厌氧生化技术在己内酰胺废水处理中的应用

根据己内酰胺装置废水的特点 ,选用了厌氧生化处理技术对其中有机废水进行预处理。讨论了温度、pH值、营养盐、微量元素等外在因素及硫酸盐、氨氮浓度、有机物组成成分等内在因素对系统的影响及其对策。提出了最佳运行条件 :负荷 4.5～ 5 .0kgCOD/(m3·d) ,波动小于 15 % ,进水温度约 33℃ ,进水 pH值为 5～ 6,温度 35～ 38℃ ,pH值为 7.5～ 8.5 ,挥发性脂肪酸小于 12mmol/L ,硫酸盐浓度不大于 5 0 0mg/L。处理后己内酰胺废水COD值由原 15 0 0 0mg/L降低至 1977mg/L。

Anaerobic biochemistry treatment for caprolactam sewage

According to the feature of waste water from caprolactam production, anaerobic biochemistry treatment was adopted to pretreat organic sewage. The technological process was as follows: load 4.5～5.0 kg COD/m 3·d, fluctation less than 15%, influent temperature about 33℃ and pH value 5～6, temperature 35～38℃, pH value 7.5～8.5, volatile fatty acid content less than 12 mmol/L, SO 2- 4 concentration not more than 500 mg/L. After treatment, COD value of caprolactam sewage decreased from 15 000 mg/L to 1 977 mg/L.