微等离子-生物耦合工艺处理挥发性有机物

Treatment of Volatile Organic Compounds by the Coupling System of Microplasma and Bio-trickling Filter

采用微等离子-生物耦合工艺处理挥发性有机物(VOCs),考察臭氧浓度对生物塔的运行效果及尾气中其它污染物的排放情冴。研究结果表明:当进入生物塔内的臭氧浓度在0.01～0.03 mg/L时,为保证出气浓度低于60 mg/m^3,进气浓度最高达685 mg/m^3;当臭氧浓度在0.001 2～0.001 4 mg/L,系统进气浓度可达1 100mg/m^3,耦合工艺中生物塔的较单纯生物塔处理负荷提高约16%。稳定运行期间,出气中氮氧化物和一氧化碳均低于100 mg/m^3,TOC长期维持在15 mg/m^3以下。说明该耦合工艺中微量臭氧能够加强生物塔内微生物的活性,提高系统处理能力,且不产生二次污染物。

The coupling system of microplasma and bio-trickling filter was used to remove the volatile organic compounds(VOCs). The effect of ozone concentration on the operation of biological tower and the emission of other pollutants in the exhaust gas was investigated. The results showed that when ozone concentration was 0.01~0.03 mg/L,to ensure the outlet concentration less than 60 mg/m^3, the inlet concentration was up to 685 mg/m^3. When ozone concentration was 0.001 2~0.001 4 mg/L, the inlet concentration can be up to 1 100 mg/m^3. The load of biological tower was increased by about 16% compared with the pure biological tower. In the coupling process, nitrogen oxides and carbon monoxide in outgassing were all below 100 mg/m^3,TOC was below 15 mg/m^3. The micro ozone in the coupling process can enhance the activity of microorganisms in the bioreactor, improve the treatment capacity of the system, and do not produce secondary pollutants.