Heterogeneous Fenton process is mainly used to degrade wastewater COD. Compared to traditional Fenton process

heterogeneous Fenton can avoid the generation of iron sludge

while the utilization rate of H2O2 still need to be improved. In this work

two type of ceramic membranes assisted heterogeneous Fenton process were proposed. One membrane was used as H2O2 distributor

while another was used for separating and recycling the catalyst. Different catalysts and their COD degradation performance were investigated first. The adding dose and rate of H2O2 and permeate flux were optimized subsequently. The stability of the catalytic and the membrane fouling condition were finally evaluated. The results revealed that cubic Cu2O possessed the best COD degradation performance. When the reaction conditions were that Cu2O (1 g·L-1)

H2O2 dosage (0.8 ml·L-1)

wastewater permeability (137 L·m-2·h-1) and reaction temperature(30℃)

the COD degradation amount of RO(Ⅰ)-RO(Ⅳ) were 11

130

291 and 417 mg·L-1. The utilization rate of H2O2 for RO(Ⅰ)-RO(Ⅳ) were 9%

106%

232% and 334%

the utilization efficiency of H2O2 exceeded 100% means there are chlorine free radicals play a role in COD degradation. The COD degradation amount increased linearly with increasing of Cl-concentration. The COD degradation rate had an increasing tendency with the decreasing of the permeability of separation membrane. In the 360 min reaction process

Cu2O catalyst may form a reversible cake layer on the surface of the membrane distributor. However

this cake layer has scarcely effect on the permeation resistance. The COD degradation were greater than 65% stably. Moreover

with the increase of conductivity in pulp wastewater

catalysts would become instability with more of Cu ion dissolution. In heterogeneous Fenton process

ceramic membrane can enhance the treatment efficiency to pulp waste water

which performed in increasing of the utilization rate of H2O2 and improving the stability in continuous operation process.