A study on factors influencing kinetic threshold concentration of organics biodegradation

来源 :全国水体污染控制、生态修复技术与水环境保护的生态补偿建设交流研讨会 | 被引量 : 0次 | 上传用户:baotong1029
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Threshold concentration (Smin)is termed the minimum substrate concentration of biodegradation oforganic pollutants,which is significant in the removal of trace organic compounds for these compounds can not beeliminated from environment effectively by traditional biological techniques. But the value of Smin is not constant,and is influenced by many factors,such as the characteristic of organic matter,species of microorganism,environment condition and biodegradation pathway. Several factors influencing Smin were studied in this paper,including substrate concentration,organism culture mode,and additional carbon source. The results indicated thatthe lower the substrate concentration is,the lower the Smin value is,and vice versa. The Smin value of continuousculture is lower than that of batch culture,and the former is more suitable to enrich organism degrading traceorganic compounds. The else carbon source (glucose)weakens the affinity of ceils for catabolic objectivecompounds,which is disadvantage to reach lower Smin value.
其他文献
通过国外生活垃圾填埋产生沼气后进行利用的现状分析,介绍了生活垃圾填埋产生沼气的危害及回收的必要性,结合辽阳市垃圾填埋场的贮量情况对产生的沼气进行分析、预测、提出沼气回收利用的对策。
分析并总结了目前我国的资源、环境状况与经济增长之间三者的必然联系,提出了发展循环经济,保护生态环境,加快建设资源节约型、环境友好型社会,促进经济发展与人口、资源、环境相协调的发展路线。
本文对乡镇企业在可持续发展方面所面临的一系列问题进行了阐述,并对乡镇企业可持续发展的问题提出了对策。
对传统型地渗系统采取上下分层布水、人工强制通风进行改进,2005—2007的连续性运行的结果表明,水力停留时间(HRT)15~20h、上下层进水量比例为1:3、处理污水负荷为0.8m3/h的情况下,与传统方式相比同时采用强制通风和上下分流对COD、TP和TN的去除率分别由58.9%、60%和31%分别提高到80%、92.5%和48.8%,系统土壤内微生物硝化菌、亚硝化菌、反硝化菌和聚磷菌的数量都高
Phosphorus loadings in sediments play an important role in lake eutrophication and the progress ofits recovery. The phosphorus release is controlled by physical,chemical and biological mechanisms. Alk
由于一般城市公园水景大多没有按自然水理设计,其内部组构不合理,不久水体就会变得浑浊不堪甚至发黑变臭,严重影响水景的美观,所以目前大多水景已完全没有自然中的那种美丽生动的景观。在多年多学科交叉研究和实践的基础上,我们提出了景观水体的根本解决方法——nars自然水景系统(natural aquascape restoration system),从引起水污染的成因——即水体富营养化生成机制进行分析和研
应用高效液相色谱,对北方某水库5个采样点的3种微囊藻毒素(MC-LR、RR和YR)进行了为期1a的监测,研究了微囊藻毒素(Microcystins,MCs)随时间的变化规律,并探讨了环境因子对MCs产生的影响。结果表明,MC-YR和MC-LR在8,9月份出现高峰值,而MC-RR在10,11月份达到全年的最大值。8月份之前,水体中MC-LR含量最高,MC-RR次之,MC-YR最小;而8月份之后,水体
Soil samples with both of vadose zone and aquiferwere collected from two recharge sites:theWater Campus Project (WCP)at Scottsdale and theIsland Wastewater Treatment Plant (IWWTP)at LakeHavasuCity,Ari
Predicting the plant water quality parameters using conventional experimental techniques is a timeconsuming step and is also an obstacle in the way of efficient control of such processes. In this work
改良序批式活性污泥法处理污水主要是一个好氧过程,需氧量与有机物的降解有关。反应池内溶解氧(DO)的变化取决于进水的浓度、曝气量、污泥浓度等因素。试验研究表明,进水浓度高,需氧量大,反应时间长;供气量大,有机物降解快,反应时间短。而以上污水处理过程的特征都可以由反应池中DO的变化来反映,采用DO的在线检测来作为MSBR的污水处理过程和终点控制参数是可行的。