Treatment of High Concentration Phenolic Wastewater by Polycondensation

• Main Authors: Yu J. Shiu, 許育彰
• Other Authors: Sheng H. Lin
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/20106920000170334448

碩士 === 元智大學 === 化學工程學系 === 93 === Phenol chemical compound exist of a lot of industrial wastewater. Coal mining, petrochemical refining and coal tar making are typical industries where phenolic compounds exist in the wastewater. Currently, popular methods employed by the industries for treating phenolic wastewater include biological treatment, liquid extraction, adsorption using macroreticular resins and chemical oxidation. Although can all get rid of the phenol chemical compound , deal with the unable too high , problem of dealing with the cost of the thickness expensivly, bring very great puzzlement to the petrochemical industry. So, deal with by combining a step of polycondensation and two step polycondensation procedures high thickness phenol derivative wastewater , such as phenol , o-cresol and resorcinol in this research. The research purpose of the experiment is to include the phenol derivative wastewater for solve the high thickness, probe into the phenol to spread out and can reach the feasibility under discharge standard 1 mg/L to carry out a biological disposal upon the result, the experimental result regards getting removal of the phenol derivative in water as the basis of judging, is divided into a step polycondensation and two step polycondensation procedures and dealt with , a step polycondensation, become and study and discuss by all kinds of at first. If Molar Ratio (formaldehyde mole (F) /phenol mole(P )),HCl Mole , response time . By the experimental result, situation of adding F/P and HCl Mole, there is apparent improvement in the treatment result of the phenol derivative ; The amount of produce produced sees a obvious increase too; The molecular weight of the product , with adding too. Although, treatment result of the phenol derivative is the same, but the best treatment condition is different to some extent, through operating the choice of the condition properly, the phenol , o-cresol , resorcinol are got removal and can be up to about 99.22% , 98.78% and 98.90%. After dealing with a step polycondensation, the phenol derivative is not high in thickness in water, utilize two steps of polycondensation to deal with . Study and discuss by Mole Ratio (urea mole (U ) /formaldehyde mole (F )), pH value , response time. By the experimental result, there is the best treatment result for the situation of 1 in pH value; situation of adding U/F and response time, deal with result is it raise to have even. Proved by the above experimental result, have combined a step of condensation and two step condensation procedures and improved the problem of high concentration phenol derivative wastewater treatment method at present, can offer another kind of choice for practical application of phenol derivative waste water treatment now .