Study On The Treatment And Resource Reuse Of Lipoic Acid Wastewater
Bioinformatics and Biomedical Engineering(2010)
摘要
The best resin which is used to recovery lipoic acid in lipoic acid wastewater is NG-16 macroporous adsorption resin. The result is determined by dynamic adsorption experiments. The optimal operation conditions are as follows: pH value of 5-5.5, at room temperature, adsorption flux of 3BV/h, double-column series disposing volume is 25BV/batch; at 303K, the resin is desorbed by 3BV methanol+2BV water, at 1BV/h flux; the pH of highconcentration desorption solution is adjusted to 7.2-7.8, and lipoic acid and methanol are recoveried by distillation; low-concentration desorption liquid is applied for next batch. Per tonne of waste can be recoveried 1.1kg lipoic acid about 80% purity. The lipoic acid content in treated wastewater is reduced from 1300-1500mg/L to 0, the total sulfur content is reduced from 400-450mg/L to 0.05mg/L, B/C increased from 0.30 to 0.65.
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关键词
lipoic acid,resource reuse,resin,adsorption,desorption,methanol
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