特定污泥对铬(Ⅵ)的吸附容量研究

接种了高效菌种A、B的驯化污泥在前期的生物滤床系统中体现了良好的铬(Ⅵ)去除效率,为了解决系统放大后污泥再生与使用周期等问题,对污泥的铬(Ⅵ)吸附容量进行了测定,测定项目包括一次连续吸附总量、营养添加前后吸附容量的变化等。以铬(Ⅵ)质量浓度为100mg/L的废水进行实验,得到该污泥吸附最佳时间为40min,此时污泥对铬的吸附能力为污泥自身干重的14 94%。一次连续吸附总量为27～28mg/g干污泥。营养液的加入使得污泥吸附能力提高了29 68%。

Study onw Cr(Ⅵ) adsorption capacity of specific sludge

To solve the problems of sludge reproduction and useful period in a scale-up system, the Cr(Ⅵ) adsorption capacity of the acclimated sludge inoculated with efficient fungi A and B, which has shown good Cr(Ⅵ) removal rate in biofilter system, is tested. Parameters are measured, including the one-time continuous adsorption capacity, the variation of Cr(Ⅵ) adsorption capacity in the presence or absence of nutrients, etc.. The experiment on wastewater containing (Cr(Ⅵ) )with a concentration of 100mg/L indicates that the optimal adsorption time is about 40min, and the corresponding Cr~(6+) adsorption capacity is 14.94% of the sludge dry-weight. The one-time continuous adsorption capacity can reach 27～28?mg/(g dry sludge). In the presence of nutrients, the capacity gets an increase of 29.68%. The results can give some useful references to system scale-up.