化學(xué)生物絮凝-懸浮填料床組合工藝優(yōu)化研究.pdf

1、【按要】摘要為了適應(yīng)城市污水排放量越來越大且水質(zhì)變化日益復(fù)雜的情況，在總結(jié)現(xiàn)有處理!、藝的基礎(chǔ)上，提出了一種新的污水處理〔藝一化學(xué)生物絮凝一懸浮填料床組合_1一藝并進(jìn)行了最佳運行工藝參數(shù)的研究。研究中，在實驗室試驗了四種絮凝劑(Al2(SO4)3Fe2(SO4)3PACPAFC)的處理效果以及與三種助凝劑(硅膠、聚乙烯醇、PAM)復(fù)配使用的效果，在十種不同的工況條件F進(jìn)行了_L藝的中試試驗研究。主要得出了以卜結(jié)論:I)實驗室試驗中，在僅

2、投加絮凝劑的情況FPAC與PAFC的效果要優(yōu)于A12(SO4)3和Fe2(SO4)3。當(dāng)PAC的投加量達(dá)到26.4mgL〔以AIO，計)時效果較優(yōu)，此時出水NH3NTPSSCODPO幾P和SCOD濃度分別為20.1mg1L0.3mgL12mgL41.8mgL0.13mgL41136.6mgL，去除率分別為，.3%86.8%95.2%68.1%90.3%和18.3%41PAFC的投加量達(dá)到26.4mgL(以A1203計)時效果較優(yōu)，此時出

3、水NH3NTPSSCODP043P和SCOD分別為14.2mgL0.58mgL8mg[L57.3mgfL0.20mgL和56.8mgL去除率分別為9.6%78.2%88.2%68.5%86.8%和12.1%.2)PAFC和PAC與PAM聚乙烯醇、硅膠復(fù)配使用時，由試驗結(jié)果得出PAFC和PAC與PAM復(fù)配使用的效果最好、聚乙烯醇次之、硅膠的助凝效果最差的結(jié)論。當(dāng)PAC投加量為23.1mglL(以AIO:計)，聚乙烯醇投加量為0.8m叭時處

4、理效果較好，此時出水NH3NTPP04PSSCOD和SCOD濃度為23.9mgL0.38mglL0.19mgL4mgL45.7mgL和43.1mgL，去除率分別為14.9%86.5%89.0%95.0%73.9%和35.1%當(dāng)PAFC投加量為10.6mgL以A1203計)，PAM投加量為1.2m叭時處理效果較好，此時出水NHN:TPPO`PSSCOD和SCOD濃度為15.2mgfL0.59mgL0.47mgL14mgL69.7mgL和5

5、9.6mgL，去除率分別為30.7%79.3%80.0%87.1%71.0%和10.1%0根據(jù)小試結(jié)果選擇了PACPAFC作為絮凝劑和PAM作為助凝劑進(jìn)行了中試研究，得到以卜結(jié)論:1)當(dāng)PAFC加藥量為80mlLPAM投加量為0.5mgL時效果較優(yōu)，此時一沉出水CODTPSS濃度分別為33.6mgL0.42mgL16mgL，去除率分別為72.7%81.6%81.7%二沉出水CODTPSS濃度分別為24.2m叭、0.26mgL9mgL，去

6、除率分別為80.2%88.6%90.0%[況條件為PAM投加點在第三格首端，污泥回流比為33.3%左右，期間水溫27.830.30C(平均為29.0C)絮凝池MLSS濃度為1.52.0gL左右，原水、絮凝池第一格、第二格、第二格、一沉池、脫氮池、一:沉池的DO分別為0.15一0.31mgL.2.81一3.09mgL2.432.89mgL1.992.43mgL0.200.39mgL0.95一1.16mgL1.04一1.28mgL絮凝池曝氣

7、量分別為3.7m3h2.5mh0.9mha2)在水力停留時間分別為2.3h和4.1h的情況下，氣水比為3:1的L況對于懸浮填料床的NH3一去除率都兒乎已經(jīng)達(dá)到了最高水平，最高去除率可達(dá)99%，氣水比分別為3:12.5:12:1的三個1.況曝氣量的減少與NHsN去除率的卜降兒乎成線性關(guān)系，當(dāng)氣水比繼續(xù)減【周濟大學(xué)工學(xué)碩士學(xué)位論夫】[Abstract]AbstractTherearemoreandcomplex.Tofitthesemore

8、municipalconditionsthewastewaterdischargedandthewaterstudyfocusedonthechemicalqualityismoreandbiologicalflocculationsuspendedpackedbedprocessunderthebaseofexistingwastewatertreatmentprocesses.Inpilottestsundertenkindsofw

9、orkingconditionsthetreatmenteffectivenessoffourkindsflocculantsandthreekindscoagulantaidswasstudiedinjartestfromwhichtheconclusionsaredrawnoutasfollows.1)Inthejartestwhenflocculantswereonlyaddedtreatmentefectivenessofpol

10、yvinylalcohol(PAC)andpolyaluminiumferricchloride(PAFC)arebothbeterthanthatofaluminumsulfate(A12(SO4萬)andferricsulfate(Fe2(S04)3)respectively.InthecaseofdosageofPACat26.4mgL(computedbyA1z03)beterefectivenesswasget.Underth

11、isconditionconcentrationsofNH3NTPSSCODPOg3PandSCODinefluentwere20.1mgL0.3mgL12mgL41.8mgL0.13mg幾and36.6mgLrespectivelyandtheircorrespondingremovalratioswere24.3%86.8%95.2%68.1%90.3%and18.3%respectively.Inthecaseofdosageof

12、PAFC(AIZ03)in26.4mgLconcentrationsofNH3NTPSSCODP04PandSCODinefluentwere14.2mgL0.58mgL8mgL57.3mgL0.20mgLand56.8mgLrespectivelyandtheircorrespondingremovalratioswere9.6%78.2%88.2%68.5%86.8%and12.1%respectively.2)WhenPAFCan

13、dPACwereusedasflocculantscooperatingwithpolyacrylamide(PAM)PolyvinylAlcohol(PVA)andactivatedsilica(AS)thetestresultsshowedthatthetreatmenteffectofPAFCandPACcooperatingwithPAMwasbestandthatofPolyvinylAlcoholwasbetterthant

14、hatofSilicaGel.WhenthedosagesofPACwas23.1mgLthebesttreatmentefectwasobtainedinthecaseofPAMat0.8mgLwhichshowedthattheaverageconcentrationsofNH3NTPPOPSSCODandSCODineffluentwere23.9mgL0.38mgL0.19mgL4mgL45.7mgLand43.1mgLresp

15、ectivelyandthecorrespondingremovalratioswere14.9%86.5%89.0%95.0%73.9%and35.1%respectively.WhenthedosageofPAFCwas10.6mgLthebesttreatmentefectwasobtainedinthecaseofPAMat]2mgLwhichshowedthataverageconcentrationsofNH3NTPP643

16、“PSSCODandSCODineffluentwere15.2mgL0.59mgL0.47mgL14mgL69.7mgLand59.6mg幾respectivelyandthecorrespondingremovalratioswere30.7%79.3%80.0%87.1%71.0%and10.1%respectively.OnthebaseofjartestapilottestwascarriedusingcoagulantPAF

17、CPACandcoagulantaidPAMfromwhichtheconclusionsaredrawnoutasfollows:1)TheoptimizingstudyresultsshowedthatatflocculationtankPAFCdosage=80mlLandPAM0.5mgLtheaverageconcentrationsofCODTPandSSineffluentwere33.6mgL0.42mg幾and16mg