes.

Micro-electrochemical oxidation, often using iron chipping filtration, can be an initial step in treating the wastewater. This process helps to remove or degrade certain contaminants. Following this, air-stripping is employed to remove volatile organic compounds, including potentially TCB, from the liquid phase by transferring them into the gas phase. This gaseous effluent then requires further treatment to prevent atmospheric pollution.

The final stage often involves aerobic biological treatment. In this process, microorganisms are used to break down remaining organic matter. For TCB wastewater, studies have shown that a combination of these methods can achieve high removal efficiencies for COD (Chemical Oxygen Demand), TCB itself, and ammonia nitrogen. For instance, a combined process has demonstrated removals exceeding 98% for TCB and over 98% for COD. The optimization of hydraulic retention times (HRT), solid suspended solids (MLSS), and gas-liquid ratios are critical parameters for the success of these treatment strategies.

The development of effective wastewater treatment methods for chemicals like TCB is vital for the chemical industry's sustainability goals. It ensures that industrial discharges meet stringent environmental regulations. Companies like NINGBO INNO PHARMCHEM CO.,LTD. are committed to exploring and implementing cleaner production technologies and responsible waste management, contributing to a healthier environment while supplying essential chemicals for global industries.