【水處理計(jì)算書(shū)+公式】活性污泥法脫氮除磷工藝設(shè)計(jì)計(jì)算.123xls

1、一、生物脫氮工藝設(shè)計(jì)計(jì)算,（一）設(shè)計(jì)條件：,設(shè)計(jì)處理水量Q,30000,m3/d=,1250.00 ,m3/h=,0.35 ,m3/s,總變化系數(shù)Kz=,1.42 ,進(jìn)水水質(zhì)：,出水水質(zhì)：,進(jìn)水CODCr=,350,mg/L,CODCr=,100,mg/L,BOD5=S0=,160,mg/L,BOD5=Sz=,20,mg/L,TN=,40,mg/L,TN=,15,mg/L,NH4+-N=,30,mg/L,NH4+-N=,8,mg/L,堿度SALK=,280,mg/L,pH,7.2,SS=,180,mg/L,SS=Ce=,20,mg/L,VSS=,126,mg/L,f=VSS/SS=,0.7,曝

2、氣池出水溶解氧濃度,2,mg/L夏季平均溫度T1,25,硝化反應(yīng)安全系數(shù)K=,3,冬季平均溫度T2,14,活性污泥自身氧化系數(shù)Kd=,0.05,活性污泥產(chǎn)率系數(shù)Y,0.6,混合液濃度X,4000,mgMLSS/L,SVI,150,20時(shí)反硝化速率常數(shù)qdn,20,0.12,kgNO3-N/kgMLVSS,曝氣池池?cái)?shù)n=,2, 若生物污泥中約含,12.40%,的氮用于細(xì)胞合成,（二）設(shè)計(jì)計(jì)算,1、好氧區(qū)容積V1計(jì)算,（1）估算出水溶解性BOD5（Se),6.41 ,mg/L,（2）設(shè)計(jì)污泥齡計(jì)算,硝化速率,低溫時(shí)N(14),0.247 ,d-1,硝化反應(yīng)所需的最小泥齡cm=,4.041 ,d,設(shè)

3、計(jì)污泥齡c=,12.122 ,d,（3）好氧區(qū)容積V1,=,7451.9 ,m3,好氧區(qū)水力停留時(shí)間t1=,5.96 ,h,2、缺氧區(qū)容積V2,（1）需還原的硝酸鹽氮量計(jì)算,微生物同化作用去除的總氮,=,7.11 ,mg/L,被氧化的氨氮進(jìn)水總氮量-出水氨氮量-用于合成的總氮量,24.89 ,mg/L,所需脫硝量進(jìn)水總氮量-出水總氮量-用于合成的總氮量,17.89 ,mg/L,需還原的硝酸鹽氮量NT,536.56 ,kg/d,（2）反硝化速率qdn,Tqdn,20T-20,(為溫度系數(shù)，取1.08）,0.076 ,kgNO3-N/kgMLVSS,（3）缺氧區(qū)容積V2,2534.1 ,m3,缺氧

4、區(qū)水力停留時(shí)間t2=V2/Q=,2.03 ,h,3、曝氣池總?cè)莘eVV1+V2,9986.0 ,m3,系統(tǒng)總污泥齡好氧污泥齡+缺氧池泥齡,16.24 ,d,4、堿度校核,每氧化1mgNH4+-N需消耗,7.14,mg堿度；,去除1mgBOD5產(chǎn)生,0.1,mg堿度；,每還原1mgNO3-N產(chǎn)生,3.57,mg堿度；,剩余堿度SALK1=進(jìn)水堿度-硝化消耗堿度+反硝化產(chǎn)生堿度+去除BOD5產(chǎn)生堿度,181.53 ,mg/L,100mg/L(以 CaCO3計(jì)）,5、污泥回流比及混合液回流比,（1）污泥回流比R計(jì)算,8000,mg/L(r為考慮污泥在沉淀池中停留時(shí)間、池深、污泥厚度等因素的系數(shù)，取,1

5、.2混合液懸浮固體濃度X（MLSS）,4000,mg/L,污泥回流比RX/（XR-X)=,100%,(一般取50100）,（2）混合液回流比R內(nèi)計(jì)算,總氮率N（進(jìn)水TN-出水TN）/進(jìn)水TN,62.50%,混合液回流比R內(nèi),/(1-)=,167%,6、剩余污泥量,（1）生物污泥產(chǎn)量,1525.498006,kg/d,(2)非生物污泥量PS,PSQ（X1-Xe）,1020,kg/d,(3)剩余污泥量X,XPX+PS,2545.498006,kg/d,設(shè)剩余污泥含水率按,99.20%,計(jì)算,7、反應(yīng)池主要尺寸計(jì)算,（1）好氧反應(yīng)池,設(shè),2,座曝氣池，每座容積V單V/n=,3725.96 ,m3,曝

6、氣池有效水深h=,4,m,曝氣池單座有效面積A單V單/h=,931.49 ,m2,采用,3,廊道，廊道寬b=,6,m,曝氣池長(zhǎng)度LA單/B=,51.7 ,m,校核寬深比b/h=,1.50 ,校核長(zhǎng)寬比L/b=,8.62 ,曝氣池超高取,1,m，曝氣池總高度H=,5,m,（2）缺氧池尺寸,設(shè),2,座缺氧池，每座容積V單V/n=,1267.05 ,m3,缺氧池有效水深h=,4.1,m,缺氧池單座有效面積A單V單/h=,309.04 ,m2,缺氧池長(zhǎng)度L好氧池寬度,18.0 ,m,缺氧池寬度BA/L=,17.2 ,m,8、進(jìn)出水口設(shè)計(jì),（1）進(jìn)水管。兩組反應(yīng)池合建，進(jìn)水與回流污泥進(jìn)入進(jìn)水豎井，經(jīng)混合

7、后經(jīng)配水渠、,進(jìn)水潛孔進(jìn)入缺氧池。,單組反應(yīng)池進(jìn)水管設(shè)計(jì)流量Q1,0.347 ,m3/s,進(jìn)水管設(shè)計(jì)流速v1=,0.8,m/s,進(jìn)水管管徑d1=,0.743 ,m,取d1=,0.7,m,校核管道流速v=Q/A,=,0.902 ,m/s,（2）回流污泥入口：,設(shè)計(jì)流量Q2=Q=,0.347 ,m3/s,污泥回流渠道設(shè)計(jì)流速v2=,0.7,m/s,渠道斷面積AQR/v2=,0.496 ,m2,渠道斷面bh=,1,0.5,m,校核流速v=,0.694 ,m/s,（3）進(jìn)水豎井,進(jìn)水孔過(guò)流量：Q（1+R）Q/n,0.347 ,m3/s,孔口流速v=,0.6,m/s,孔口過(guò)水?dāng)嗝娣eA=Q/v=,0.57

8、9 ,m2,(4)出水堰及出水豎井,矩形堰流量公式：,出水流量Q3=,0.347 ,m3/s,堰寬b=,6,m,堰上水頭H=,0.099 ,m,出水孔孔口流速v3=,0.6,m/s,孔口過(guò)水?dāng)嗝娣eA3=,0.579 ,m2,(5)出水管。,管道流速v4=,0.8,ms/,管道過(guò)水?dāng)嗝娣eA4=,0.434 ,m2,出水管管徑d4=,0.743 ,m,取d4=,0.7,m,校核管道流速v=,0.902 ,m/s,9、設(shè)計(jì)需氧量AOR=碳化需氧量+硝化需氧量-反硝化脫氮產(chǎn)氧量,(去除BOD需氧量-剩余污泥中BOD氧當(dāng)量)+(氨氮硝化需氧量-剩余污泥中氨氮的氧當(dāng)量),-,反硝化脫氮產(chǎn)氧量,（1）碳化需

9、氧量D1：,4576.27 ,kgO2/d,(2)硝化需氧量D24.6Q(N0-Ne)-4.612.4%PX=,3834.19 ,kgO2/d,（3）反硝化脫氮產(chǎn)生的氧量D32.86NT,1534.57 ,kgO2/d,（4）總需氧量AORD1+D2-D3,6875.89 ,kgO2/d,286.50 ,kgO2/h,（5）最大需氧量AORmax=KzAOR=,9754.96 ,kgO2/d,406.46 ,kgO2/h,去除1kgBOD的需氧量,1.64 ,kgO2/kgBOD5,（6）標(biāo)準(zhǔn)需氧量,氧總轉(zhuǎn)移系數(shù),0.85,氧在污水中飽和溶解度修正系數(shù),0.95,曝氣池內(nèi)平均溶解氧濃度C,2,

10、mg/L,所在地區(qū)大氣壓力p=,101300,Pa,因海拔高度不高引起的壓力系數(shù)p/101300=,1.00 ,曝氣池水深H=,4,m,曝氣頭距池底距離,0.2,m,曝氣頭淹沒(méi)深度,3.8,m,曝氣頭處絕對(duì)壓力pb=p+9800H=,138540,Pa,曝氣頭氧轉(zhuǎn)移效率EA=,20%,氣泡離開(kāi)水面時(shí)含氧量Qt=,17.54%,夏季清水氧飽和度CS(25)=,8.38,mg/L,Cs(20)=,9.17,mg/L,冬季清水氧飽和度Cs(10),11.33,mg/L,曝氣池內(nèi)平均溶解氧飽和度,9.12 ,mg/L,夏季平均標(biāo)準(zhǔn)需氧量SOR(25)=,412.04 ,kg/h,最大時(shí)標(biāo)準(zhǔn)需氧量SOR

11、max=,584.56 ,kg/h,夏季平均空氣用量QF(25)SOR(25)/0.3/EA=,6867.28 ,m3/h=,114.45 ,m3/min,最大空氣用量Qmax=,9742.75 ,m3/h=,162.38 ,m3/min,（7）所需空氣壓力p（相對(duì)壓力）,p=h1+h2+h3+h4+h,h1：,供風(fēng)管道沿程阻力,0.001 ,MPa,H2：,供風(fēng)管道局部阻力,0.001 ,MPa,h3：,曝氣器淹沒(méi)水頭,0.038 ,MPa,h4：,曝氣器阻力，取,0.004 ,MPa,h：,富余水頭取,0.005 ,MPa,p=,0.049 ,MPa=,49,Kpa,（8）曝氣器數(shù)量計(jì)算,

12、A、按供氧能力計(jì)算,曝氣器供氧能力qc：,0.14,kgO2/(h個(gè)),曝氣器數(shù)量n1=SORmax/qc=,4175 ,個(gè),B、以曝氣器服務(wù)面積校核,單個(gè)曝氣器服務(wù)面積f=F/n1=,0.598 ,m20.75,m2,（9）供風(fēng)管道計(jì)算,A、干管。供風(fēng)干管采用環(huán)狀布置,流速v=,10,m/s,管徑d=,0.415 ,m,取DN=,400,mm,B、支管。單側(cè)供氣支管（布?xì)鈾M管）,（向單側(cè)廊道供氣）,支管空氣流量Q=,1623.791301,m3/h,流速v=,10,m/s,管徑d=,0.240 ,m,取DN=,250,mm,雙側(cè)供氣（向兩側(cè)廊道供氣）,支管空氣流量Q=,3247.582602,m3/h,流速v=,10,m/s,管徑d=,0.339 ,m,取D