Microwave enhanced Fenton-SBBR combining process for treatment of DMSO-containing wastewater
LI Xi-xi1, CHEN Hong-min1, ZHOU Bi-lian1, CHEN Yu-cheng2
1. Chongqing Chemical Industry Vocational College, Chongqing 401228, China; 2. College of Resources & Environment, Southwest University, Chongqing 400716, China
Abstract: A microwave enhanced sensitized Fenton system is used for treating DMSO-containing wastewater.The effects of microwave irradiation time,microwave power,pH value,H2O2 dosage,dosing method,and Fe2+/H2O2 molar ratio on the removal rate of DMSO are explored.It is found that the removal rate of DMSO from wastewater can reach as high as 98.85% when the initial mass concentration of DMSO-containing wastewater is 50 g·L-1,microwave irradiation lasts for 5 min,microwave power is 240 W and H2O2 dosage is 5 mL·min-1,the molar ratio of Fe2+/H2O2 is 1/16 and pH is not adjusted.The residual wastewater after treatment by microwave-enhanced Fenton method is further treated by SBBR method,and the removal rate of DMSO from wastewater with a mass concentration lower than 1.1 g·L-1 is stable above 90% under normal operation conditions.
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