PURIFICATION OF PHENOL-CONTAINING EFFLUENTS BY ULTRAFILTRATION

Phenols are widely used in manufacturing, so they are present in the wastewater of various enterprises. Phenol-containing wastewater after treatment should be directed to the water recycling system of those enterprises, where they occurred during production, or to the treatment facilities of the settlements where these enterprises are located. The authors of the work proposed an installation consisting of an electrocoagulator, a membrane separator, a pressure thin-layer settling tank and an adsorption filter. The aim of the work was to use the ultrafiltration method for the study of phenol-containing wastewater treatment processes. The objectives of the study were to determine the brand of membrane separator for use in an industrial plant and to determine the technological parameters of its operation. As a result of the conducted experiments the brand of membrane separator was selected for further use in the industrial plant of deep treatment. On the basis of the given research results it can be concluded that the efficiency of phenol-containing wastewater treatment for membrane separators of AR-2,0 H type was 67-75%, for separators of dizzerPuozi-1,8 type - 77-85%, and for UFal 4040-S separators -85-95%. It is observed that the increase in inlet pressure to the membrane separators is not accompanied by an increase in the purification effect, but the filtrate capacity of the separators increases. Besides, increase in phenol content in effluent does not increase the efficiency of membrane separators. Thus, according to the data obtained, after treatment at the proposed plant phenol content in the treated effluent was 0.1-0.4mg / L, and the concentration of phenol in the concentrate was 20.5-30mg / L. Thus, it is recommended to use membrane separators ofUFal 4040-S type manufactured by Rising Sun Membrane TechnologyCo.Ltd (People's Republic of China) for additional treatment of wastewater from phenol.