活性黄KE-4RN的厌氧脱色研究

摘要

考察了活性黄KE-4RN在中温(35 ℃)条件下的厌氧脱色情况,从脱色率、VFAs(挥发性脂肪酸)、CODCr (化学需氧量)去除率、污泥吸附、产气量和生物气组分等方面分析了其脱色的形式和程度,并对其厌氧脱色的机理作了初步探讨.结果表明,活性黄KE-4RN不易被完全矿化,其脱色主要是污泥吸附和厌氧生物初级降解的共同作用,且脱色率随染料的浓度增大而减小.浓度≤80 mg·L-1(以碳计)的活性黄KE-4RN经2 w降解,脱色率可以达到94%,CODCr去除率在90%以上.%Based on an anaerobic batch test system under 35 ℃, the effects of volatile fatty acids (VFAs) and sludge adsorption on decolorization of reactive yellow KE-4RN were studied in details.The form and extent of anaerobic decolorization were detected by gas production amount and composition, and the degradation mechanism of reactive yellow KE-4RN reduction was also discussed.The results indicated that the reactive yellow KE-4RN was difficult to be anaerobic biodegraded into CO2 and CH4 completely.The decolorization should be joint action of sludge adsorption and anaerobic primary biodegradation and the rate of decolorization was inversely proportional to dye concentration.Under the conditions of dye concentration ≤ 80 mg·L-1 (calculated by C) and biodegradation for 14 d, the decolorization rate could attain 94% and the removal rate of CODCr could be over 90%.