专业英语作业答案

答案

Part I

Water Supply and Drainage Engineering offers a particular challenge because almost every process of wastewater treatment that is designed and built by engineers is unique. 给排水工程提出了特殊的挑战，因为由工程师设计建造的每个废水处理工艺几乎都是唯一的。 Be strict to the examination and approval of the new projects in Huaihe River basin, and carry out the environment influence assessment system. The projects which are not in accord with the Tenth-Five year plan should not be approved. 严格淮河流域新建项目的审批，实行环境影响评价制度，不符合十五淮河流域水污染防治工作计划的一律不得审批。 Once a project has been identified, the next step is a preliminary or feasibility study to consider in detail the implementation of alternatives, together with approximate costs. For example, water system study alternatives for a region might include：(1) possible service areas and combinations; (2) a well-water supply with water softening and iron removal; (3) an upland lake or reservoir with multipurpose uses requiring land question, water rights, and a conventional water treatment plant. 确定项目后首先需开展的工作是进行前期和可行性研究，其内容包括考虑实施备选方案的各个环节和估算大致的费用。例如，对某一地区水系统的去研究包括：（1）可能的服务范围及单位；（2）配有水质软化和除铁系统的水井供水系统；（3）需通过征地获取的一个高位湖泊或水库，水的使用权及一个常规水处理厂。 The geographic location of some heavily populated cities, such as Los Angeles and Mexico City, makes them particularly susceptible to frequent air stagnation and pollution. 像人口非常稠密的洛杉矶和墨西哥城这样地理位置的城市，特别易受空气流动停滞和污染物增加的影响。 Theoretically, devolatilized tar, being hydrophobic, remains on the local surface in the pressured aqueous environment, producing a uniform coating that seals the micro porous limits moisture reapportion。 理论上，经脱挥发酚作用得到的焦油是疏水的，在高压的液相中仍然留在煤的表面，形成一层均匀的油膜，从而封住了煤中的微孔，所以减少了煤对水分的重新吸收。 The end-products, i.e., alcohols and acids, from those reactions will enter the microorganism and be metabolized by oxidation reaction catalyzed by endo-enzymes. 通过这些反应，最终产品即乙醇和酸进入微生物体内并经胞内酶催化剂氧

化而代谢。

答案

Only through interaction between industry, scientists, and government regulators will true solutions be finally realized. 只有通过工业界、科学家和政府部门的共同努力，才能最终得到解决。 The equipment employed in the commercial test is shown schematically in Fig.5. 本次工业试验中所用设备的简图如图5所示。 The experiment is an absolute necessity in determining the best sludge recycle ratio. 对确定最佳污泥回流比而言，这次实验是绝对必要的 Scientific researchers have made a careful study of characteristics of these activated sludge. 科研人员仔细地研究了这些活性污泥的特性。 The test results are in good agreement with those obtained by theoretical deduction. 实验结果与理论推导完全一致。 Dust and other particles matter in the air provide nuclei around which condensation takes place, forming droplet and thereby playing a role in snowfall and rainfall patterns. 在空气中以尘粒和其他颗粒物为核心发生了水滴的凝聚，进而对降雪和降雨的发生起到了一定的作用。 Also there has been a concreted effort to modernize and increase space, facilities, equipment, and supporting materials used in science teaching. 而且，大家协同努力，从而扩大了场地、发展了机构、增添了设备和科学教育用的辅助材料，并使之现代化。 They are quite content with the data obtained from the experiment. 他们对试验中（获得）的数据非常满意。 If there are no heat-treatment, meals can not be made so hard. （如果）没有热处理，金属就不会变得如此坚硬。 Different kinds of matter have different properties. 不同（种类）物质具有不同的特性。 Whatever the approach, it must be remembered that energy is required to lift water or to pump it through a filter. 无论采用哪种方法，必须记住，提升水或用泵将水输送通过滤床都需要能

量。

答案

It is believed that the automobile is blamed for such problems as urban area expansion and wasteful land use, congestion and slum conditions in the central areas, and air and noise pollution. 有人认为汽车造成一系列问题，如城市膨胀、土地浪费、市区拥挤、油污遍地以及空气和噪声污染等。 The main premise underlying pollution prevention is that it makes far more sense for a generator not to produce waste than to develop extensive treatment schemes to ensure that the waste poses no threat to the quality of the environment. 污染治理的根本前提是，是污染的生产者不再产生污染物要比制定详尽的、防止废弃物降低环境质量的质量计划有意义得多。 To meet these new requirements, many of the existing secondary treatment facilities will have to be retrofitted and new advanced wastewater-treatment facilities will have to be constructed. 为了满足这些新的需要，必须要更新现有的许多二级处理设施，同时必须

建造一些新的高级废水处理设施。

水解酸化—SBR工艺处理果汁废水的研究

摘 要：采用水解酸化-SBR工艺，对浓缩果汁生产废水处理进行了试验研究。结果表明：当进水COD浓度为3500~5000 mg/L， pH为6.5~7.5，在水解酸化池水力停留时间为8 h，SBR反应池MLSS浓度为3500~4 000 mg/L，进水15min，曝气7h，沉淀1 h，出水15min的条件下，出水COD去除率保持在97%以上， SS去除率达93%以上。且以水解酸化作为预处理单元可去除果汁废水中的SS达78%以上，为后续SBR工艺的稳定运行创造有利条件，提高组合工艺的整体效果。

关键词： 果汁废水 水解酸化 SBR COD SS

Study on treatment of syrup wastewater with hydrolysis

acidification-SBR technology

Abstract：An experimental study on syrup wastewater treatment with hydrolysis acidification-SBR technology was carried o …… 此处隐藏：7024字，全部文档内容请下载后查看。喜欢就下载吧 ……