三废处理技术网      
首页 | 废气处理技术 | 废水处理技术 | 固废处理技术 | 环保图片 | 环保英语 | 三废处理图纸下载 | 三废处理资料库下载 | 环保电气控制 | 专题 | 会员中心 |
  当前位置:主页>环保英语>文章内容

水质污染与社会(中英对照)二

来源: 作者: 发布时间:2009-04-09  

Pathogens are another type of pollution that prove very harmful.  They can cause many illnesses that range from typhoid and dysentery to minor respiratory and skin diseases.  Pathogens include such organisms as bacteria, viruses, and protozoan.  These pollutants enter waterways through untreated sewage, storm drains, septic tanks, runoff from farms, and particularly boats that dump sewage.  Though microscopic, these pollutants have a tremendous effect evidenced by their ability to cause sickness.

污染的河流和溪涧的化学污染物已成为20世纪一个最严重的环境问题。水性化学污染进入河流和溪涧造成大量的破坏。

病原体是另一种类型的污染,证明十分有害的。这可能导致许多疾病,包括从伤寒和痢疾轻微呼吸和皮肤疾病。病原体包括生物体的细菌,病毒和原生动物。这些污染物进入水道通过未经处理的污水,雨水排水渠,化粪池,径流场,特别是船只倾倒污水。虽然微小,这些污染物的产生巨大的影响证明了他们的能力,导致疾病。

Three last forms of water pollution exist in the forms of petroleum, radioactive substances, and heat.  Petroleum often pollutes waterbodies in the form of oil, resulting from oil spills.  The previously mentioned Exxon Valdez is an example of this type of water pollution.  These large-scale accidental discharges of petroleum are an important cause of pollution along shore lines.  Besides the supertankers, off-shore drilling operations contribute a large share of pollution.  One estimate is that one ton of oil is spilled for every million tons of oil transported.  This is equal to about 0.0001 percent. Radioactive substances are produced in the form of waste from nuclear power plants, and from the industrial, medical, and scientific use of radioactive materials.  Specific forms of waste are uranium and thorium mining and refining.  The last form of water pollution is heat.  Heat is a pollutant because increased temperatures result in the deaths of many aquatic organisms.  These decreases in temperatures are caused when a discharge of cooling water by factories and power plants occurs.

三年过去形式的水体污染中存在形式的石油,放射性物质和热量。石油污染水体通常的形式,石油,造成石油泄漏。前面提到的埃克森瓦尔迪兹是一个例子,这种类型的水体污染。这些大规模的意外排放的石油是一个重要的原因,污染沿海岸线。除了supertankers ,近海钻井作业的贡献很大比例的污染。一个估计是,一吨石油泄漏,每100万吨石油运输。这是大约相当于0.0001百分之。放射性物质的生产形式的废物核电厂,并从工业,医疗和科学使用放射性材料。具体形式的废物,铀和钍的采矿和冶炼。最后形式的水体污染的热量。热是一种污染物,因为气温上升导致死亡,许多水生生物。这些跌幅温度时所造成的冷却水排放的工厂和电厂发生。

The major sources of water pollution can be classified as municipal, industrial, and agricultural.  Municipal water pollution consists of waste water from homes and commercial establishments.  For many years, the main goal of treating municipal wastewater was simply to reduce its content of suspended solids, oxygen-demanding materials, dissolved inorganic compounds, and harmful bacteria.  In recent years, however, more stress has been placed on improving means of disposal of the solid residues from the municipal treatment processes.  The basic methods of treating municipal wastewater fall into three stages: primary treatment, including grit removal, screening, grinding, and sedimentation; secondary treatment, which entails oxidation of dissolved organic matter by means of using biologically active sludge, which is then filtered off; and tertiary treatment, in which advanced biological methods of nitrogen removal and chemical and physical methods such as granular filtration and activated carbon absorption are employed.  The handling and disposal of solid residues can account for 25 to 50 percent of the capital and operational costs of a treatment plant.  The characteristics of industrial waste waters can differ considerably both within and among industries.  The impact of industrial discharges depends not only on their collective characteristics, such as biochemical oxygen demand and the amount of suspended solids, but also on their content of specific inorganic and organic substances. Three options are available in controlling industrial wastewater.  Control can take place at the point of generation in the plant; wastewater can be pretreated for discharge to municipal treatment sources; or wastewater can be treated completely at the plant and either reused or discharged directly into receiving waters.

水污染可分为市政,工业和农业。市政供水污染包括废水家园和商业机构。多年来,主要目标是处理城市 废水只是减少其内容的悬浮固体,氧要求的材料,溶解无机化合物和有害细菌。近年来,但是,更多的压力放在了改善的手段处置固体残留物由市政处理过程。基本方法的城市污水处理分为三个阶段:初级治疗,包括砂砾清除,筛选,粉碎,和沉淀;二级处理,这需要氧化溶解有机质的手段,利用生物活性污泥,然后驶离和处理,其中先进的生物脱氮方法和化学和物理方法,如颗粒过滤和活性炭吸收就业。处理和处置固体残渣可以 至百分之五十的资本开支和运营成本的污水处理厂。特征的工业废水可以相差很大内部和国家之间产业。影响工业排放不仅取决于其集体特征,如生化需氧量和悬浮固体量,而且还对它们的内容具体的无机和有机物质。.三个选项可在控制工业废水。管制可以在点的代工厂;废水预处理可以出院市政治疗来源;或废水处理完全可以在工厂,或者重复使用或直接排放到接收水域。

 
用户名: 新注册) 密码: 匿名评论
评论内容:(不能超过250字,需审核后才会公布,请自觉遵守互联网相关政策法规。
 §最新评论:
  热点文章
·环境污染〖中英文对照〗
·英文给排水论文
·英语翻译:含铬废水处理方案
·环境资源相关英语词汇
·环境工程专业术语
·环保英语范文
·Wastewater Treatment Methods
·水处理英语论文:Membrane Biore
·水质污染与社会(中英对照)一
·水中污染物来源及处理方法(英文
·电镀专业术语
·环保问题英语范文
  相关文章
·New regulations for wastewater
·STEENBRAS WATER TREATMENT PLAN
·英文给排水论文
·SAVE THE EARTH AND MONEY
·Water pollution FAQ Frequently
·水处理英语论文:Membrane Biore
·landfill waste management
·Tensile Fabric Spheres Launche
·Recycling Banks to Reduce Scav
·膜法处理造纸废水研究进展(中英
·聚合氯化铝的制备及其处理污水研
·环境工程专业术语
三废处理技术网 Email:nosea.net@gmail.com 苏ICP备11033652号-1