中性纤维素酶去除景观水COD和SS的影响条件研究  

Influencing Factors for Removing COD and SS in Landscape Water by Neutral Cellulose

作　　者：郑巧霞 问清江[1] 慕娟[1] 孙晓宇[1] 丁浩[1] Zheng Qiaoxia;Wen Qingjiang;Mu Juan;Sun Xiaoyu;Ding Hao(Microbiology Institute of Shaanxi, Xi'an 710043, China)

机构地区：[1]陕西省微生物研究所,陕西西安710043

出　　处：《环境科学与管理》2021年第11期104-107,共4页Environmental Science and Management

基　　金：陕西省重点研发计划项目(No.2019NY-204)。

摘　　要：本试验通过建立景观水模型,探究了不同作用条件下中性纤维素酶对景观水化学需氧量(COD)和悬浮物(SS)的去除效果。结果表明温度55℃、酶浓度5 IU·L^(-1)修复24h,SS去除率可达21.62%;酶浓度、温度一定,修复13 h,COD去除率为10.17%;温度一定,酶浓度6 IU·L^(-1)修复7 h,COD去除率为5.26%、酶浓度7 IU·L^(-1)修复24 h,COD去除率为17.26%;酶浓度、修复时间一定,温度60℃时COD去除率为10.55%;温度60℃、酶浓度7 IU·L^(-1)修复13 h,COD去除率为13.08%;COD去除率影响显著顺序为时间>温度>酶浓度;优化条件后pH7.0时,COD去除率可达17.33%。In order to explore the effect of neutral cellulase on the removal of chemical oxygen demand(COD)and suspended solids(SS)of landscape water under different conditions,a landscape water restoration experiment was carried out by establishing a landscape water model.The research results show that the removal rate of suspended solids could reach 21.62%at 55℃,5 IU·L^(-1),and 24 h;when the enzyme concentration and temperature were constant,the reduction rate of COD could reach 10.17%at 13 h;when the temperature was constant,the reduction rate of COD could reach 5.26%at 6 IU·L^(-1) in 7 hours,and the reduction rate of COD could reach 17.26%at 7 IU/L in 24 hours;When enzyme concentration and repair time were constant,the reduction rate of COD could reach 10.55%at 60℃;When the enzyme concentration was 7IU·L^(-1),temperature was 60℃,and reaction time was 13 h,The reduction rate of COD could reach 13.08%.The significance for COD removal rate are as follows in a descending order Time>Temperature>Enzyme concentration,.After optimizing the conditions,the reduction rate of COD could reach 17.33%at pH 7.0.

关 键 词：化学需氧量 悬浮物 景观水 中性纤维素酶 

分 类 号：X524[环境科学与工程—环境工程]