Collection: Laboratories should collect waste liquids and store them in appropriate containers. The containers should be reusable, not disposable. Waste liquids should be categorized, e.g. organic waste liquids, acid and alkali waste liquids, etc., for further processing.
Pre-treatment: Before storing waste liquids, they should be pre-treated. For example, acid and alkali waste liquids should be neutralized by lime or sodium hydroxide, and organic waste liquids should be adsorbed by activated carbon or molecular sieve. Pretreatment can improve the treatability of waste liquids and reduce the difficulty of subsequent treatment.
Purification: After pretreatment, the waste liquid should enter the purification equipment for treatment. The purification equipment can be filters, reverse osmosis, ion removers and so on. The purification equipment should be regularly maintained and cleaned to ensure its effectiveness and safety.
Discharge: The purified waste stream should be discharged into the natural environment, but local environmental regulations and standards need to be followed. For example, in some areas, organic waste streams may need to be diluted and discharged into rivers. It should be ensured that the discharge of waste liquids complies with local regulations and standards before discharge.
In conclusion, the disposal of waste liquids in laboratories needs to be handled with care to ensure the protection of the environment and human health. If you are unsure how to handle waste fluids, consult your local environmental protection agency or professional.