摘要
从印染废水污泥中分离筛选出对三苯甲烷类染料甲基紫具有降解活性的细菌L3,经紫外线诱变,获得高活性变异菌株UV2L3,并对其进行降解性能测定.根据对UV2L3在不同的pH值、脱色温度及时间等条件下降解甲基紫数据测定的基础上,设计正交实验,获得其降解模拟废水的最佳反应条件.研究表明,诱变菌株UV2L3在30℃及pH值为8.0的条件下,72h对浓度为50mg/L的甲基紫模拟废水的脱色率达78%以上,比出发菌株L3提高44%.脱色后模拟废水的CODcr值为110mg/L,去除率为75%.
The bacteria L_3 which has degradation activity to triphenylmethane dye methyl violet (MV) was (isolated) from textile wastewater sludge. Through mutation by ultraviolet(UV), a high active mutation (strain) UV_2L_3 was obtained. The orthogonal experimental results showed that the decolor ratio is 78% for UV_2L_3 to MV on the condition of pH 8.0,30 ℃ and 72 h, which is higher 44% than original strain L_3. CODcr of the decolorized wastewater is 110 mg/L and the decrease ratio of CODcr is about 75%.
出处
《纺织高校基础科学学报》
CAS
2004年第3期243-246,共4页
Basic Sciences Journal of Textile Universities
基金
陕西省教育厅基金资助项目(02JK072)
西安理工大学校基金(210101)
关键词
生物降解
紫外线诱变
正交实验
三苯甲烷类染料
甲基紫
biodegradation
ultraviolet mutation
orthogonal experiment
triphenylmethane dyes
methyl (violet)