There could be several of them, and here are some possible reasons:
Chemical Residues: Laboratories commonly experiment with a variety of chemicals that can remain in the effluent, causing the effluent to exceed treatment standards.
High Concentration of Hazardous Substances: Laboratory wastewater may contain high concentrations of hazardous substances, such as heavy metals, organic matter, etc., which are difficult to completely remove during the conventional sewage treatment process.
Mishandling or mishandling: Laboratory personnel may make mistakes when treating wastewater, resulting in improper treatment methods, or neglecting some treatment steps, resulting in substandard wastewater treatment results.
Faulty or inadequate equipment: Wastewater treatment equipment may be faulty or have insufficient treatment capacity to effectively remove contaminants.
Effluent mixtures: Laboratory effluents can be a mixture of detergents, wastewater, chemicals, etc., which can add to the complexity of treatment.
Lack of effective monitoring and management: The lack of effective monitoring and management measures in the wastewater treatment process makes it impossible to identify problems in time and take measures to improve them.
Non-compliant operations or non-compliance with regulations: There may be some operations that do not comply with relevant environmental regulations, or waste discharge behaviors that violate regulations, resulting in substandard wastewater treatment.
In response to the problem of laboratory wastewater treatment not meeting the standard, a comprehensive analysis is required, including a review of the operation process, the use of chemical substances, the operation status of the equipment, etc., in order to identify the problem and take corresponding improvement measures to ensure that the wastewater treatment meets the standard.