Study on Efficient Purification of Wastewater from Dioctyl Phthalate Production

In this paper, a self-made three dimensional electrode wastewater purification device is adopted. The electrode is flake iron electrode and activated carbon particle electrode, and the distance between the two electrodes is fixed. The electrolytic voltage, the amount of particle electrode activated carbon, electrolytic time, initial pH were respectively controlled to explore the treatment effect of DOP wastewater in three-dimensional electrode reactor under different treatment conditions, and the optimal conditions of DOP wastewater treatment were obtained through orthogonal test. The order of factors influencing COD degradation rate of DOP wastewater is as follows: initial pH of wastewater > other factors and variables > electrolytic time > activated carbon dosage. The optimal scheme is as follows: electrolytic voltage is 36 V, activated carbon dosage is 14 g/L, initial pH of wastewater is 4, and electrolytic time is 80 min. It is proved that the COD degradation rate of DOP wastewater water sample is 81.41% under this condition. The order of factors influencing the turbidity removal rate of DOP wastewater is as follows: initial pH of wastewater > other factor variables > activated carbon dosage > electrolytic time. The optimal scheme is as follows: The discharge voltage is 36 V, the dosage of activated carbon is 10 g/L, the initial pH of wastewater is 5, and the electrolysis time is 90 min. Experimental verification shows that under these conditions, the turbidity removal rate of DOP wastewater water sample is 84.21%.