The Experimental Study On The THF Wasted Water By Advanced Oxidation Processes(AOPs)

Greater attention are paid to advanced oxidation processes(AOPs) by environmental scholars. AOPs have high efficiency, have no pollution after treatment, so they are prospective technology for treating toxic and low biodegradativ contaminations in water. In this thesis, the THF wastewater as the object will mainly be discussed and was treated by using Fenton reagent oxidation, UV/Fenton reagent oxidation and Titanium dioxide(Ti02) photocatalysis oxidation, the process and mechanism of reaction will also be searched.The results of Fenton reagent(Fe2++H202) showed that the removal efficiency of CODcr is 37% in the optimal conditions of THF wastewater, which condition is that the response PH is 6, FeSO4:7H2O is 0.003mol, H2O2: FeSO4·7H2O (mole ration) is 5:1, the temperature is 45℃, the reaction time is 30min, after responded adjusts PH is under 10 conditions, and concentration of CODcr falls from 18572.118mg/L to 11000mg/L. The results of UV/Fenton reagent showed that the removal efficiency of CODcr is 60% in the optimal conditions of THF wastewater, which condition is that the temperature for 25℃, the ultraviolet ray illumination time is 4.5 hours, FeSO4·7H2O is 0.003mol, H2O2: FeSO4·7H2O (a mole of ratio) is 3:1, before responded PH is under 6 conditions, and concentration of CODcr falls from 19228.722 mg/L to 7800mg/L. When using the Ti02 photocatalysis oxidation processes THF wastewater discovered, under the suitable condition that temperature is 25℃, reaction time is 4 hours,membrane area of reaction 36m2,medium aeration quantity, the CODcr elimination rate majority of conditions issues to 90%. The ultraviolet absorption spectrometry chart as well as in the biochemistry verification test proof THF wastewater densities has reduced, the structure has had the change. THF wastewater may degrade with the above method processing wastewater leakage by the microorganism.The experimental result had proven the Advanced oxidation processes may treat THF wastewater, and enhance its biochemistry performance. Advanced oxidation processes provide the scientific method and the theory basis to treat THF wastewater and other wastewater that is difficult to degrade.