超声联合热碱预处理对剩余污泥厌氧消化的影响

发布时间：2018-01-31 10:35

本文关键词： 剩余污泥联合预处理含固率厌氧消化　出处：《环境污染与防治》2017年11期 　论文类型：期刊论文

【摘要】：以不同含固率剩余污泥为研究对象,在超声联合热碱预处理条件下,考察了污泥在厌氧消化过程中的减量以及细胞物质释放的特性。厌氧消化阶段,经过预处理作用的预处理泥挥发性悬浮固体(VSS)、溶解性COD(SCOD)的去除率均高于原泥,且VSS、SCOD去除率均随污泥含固率的增加而减少,SCOD去除率(X_(SCODr),%)和产气量(Y_(QY),mL/g)存在定量函数关系,即Y_(QY)=-0.148 7 X~2_(SCODr)+24.771 X_(SCODr)-775.68,同时SCOD去除率与VSS去除率(X_(VSSr),%)存在线性关系X_(SCODr)=0.533 3 X_(VSSr)+43.411。预处理对污泥在厌氧消化阶段氨氮、磷酸根磷的影响也随含固率的增大而减小,含固率为1.5%的预处理泥氨氮、磷酸根磷浓度相较原泥增幅最大,依次增长了97.3%、166.0%。
[Abstract]:Under the condition of ultrasonic combined with hot alkali pretreatment, the characteristics of sludge reduction and cell substance release during anaerobic digestion were investigated. After pretreatment, the removal rate of volatile suspended solid (VSS) and dissolved COD ODD were higher than that of raw sludge, and the VSS removal rate was higher than that of raw sludge. The removal rate of SCOD decreased with the increase of solid content of sludge. There was a quantitative functional relationship between the removal rate of Scod and gas production. That is, YS / QY / T / T / T / T / S / S / S / S / S / S / S / S / S / S / S / S / S / S / S / S / S / S / S / S / S / S / S / S. At the same time, the removal rate of SCOD and VSS were compared. There is a linear relationship between X _ s _ O _ D _ 2O _ (0.533 ~ 3) and V _ (SSr) _ (43.411. ammonia nitrogen of sludge in anaerobic digestion stage is treated by pretreatment). The effect of phosphate was also decreased with the increase of solid content. The concentration of phosphoric acid in pretreatment mud with solid content of 1.5% was the biggest increase compared with that of raw mud, and the increase of phosphorus content was 97.3% and 166.0% respectively.
【作者单位】：华东师范大学生态与环境科学学院上海城市化过程与生态修复重点实验室;
【基金】：国家高技术研究发展计划(“863计划”)项目(No.2012AA063502)
【分类号】：X703
【正文快照】： 随着我国城市化进程的加快,污水处理设施高速发展,随之产生大量剩余污泥。我国污泥年产量即将突破3 000万t,2020年将在此基础上再翻一番[1]。污泥的处理以及最终处置设施费用昂贵,达污水处理厂总费用的50%~60%[2],因此探索污泥的减量化、资源化技术已成为当下的研究热点,其中

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