摘要
采用γ-射线辐照法对城市污水厂剩余污泥进行预处理，从固体组分、可溶性组分及厌氧产气量等角度来探讨γ-射线辐照法改善城市污水厂剩余污泥厌氧消化特性的可行性。结果表明，经γ-射线辐照处理后，污泥的平均粒径减小，在辐照剂量为6．51-30．75kGy范围内，粒径的减小率达30％-50％；可溶性有机组分随着辐照剂量升高而增加，当辐照剂量为19．4kGy时，SCOD增加率达552．5％；与未辐照相比，污泥经2．48、6．51、11．24kGy辐照处理后，厌氧消化累计产气量分别增加8．89％、19．74％和35．81％。γ-射线辐照法是一种有效的改善污泥厌氧消化特性的方法，11．24kGy左右的剂量可作为污泥预处理的最佳剂量。
Anaerobic digestibility of excess sewage sludge was studied from the aspects of solid components, soluble components and gas production after γ-irradiation pretreatment. Average particle size of sludge was minished after γ-irradiation. The reduction rate of particle size was up to 30% - 50% at absorbed doses from 6.51 to 30.75 kGy. Both soluble organic component and gas production were increased after irradiation. The addition of soluble chemical oxygen demand （SCOD） was up to 552.5% at 19.4 kGy. While accumulated gas production of anaerobic digestion increased 8.89% , 19.74% and 35.81% at 2.48, 6.51 and 11.24 kGy, respectively. All of these indicate that γ-irradiation pretreatment is an effective method to enhance anaerobic digestibility of sewage sludge and 11.24 kGy is considered to be the best dose for the pretreatment of sewage sludge.
出处
《环境污染治理技术与设备》
CSCD
北大核心
2006年第8期36-39,共4页
Techniques and Equipment for Environmental Pollution Control
基金
国家自然科学基金资助项目(10075027)
江苏省环保科研计划项目(9903)
关键词
γ-射线
固体组分
可溶性组分
厌氧消化特性
γ-irradiation
solid components
soluble components
anaerobic digestibility
