污水处理厂计算书(计算式)

四、曝气池,,,,,,,,,

,,,,,,,,,,

1.设计条件,,,,,,,,,

,,,,,,,,,,

曝气池采用平均日流量作为设计基准，并配合检验尖峰小时流量时情形。,,,,,,,,,

依平均日质量平衡计算结果，初沉池出流水性质：,,,,,,,,,

Q=,"24,459",CMD,,,,,,,

TSS=,"2,069",Kg/d=,84.6,mg/L,,,,,

BOD5=,"3,530",Kg/d=,144.3,mg/L,,,,,

TP=,183.8,Kg/d=,7.5,mg/L,,,,,

依尖峰小时质量平衡计算结果，初沉池出流水性质：,,,,,,,,,

Q=,"48,763",CMD,,,,,,,

TSS=,"4,138",Kg/d=,84.9,mg/L,,,,,

BOD5=,"7,062",Kg/d=,144.8,mg/L,,,,,

TP=,367.6,Kg/d=,7.5,mg/L,,,,,

二沉池设计面积：,,,,,,,,,

二沉池面积＝,,"1,257",m2=,"13,526",ft2,,,,

,,,,,,,,,,

2.计算结果摘要,,,,,,,,,

,,,,,,,,,,

回流污泥(RAS),,,,,,,,,

Q=,3.95,MGD=,"14,962",CMD,,,,,

废弃污泥(WAS),,,,,,,,,

Q=,287.5,CMD=,0.076,MGD,,,,,

TSS=,"2,300",Kg/d,,,,,,,

BOD5=,"2,002",Kg/d,,,,,,,

反应槽出流水,,,,,,,,,

Q=,"38,581",CMD,,,,,,,

TSS=,"3,107",mg/L,,,,,,,

二沉池出流水,,,,,,,,,

Q=,"23,331",CMD=,6.16,MGD,,,,,

TSS=,20.0,mg/L,,,,,,,

总非溶解性BOD5＝,,,6.7,mg/L,,,,,

溶解性BOD5＝,,,1.8,mg/L,,,,,

总磷＝,,,0.5,mg/L,,,,,

,,,,,,,,,,

3.设计生物反应槽,,,,,,,,,

,,,,,,,,,,

(1)原进流水水质特性基本假设,,,,,,,,,

"(参考""Theory,DesignandOperationofNutrientRemoval-ActivatedSludge",,,,,,,,,

"Process""一书)",,,,,,,,,

,,,,,,,,,,

A.污染负荷,,,,,,,,,

平均日流量时：,,,,,,,,,

流量，Qin，MGD,,,,6.46,＝,"24,459",CMD,,

BOD5，lb/d,,,,"7,777",＝,144.3,mg/L,,

总悬浮固体物，TSS，lb/d,,,,"4,558",＝,84.6,mg/L,,

总凯氏氮，TKN，lb/d,,,,"2,156",＝,40.0,mg/L,,

总磷，TP，lb/d,,,,404.9,＝,7.5,mg/L,,

碱度，lb/dasCaCO3,,,,"10,779",＝,200.0,mg/L,,

硫化氢，lb/d,,,,53.9,＝,1.0,mg/L,,

尖峰小时流量时：,,,,,,,,,

流量，Qin，MGD,,,,12.88,＝,"48,763",CMD,,

BOD5，lb/day,,,,"15,560",＝,144.8,mg/L,,

总悬浮固体物，TSS，lb/d,,,,"9,117",＝,84.9,mg/L,,

总凯氏氮，TKN，lb/d,,,,"4,298",＝,40.0,mg/L,,

总磷，TP，lb/d,,,,810.1,＝,7.5,mg/L,,

碱度，lb/dasCaCO3,,,,"21,489",＝,200.0,mg/L,,

硫化氢，lb/d,,,,107.4,＝,1.0,mg/L,,

B.进流水质特性,,,,,,,,,

"总BOD/BOD5,R1=",,,,1.47,,,,,

"难分解性总凯氏氮(%),TKN1=",,,,4.0,,,,,

"难分解溶解性COD(%),COD1=",,,,12.50,,,,,

总悬浮固体物(TSS),,,,,,,,,

,"挥发性固体物(VSS)(%),VSS1",,,,,,75.0,,

,"难分解之挥发性固体物(%),VSS2",,,,,,40.0,,

,"VolatilecontentofnonbiodegradableVSS(%),VSS3",,,,,,90.0,,

,"COD/VSS,R2",,,,,,1.42,,

,"VSS之氮含量(%,N/VSS),N1VSS",,,,,,8.0,,

,"VSS之磷含量(%,P/VSS),P1VSS",,,,,,1.0,,

"COD/BOD之估计值,R3",,,,,,,2.21,,

"溶解性BOD5/总BOD5之估计值(%),R4",,,,,,,75,,

初沉池中各污染物去除率：,,,,,,,,,

"TSS去除率(%),RTSS",,,,,,,60,,

"BOD5,RBOD=RTSSx进流水TSS/进流水BOD5xVSS1x(1-VSS2)xR2/R1=",,,,,,,,28.3,

"总凯氏氮,RTKN=RTSSx进流水TSS/进流水TKNxVSS1xN1VSS=",,,,,,,,19.0,

"总磷,RTP=RTSSx进流水TSS/进流水TPxVSS1xP1VSS=",,,,,,,,11.3,

(2)曝气池中之生化反应机制常数及水质特性,,,,,,,,,

,,,,,,,,,,

A.喜气槽,,,,,,,,,

μmax20=,,10.0,day-1，,Φforμmax20=,,1.04,,,

μmaxT=,,8.42,day-1,,,,,,

Ks=,,50.0,mg/L,,,,,,

Yg=,,0.73,mgTSS/mgBOD5,,,,,,

Kd20=,,0.23,day-1，,ΦforKd20=,,1.04,,,

KdT=,,0.19,day-1,,,,,,

"挥发性TSS(%),VSS4=",,,,,,90.0,,,

"难分解性VSS(%),VSS5=",,,,,,23.0,,,

"VSS之氧当量数(mgCOD/mgVSS),CODVSS=",,,,,,1.42,,,

"VSS中之氮含量(%,N/VSS)N2VSS=",,,,,,12.0,,,

"BOD5/总磷(mgBOD5/mgTP-P),R5=",,,,,,15.0,,,

,,,,,,,,,,

B.硝化槽,,,,,,,,,

μmaxT=,,0.28,day-1,,,,,,

Kn=,,0.40,mg-N/L,,,,,,

KDO=,,1.30,mg/L,,,,,,

Yn=,,0.15,mgTSS/mgNO3,,,,,,

KdnT=,,0.05,day-1,,,,,,

"挥发性TSS(%),VSS6=",,,,,90.0,,,,

"VSS中之氮含量(%,N/VSS),N3VSS＝",,,,,12.0,,,,

"VSS中之磷含量(%,P/VSS),P3VSS＝",,,,,2.0,,,,

"硝化菌之MCRT,MCRTN＝",,,,4.3,day,,,,

,,,,,,,,,,

C.硝化作用,,,,,,,,,

单位需氧量(mgO2/mgNO3generated)=,,,,,4.60,,,,

碱度消耗量(mgasCaCO3/mgNO3)=,,,,,7.20,,,,

,,,,,,,,,,

D.脱硝作用,,,,,,,,,

单位需氧量(mgO2/mgNO3denitrified)=,,,,,2.86,,,,

碱度产生量(mgasCaCO3/mgNO3)=,,,,,3.60,,,,

,,,,,,,,,,

E.硫化氢氧化作用,,,,,,,,,

单位需氧量(lbO2/lbH2S)=,,,,,2.00,,,,

(3)操作参数,,,,,,,,,

由于设计一VIP生物处理法所须考虑之设计参数相当多，除一般活性,,,,,,,,,

污泥法所常采用之MLSS、F/M及HRT外，尚考虑硝化液回流率(NRCY)，,,,,,,,,,

厌气池回流率(ARCY)，回流污泥(RAS)等，西图公司以多年发展VIP系统,,,,,,,,,

之经验，建议各参数之设计准则如下：,,,,,,,,,

,,,,,,,,,,

F/M(kgTBOD/kgMLVSS-day),,,,0.1~0.2,,,,,

SRT(days),,,,5~15,,,,,

MLSS(mg/L),,,,2000~3500,,,,,

HRT(hours),,,,,,,,,

,,厌氧槽,,1.00,,,,,

,,缺氧槽,,1.00,,,,,

,,好氧槽,,4.0~10.0,,,,,

,,合计,,6.0~12.0,,,,,

RAS(%),,,,40~80,,,,,

NRCY(%),,,,100,,,,,

ARCY(%),,,,50~100,,,,,

,,,,,,,,,,

A.基本设计条件假设,,,,,,,,,

依据民治污水处理厂的背景条件，假设各项操作参数如下。,,,,,,,,,

水中溶氧=,,2.0,mg/L,细胞停留时间(MCRT)=,,,10,天,

pH=,,7.20,units,水温=,,,15,℃,

MLSS=,,"3,000",mg/L,好氧槽脱硝率ANR=,,,10,%,

废弃污泥浓度,,"8,000",mg/L,NRCY=,,,120,%,

,,,,,,,,,,

B.反应槽体积计算,,,,,,,,,

依前述设计准则，假设,,,,,,,,,

好氧槽之HRT=,,6.0,hours,,,,,,

缺氧槽之HRT=,,1.0,hours,,,,,,

厌氧槽之HRT=,,1.0,hours,,,,,,

则可得,,,,,,,,,

好氧槽总体积(AERVol),,,,,,,,,

＝,QinxTAER,,,,,,,,

＝,6.46,MGDx,6.0,hours,,,,,

＝,1.62,MG,,,,,,,

缺氧槽总体积(ANXVol),,,,,,,,,

＝,QinxTANX,,,,,,,,

＝,6.46,MGDx,1.0,hours,,,,,

＝,0.27,MG,,,,,,,

厌氧槽总体积(ANAVol),,,,,,,,,

＝,QinxTANA,,,,,,,,

＝,6.46,MGDx,1.0,hours,,,,,

＝,0.27,MG,,,,,,,

,,,,,,,,,,

已知初沉池出流水=,,,"24,459",CMD,,,,,

RAS=,(QinxMLSS-Q2ndxBODout-QwasxWAS)/(WAS-MLSS),,,,,,,,

=,3.73,MGD=,"14,122",CMD,,,,,

总进流量＝,,"24,459",CMD+,"14,122",CMD,,,,

＝,,"38,581",CMD=,10.19,MGD,,,,

选择反应槽池数=,,4,池,,,,,,

选择反应槽水深=,,6.0,m,,,,,,

,,,,,,,,,,

已知各槽体之体积如下:,,,,,,,,,

总体积(TOTVol)＝,,,,2.15,MG=,"8,153",m3,,

好氧槽总体积(AERVol)＝,,,,1.62,MG=,"6,115",m3,,

厌氧槽总体积(ANAVol)＝,,,,0.27,MG=,"1,019",m3,,

缺氧槽总体积(ANXVol)＝,,,,0.27,MG=,"1,019",m3,,

选择四个反应槽总宽度＝,,,,32.0,m,,,,

每一反应槽宽度=,,,32.0,m/,4,=,8.0,,

选择反应槽的渠道数=,,,1,,,,,,

每一渠道宽度=,,,8.0,m/,1,=,8.0,m,

每一反应槽之好氧槽长度=,,,,,,,,,

＝,"6,115",m3/,6.0,m/,8.0,m/,4,,

＝,31.8,m,,,,,,,

选择好氧槽之长度＝,,,28.0,m,,,,,

好氧槽每一分区长度＝,,,28.0,/,4,=,7.0,m,

缺氧槽及厌氧槽长度,,,,,,,,,

＝,"1,019.1",m3/,6.0,m/,4.0,m/,12,,

＝,3.5,m,,,,,,,

选择厌氧槽或缺氧槽之长度为,,,,3.5,m,,,,

每一反应槽总长度=,,,,,,,,,

＝,28.0,m+,3.5,m+,3.5,m+,3.5,m,

＝,38.5,m,,,,,,,

每一渠道长度=,,38.5,m/,1,=,38.5,m,,

,,,,,,,,,,

厌氧槽总体积(ANAVol),,,,,,,,,

＝,3.50,mx,4.00,mx,6.00,mx,12,,

＝,"1,008",m3=,0.27,MG,,,,,

缺氧槽总体积(ANXVol),,,,,,,,,

＝,3.50,mx,4.00,mx,6.00,mx,12,,

＝,"1,008",m3=,0.27,MG,,,,,

好氧槽总体积(AERVol),,,,,,,,,

＝,7.00,mx,8.00,mx,6.00,mx,16,,

＝,"5,376",m3=,1.42,MG,,,,,

反应槽总体积(TOTVol),,,,,,,,,

＝,"7,392",m3=,1.95,MG,,,,,

,,,,,,,,,,

Check:,,,,,,,,,

厌氧槽之HRT＝,,,ANAVol,/Qin=,0.99,hours,,OK!,

缺氧槽之HRT＝,,,ANXVol,/Qin=,0.99,hours,,OK!,

好氧槽之HRT＝,,,AERVol,/Qin=,5.27,hours,,OK!,

反应槽之总HRT=,,,,,7.25,hours,,OK!,

MLSS=(TotalTSSxMCRT)/(8.34xTotalVol),,,,,,,,,

=,"3,107",mg/L,,,,,,,

(其中TotalTSS系指废弃污泥中之TSS量，请见4.固体物产量),,,,,,,,,

F/M=BODLoading/(TOTVolxMLSS)=,,,,,,0.11,,OK!,

缺氧槽之F/M=,,0.81,day-1,,,,,,

好氧槽之MCRTAER=(AERVol/TOTVol)xMCRT=,,,,,,,7.27,Days,

,,,,,,,,,,

C.脱氮计算,,,,,,,,,

"脱氮速率常数(SpecificDenitrificationRate,SDRN)系指单位时间之单",,,,,,,,,

位MLSS所能去除之氮量，其计算式为：,,,,,,,,,

SDNR20=0.03xF/M+0.029(在20oC下),,,,,,,,,

SDNRT=SDNR20x1.06(T-20),,,,,,,,,

因此本反应槽之SDNR15=,,,,1.87,mg/g/hr,,,,

,,,,,,,,,,

NOX-N(mg/L)浓度计算:,,,,,,,,,

无脱硝反应时DNo,,,,,,,,,

＝,(1+MCRTxKdnT)xnitrifierTSS/(Qinx8.34xYn)=,,,,,,20.2,,

"(其中NitrifierTSS系指废弃污泥中由硝化反应产生之TSS量,请见(4)固体",,,,,,,,,

物产量),,,,,,,,,

考虑好氧槽脱硝反应时DN1,,,,,,,,,

＝,(1-ANR)xDNo=,,,18.2,,,,,

考虑缺氧槽脱硝反应时,,,,,,,,,

＝,DN1-SDNRxANXHRTxMLSS/1000=,,,,,12.4,,,

考虑回流NRCY时,,,,,,,,,

＝,DN1/(1+RAS/Qin+NRCY/100)=,,,,8.3,,,,

,,,,,,,,,,

D.回流污泥量计算,,,,,,,,,

已知假设回流污泥浓度=,,,,"8,000",mg/L,,,,

RAS=,(QinxMLSS-Q2ndxBODout-QwasxWAS)/(WAS-MLSS),,,,,,,,

=,3.95,MGD=,"14,962",CMD,,,,,

Area=,"13,526",ft2,,SOR=,477.7,CMD/m2,,,

RASCap=,,3.60,mgd,=,19.4,,,,

SLR=,12.4,lb/sf-day,,,,,,,

=,2.52,Kg/m2-hr,,,,,,,

,,,,,,,,,,

(4)固体物产量，SOLIDSPRODUCTION(lb/d),,,,,,,,,

,,,,,,,,,,

A.初沉污泥，PrimarySludge,,,,,,,,,

TSS=进流水TSSxRTSS,,,,,,,,,

=,"6,834",lb/d=,"3,107",Kg/d,,,,,

VSS=进流水TSSxRTSSxVSS1,,,,,,,,,

=,"5,126",lb/d=,"2,330",Kg/d,,,,,

生物可分解性VSS=进流水TSSxRTSSxVSS1x(1-VSS2),,,,,,,,,

=,"3,075",lb/d=,"1,398",Kg/d,,,,,

,,,,,,,,,,

B.废弃污泥，WasteActivatedSludge(WAS),,,,,,,,,

,,,,,,,,,,

(a)进流之难分解固体物,,,,,,,,,

VSSA=进流水TSSx(1-RTSS)xVSS1xVSS2,,,,,,,,,

=,"1,367",lb/d=,621.3,Kg/d,,,,,

TSS=进流水TSSx(1-RTSS)x(1-VSS1/VSS3x(1-VSS2)),,,,,,,,,

=,"2,278",lb/d=,"1,036",Kg/d,,,,,

,,,,,,,,,,

(b)好氧槽之固体物,,,,,,,,,

活性TSS=进流水BOD5x(1-RBOD)-QinxBODeffx8.34)xYg,,,,,,,,,

/(MCRT+(1/MCRT+KdT),,,,,,,,,

=,,"1,849",lb/d=,840.4,Kg/d,,,,

非活性TSS=活性TSSxKdTxVSS5xMCRT=,,,,,,,,,

=,,823.5,lb/d=,374.3,Kg/d,,,,

,,,,,,,,,,

(c)硝化槽,,,,,,,,,

TSS=Ynx(1-N3VSSxVSS6)x(进流水TKNx(1-RTKN)-VSSAxN1VSS,,,,,,,,,

-好氧槽固体物xVSS4xN2VSS-QinxNH3effx8.34-TKNxTKN1)/,,,,,,,,,

(MCRTx(1/MCRT+KdnT)),,,,,,,,,

=,108.8,lb/d=,49.4,Kg/d,,,,,

总固体物，TotalTSS=,,,"5,059",lb/d=,"2,300",Kg/d,,,

净污泥产生率=TotalTSS/(进流BOD5x(1-RBOD)),,,,,,,,,

＝,0.91,lbTSS/lbBOD5Applied,,,,,,,

总BOD5=总固体物/净污泥产生率,,,,,,,,,

＝,"5,578",lb/d=,"2,535",Kg/d,,,,,

废弃污泥所含BOD5=,,,,,,,,,

＝,总固体物x0.9x1.42x0.68+液体中所含BOD5,,,,,,,,

＝,"1,999",Kg/d+,2.5,Kg/d,,,,,

＝,"2,002",Kg/d,,,,,,,

挥发性固体物比率=,,,,,,,,,

＝,(VSSA+好氧槽固体物xVSS4+硝化槽TSSxVSS6)/(TotalTSS),,,,,,,,

＝,76.5,%,,,,,,,

,,,,,,,,,,

活性TSS比率=活性TSS/TotalTSS=,,,,,36.5,%,,,

硝化槽污泥比率=硝化槽TSS/TotalTSS=,,,,,,2.2,%,,

N-Content=(VSSAxN1VSS+好氧槽固体物xN2VSSxVSS4+硝化槽,,,,,,,,,

TSSxVSS6xN3VSS)/(硝化槽挥发性固体物比率xTotalTSS),,,,,,,,,

＝,10.6,%，N/VSS,,,,,,,

P-Content=(进流水TPx(1-RTP)-Qinx出流水之TP)/,,,,,,,,,

(硝化槽挥发性固体物比率xTotalTSS),,,,,,,,,

＝,8.6,%，P/VSS,,,,,,,

,,,,,,,,,,

(5)出流水水质预估,,,,,,,,,

,,,,,,,,,,

水质项目,,,,平均日流量,,尖峰时流量,,,

BOD5(mg/L),,,,,,,,,

难分解性,,,,6.7,,7.6,,,

溶解性,,,,1.8,,2.7,,,

,,,,,,,,,,

TSS(mg/L)，假设值,,,,20.0,,20.0,,,

TKN-N(mg/L),,,,4.0,,13.1,,,

NH3-N(mg/L),,,,0.8,,9.9,,,

NOX-N(mg/L),,,,12.4,,7.9,,,

TN(mg/L),,,,16.4,,21.0,,,

Total-P(mg/L),,,,0.5,,0.5,,,

Alkalinity(mg/LasCaCO3),,,,82.6,,123.2,,,

Note:ResidualAlkalinityLessThan50mg/LasCaCO3IndicateNeed,,,,,,,,,

forSupplementalAlkalinity.,,,,,,,,,

附注:,,,,,,,,,

BODeff=出流水之溶解性BOD=Ksx(1/MCRT+KdT)/(μmaxT-1/MCRT-KdT)=,,,,,,,,,

＝,1.8,mg/L,,,,,,,

NH3eff=出流水之NH3=Knx(1/MCRTAER+KdnT)/(μmaxT-1/MCRTAER-KdnT)=,,,,,,,,,

＝,0.8,mg/L,,,,,,,

TKNeff=出流水之TKN=NH3eff+进流水TKNxTKN1/(Qinx8.34)+,,,,,,,,,

(硝化槽之挥发性固体物比率xN-Contentx出流水TSS)=,,,,,,,,,

＝,4.0,mg/L,,,,,,,

,,,,,,,,,,

"1,930.87",-8.98,,,,,,,,

PeakNOXPossible=,,,23.36,,,,,,

MaxF/M=,,1.62,,,,,,,

SRDN=,,2.72,,,,,,,

NOXw/SimDenite=,,,12.1,,,,,,

NOXBasedonDenite=,,,7.9,,,,,,

NOXBasedonRecycle=,,,7.5,,,,,,

,,,,,,,,,,

4.空气需求量,,,,,,,,,

,,,,,,,,,,

理论需氧量为碳水化合物分解、硝化作用及硫化氢氧化各项需氧量,,,,,,,,,

之和，再扣除脱硝之释氧量，由下表计算：,,,,,,,,,

,,,,,,,,,,

,,OXYGENREQUIREMENTS(lb/day),,,,,,,

Item,,,,日平均值,,,每日尖峰值,,

,,,,(Average),,,(DiurnalPeak),,

Carbonaceous,,,,"5,817",,,"11,695",,

Nitrogeneous,,,,"5,004",,,"6,640",,

DenitrificationCredit,,,,"1,196",,,"1,701",,

H2S,,,,108,,,215,,

Net,,,,"9,733",,,"16,849",,

CarbonaceousOxygenDemand,,,,1.04,lbO2/lbBOD5Applied,,,,

TotalOxygenDemand,,,,1.74,lbO2/lbBOD5Applied,,,,

DiurnalPeakingFactor,,,,1.73,,,,,

,,,,,,,,,,

OUR(mg/L/hr),,,,,,,,,

,,Average,,34.24,,,,,

,,Peak,,59.27,,,,,

Aerationhp@2.2lbO2/hp-hr,,,,,,,,,

,,,,Average,,184.34,,,

,,,,Peak,,319.10,,,

Mixerhp@40hp/MG,,,,,,,,,

,,,,Anaerobic,,10.65,,,

,,,,Anoxic,,10.65,,,

,,,,Total,,21.30,,,

MLRhpRequirement@1hp/mgd,,,,,,,,,

,,,,ARCY,,6.46,,,

,,,,NRCY,,7.75,,,

,,,,Total,,14.22,,,

理论需氧量(取每日尖峰值),,,,,,,,,

TOR=,"16,849",lb/