摘要
文章以COD去除率为评价指标,采用单因素试验及Box-Behnken响应面法,研究运行压力,pH值和系统沼液回收率对COD去除率的影响,确定反渗透技术去除沼液COD的最佳反应条件。结果表明:最优反应条件为运行压力5.60Mpa,pH值7.70,沼液回收率76.00%,COD的去除率可达97.51%。各参数对COD去除率影响主次顺序为pH值>沼液回收率>运行压力。运行压力和沼液回收率、运行压力和pH值,二者的交互作用均极显著,pH值和沼液回收率的交互作用显著。模型的p值小于0.0001,极显著,而失拟项的p值为0.5804大于0.05,不显著,说明模型拟合程度高,相关性很好,该试验可用于反渗透技术去除沼液COD研究。
Taking the COD removal efficiency as the response value, to optimize the reaction conditions of reverse osmosis technology for COD removal. Single factor test and Box-Behnken response surface method were adopted to investigate the effect of process operation pressure, pH value and recovery rate on the COD removal, and to find the best operation condi- tion for the reverse osmosis removing the COD from the biogas slurry. The results showed that the optimal conditions were： under the operation pressure of 5.60Mpa, the pH value of 7.70, and the slurry recovery rate of 76.00%, the removal rate of COD was up to 97.54%. The effecting order were pH 〉 recovery rate 〉 operating pressure. And the interaction effect of the operation pressure and the under recovery rate, the operation pressure and pH, were extremely significant, and the in- teraction effect of pH and the under recovery rate was significant. The p value of the model less than 0. 0001 meant very significant, but the lack of fit P values of the model was 0.5804 〉 0.05, indicating that the lack of fit was not significant. The model fitting degree was high and good correlation.
出处
《中国沼气》
北大核心
2016年第2期24-29,共6页
China Biogas
基金
国家重大专项(2012ZX07202-010)
