维生素A合成废水难降解成分的定性分析及处理建议

采用吹扫捕集气相色谱-质谱法定性分析了维生素A生产企业污水处理厂的出水和现场中试出水中主要残留难降解成分。结果表明两种出水中10.7 min出峰的物质是含量最高最主要的难降解成分,是COD降不下去的最主要原因。结合维生素A合成工艺、这个物质的物理、化学性质、水样的颜色、气味确定了该物质是3-甲基-1-戊烯-4-炔-3-醇,并从可能的代谢途径分析了该物质难以降解的原因。并从合成工艺和污水处理工艺方面提出了污水处理的建议。

Qualitative Analysis and Treatment Proposals for Difficultly Degraded Elements in Wastewater of Synthesizing Vitamin A

Residual elements which are difficult to degrade from the effluent of wastewater treatment plant in a vitamin A producing company and the on-site pilot test were qualitatively analyzed by using P&T/GC-MS technique.Results showed that the substance at 10.7 min represented the highest quantity and main difficultly degrade constitute in the two kinds of effluents,and was the main cause to result in COD not dropped.The substance was determined as 3-metyl-1-penten-4-yn3-ol in combination with assumption of synthesizing vitamin A process,as well as analysis of the physical and chemical characteristics of the substance shown on MS figure and the color and odor of wastewater sample,and difficulty degraded causes were analyzed from the possible metabolize way.Several treatment solutions were proposed from the two aspects including improving product synthetic process and wastewater treatment technology.