皂素生产废水后续处理方法的选择     

宋凤敏  葛红光 《华东地质学院学报》2007,30(3):291-293

用EM菌—活性污泥法和混凝法两种方法对经一次处理过的皂素生产废水进行二次处理,比较两种方法的处理效果。结果表明,在最佳条件下EM菌-活性污泥法对废水处理效果较好,最后出水可达排放标准;而混凝方法对废水处理的效果甚小,可以得出皂素生产废水不宜用混凝方法来预处理或后处理。  相似文献   

Experimental Study on Treatment of High-concentrated Sulfur Wastewater by Process of Depositing Natrojarosite and Its Environmental Significance          下载免费PDF全文

MA Shengfeng WANG Changqiu LU Anhuai GUO Yanjun HE Hongliao 《《地质学报》英文版》2007,81(2):330-334

High-concentrated sulfur wastewater with sodium and COD （chemical oxygen demand） up to 26000 mg/L from a chemical plant, Jiangsu Province of China has been treated by deposition of natrojarosite in lab. The results indicated that the COD of the wastewater was decreased sharply from 26000 mg/L to 1001 mg/L, with removal rate of COD up to 96% by twice precipitations of natrojarosite and twice oxidation of H202. The treated sulfur wastewater reached the requirement of subsequent biochemical treatment to water quality. The optimal operational parameters should be controlled on pH value between 2.50 and 3.20 and 50 g FeCly6H2O solid added in per liter wastewater. The study provided an experimental basis for pretreatment of high-concentrated sulfur wastewater and proposed a new mineralogical method on treatment of other wastewaters. Depositing process of jarosite and its analogs should be able to be used to treat wastewater from mine and other industries to remove S, Fe and other toxic and harmful elements, such as As, Cr, Hg, Pb, etc. in the water.  相似文献   

A decade of variation of COD in the Changjiang River （Yangtze River） and its variation trend analysis     

WANG Fushun WANG Yuchun ZHANG Jing 《中国地球化学学报》2007,26(4):366-373

The average annual value of COD (chemical oxygen demand) fluxes of the Changjiang River (Yangtze River) and its main tributaries in the past decade (i.e., 1991–2000), has been evaluated. Based on the data from the Datong Hydrological Station (DHS), it was found that the Dongting Lake drainage basin contributed the greatest water discharge (35.8%) and COD flux (48.3%) among the main tributary drainage basins, followed by the Poyang Lake drainage basin with the contributions of 15.4% and 19.3%,respectively. By the end of the year of 2000, COD flux in the Changjiang River rose by almost 45% relative to that in the year of 1991, reaching about 1941000 ton/a at DHS. Statistical analysis revealed that industrial wastewater discharge, as well as COD in it, was found decreasing in the same period, due to the gradual reinforcement of environmental management. Moreover, correlation analysis indicated that non-point pollution from agriculture and increasing discharge of domestic sewages caused by rapid growth of population along the Changjiang River drainage valley should be responsible for the high COD. Furthermore, with the current trend of population growth and agricultural development in this basin, water quality of the Changjiang River, in terms of COD level, is going to deteriorate in the near future. Thus, the rational applications of fertilizers and pesticides in agriculture and the proper treatment of domestic sewages before they are discharged would be the most concerned controlling parameters.  相似文献   

双台子河口水体有机碳分布特征研究   总被引：1，自引：0，他引：1  

于文涛  邹立  文梅  张亚昆 《中国海洋大学学报(自然科学版)》2015,45(2):101-108,126

于2011年5月和8月通过研究双台子河口水体溶解有机碳(DOC)、颗粒有机碳(POC)和化学耗氧量(COD)的分布特征,阐述双台子河口水体有机碳的河口过程及其影响因素,并探讨总有机碳(TOC)和COD表征河口有机污染的区域性和季节性特征。研究表明:2011年5月双台子河口DOC、POC和COD含量范围分别为4.04~5.06mg/L(平均4.60mg/L)、2.93~10.85mg/L(平均7.01mg/L)和5.65~14.07mg/L(平均9.04mg/L);8月分别为10.87~46.04mg/L(平均26.75mg/L)、0.88~17.27mg/L(平均4.16mg/L)和2.42~67.62mg/L(平均17.85mg/L)。DOC、POC和COD的含量由河到海总体呈现逐渐降低的趋势,双台子河口不同区段DOC、POC和COD的时空分布,及其主要和次要影响因素具有一定的差别。有机碳来源和海水的稀释作用是影响双台子河口有机碳分布的主要因素,现场生物生产和悬浮颗粒物影响较小。双台子河口水体中TOC和COD呈现线性不显著正相关关系,二者关系的季节差异显著。  相似文献   

Chemical oxygen demand of seawater determined with a microwave heating method     

LIULi JIHongwei LIUYing XINHuizhen 《中国海洋大学学报(英文版)》2005,4(2):152-156

This paper investigates a microwave heating method for the determination of chemical oxygen demand (COD) in seawater. The influences of microwave-power, heating time and standard substances on the results are studied. Using the proposed method, we analyzed the glucose standard solution, the coefficient of variation being less than 2%. Compared with the traditional electric stove heating method, the results of F-test and T-test showed that there was no significant difference between the two methods, but the microwave method had slightly higher precision and reproducibility than the electric stove method. With the microwave heating method, several seawater samples from Jiaozhou Bay and the South Yellow Sea were also analyzed. The recovery was between 97.5% and 104.3%. This new method has the advantages of shortening the heating time, improving the working efficiency and having simple operation and therefore can be used to analyze the COD in seawater.  相似文献   

潮汐流动中污染物排放的一种远区计算模型   总被引：7，自引：0，他引：7  

顾杰  匡翠萍 《海洋工程》1996,(1)

本文建立了一个适合于潮汐流动中污染物排放的远区动态平面二维数值计算模型。该模型的计算特点是将流场和浓度场分开计算，即所谓“非耦合解”，运用有限节点法计算了流场，用改进的有限节点法计算了浓度场。该模型应用于长江大厂镇江段，其计算出的流场和该江段典型污染物Ｆ－的浓度场与实测一致，在此基础上，用设计潮计算了一个污水排江方案，确定了其影响范围  相似文献   

晋江河口水域中COD自净特征及其成因分析   总被引：1，自引：0，他引：1  

王人骏 《台湾海峡》1996,15(1):48-53

利用连续１１ａ的水质监测资料和其他有关的监测、调查资料，研究晋江河口水域中ＣＯＤ的短期和长期自净特征，得出盐度梯度是该特征的主要因素等结论。河口水域的这一特征在区域水环境研究方向具有十分重要的意义。  相似文献   

渤海COD与石油烃环境容量计算   总被引：7，自引：0，他引：7  

郭良波  江文胜  李凤岐  王修林 《中国海洋大学学报(自然科学版)》2007,37(2):310-316

总结评述海洋环境容量计算的3类方法,分析了它们的适用条件和不足之处,并对最优化法加以改进计算了渤海的环境容量。然后用HAMSOM模式模拟了渤海的流场,用SPM模式模拟了渤海的浓度场,计算了渤海的COD和石油烃环境容量。渤海在Ⅰ~Ⅳ类海水水质标准下的COD环境容量分别为36.59×104t/a,54.88×104t/a,73.13×104t/a和91.45×104t/a;在Ⅰ~Ⅳ类海水水质标准下的石油烃环境容量分别为2.82×104t/a,16.86×104t/a和28.17×104t/a。  相似文献   

太湖水体有机污染与主要环境因子的响应   总被引：5，自引：1，他引：5  

范成新  袁静秀  叶祖德 《海洋与湖沼》1995,26(1):13-20

根据１９８７－１９８８年有关研究资料，分析太湖ＣＯＤ，ＢＯＤ５和ＴＯＮ的时空变化及其与ＴＯＣ的关系，研究ＣＯＤ出入湖量和水文气象因子对湖体ＣＯＤ的影响。结果表明，ＣＯＤ是太湖有机污染的重要指标；在不同时期和湖区，其含量差异明显，丰水期低，枯水期高。各湖区污染排列为：五里湖＞梅梁湖＞湖心区＞东太湖。进入太湖有机物量的增减，是ＣＯＤ在湖体中消长的主导因素，但水位和温度等条件因子对有机污染程度亦有重要曩  相似文献   

罗源湾区域入海非点源污染COD排放量估算   总被引：2，自引：0，他引：2  

林志兰  余兴光  刘希  陈彬 《台湾海峡》2006,25(2):209-215

根据汇水流向,借助GIS进行罗源湾汇水区的划分;在ENVI软件下利用遥感分析技术提取土地利用类型;结合研究区域内主要溪流的水质监测结果和土地利用现状,利用反推法计算出农田污染单位面积COD负荷.在此基础上,采用排污系数法和单位面积污染负荷法分别计算出各汇水区农村生活污水、畜禽养殖、农田和村镇建设用地降雨径流的COD排放量.结果表明罗源湾入海非点源污染COD总排量为11 446.44t/a,其中农村生活污水的COD排放量最大,约占38.9%,其次是畜禽养殖、农田和村镇建设用地降雨径流污染.最后提出非点源污染控制的建议.  相似文献