ABR反应器处理畜禽养殖废水中厌氧污泥颗粒化的研究

Granulation of Anaerobic Sludge in Anaerobic Baffled Reactor Treating Livestock Wastewater

为了研究厌氧污泥颗粒形成过程中各因素的影响规律,本文采用厌氧折流板反应器（ABR）-改良序批式反应器（MSBR）联合工艺处理畜禽污水,通过单因素研究了影响规律,并对污泥形貌进行了表征.结果表明：有机负荷、有机底物浓度、pH值等因素的合理控制可以促进污泥颗粒化,进而加快系统的启动.CODCr浓度为10000mg/L时,颗粒污泥的粒径分布为0.2-4.5mm,显微镜低倍镜下观察到边缘非常整齐的菌团,主要菌种符合丝状产甲烷菌特征;扫描电镜清晰显示出颗粒污泥的形貌,呈球形、椭球形,表面有孔隙.启动达到设计负荷后,获得72%的CODCr去除率,产甲烷活性达到0.36m^3 CH4/kgVS.

In order to study the influence law of various factors at the formation process of anaerobic sludge granules,the anaerobic sludge granulation in anaerobic unit of the livestock wastewater was treated by the combined process of anaerobic baffled reactor（ABR）and modified sequencing batch reactor（MSBR）,and single factor was studied,and sludge morphology was characterized.The results show that,the granulation can be promoted by control the factors of organic loading rate（OLR）,chemical oxygen demand（COD）concentration in the influent and pH value,and accelerate to start the ABR system.On the basis of high CODCrstrength of 10 000mg/L,the granules comprising of predominant filamentous methanogens present outstanding CODCrremoval rate of 72% with size ranging of 0.2-4.5mm and near spherical and ellipsoidal shape,surface porosity,and the methanogens exhibit methane yielding property of 0.36m^3 CH4/kgVS at designed organic loading rate.