Chemical synthesis pharmaceutical plants involve a wide range of chemical elements, leading to wastewater contamination by various chemical substances. Regulatory frameworks specify discharge limits for water pollutants, monitoring and supervision requirements, as well as provisions for standard implementation and oversight in the chemical synthesis pharmaceutical industry. Wastewater from such plants must undergo testing for specific pollution parameters before discharge.
Chemical synthesis pharmaceutical plants are equipped with multiple online water quality monitoring stations rather than a single one. Key monitoring points include: the total wastewater discharge outlet, stormwater discharge outlet, wastewater discharge outlets of workshops or production facilities, and domestic sewage discharge outlets.
The parameters to be monitored vary by outlet type:
1.Total wastewater discharge outlet: A comprehensive set of parameters is monitored, including chemical oxygen demand (COD), flow rate, pH value, ammonia nitrogen (NH₃-N), total phosphorus (TP), total nitrogen (TN), suspended solids (SS), chroma, acute toxicity (expressed as HgCl₂ toxicity equivalent), total organic carbon (TOC), total cyanide, volatile phenols, total copper (Cu), total zinc (Zn), nitrobenzene compounds, aniline compounds, dichloromethane, and sulfides.
2.Workshop/production facility discharge outlets: Parameters include flow rate, total mercury (Hg), total cadmium (Cd), hexavalent chromium (Cr⁶⁺), total arsenic (As), total lead (Pb), and total nickel (Ni).
3.Domestic sewage discharge outlet: Parameters include flow rate, pH value, COD, NH₃-N, TP, TN, SS, and animal/vegetable oils.
4.Stormwater discharge outlet: Parameters include pH value, COD, NH₃-N, and SS.
These parameters serve as regulatory references required by environmental protection authorities. However, the specific parameters monitored by individual plants should be flexibly determined based on their actual wastewater quality. For water quality testing equipment, Hangzhou Modi recommends single-parameter devices, as they typically offer higher accuracy compared to multi-parameter alternatives.
