摘要：

某制药厂回收工段产生大量化学原料残液，COD达到70 000~75 000 mg/L，可生化性极差。采用铁碳微电解法分别联合Fenton法和过硫酸盐高级氧化法对其进行预处理。结果表明，当微电解初始pH为5.60、填料用量为750 g/L、停留时间为120 min、过硫酸盐高级氧化初始pH为3.78、Fe²⁺投加量为1.30 g/L、过硫酸氢钾复合盐投加量为5.02 g/L、反应时间为110 min时，该工艺的COD去除率可达到74.51%，且废水的B/C由0.14提升到0.43，可生化性显著改善。

关键词: 化学原料, 制药废水, 铁碳微电解, Fenton, 过硫酸盐

Abstract:

A large number of chemical raw material residual liquids were produced in the recycling section of a pharmaceutical factory, the COD of which reached 70 000-75 000 mg/L, with extremely poor biochemical properties. It was pretreated by iron-carbon micro-electrolysis method combined with Fenton method and persulfate advanced oxidation. The results showed that the COD removal rate could reach 74.51% with the initial pH of micro-electrolysis 5.60, filler dosage 750 g/L, the retention time 120 min, the initial pH of persulfate advanced oxidation 3.78, Fe²⁺ dosage 1.30 g/L, potassium persulfate composite salt dosage 5.02 g/L, and the reaction time 110 min. Simultaneously, the B/C of wastewater was increased from 0.14 to 0.43, and the biodegradability was significantly improved.

Key words: chemical raw material, pharmaceutical wastewater, iron-carbon micro-electrolysis, Fenton, persulfate

中图分类号: 

• X703