武汉工程大学环境与城市建设学院环境工程毕业设计华中某城市污水处理厂初步设计ApreliminarydesignofasewagetreatmentplantinthemiddleofChina摘要此次污水处理厂的初步设计，是以长沙市第一污水处理厂的水质条件、地质条件、地理气象条件为基础设计的。鉴于本次设计的水量为20万吨/天，选择如下的处理程序。首先是物理处理，通过提升泵房的一次提升，然后再经过中格栅、细格栅，接着是生物处理，在对各工艺进行技术可行性、经济合理性、应用广泛、管理科学方便的综合比较之后，选择了经济可行、管理方便的A/A/O法。在平面布局上，厂前区布置在西北向，生产区布置在东南向，具体布局见平面布局图。关键字：污水处理厂；长沙；物理处理；生物处理；A/A/O法AbstractThepreliminarydesignofthesewagetreatmentplant,thesampleofwhichishewaterqualityconditions,geologicalconditions,weatherandgeographicalconditionsinChangshaFirstSewageTreatmentPlant.Giventhequantityofthisdesignis200,000tonsperday,wechoosethefollowingprocess.Thefirstisthephysicaltreatment,thewatergothoughthemiddlegrille,thesmallgrille,andthenisupgradedinthepumpingstation.Followedisthebiologicaltreatment,afteraseriesofcomparisonintechnicalfeasibility,economicrationalityoftheextensiveapplication,scienceandfacilitateinmanagement,weuseaviableeconomic,flexibleprocessnamedAnaerobic-Anoxic-Oxic.Intheplanelayout,theformerfactorydistrictsareinthenortheast,whiletheproductionareasareinthesouthwest.Forthedetails,pleasehavealookatthespecificflatlayout.Keyword:thesewagetreatmentplant；Changsha；thephysicaltreatment；thebiologicaltreatment,；Anaerobic-Anoxic-Oxic目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc327179716"摘要PAGEREF_Toc327179716\hIHYPERLINK\l"_Toc327179717"AbstractPAGEREF_Toc327179717\hIIHYPERLINK\l"_Toc327179718"目录PAGEREF_Toc327179718\hIIIHYPERLINK\l"_Toc327179719"第一章长沙市概述PAGEREF_Toc327179719\h1HYPERLINK\l"_Toc327179720"1.1设计依据与设计原则PAGEREF_Toc327179720\h1HYPERLINK\l"_Toc327179721"1.2城市概况PAGEREF_Toc327179721\h1HYPERLINK\l"_Toc327179722"1.3城市排污现状及污染简况PAGEREF_Toc327179722\h2HYPERLINK\l"_Toc327179723"1.4污水处理规模PAGEREF_Toc327179723\h2HYPERLINK\l"_Toc327179724"第二章污水处理厂工艺设计PAGEREF_Toc327179724\h4HYPERLINK\l"_Toc327179725"2.1处理厂地理位置PAGEREF_Toc327179725\h4HYPERLINK\l"_Toc327179726"2.2处理厂设计污水量PAGEREF_Toc327179726\h5HYPERLINK\l"_Toc327179