海水浓度对生物接触氧化法处理废水的影响     

王娟  范迪 《海洋科学》2004,28(3):9-11

研究了海水浓度对生物接触氧化法处理废水的影响。结果表明,在淡水中添加海水超过35％时,生物接触氧化法去除废水的化学耗氧量(COD)的效果随着海水浓度的增加而降低．添加海水10％～25％时,COD的去除效果好,25％时COD最高总去除率可达87．8％．处理效果几乎与纯淡水的对照组(COD总去除率88．6％)等同。  相似文献   

Phycoremediation of Hazardous Mixed Industrial Effluent by a Marine Strain of Phormidium sp     

Naseera Kottangodan  Cindrella Das  Anirudh Ram  Ram Murti Meena  Nagappa Ramaiah 《洁净——土壤、空气、水》2019,47(6)

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Re-Suspension Technique for Improving Organic Rich Sediment-Water Quality in a Shallow Sea Area     

Masaharu Fukue  Koji Uehara  Yoshio Sato  Catherine Mulligan 《Marine Georesources & Geotechnology》2013,31(3):222-233

The re-suspension method consists of (1) dispersion of the sediment by air-water jets, (2) pumping of the suspension (small particles and organic matter), (3) settlement in a tank, (4) filtration and (5) disposal of solids (followed by incineration in this case). The pilot test was performed to clean up an area of 3000 m². The dispersed depth of the bottom was approximately 50 cm. The time spent for the work was two weeks. The amount of re-suspended solid removed from the bottom was about 8 tonnes in dry mass. Since the solids contain high concentrations of chemical oxygen demand (COD), total phosphorous (T-P), total nitrogen (T-N) and sulfides, the remaining sediment was considerably improved. Quantitative analyses showed that the full-scale implementation would enable the removal of about 10% of the re-suspended solids, and reduce COD by 95%, T-P by 50%, T-N by 100% and sulfide by 75% for re-deposited sediments in comparison to the original sediments.  相似文献   

Pretreatment of Olive Oil Mill Wastewater by Two Different Applications of Fenton Oxidation Processes     

Celalettin Özdemir  Hayrunnisa Tezcan  Serkan Sahinkaya  Erkan Kalipci 《洁净——土壤、空气、水》2010,38(12):1152-1158

The removal of chemical oxygen demand (COD) and phenol from olive oil mill wastewaters (OOMW) was investigated experimentally by using conventional Fenton (CFP) and Fenton type processes (FTP) with zero valent iron (ZVI). Different operational parameters such as initial pH, Fe²⁺, Fe⁰, and H₂O₂ concentrations were examined. Kinetic studies in terms of COD and phenol removals for both CFP and FTP were performed. The original pH value (4.6) of OOMW for CFP was found as the optimum pH. The determined optimum conditions are [Fe²⁺] = 1500 mg L^?1, [H₂O₂] = 1750 mg L^?1, and pH = 4.6 for CFP; [Fe⁰] = 2000 mg L^?1, [H₂O₂] = 2000 mg L^?1, and pH = 3 for FTP. 82.4% COD and 62% phenol removals were performed under the optimum conditions by CFP, while 82% COD and 63.4% phenol were removed by FTP. According to the results of kinetic studies, it was observed that COD and phenol were removed by FTP more rapidly, compared to CFP. Consequently, it was determined that both CFP and FTP were effective processes for the pretreatment of OOMW.  相似文献   

Chemical Oxygen Demand Removal in Na2SO4 Saturated Wastewater by Cultivable Halotolerant Bacterial Community          下载免费PDF全文

Wen Wu Zhang  Jie Pan  Peng Ying Hao  Gang Zhen  Zhen Li Zhang  Min Wu 《洁净——土壤、空气、水》2016,44(6):593-598

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应用CDOM光学特性估算水体COD——以辽宁省盘锦市双台子河和辽东湾为例   总被引：4，自引：3，他引：1  

黄妙芬  宋庆君  毛志华  邢旭峰  白贞爱  古平  赵祖龙 《海洋学报》2011,33(3):47-54

有色可溶性有机物(chromophoric dissolved organic matter,CDOM)是水体中一类重要的光吸收物质,在水色遥感中,其光学特性主要以440 nm处的吸收系数和光谱斜率来表征,利用这些光学特性进行水环境要素遥感反演具有较广泛的应用前景.化学需氧量(chemical oxygen deman...  相似文献   

Environmental capacity of chemical oxygen demand in the Bohai Sea: modeling and calculation     

赵喜喜  王修林  石晓勇  李克强  丁东生 《中国海洋湖沼学报》2011,29(1):46-52

A three-dimensional advection-diffusion model coupled with the degradation process is established for describing the transport of chemical oxygen demand (COD). Comparison of the simulated distribution of COD at the surface in the Bohai Sea in August, 2001 with field observations, shows that the model simulates the dataset reasonably well. The Laizhou Bay, Bohai Bay, and Liaodong Bay were contaminated heavily near shore. Based on the optimal discharge flux method, the Environmental Capacity (EC) and allocate...  相似文献   

河南省环境污染的区域差异研究     

王丽萍 《地域研究与开发》2011,30(6):74-78

从"十一五"期间河南省各地区主要污染物排放的实际情况来看,各地区降污减排效果差距明显,环境污染的区域差异问题越来越成为影响河南省和谐社会建设和工业化进程的重要障碍。主要选取了极差、加权变异系数和锡尔熵3个指标,对河南省2006—2009年间的主要污染物排放情况进行了地区差异度分析,旨在为政府制定更加合理的节能指标和部署减排任务提供科学的决策参考。  相似文献   

对虾病毒病与化学需氧量相关关系研究   总被引：19，自引：0，他引：19  

马建新  刘爱英  宋爱芹 《海洋科学》2002,26(3):68-71

通过对虾池内主要环境因子与对虾病毒病相关关系的研究,发现虾池内化学需氧量（COD）太高是诱发对虾病毒病暴发流行的主要环境因子之一。利用多级S型净化池可以大幅度消除水体中的COD,有效预防对虾病毒病的暴发流行。  相似文献   

烟台、威海南部近岸海域物理自净能力研究——Ⅲ.COD浓度平流——扩散模型及预测     

田晖  郑连运  石磊 《中国海洋大学学报(自然科学版)》1994,(Z1)

采用三角形网格的分布杂交法,以变边界模型建立起威海及烟台南部近岸海域纯潮作用下的COD浓度平流——扩散模型。计算出烟台、威海南部近岸海域COD浓度分布现状并绐出各污染源的最大允许排放量,并对未来状况浓度分布作出了预测。  相似文献