芬顿催化氧化-MBBR工艺处理双氧水生产废水

Fenton catalytic oxidation-MBBR treatment of hydrogen peroxide production wastewater

双氧水废水具有高COD_(cr)、低B/C、可生化性差的特点,采用芬顿-MBBR组合工艺对其进行处理.试验结果表明:当H_(2)O_(2)投加量为4 mL/L,H_(2)O_(2)/Fe^(2+)物质量的比为2时,芬顿-MBBR组合工艺对双氧水废水有良好的高COD_(cr)去除效果.芬顿预处理后,B/C由0.11提高到0.47,在连续进水条件下高COD_(cr)去除率为77.7%,生化单元出水高COD_(cr)质量浓度小于500 mg/L.

Hydrogen peroxide wastewater has the characteristics of high COD_(cr),low B/C and poor biodegradability.The wastewater was treated by Fenton catalytic oxidation-MBBR combined process.The results showed that when H_(2)O_(2)dosage was 4 mL/L and H_(2)O_(2)/Fe^(2+)molar ratio was 2,the Fenton catalytic oxidation-MBBR combined process had a good COD_(cr)removal effect on hydrogen peroxide wastewater.After the wastewater was pretreated by Fenton catalytic oxidation,the B/C ratio of the wastewater increased from 0.11 to O.47.The CODer removal rate reached 77.7%and the COD_(cr).concentration out of biological treatment unit subjected to continuous feed was less than 500 mg/L.