Laboratory wastewater generally contains a certain amount of chemical reagents, and at the same time, due to special chemical experiments, the wastewater produced in the experiment may also contain certain bacteria or even radioactive elements, if these wastewater is not treated and directly discharged, it will cause serious pollution and harm to the environment.
When we treat wastewater, it is often difficult to grasp the type of wastewater, so it is difficult to start. And sometimes because you don't have a good grasp of how to deal with it, it ends up in a mess.
Laboratory wastewater is different from industrial wastewater in that the composition and quantity of laboratory wastewater are stable, and there are many types and high concentrations. Therefore, the risk of laboratory wastewater treatment is also relatively high. Some precautions for handling are described below:
1.Fully understand the method of processing:
Laboratory wastewater treatment methods vary depending on their characteristics, and it is important not to attempt to treat any wastewater without a full understanding of its treatment methods, as accidents are likely to occur.
2. Pay attention to the absorption of toxic wastewater:
Most of the laboratory wastewater only has a slight discomfort when it touches, a small number of corrosive waste will be harmed**, and some of the wastewater will be absorbed and poisoned, one example is the aniline wastewater that caused the death of two people in Dashu Township, Kaohsiung County. It will absorb highly toxic wastewater through **, and special attention needs to be paid when handling or treatment, and it should not be touched**.
3.Pay attention to the production of toxic gases:
When laboratory wastewater is treated, toxic gases will be produced if it is not properly operated, and the common ones are listed as follows:
1) Cyanide mixed with acids produces highly toxic cyanic acid.
2) Bleach mixed with acid will produce highly toxic chlorine or metahypochlorous acid.
3) Sulfides mixed with acids produce highly toxic sulfides.
4.Pay attention to the production of sexual substances: when treating laboratory wastewater, it should be treated in full accordance with the known treatment methods, and should not be mixed with other wastewater, otherwise it is easy to produce ** danger. Some of the more harmful mixtures are listed below:
1) Sodium azide mixed with lead or copper.
2) Mixing of amines with bleach.
3) Mixing of silver nitrate with alcohol.
4) Mixing of calcium hypochlorite with alcohol.
5) Acetone is mixed with chloroform in alkaline solution.
6) Mixing of nitric acid with acetic anhydride.
7) Mixing of silver oxide, ammonia, alcoholic acid wastewater.
Other wastewater that is very easy to produce peroxides (such as: isopropyl ether) should also be paid special attention to, because peroxides are very easy to be caused by heat, friction, impact, etc., and the peroxides produced by such wastewater should be removed before treatment.
5.Other precautions:
Due to the high concentration of laboratory wastewater, accidents occur when it is easy to treat due to the increase in the reaction rate of a large number of exothermic fires. In order to avoid this, the following principles should be taken into account when retreating laboratory wastewater:
1) A small amount of wastewater is treated to prevent a large number of reactions.
2) The treatment agent should be poured slowly to prevent violent reactions.
3) Stir well to prevent local reactions.
If necessary, water is added to the water-soluble wastewater to dilute it to ease the reaction rate and reduce the rate of temperature rise, preferably if the treatment plant contains a relocation device.