4种添加剂对黑曲霉脱除高磷铁矿中磷的影响.pdfVIP

第36卷第4期 矿 冶 工 程 V〇1.36 ^4 2016年08月 MINING AND METALLURGICAL ENGINEERING August 2016 4 种 添 加 剂 对 黑 曲 霉 脱 除 高 磷 铁 矿 中 磷 的 影 响 向 杰 ，肖春桥，刘好好，池汝安 (武汉工程大学绿色化工过程教育部重点实验室，湖北武汉430073) 摘 要 ：考察了赤霉素、a -萘乙酸、芸香叶苷及酵母浸粉4种添加剂对黑曲霉在液体培养条件下的产酸及脱除高磷铁矿中磷的影 响。结果表明，4种添加剂均能有效促进培养液pH值的降低，提高黑曲霉的脱磷率。当赤霉素、a -萘乙酸、芸香叶苷及酵母浸粉的 浓度分别为1.0、1.0、10~20、1000 mg/L 时，培养液的pH值最低，所得脱磷率最高分别为41.79%、40.83%、45.75%、50.12%。分析了 4种添加剂提高黑曲霉脱磷的机理，发现4种添加剂对黑曲霉生长及其产酸的促进作用是其提高黑曲霉脱磷效果的主要原因。 关键词 ：黑曲霉；高磷铁矿；脱磷；有机酸；添加剂 中图分类号：TD925.5 文献标识码 ：A doi :10.3969/j .issn .0253-6099.2016.04.020 文章编号 ：0253-6099(2016)04-0076-04 Effects of Four Additives on Dephosphorization of High-phosphorus Iron Ore by Aspergillus Niger XIANG Jie， XIAO Chun -qiao， LIU Ting -ting， CHI Ru-an (Key Laboratory for Green Chemical Process of Ministry of Education ， Wuhan Institute of Technology ， Wuhan 430073， Hubei ， China ) Abstract ： The effects ol four additives ol gibberellin ，a -naphthy 1acetic acid， rutin hydrate and yeast extract powder on the production ol organic acids and dephosphorization ol high-phosphorus iron ore were investigated in liquid culture ol aspergillus niger . The results showed that four additives could efficiently reduce the pH value of the culture medium and promote the dephosphorization rate . When the concentrations ol gibberellin ， a-naphthylacetic acid ， rutin hydrate and yeast extract powder were 1.0，1.0，10 〜20 and 1 000 mg/L ，respectively ， the highest dephosphorization rates ol lour additives were 41. 79%， 40. 83%， 45.75% and 50.12%， respectively . The main mechanism for dephosphorization promoted by lour additives was discussed . It is found that lour additives accelerate the growth ol aspergillus niger and organic a