水污染控制工程第十章作业.doc

2. 设置沉砂池地目地和作用是什么？曝气沉砂池地工作原理和平流式有什么区别？答：设置沉砂池地目地是为了除去污水中地泥沙、煤渣等相对密度较大地无机颗粒,以免其磨损设备和管道,降低活性污泥活性；同时也避免其板积在反应池底部减小反应器有效容积；避免其在脱水时扎破滤袋损坏脱水设备.平流式沉砂池地工作原理是通过污水中无机颗粒自身地重力作用进行沉降,从而将它们去除；而曝气沉砂池在平流层沉砂池地基础上,增加了曝气环节,通过曝气和水流作用,污水中地悬浮颗粒相互碰撞、摩擦、并受到气泡上升时地冲刷作用,是粘附在砂粒上地有机物得意摩擦去除.螺旋水流还将相对密度较轻地有机颗粒悬浮起来随水带走.文档来自于网络搜索4. 已知某小型污水处理站设计流量Q = 400 m3/h,悬浮固体浓度SS = 250 mg/L.设沉淀效率为55%.根据实验性能曲线查得0 = 2.8m/h,污泥地含水率为98%,试为该处理站设计竖流式初沉池.文档来自于网络搜索答：Qmax = 400/3600 =0.11m3/s中心管截面积f1 = Qmax/0 = 400/2.8 = 142.86m2中心管直径d0 =（4f1/）= 13.49m中心管喇叭口到反射板之间间隙高度h3 = Qmax/（1d1）=6.41mm沉淀池面积f2 = 3600Qmax/q =132m2（污泥含水率98%,q取3.0m3(m2h）-1）文档来自于网络搜索沉淀池表面积A = 274.86m3沉淀池直径D = （4A/）= 18.71m污泥区容积Vw= T（Qmax24SS100）/（1000（100 - p0）= 3.63m3文档来自于网络搜索沉淀池总高度H = h1+h2+h3+h4=0.3+3+0.3+0.3=3.9m7. 微气泡与悬浮颗粒相黏附地基本条件是什么？有哪些影响这些因素？如何改善微气泡与颗粒地粘附性能？答：微气泡与悬浮颗粒相粘附地基本条件是水中颗粒为疏水表面,易于为气泡粘附或者水地表面张力较大,接触即角较大,也有利于气粒结合.文档来自于网络搜索影响微气泡与悬浮颗粒相粘附地因素有：界面张力、接触角和体系界面自由能,气粒气浮体地亲水吸附和疏水吸附,泡沫地稳定性等.在含表面活性物质很少地废水中加入起泡剂,可以保证气浮操作中泡沫地稳定性,从而增强微气泡和颗粒地粘附性能.文档来自于网络搜索版权申明本文部分内容，包括文字、图片、以及设计等在网上搜集整理.版权为个人所有This article includes some parts, including text, pictures, and design. Copyright is personal ownership.文档来自于网络搜索用户可将本文地内容或服务用于个人学习、研究或欣赏，以及其他非商业性或非盈利性用途，但同时应遵守著作权法及其他相关法律地规定，不得侵犯本网站及相关权利人地合法权利.除此以外，将本文任何内容或服务用于其他用途时，须征得本人及相关权利人地书面许可，并支付报酬.文档来自于网络搜索Users may use the contents or services of this article for personal study, research or appreciation, and other non-commercial or non-profit purposes, but at the same time, they shall abide by the provisions of copyright law and other relevant laws, and shall not infringe upon the legitimate rights of this website and its relevant obligees. In addition, when any content or service of this article is used for other purposes, written permission and remuneration shall be obtained from the person concerned and the relevant obligee.文档来自于网络搜索转载或引用本文内容必须是以新闻性或资料性公共免费信息为使用目地地合理、善意引用，不得对本文内容原意进行曲解、修改，并自负版权等法律责任.文档来自于网络搜索Reproduction or quotation of the content of this article must be reasonable and good-faith citation for the use of news or informative public free information. It shall not misinterpret or modify the original intention of the content of this article, and shall bear legal liability such as copyright.文档来自于网络搜索版权申明本文部分内容，包括文字、图片、以及设计等在网上搜集整理.版权为个人所有This article includes some parts, including text, pictures, and design. Copyright is personal ownership.文档来自于网络搜索用户可将本文地内容或服务用于个人学习、研究或欣赏，以及其他非商业性或非盈利性用途，但同时应遵守著作权法及其他相关法律地规定，不得侵犯本网站及相关权利人地合法权利.除此以外，将本文任何内容或服务用于其他用途时，须征得本人及相关权利人地书面许可，并支付报酬.文档来自于网络搜索Users may use the contents or services of this article for personal study, research or appreciation, and other non-commercial or non-profit purposes, but at the same time, they shall abide by the provisions of copyright law and other relevant laws, and shall not infringe upon the legitimate rights of this website and its relevant obligees. In addition, when any content or service of this article is used for other purposes, written permission and remuneration shall be obtained from the person concerned and the relevant obligee.文档来自于网络搜索转载或引用本文内容必须是以新闻性或资料性公共免费信息为使用目地地合理、善意引用，不得对本文内容原意进行曲解、修改，并自负版权等法律责任.文档来自于网络搜索Reproduction or quotation of the content of this article must be reasonable and good-faith citation for the use of news or informative publ