超声联合热碱技术促进剩余污泥破解的参数优化

发布时间：2018-06-04 18:24

  本文选题：响应曲面法 + 超声联合热碱预处理　； 参考：《中国环境科学》2017年09期

【摘要】：为了进一步提高超声联合技术破解污泥的效果,在前期双因素的研究基础上,采用3因素3水平的响应曲面法分析了热水解温度(60,70,80°C)、加碱量(0.04,0.07,0.10g/g TS)和超声能量(4000,8000,12000k J/kg TS)对污泥破解度的影响.回归分析结果表明污泥破解度与三因素之间符合三元二次方程:Y=-196.87+6.11X_1+487.53X_2+0.0039X_3-1.742X_1X_2-0.000024X_1X_3+0.0044X_2X_3-0.0398X_1~2-2488.33X_2~2-1.33×10-7X_3~2,其中X_1、X_2、X_3分别为温度、加碱量和超声能量.模型拟合度高达97.548%,表明该模型能较好地模拟超声联合热碱预处理参数和预测污泥破解度.根据模型得出最佳预处理工艺组合为:温度73.06℃,加碱量0.085g/g TS,超声能量9551k J/kg TS.最佳工艺参数下污泥破解度实测值为60.411%.经济性分析表明,超声联合热碱预处理条件下每t污泥处理费较未处理污泥降低了20.42元,在本研究条件下具有较高的经济可行性.
[Abstract]:In order to further improve the effect of ultrasonic combined technology on sludge cracking, on the basis of the previous study of two factors, In this paper, the effects of hot water decomposition temperature, 0.04 ~ 0.07 ~ 0.10 g / g TSS and ultrasonic energy ~ (4 000 ~ 8 000 ~ (000) K J/kg) on the cracking degree of sludge were analyzed by using 3 factors and 3 levels of response surface method. The results show that the temperature of hot water decomposition is 600.80 掳C ~ (-1), the amount of alkali added is 0.04 ~ (7) ~ 0. 10 g / g). The results of regression analysis show that the sludge cracking degree and the three factors accord with the ternary quadratic equation: Yan-196.87 6.11X_1 487.53X_2 0.0039X_3-1.742X_1X_2-0.000024X_1X_3 0.0044X_2X_3-0.0398X_1~2-2488.33X_2~2-1.33 脳 10 ~ (-7) X _ 3s _ 2, in which X1T _ (1) X _ (2) X _ (2) T _ (3) is respectively the temperature, the amount of alkali added and the ultrasonic energy. The fitting degree of the model is as high as 97.548, which indicates that the model can well simulate the parameters of ultrasonic combined with hot alkali pretreatment and predict the degree of sludge cracking. According to the model, the optimum pretreatment process was obtained as follows: temperature 73.06 鈩，

本文编号：1978408