活性红KE-3B的厌氧降解

考察了活性红KE-3B在中温(35℃)、高温(55℃)条件下的厌氧降解性,从产气量、脱色率、VFAs、CODCr去除率等方面研究了其处理效果和降解机理.结果表明,活性红KE-3B不易被完全矿化,只是发生了初级降解;中温条件下有利于提高生物气中的甲烷比率,但VFAs积累较多,对最终生化降解起到了抑制作用;高温条件下,脱色率随染料的浓度增大而减小,并且在同等条件下比中温时脱色率高,最高达到97.40%,同时高温时的CODCr去除率也相对较高,达到了84.53%.活性红KE-3B废水更适合低浓度高温处理,理想处理浓度≤80mg/L(以C计).

Anaerobic Biodegradation of Reactive Red KE-3B

The anaerobic biodegradability of reactive red KE-3B was studied in batch experiments under mesophilic(35 ℃)and thermophilic(55 ℃)conditions,and the factors such as decolorization rate、VFAs、CODCr removal rate etc,were detected to evaluate its treatment effects and degradation mechanism.The results showed that the reactive red KE-3B was difficult to be anaerobic biodegraded into CO2 and CH4 ultimately,and further to say the decolorization was just due to primary degradation.The ratio of CH4 in biogas was higher under mesophilic condition,but the value of VFAs was high,which had inhibited the ultimate biodegradation.The decolorization rate decreased as the dye concentration increased under thermophilic condition.Compared with the mesophilic tests,the higher decolorization rate was obtained in the thermophilic tests under the same conditions,with the highest decolorization rate of 97.40 %.The highest CODCr removal rate,which was also higher under thermophilic condition,could attain 84.53 %.Based on these results,the conclusion to be made was that the treatment of reactive red KE-3B wastewater,was more suitable for low concentration under thermophilic condition,which ideal treatment concentration was ≤80 mg/L(calculated by C).