Developing of effective treatment technology of the phenolic wastewater

It is found that a high degree of purification from emulsified coal tar is achieved in the phenolic wastewater treatment using 88 mg/dm 3 of sodium bentonite with the addition of 8 mg/dm 3 of cationic flocculant in conditions the closest to industrial. This innovative method of phenolic wastewater treatment is cost­effective because of the low cost of bentonite. It is shown that the deposit formed during the wastewater treatment with bentonite floats to the liquid surface and can be separated by a scraper device for further utilization in construction. The process of biological treatment of phenolic wastewater in the combined aerator­clarifier unit is shown. It is determined that the optimum time for efficient phenol extraction from wastewater is 6 hours. It is experimentally proved that the use of this unit makes the biological treatment process 4 times faster giving significant economic benefits by reducing energy consumption for aeration. The flow diagram of complex wastewater purification from coal tar and phenol is developed. The use of it at coke and chemical plants will significantly increase the treatment efficiency and product profitability.