太湖微污染水中生物可降解有机碳的特点分析  

Characteristics of Biodegradable Dissolved Organic Carbon in Taihu Lake

作　　者：杜嘉丹[1,2] 董秉直[2] DU Jia-dan;DONG Bing-zhi(China Academy of Urban Planning ＆ Design, Beijing 100044, China;College of Environmental Science and Engineering, Tongfi University, Shanghai 200092, China)

机构地区：[1]中国城市规划设计研究院,北京100044 [2]同济大学环境科学与工程学院,上海200092

出　　处：《中国给水排水》2018年第13期43-47,共5页China Water & Wastewater

摘　　要：采用活性生物砂静态培养法分析了生物可降解有机碳的组成及溶解性有机物在生物降解过程中的变化规律。结果表明,生物降解10 d后溶解性有机碳(DOC)基本达到稳定。其中,生物可降解有机碳(BDOC)中小分子有机物占81.35%、中分子有机物占13.25%、大分子生物聚合物占5.4%,系统优先降解大分子和小分子有机物。BDOC主要为荧光B区域的芳香族蛋白质类有机物,细菌生长过程中释放的溶解性产物为荧光A区和C区的腐殖酸类有机物,主要为含有苯环、羧基、醇羟基或共轭双键的不饱和有机物。The dynamic patterns of the composition of biodegradable organic carbon and dissolved organics in the process of biodegradation in Taihu Lake were investigated using the biological sand biodeg- radation method. The results showed that DOC reached stability after 10 days. The molecular weight range of BDOC consisted of 81.35% low molecular weight matter （ LMW）, 13.25% moderate molecular weight matter （MMW） , and 5.4% biopolymers （BP）. The biodegradation was first seen on LMW and BP. BDOC were mainly aromatic protein which reflected in fluorescent area B. Soluble microbial prod- ucts were mainly humic acids, which reflected in fluorescent area A and C, including benzene, carboxyl, alcohol hydroxyl or conjugated double bonds unsaturated organic matter.

关 键 词：太湖水 生物可降解有机碳 活性生物砂静态培养法 分子质量 生物降解 溶解性有机物 

分 类 号：TU991[建筑科学—市政工程]