预处理厌氧组合工艺处理四氢呋喃废水研究

A Study on Tetrahydrofuran Wastewater Treatment by Pretreatment and Anaerobic Combination Process

四氢呋喃是1种难生物降解、具有生物抑制性的杂环有机物,四氢呋喃废水属难处理的化工废水之一。采用铁炭微电解和Fenton催化氧化相结合的预处理工艺可以对四氢呋喃成分进行破坏和分解实验,从而降低生物抑制性并改善可生化性,为后续厌氧处理奠定良好的基础。实验结果表明,原水直接经微电解后,COD去除率稳定在30%左右;原水经微电解＋Fenton（COD去除率50%）后,厌氧处理阶段COD去除率可达80%左右。实际工程中,Fenton的COD去除率建议控制在20%～30%。

As tetrahydrofuran, a kind of heterocyclic organic compounds, is hardly bio-degradable and has biological inhibition, the effluent containing tetrahydrofuran belongs to one of refractory chemical wastewaters. By using a pretreatment technology of combining iron carbon micro-electrolysis and Fenton catalytic oxidation, tetrahydrofuran constituent could be destroyed and decomposed so as to reduce its biological inhibition and improve its biodegradability for subsequent anaerobic treatment. The test has shown that the sole micro-electrolysis process could steadily remove about 30% of COD whilst through combining micro-electrolysis with Fenton process （removing 50% of COD）, the following anaerobic treatment could remove up to around 80% of COD. In practice, it was suggested that the removal of COD by Fenton process should be controlled in the range between 20% and 30%.