医药中间体高含氨、高含盐废水的处理技术

Treatment technology of pharmaceutical intermediate wastewater containing high ammonia and high salinity

某精细化工厂生产医药中间体格列齐特粗品、氨基杂环盐酸盐和酰亚胺,产生高含氨、高含盐废水。采用凝聚沉淀—三效蒸发浓缩预处理后,与地面冲洗水、设备清洗水等废水混合后通过微电解+A2/O工艺处理,处理后废水总排放口COD、BOD5、SS、氨氮、总氮均达到《化学合成类制药工业水污染物排放标准》(GB 21904—2008)中表2要求,AOX达到《污水综合排放标准》(GB 8978—1996)表4中二级标准。

A fine chemical plant produces pharmaceutical intermediate ： gliclazide crude, amino heterocyclic hydro- chloride and imide, releasing wastewater containing high ammonia and high salinity. After pretreated by floceulation- three effect evaporation and concentration process, and mixed with ground rinsing water and equipment cleaning water, the wastewater is treated by micro electrolysis＋A2/O process. After the treatment,the concentrations of COD, BODs,SS, ammonia nitrogen,total nitrogen at the wastewater total discharge outlet can meet the requirements specified in table 2 of the Discharge Standard of Water Pollution in Chemical Synthesized Pharmaceutical Industry （GB 21904-2008）, and the concentration of AOX meets the requirements specified in table 4 of the second grade of the Integrated Wastewater Discharge Standard（GB 8978-1996）.