Based on wet air oxidation (WAO) and Fenton reagent, this paper raised a new low pressure wet catalytic oxidation (LPWCO) which requires low pressure for the treatment of highly concentrated and refractory organic was...Based on wet air oxidation (WAO) and Fenton reagent, this paper raised a new low pressure wet catalytic oxidation (LPWCO) which requires low pressure for the treatment of highly concentrated and refractory organic wastewater. Compared with general wet air oxidation, the pressure of the treatment(0 1—0 6MPa) is only one of tens to percentage of latter (3 5—10MPa). In addition, its temperature is no more than 180℃. Compared with Fenton reagent, while H 2O 2/COD(weight ratio) is less than 1 2, the removal of COD in the treatment is over twenty percents more than Fenton's even the value of COD is more than 14000mg/L. In this paper, the effect factor of COD removal and the mechanism of this treatment were studied. The existence of synergistic effect (catalytic oxidation and carbonization) for COD removal in H 2SO 4 Fenton reagent system under the condition of applied pressure and heating (0 1—0 6MPa, 104—165℃) was verified. The best condition of this disposal are as follows: H 2O 2/COD (weight ratio)=0 2—1 0, Fe 2+ 0 6×10 -3 mol, H 2SO 4 0 5mol, COD>1×10 4mg/L, the operating pressure is 0 1—0 6MPa and temperature is 104—165℃. This method suits to dispose the high concentrated refractory wastewater, especially to the wastewater containing H 2SO 4 produced in the manufacture of pesticide, dyestuff and petrochemical works.展开更多
Firstly, the water-quality characteristics of intestinal lavage wastewater and enzymolysis wastewater from the typical heparin sodium pro- ductive process were analyzed, and then the segregation treatment was applied ...Firstly, the water-quality characteristics of intestinal lavage wastewater and enzymolysis wastewater from the typical heparin sodium pro- ductive process were analyzed, and then the segregation treatment was applied in the treatment of enteric coating and heparin sodium manufacturing wastewater. Finally, the treatment of the two kinds of wastewater by different methods were discussed. The results showed that, COD of enzymolysis wastewater treated by centrifugation-coagulation-Fenton reagent oxidation-adsorption process was lower than 100 mg/L, while intestinal lavage wastewater treated by coagulation-ASBR-SBR process could meet the first standard of Comprehensive Discharge Standard of Sewage （GB8978-1996） after one month of continuous operation.展开更多
文摘Based on wet air oxidation (WAO) and Fenton reagent, this paper raised a new low pressure wet catalytic oxidation (LPWCO) which requires low pressure for the treatment of highly concentrated and refractory organic wastewater. Compared with general wet air oxidation, the pressure of the treatment(0 1—0 6MPa) is only one of tens to percentage of latter (3 5—10MPa). In addition, its temperature is no more than 180℃. Compared with Fenton reagent, while H 2O 2/COD(weight ratio) is less than 1 2, the removal of COD in the treatment is over twenty percents more than Fenton's even the value of COD is more than 14000mg/L. In this paper, the effect factor of COD removal and the mechanism of this treatment were studied. The existence of synergistic effect (catalytic oxidation and carbonization) for COD removal in H 2SO 4 Fenton reagent system under the condition of applied pressure and heating (0 1—0 6MPa, 104—165℃) was verified. The best condition of this disposal are as follows: H 2O 2/COD (weight ratio)=0 2—1 0, Fe 2+ 0 6×10 -3 mol, H 2SO 4 0 5mol, COD>1×10 4mg/L, the operating pressure is 0 1—0 6MPa and temperature is 104—165℃. This method suits to dispose the high concentrated refractory wastewater, especially to the wastewater containing H 2SO 4 produced in the manufacture of pesticide, dyestuff and petrochemical works.
基金Supported by the Project of Practical Innovation Training Program of Undergraduates in Jiangsu Province in 2012(232)
文摘Firstly, the water-quality characteristics of intestinal lavage wastewater and enzymolysis wastewater from the typical heparin sodium pro- ductive process were analyzed, and then the segregation treatment was applied in the treatment of enteric coating and heparin sodium manufacturing wastewater. Finally, the treatment of the two kinds of wastewater by different methods were discussed. The results showed that, COD of enzymolysis wastewater treated by centrifugation-coagulation-Fenton reagent oxidation-adsorption process was lower than 100 mg/L, while intestinal lavage wastewater treated by coagulation-ASBR-SBR process could meet the first standard of Comprehensive Discharge Standard of Sewage （GB8978-1996） after one month of continuous operation.
