Main wastewater containing phenol from coking plant, coal gas, petroleum chemical plant, insulation materials plant and other industrial departments and pyrolysis, synthetic phenol oil, polyamide fiber, synthetic dyes, organic pesticides and phenolic resin production process.
Phenol - containing wastewater mainly contains phenolic compounds, such as phenol, cresol, dicresol and nitrocresol.
Phenolic compounds are protoplasmic toxins that coagulate proteins.
The mass concentration of phenol in water reaches 0.1 a 0.
At 2mg/L, the fish will smell bad and cannot be eaten.
If the mass concentration increases to 1mg/L, it will affect fish spawning. If the concentration of phenol is 5-10 mg/L, the fish will die in large Numbers.
The presence of phenol in drinking water can affect people's health. Even if the concentration of phenol in water is only 0.002mg/L, chlorination will produce chlorophenol stink.
Phenolic wastewater with a mass concentration of 1000mg/L is usually treated.
Called high concentration phenol containing wastewater, this waste water must be recovered phenol, and then treated.
Phenolic wastewater with a mass concentration of less than 1000mg/L is called low-concentration phenolic wastewater.
Such waste water is usually recycled, and phenol is concentrated and recycled for treatment.
The methods of recovering phenol include solvent extraction, steam blowing, adsorption and closed circulation.
Wastewater containing phenol with a concentration of less than 300mg/L can be discharged or recycled after treatment by means of biological oxidation, chemical oxidation and physical and chemical oxidation.