摘要
主要研究辐射技术对污泥沉降与脱水特性的影响,实验采用某污水处理厂的样品经过微波、超声辐射改性后,对毛细吸水时间(CST)、粘度、污泥沉降比(SV)、含水率、上清液的COD浓度、Zeta电位、形态学特征的变化情况进行了研究。实验结果表明,微波辐射后污泥颗粒的平均粒度由33.551μm降低到28.979μm,分形维数在2.8左右,图像显微分析表明微波调质后污泥有粗大化现象;超声辐射后污泥的粒度由33.551μm降低到9.435μm,分形维数在2.9左右,超声调质后污泥颗粒较小;利用Origin8.0软件对污泥脱水特性与污泥含水率进行分析,建立了污泥脱水特性的模型有助于在线预测污泥含水率。
Settling and dewatering characteristics of sludge from sewage treatment plant by radiation including microwave and ultrasound were studied. CST, viscosity, settling ratio, water content, COD, Zeta electric potential and morphological were tested. After microwave modification, particle size of sludge reduced from 33.551 μm to 28.979 μm, fractal dimension was about 2.8, and microscopic image analysis showed that the particle of sludge became coarsening. After ultrasound modification, particle size of sludge reduced from 33.551μm to 9.435μm, fractal dimension was about 2.9, and the smaller particles were observed after ultrasound. Origin 8.0 software was used to analyze dewatering characteristics of sludge and water content, and to establish the model for the prediction of moisture content of sludge online.
出处
《环境科技》
2011年第5期5-7,共3页
Environmental Science and Technology
基金
北京市属高等学校人才强教深化计划资助(RHR201008362)
关键词
污泥
微波
超声
脱水特性
形态学
Sludge
Microwave
Ultrasound
Dewatering characteristics
Morphological
