基于模糊数学方法的好氧污泥颗粒化过程综合评价

摘要: 在传统模糊综合评价法的理论基础上,建立了好氧污泥颗粒化过程的综合评价体系。依据成功培养了好氧颗粒污泥的实验室规模反应器的实测数据,以污泥SVI₅/SVI₃₀、比重、圆度、长径比、形状因子、分形维数、密实度7个参数作为评价指标,构建隶属函数和隶属矩阵,结合层次分析法与熵权法构建权重矩阵,将好氧污泥颗粒化过程划分为絮体阶段、初始颗粒化阶段、快速颗粒化阶段和完全颗粒化阶段4个过程。建立模型验证组,通过验证组不同时间点的监测数据,基于所建立的评价体系,对系统运行过程中不同时间点的污泥颗粒化阶段进行预测。该综合评价体系能够为好氧颗粒污泥培养系统中,污泥实时所处的颗粒化状态做出准确、客观的判断,且能够及时发现系统异常情况,对维持系统的稳定性具有重要意义。
- 好氧颗粒污泥 /
- 颗粒化 /
- 模糊数学 /
- 综合评价 /
- 状态预测
Abstract: A comprehensive evaluation system of the aerobic sludge granulation process was established based on the traditional fuzzy comprehensive evaluation method.Based on the data of the laboratory scale reactor that successfully cultivated aerobic granular sludge,the membership function and membership matrix were constructed by taking the seven parameters including SVI₅/SVI₃₀,specific gravity,roundness,length-diameter ratio,shape factor,fractal dimension,and compactness as the evaluation indexes.The weight matrix was constructed by combining analytic hierarchy process and entropy weight method.The process of aerobic sludge granulation was divided into four stages:floc stage,initial granulation stage,rapid granulation stage,and complete granulation stage.The model verification group was established,and the sludge granulation stage at different time in the system was predicted based on the established evaluation system.This comprehensive evaluation system can make an accurate and objective judgment for the real-time granulation status of sludge in aerobic granular sludge cultivation system,and can timely find the abnormal situation of the system,which is of great significance to maintaining the stability of the system.
- aerobic granular sludge /
- granulation process /
- fuzzy mathematics /
- comprehensive assessment /
- state prediction

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