摘要：

总结了A²/O法处理焦化废水的一个实例。实践证明,A²/O法处理焦化废水是可行的,关键是在好氧段中要培养出足够的硝化细菌。工程实际运行结果表明,该系统运行稳定,出水中的酚、氰、COD_Cr和NH₃-N等指标均达到国家标准。酚由400mg/L降到0.5mg/L以下,氰由4mg/L降到0.5mg/L以下,COD_Cr值由3000mg/L降到150mg/L以下,NH_Cr-N由70mg/L降到15mg/L以下。废水处理量为260m³/h。

关键词: 焦化废水, 废水处理, 生物处理

Abstract:

An example of A²/O process for treating coking wastewater is summarized. It is proved feasible. The key technology is that enough nitrobacteria in the aerobic phase are cultivated. Through the start-up and production adjustment, the treatment system has realized stable operation. The indexes such as phenol, cyanide, COD_Cr and NH₃ - N in effluent have all reached the national standard. The phenol content is degraded from over 400 mg/L to below 0.5 mg/L. The cyanide content is degraded from over 4 mg/L to below 0.5 mg/L. The COD_Cr value is degraded from over 3 000 mg/L to below 150 mg/L. The NH₃ - N content is degraded from over 70 mg/L to below 15 mg/L. The wastewater load is 260 m³/h.

Key words: coking wastewater, wastewater treatment, biological treatment

中图分类号: 

• X703.1