污泥中挥发性脂肪酸对聚磷菌厌氧释磷的作用及其产量的影响因素  

Effect of Volatile Fatty Acids on Anaerobic Phosphorus Release from Sludge and Its Influencing Factors

作　　者：郝建昭 郭振茂 穆德源 王跃宇 张江南 Hao Jianzhao;Guo Zhenmao;Mu Deyuan;Wang Yueyu;Zhang Jiangnan(School of Environment and Resources,Taiyuan University of Science and Technology,Taiyuan 030024;College of Civil Engineering,Taiyuan University of Technology,Taiyuan 030002,China)

机构地区：[1]太原科技大学环境与资源学院,山西太原030024 [2]太原理工大学土木工程学院,山西太原030002

出　　处：《广东化工》2023年第10期18-20,17,共4页Guangdong Chemical Industry

基　　金：国家级大学生创新创业训练计划(20221010915);山西省中央引导地方科技发展资金项目(TDZJSX2022A051)。

摘　　要：随着我国经济的发展与人口的增长,用水量日益增加,因此城镇污水处理厂中产生的剩余污泥量也随之增加,但污泥中的磷元素却得不到有效的回收利用。若将挥发性脂肪酸对聚磷菌厌氧释磷的诱导作用与污泥水解酸化两个过程进行结合,可实现磷的更高效回收。本文深入研究了挥发性脂肪酸对聚磷菌厌氧释磷的诱导作用,并研究了污泥厌氧发酵过程中产生挥发性脂肪酸的影响因素。结果表明:强化厌氧释磷的最适碳源(乙酸钠)浓度为200 mg/L(在室温、弱碱性条件下)。不同预处理方式对污泥的发酵产酸效果有着不同程度的提高,实验测得碱处理效果最好,热处理次之,酸处理效果最差。上述结果对探索污泥中磷元素的高效回收工艺具有重要意义。With the development of economy and the growth of population of our country,the water consumption is increasing day by day,so the amount of surplus sludge in sewage treatment plants increases with it,but the phosphorus element in sludge cannot be recycled effectively.If the induction effect of volatile fatty acids on the anaerobic release of phosphorus from phosphorus accumulating bacteria is combined with the two processes of sludge hydrolysis and acidification,phosphorus recovery can be achieved more efficiently.In view of this,the induction of volatile fatty acids on the anaerobic release of phosphorus from phosphorus-accumulating bacteria and the influencing factors of the production of volatile fatty acids during the anaerobic fermentation of sludge were studied in this paper.The results showed that the optimum concentration of carbon source(sodium acetate)was 200 mg/L(at room temperature and weak alkaline condition).Different pretreatment methods have different degrees of improvement on the acid production effect of sludge fermentation.The experimental results show that the alkali treatment has the best effect,followed by heat treatment,and acid treatment has the worst effect.The above results are of great significance to explore the efficient recovery process of phosphorus from sludge.

关 键 词：剩余污泥 磷元素回收 污泥处理 厌氧释磷 挥发性脂肪酸 

分 类 号：X703[环境科学与工程—环境工程]