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1)  biological removal of iron and manganese
生物除铁除锰
1.
The anthracite used as filter material in water plant for biological removal of iron and manganese has been studied and practiced through production practices.
目的通过生产实践,进行了无烟煤作为在生物除铁除锰水厂滤料的研究与应用。
2)  biological manganese removal
生物除锰
1.
By means of bench-scale test, study was made on the effect of factors such as )DO), pH and filter shutdown on biological manganese removal from ground water, and an investigation was also carried out on the relationship between oxidation reduction potential (ORP) and biological manganese removal.
 通过小试研究了DO、pH值和滤柱关闭等因素对地下水生物除锰的影响,探讨了氧化还原电位(ORP)与生物除锰的关系。
2.
Mechanism of biological manganese removal and some removal system including single-stage/multi-stage system with biofilter as core technique,hybrid MF/UF hollow fiber membrane system and constructed wetlands for mine drainage disposal were introduced.
文章简要阐述了生物除锰的机理,重点介绍生物除锰的工艺流程和应用,包括以生物滤池为核心的单极/多级工艺、复合MF/UF中空纤维膜工艺以及用于处理矿山废水的人工湿地工艺;同时介绍了国内外生物除锰的研究动态,如:同时去除NH4+、Fe、Mn的研究、生物滤池运行模式的研究等。
3.
The isolation of MSB-4 provides the powerful technical support for the construction of highly effective filter for biological manganese removal,and for the fast startup of water treatment plants with biological removal of iron and manganese.
该工程菌株的获得将为高效生物除锰滤池的构建,及生物除铁除锰水厂的快速启动提供有力的技术支持。
3)  removal of iron and manganese
除铁除锰
1.
Study on development of technology on removal of iron and manganese from groundwater;
地下水除铁除锰技术研究
2.
Effects of dissolved oxygen in water on the removal of iron and manganese by biofilter for groudwater with ammonia nitrogen
溶解氧对含氨氮地下水生物除铁除锰效果的影响
4)  iron and manganese removal
除铁除锰
1.
Study on backwashing of bio-filter bed of iron and manganese removal in steady running period;
生物除铁除锰滤池稳定运行阶段反冲洗研究
2.
Through immobilizing the isolated Leptothrix bacteria on manganese sand and quartz sand,the iron and manganese removal efficiency by the biologically immobilized filtration columns were studied.
通过在锰砂及石英砂上固定自行分离的纤发菌属细菌,研究了生物固定化锰砂及石英砂滤柱的除铁除锰能力。
3.
Five strains of iron and manganese removal bacteria were obtained from the biological film,which fell-off from mature filter bed and were incubated into culture media containing iron and manganese by repeatedly domestication.
从除铁除锰滤池中的成熟滤砂洗脱下滤膜,以铁锰细菌的选择性培养基进行分离纯化,共培养出5株铁锰降解菌。
5)  biological fixation and removal of manganese
生物固锰除锰
1.
The project was designed according to the theory of biological fixation and removal of manganese.
以生物固锰除锰理论为指导 ,设计了弱曝气一级过滤生物除铁除锰简缩流程。
6)  biological removal of iron
生物除铁
1.
Methods for removing iron and manganese from groundwater and development thereof are present-ed,with stress put on discussing the biological removal of iron and manganese introduced in recent years as well as the differences between it and the conventional ways.
介绍了地下水除铁除锰的方法及发展,重点讨论了近年来提出的生物除铁除锰观点及其与传统除铁除锰理论的不同之处,并根据笔者在洞庭湖区的试验成果分析了生物除铁除锰理论的疑点,认为微生物除铁作用很小,生物除锰的作用是存在的,但其机理还有待深入研究。
补充资料:除涝效益
      治理涝灾的措施(见除涝)与未采取这些措施相比较,所能取得的经济效益、社会效益和环境效益的总称。除涝效益一般用可减免的涝灾造成的损失表示,由于各年的涝灾损失不同,采取措施后各年所取得的效益也不相同。
  
  经济效益  通常用可减免的经济损失表示,主要有:①减免农、林、牧、副等用地因涝灾减产失收造成的经济损失;②减免城乡工矿企业、经济设施等受涝停业、减产、停运的经济损失;③减免城乡居民住房和财产受涝的损失;④减免公共设施及其他损失。涝灾损失与降水特性、发生的季节等因素有关。一般可根据调查或参照类似地区的涝灾和损失资料,分析各种类型的降水、不同季节的积涝水深、积涝历时与造成的各项损失的关系,然后根据涝区历年的降水资料,分析估算有、无除涝工程设施的涝灾损失,两者之差为除涝工程设施可减免的损失,亦即经济效益。除涝效益各年变化很大,通常采用有代表性的系列资料计算,其多年平均效益也可根据有、无除涝措施的涝灾损失频率曲线,采用频率加权法计算。
  
  社会效益  主要是:①避免因涝灾农业减产失收,造成供应紧张,影响正常生活,引起社会秩序混乱;②免除涝灾,有利各业的发展,社会的进步等。
  
  环境效益  主要有:①避免水盐状况恶化,引起土壤沼泽化和次生盐碱化;②避免积涝造成水质和卫生条件恶化,引起疫病流行;③减免林、草等因长期浸泡死亡,恶化生态环境等。
  

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