摘要
文章为考察膜生物反应器微生物在贫营养条件下,溶解性微生物产物(SMP)的产出规律和特性,为优化MBR反应器的运行、延缓膜污染提供理论依据。对天津大学游泳馆MBR系统中的污泥混合液进行贫营养实验。研究表明贫营养条件下SMP产出可以分为两个阶段:EPS溶解产生SMP阶段和死亡细胞胞内物质溶出产生SMP阶段。伴随营养物质的匮乏,SMP中大分子物质所占比例显著增加,从第3天的20.2%(占TOC总量的比例),到第8天上升为39.2%,从而会加剧膜污染,并且不同阶段产生的SMP都可以刺激微生物提高对基质的降解速率,SMP浓度与污泥的比好氧速率呈正相关关系。
In order to investigate the regularity and characteristics of the product of SMP under nutrient deficiency,and to provide theoretical basis for optimizing MBR reactor＇s operation and lessening membrane fouling, this research is done under the oligotrophic environment using the sludge from the MBR of Tianjin University. Results show that production of SMP could be divided into two stages under nutrient deficiency including dissolved of EPS produced SMP and splited of dead cell proucted SMP.Accompanied by nutrient deficiency, SMP of macromolecular material has a significant increase in the proportion. From the third day of 20.2% （the proportion of the total TOC）, the eighth day rose to 39.2%, which would aggravate membrane fouling, and SMP produce in different stages can stimulate the microorganisms to increase the rate of degradation of the substrate.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2010年第2期52-56,共5页
Environmental Science & Technology
基金
天津市应用基础研究计划项目(07JCZDJC02100)
