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《A2-O法处理10000m3-d生活污水工艺设计》篇一A2-O法处理10000m3-d生活污水工艺设计一、引言随着城市化进程的加快，生活污水的排放量日益增加，给环境带来了严重的污染问题。
为了有效处理生活污水，保障环境卫生和人民健康，本设计以A2/O法为核心，针对日处理量达到10000m3的生活污水进行处理工艺设计。
二、A2/O法概述A2/O法（Anaerobic-Anoxic-Oxic）是一种集脱氮、除磷和去除有机物于一体的污水处理技术。
其工作原理是将厌氧（Anaerobic）、缺氧（Anoxic）和好氧（Oxic）三种环境下的微生物在反应器内合理组合，实现对生活污水的全面处理。
该方法具有运行成本低、效果好、能耗小等优点，因此在本工艺设计中得到了广泛应用。
三、设计思路针对本工程，我们将结合A2/O法，按照预处理、生化处理、沉淀及深度处理等流程，进行10000m3/d生活污水的工艺设计。
预处理部分主要是为了去除污水中较大颗粒的悬浮物和沉淀物；生化处理部分则主要依靠A2/O法进行脱氮除磷；沉淀部分则用于去除悬浮物和生物污泥；深度处理部分则进一步去除水中的杂质，确保出水水质达到国家标准。
四、具体工艺流程1. 预处理阶段：主要包括格栅拦截和沉淀。
利用格栅截留污水中的大颗粒悬浮物，减少对后续处理的冲击负荷；然后进行自然沉淀或气浮工艺去除一部分有机物和颗粒物质。
2. A2/O生化处理阶段：首先将预处理后的污水送入厌氧区，此处主要通过产酸菌进行有机物的酸化过程；然后进入缺氧区，进行反硝化脱氮过程；最后进入好氧区，通过硝化菌进行硝化反应，并进一步去除有机物和进行除磷过程。
3. 沉淀阶段：在沉淀池中，利用重力沉降原理去除活性污泥和生物污泥等悬浮物。
4. 深度处理阶段：采用过滤、消毒等工艺进一步去除水中的杂质和细菌，确保出水水质达到国家排放标准。
五、设备选型与布局根据工艺流程，选择合适的设备进行布局。
主要包括格栅机、沉淀池、A2/O反应器、鼓风机、曝气装置、过滤器和消毒设备等。
第一章 工程设计概述第一节：设计题目某生活小区平均日处理量 2021 0 m 3污水处理工程设计 第二节：设计任务1、确定污水处理厂的工艺流程；2、选择处理构筑物并通过计算确定其尺寸（附必要的草图）；3、按扩初标准，画出污水厂的工艺平面布置图，内容包括表示出处理厂的范围，全部处理构筑物及辅助建筑物、主要管线的布置、主干道等；4、按扩初标准，画出污水处理厂工艺流程高程布置图，表示出原污水、各处理构筑物的高程关系、水位高度以及处理出水的出厂方式；5、编写设计说明书、计算书。
第三节：基本资料 3.1 污水水量与水质 生活污水设计流量:平均时：Q 平=2021 00m 3/d=833.33m 3/h 总变化系数：Kz=1.58最高时：Q max =K z Q 平= 2021 0×1.58=31600m 3/d=1316.67m 3/h =0.37m 3/s污水水质： COD:290mg/L ； pH=6~9 BOD 5: 210 mg ／L ； SS : 200 mg ／L 。
3.2 处理要求5BOD ≤20mg ／L ，(水中溶解性BOD 5) SS≤20mg ／L 。
处理程度:5BOD :%47.9021020-210100%S S -S io ie io 1==⨯=ηSS: %00.0920020- 200100%S S -S io ie io 1==⨯=η 3.3 气象与水文资料风向：常年主导风向为西北风，夏季主导风向为东南风,年平均风速：4.3m/s ； 气温：年平均11 ℃；极端温度：最高37.3℃，最低-21℃。
土壤冰冻深度：0.6m 地下水位：地面下2.0m 。
第四节：设计依据第二章污水处理工艺流程说明污水厂厂址选择应遵循下列各项原则:1、应与选定的工艺相适应2、尽量少占农田3、应位于水源下游和夏季主导风向下风向4、应考虑便于运输5、充分利用地形第一节：工艺方案分析城市污水的生物处理技术是以污水中含有的污染物作为营养源，利用微生物的代谢作用使污染物降解，它是城市污水处理的主要手段，是水资源可持续发展的重要保证。
本设计污水处理厂综合设计包括15个图纸，十分全面，具体详见报告后附图。
本报告附图全面详细。
图纸内容如下：A2O池，初沉池，幅流式二沉池，隔栅，工艺简单图，工艺流程图（高程图），回转耙式格栅除污机图，平面布置图，污泥浓缩池，厌氧消化池，钟式沉砂池等。
全为CAD制图。
下载后复制放大或打印可看清！题目20000m3/d城市污水处理厂综合设计专业: 环境工程年级: 2005级学号: 3105001286姓名: 莫笑伟指导教师:2008年12 月摘要我国水体污染主要来自两方面，一是工业发展超标排放工业废水，二是城市化中由于城市污水排放和集中处理设施严重缺乏，大量生活污水未经处理直接进入水体造成环境污染。
工业废水近年来经过治理虽有所减少，但城市生活污水有增无减，占水质污染的51%以上。
我国水体污染主要来自两方面，一是工业发展超标排放工业废水，二是城市化中由于城市污水排放和集中处理设施严重缺乏，大量生活污水未经处理直接进入水体造成环境污染。
工业废水近年来经过治理虽有所减少，但城市生活污水有增无减，占水质污染的51%以上。
本设计要求处理水量为20000m3/d的城市生活污水，设计方案针对已运行稳定有效的A2/O活性污泥法工艺处理城市生活污水。
A2O工艺由于不同环境条件，不同功能的微）能生物群落的有机配合，加之厌氧、缺氧条件下，部分不可生物降解的有机物（CODNB被开环或断链，使得N、P、有机碳被同时去除，并提高对COD的去除效果。
它可以同NB－－时完成有机物的去除，硝化脱氮、磷的过量摄取而被去除等功能，脱氮的前提是NH3N应完全硝化，好氧池能完成这一功能，缺氧池则完成脱氮功能。
厌氧池和好氧池联合完成除磷功能。
关键词：城市生活污水，活性污泥，A2/O目录摘要 (III)目录 (IV)第一章设计概述 ······································································- 7 -1设计任务 ······································································- 7 - 2设计原则 ······································································- 7 - 3设计依据 ······································································- 8 - 第二章工艺流程及说明 ·····························································- 8 -1工艺方案分析 ································································- 8 - 2工艺流程 ······································································- 9 - 3流程各结构介绍 ·····························································- 9 -3.1格栅······························································································· - 9 -3.2沉砂池··························································································- 10 -3.3初沉池··························································································- 10 -3.4生物化反应池··············································································- 10 -3.5二沉池··························································································- 12 -3.6浓缩池··························································································- 12 - 第三章构筑物设计计算 ··························································· - 12 -1格栅 ·········································································· - 12 -1.1设计说明······················································································- 12 -1.2设计计算······················································································- 13 -2沉砂池 ······································································· - 16 -2.1设计说明······················································································- 16 - 3初沉池 ······································································· - 17 -3.1设计说明······················································································- 17 -3.2设计计算······················································································- 17 - 4生化池 ······································································· - 19 -4.1设计说明······················································································- 19 -4.2设计计算······················································································- 19 - 5二沉池 ······································································· - 26 -5.1设计说明······················································································- 26 -5.2设计计算······················································································- 26 - 6液氯消毒 ···································································· - 29 -6.1设计说明······················································································- 29 -6.2设计计算······················································································- 29 - 7污泥浓缩池 ································································· - 30 -7.1设计说明······················································································- 30 -7.2设计计算······················································································- 30 -8 污泥消化池 ································································· - 31 -8.1设计说明······················································································- 31 -8.2设计计算······················································································- 32 - 9浓缩污泥提升泵房 ························································ - 38 -9.1设计选型······················································································- 38 -9.2提升泵房······················································································- 38 -9.3污泥回流泵站··············································································- 38 -10污泥脱水间 ······························································· - 39 -10.1设计说明······················································································- 39 -11鼓风机房 ·································································· - 39 - 12恶臭处理系统 ···························································· - 39 -12.1设计说明······················································································- 39 -12.2设计计算······················································································- 39 -12.3风机选型······················································································- 40 - 第四章污水处理厂总体布置 ····················································· - 41 -1总平面布置 ································································· - 41 -1.1总平面布置原则··········································································- 41 -1.2总平面布置结果··········································································- 41 -2高程布置································································································- 42 -2.1高程布置原则··············································································- 42 - 第五章参考文献 ···································································· - 42 -第一章设计概述1设计任务本次课程设计的主要任务是完成某城市污水厂的A2/O工艺设计处理生活污水，处理水量为20000m3/d，按近期规划人口10万人计算（自定）。
1工程概述1.1 DAT-IAT工艺概述DAT-IAT法是SBR工艺中继ICEAS、CASS、CAST、IDEA法之后不断完善发展的一种新方法，它的反应机理以及污染物质的去除机制和CFS、传统SBR 相同，仅是构筑物的构成方式和运行操作不一样。
原污水首先经DA T池的初步生物处理后再进IAT池，由于连续曝气起到了水力均衡作用，提高整个工艺的稳定性，进水工序只发生在DAT池，排水工序只发生在IAT池，使整个生物处理系统的可调节性进一步增强，有利于有机物的去除。
一部分剩余污泥由IAT池回流到DAT池。
与CASS和ICEAS工艺相比，DAT池是一种更加灵活、完备的预反应池，从而使DAT池和IAT池能够保持较长的污泥龄和很高的MLSS浓度，对有机负荷及毒物有较强的抗冲击能力。
该污水处理系统主要包括互相串联的连续曝气反应池和间歇曝气反应池以及原污水进水装置、处理出水装置和污泥装置。
连续曝气反应池和间歇曝气反应池是本工艺系统的主要构筑物，生化反应、沉淀等主要工序都在这里进行。
为此，连续曝气反应池和间歇曝气反应池分别安装有连续曝气装置和间歇曝气装置，间歇曝气反应池中还安装有污泥泵和滗水器。
由于原污水是连续进入连续曝气反应池的，因而原污水进水装置比较简单，只要利用普通的污水泵即可将原污水经污水管线和沉砂池及计量槽泵入连续曝气反应池。
处理出水装置主要包括出水泵和加氯间，处理出水加氯后由出水泵和出水管线送出。
污泥装置主要包括贮泥池和脱水机。
间歇曝气反应池中的剩余污泥利用污泥泵送入贮泥池在送入脱水机后制成泥饼运出。
该处理工艺主要包括进水、连续曝气、间歇曝气、沉淀、出水和闲置等工序，即首先使原污水经原污水进水装置连续进入连续曝气反应池与池中的活性污泥混合并进行连续曝气，然后再连续进入间歇曝气反应池进行间歇曝气和沉淀，泥水分离后的上清液即为处理出水并利用出水装置送出，间歇曝气反应池中的一部分沉降污泥泵入连续曝气反应池作为回流污泥，剩余污泥经污泥装置排出[1]。
SBR20000m3污水处理设计方案2设计依据（1）《室外排水设计规范》 (GB50014-2006)（2）《污水综合排放标准》 (GB8978-1996)（3）《城镇污水处理厂污染物排放标准》 (GB18918-2002)（4）《给水排水工程结构设计规范》（5）《建筑给水排水设计规范》（6）《给排水设计手册》(7) 广东省地方标准《水污染物排放限值》(8) 地表水环境质量标准 (GB3838-2002)3设计原则本设计遵循如下原则进行工艺路线的选择及工艺参数的确定[1-4]：（1）采用成熟、合理、先进的处理工艺，处理能力符合处理要求。
（2）投资少、能耗和运行成本低，操作管理简单，具有适当的安全系数，各工艺参数的选择略有富余，并确保处理后的污水可以达标排放。
（3）根据地形地貌，结合站区自然条件及外部物流方向，并尽可能使土石方平衡，减少土石方量，以节约基建投资，降低运行费用，即在满足工艺要求的条件下，尽量减少建设投资，降低运行费用。
（4）废水处理系统在运行上有较大的灵活性和可调性，可以适应污水水质、水量和水温的波动，即处理设施应有利于调节、控制、运行操作。
（5）处理设施具有较高的运行效率，以较为稳定可靠的处理手段完成工艺要求。
（6）总图设计应考虑符合环境保护要求。
管线设计应包括各专业所有管线，并满足工艺的要求；工程竖向设计应结合周边实际情况提出雨水排放方式及流向。
（7）在设计中采用耐腐蚀设备及材料，以延长设施的使用寿命。
（8）废水处理系统的设计考虑事故的排放、设备备用等保护措施。
（9）工程设计及设备安装的验收及资料应满足国家相关专业验收技术规范和标准。
4污水、污泥处理的工艺方案4.1工艺方案确定的原则根据国家有关城市污水处理项目建设的有关要求及的实际情况，同时根据所确定的污水处理厂进、出厂水质指标和国内污水处理厂运转经验，要达到上述指标，污水必须进行二级生化处理。
污水、污泥处理工艺按如下原则来考虑：（1）采用的上艺运行可靠、技术成熟、处理效果良好，能保证出水水质达标排放。
第一章 污水处理构筑物设计计算一、粗格栅1.设计流量Q=20000m 3/d ，选取流量系数K z =1.5则： 最大流量Q max ＝1.5×20000m 3/d=30000m 3/d ＝0.347m 3/s2.栅条的间隙数（n ）设:栅前水深h=0.4m,过栅流速v=0.9m/s,格栅条间隙宽度b=0.02m,格栅倾角α=60° 则：栅条间隙数85.449.04.002.060sin 347.0sin 21=⨯⨯︒==bhv Q n α(取n=45)3.栅槽宽度(B)设：栅条宽度s=0.01m则：B=s （n-1）+bn=0.01×（45-1）+0.02×45=1.34m 4.进水渠道渐宽部分长度设：进水渠宽B 1=0.90m,其渐宽部分展开角α1=20°（进水渠道前的流速为0.6m/s ） 则：m B B L 60.020tan 290.034.1tan 2111=︒-=-=α5.栅槽与出水渠道连接处的渐窄部分长度(L 2)m L L 30.0260.0212===6.过格栅的水头损失（h 1）设：栅条断面为矩形断面，所以k 取3则：m g v k kh h 102.060sin 81.929.0)02.001.0(4.23sin 2234201=︒⨯⨯⨯⨯===αε其中ε=β（s/b ）4/3k —格栅受污物堵塞时水头损失增大倍数，一般为3 h 0--计算水头损失，mε--阻力系数，与栅条断面形状有关，当为矩形断面时形状系数β=2.4将β值代入β与ε关系式即可得到阻力系数ε的值7.栅后槽总高度(H)设：栅前渠道超高h 2=0.3m则：栅前槽总高度H 1=h+h 2=0.4+0.3=0.7m栅后槽总高度H=h+h 1+h 2=0.4+0.102+0.3=0.802m 8.格栅总长度(L)L=L 1+L 2+0.5+1.0+ H 1/tan α=0.6+0.3+0.5+1.0+0.7/tan60°=2.8 9. 每日栅渣量(W)设：单位栅渣量W 1=0.05m 3栅渣/103m 3污水则：W=Q W 1=05.0105.130000100031max ⨯⨯=⨯⨯-Z K W Q =1.0m 3/d 因为W>0.2 m 3/d,所以宜采用机械格栅清渣 10.计算草图：图1-1 粗格栅计算草图二、集水池设计集水池的有效水深为6m,根据设计规范，集水池的容积应大于污水泵5min 的出水量,即:V ＞0.347m 3/s ×5×60=104.1m 3,可将其设计为矩形，其尺寸为3m ×5m ，池高为7m ，则池容为105m 3。
某城市污水处理厂工艺设计日处理2万立方米污水水污染控制工程课程设计课程题目：某城市污水处理厂工艺设计目录第一章总论 (1)1.1处理水量的设计规模 (1)1.2进水水质与处理目标的确定 (1)1.3气象与水文资料 (1)1.4厂区地形 (1)第二章污水处理工艺流程说明 (2)2.1城市污水处理厂工艺流程方案的提出 (2)2.2方案的确定 (2)第三章污水处理构筑物设计 (3)33.1.1设计参数.....................................................33.2.2设计计算.....................................................3.2平流沉砂池 (6)63.2.1设计参数.....................................................63.2.2设计计算.....................................................3.3平流式初沉池 (8)93.3.1设计参数.....................................................93.3.2设计计算.....................................................3.4曝气池 (13)133.4.1设计参数...................................................133.4.2设计计算....................................................3.5二沉池 (17)183.5.1设计说明...................................................183.5.2设计参数...................................................183.5.3设计计算...................................................第四章主要设备说明 (21)第五章污水厂总体布置 (22)第六章人员编制 (27)第七章设计总结及体会 (28)参考文献 (29)第一章 总论1.1处理水量的设计规模污水处理厂的日进水量为12万3/m d 。
20000吨每天城市污水处理厂设计计算解析一、粗格栅1、设计流量Q=20000m3/d，选取流量系数Kz=1、5则：最大流量Qmax＝1、520000m3/d=30000m3/d＝0、347m3/s2、栅条的间隙数（n）设:栅前水深h=0、4m,过栅流速v=0、9m/s,格栅条间隙宽度b=0、02m,格栅倾角α=60则：栅条间隙数(取n=45)3、栅槽宽度(B)设：栅条宽度s=0、01m则：B=s（n-1）+bn=0、01（45-1）+0、0245=1、34m4、进水渠道渐宽部分长度设：进水渠宽B1=0、90m,其渐宽部分展开角α1=20（进水渠道前的流速为0、6m/s）则：5、栅槽与出水渠道连接处的渐窄部分长度(L2)6、过格栅的水头损失（h1）设：栅条断面为矩形断面，所以k取3则：其中ε=β（s/b）4/3k格栅受污物堵塞时水头损失增大倍数，一般为3 h0--计算水头损失，m ε--阻力系数（与栅条断面形状有关，当为矩形断面时形状系数β=2、42），将β值代入β与ε关系式即可得到阻力系数ε的值。
7、栅后槽总高度(H)设：栅前渠道超高h2=0、3m则：栅前槽总高度H1=h+h2=0、4+0、3=0、7m 栅后槽总高度H=h+h1+h2=0、4+0、26+0、3=0、96m8、格栅总长度(L)L=L1+L2+0、5+1、0+ H1/tanα=1、48+0、47+0、5+1、0+0、7/tan60=3、85m9、每日栅渣量(W)设：单位栅渣量W1=0、10m3栅渣/103m3污水则：W=Q W1==2、0m3/d因为W>0、2 m3/d,所以宜采用机械格栅清渣10、计算草图如下：四、沉砂池采用平流式沉砂池1、沉砂池长度(L)设：流速v=0、25m/s水力停留时间：t=30s则：L=vt=0、2530=7、5m2、水流断面积(A)设：最大流量Qmax=0、347m3/s（设计1组，分为2格）则：A=Qmax/v=0、347/0、25=1、388m23、池总宽度(B)设：n=2格，每格宽取b=1m则：池总宽B=nb=21=2m4有效水深(h2)：h2=A/B=1、388/2=0、69m（介于0、25～1、0m之间,符合要求）5、贮砂斗所需容积V1 设：T=2d 则：其中X1--城市污水沉砂量，一般采用30m3/106m3，Kz--污水流量总变化系数,取1、56、每个污泥沉砂斗容积（V0）设：每一分格有2个沉砂斗则：V0= V1/(2*2)=1、2/4=0、3 m37、沉砂斗各部分尺寸及容积(V)设：沉砂斗底宽b1=0、5m，斗高hd=0、45m，斗壁与水平面的倾角为55则：沉砂斗上口宽：沉砂斗容积：（略大于V1=0、3m3，符合要求）8、沉砂池高度(H)采用重力排砂设：池底坡度为、06 则：坡向沉砂斗长度为：则：沉泥区高度为h3=hd+0、06L2 =0、45+0、062、26=0、59m 则：池总高度H设：超高h1=0、3m则：H=h1+h2+h3=0、3+0、45+0、59=1、34m9、验算最小流量时的流速：在最小流量时只用一格工作，即n=1,最小流量即平均流量Q=20000m3/d=0、232m3/s 则：vmin=Q/A=0、232/1、388=0、17m/s 沉砂池要求的设计流量在0、15 m/s2、0 m3/ m2、h ，取q=1、5 m3/ m2、hm22、沉淀池直径(D)3、有效水深为(h1)设：水力停留时间（沉淀时间）：t=2 h 则：h1=qt=1、52=3m 校核（介于6～12,符合要求）4、沉淀区有效容积(V1)V1=Ah1=2783=834m35、贮泥斗容积：设：污泥回流比为R=50%回流污泥浓度Xr=10000mg/L 为了防止磷在池中发生厌氧释放，贮泥时间采用Tw=2h则：二沉池污泥区所需存泥容积：则污泥区高度为6、二沉池总高度：设：二沉池缓冲层高度h3=0、4m，超高为h4=0、3m则：池边总高度为 h=h1+h2+h3+h4=3+2、5+0、4+0、3=6、2m设：池底坡度为i=0、05则：池底坡度降为则：池中心总深度为H=h+h5=4、8+0、425=5、23m7、校核堰负荷：径深比堰负荷以上各项均符合要求8、辐流式二沉池计算草图如下：第二章污泥处理构筑物设计计算一、污泥泵房1、设计说明二沉池活性污泥由吸泥管吸入，由池中心落泥管及排泥管排入池外套筒阀井中，然后由管道输送至回流泵房，其他污泥由刮泥板刮入污泥井中，再由排泥管排入剩余污泥泵房集泥井中。
