滤池反冲洗废水回用生产性试验研究_柯水洲(2)

滤池反冲洗废水直接回收到反应沉淀池,杂质主要在沉淀池中沉淀,作为沉淀池的污泥排出,对沉淀池排泥的处理笔者将另文介绍,最终实现水厂生产废水的“零”排放。

参考文献

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图1　周边进水辐流式沉淀池示意图

两个半圆(见图2),起始端的布水孔a处的孔口流量为qa,末端布水孔b处的孔口流量为qb,全部孔口中以qa和qb相差最大,如达到如下要求:

b

≥0.95qa

则可认为布水均匀性很好。

设辐流池中沉淀区水位标高为H0,布水槽中

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★作者通讯处:柯水洲,袁辉洲　410082,湖南大学土木工程系

李　宁,曾富益　长沙市自来水公司

　收稿日期:1999 1 25

(1)

　Vol.　.5

WATER

&WASTEWATERENGINEERING

CONTENTS

Vol.25No.5May1999

PreliminaryComparisonofPackageMaterialsUsedinBiologicalContactOxidationProcess

　toTreatSlight-PollutedSourceWater………………………………………………………………………MeiXiangetal(1)

　　Abstract:ThestructuralfeaturesandperformancesofbiologicalcontactoxidationprocesspackedwiththreedifferentkindsofmaterialsYDT,TAandPWTtotreatslight-pollutedrawwaterarediscussedandcomparedinpreliminary.There-sultsshowthateveryoneofthethreewillbesuitableforbiologicalcontactoxidationprocesstotreatslight-pollut-edrawwa-terandsimilarremovalsofammonianitrogenwereobtainedunderthesameoperatingconditionandwiththeapproximatespecificsurfaceareaofpackagematerialbeinginstalled.Furthermoreitisnecessarytostudytheproblemssuchastheopti-mumarrangementofpackagematerialsinsidethereactorandthechangesoftheworkingstatusofthepackagematerialatdifferentqualityofrawwater.PilotInvestigationonReuseofFilterBackwashWater……………………………………………………KeShuizhouetal(4)

　　Abstract:FieldexperinentsonbenchscaleandpilotplantlevelshavebeendoneinawaterworkswhichtakesrawwaterfromXiangjiangRivertoinvestigatetherecyclingandreuseoffilterbackwashwater.Theresultsshowthatthedirectrecy-clingofbackwashwatertothereactiontankmakesnotonlybotheconomicalandenvironmentalbenefitsforwatersourcesaving,butalsotheimprovementofthereactionandsedimentationprocess.WaterDistributionDesignofPeripheralInletRadialSedimentationTank……………………………………………JiHong(7)

　　Abstract:Aguidelineforthedesignofwaterdistributionsystemofperipheralinletradialsedimentationtankhasbeenrecommendedbytheauthoronthebasisoffluidmechanics.Attentionsshallbefocussedonthewaterheadlossh2intheinlet

waterdistributingcanal.whichshouldnotexceedover10%oftheheadlossh1atthedistributingorifices.Alsothecalcula-tionmethodsoftheheadlossesinthedistributingcanalandtheorificesaredescribed.

ExplanationandMaintenanceofCalumetWRP…………………………………………………………………ZhouYiping(10)　　Abstract:Theevloutionandmaintenanceintheforegoing70yearsofCalumetWRP,acomponentbelongingtoMetropolitanWaterReclamationDistrictofGreatChicagoarepresented.TheOrganicConstituentsinWaterandTheirImpactonDrinkingWaterQuality………………………LiXiaodongetal(12)

　　Abstract:Theauthorsdiscussedthetypesoforganicconstituentsinsurfacewatersandtheirimpactondrinkingwaterquality.Themicro-pollutantsfromwastewaterandthedisinfectionby-productshavedirectimpactonthedringingwaterqualityandarethemainorganiccompoundstobecontrolled.Thenaturalorganicsubstancescauseindirectimpactonwaterqualitybyincreasingthecoagulantdosage,theresiduesofaluminumandthedisinfectionby-products.Thealgaecausede-creaseofthecoagulantandfiltratinefficiencyandodorproblems.StudyonNitrificationandDenitrificationofSludgeinHybridBiologicalReactor……………………………WuLiboetal(15)　　Abstract:Sewagewastreatedbyusingthehybridreactorwithporoussuspendedcarriers(polyurethanefoam)asmediaandacomparisionwithconventionalreactorwasmade.Thestudyfocusedonthecapabilityofnitrificationanddenitrificationofthesludgeinthereactors.TheresultshowedthatthehybridreactorhadhighersludgeconcentrationandbetterremovalofpollutantCOD,NH3-NandTNthanthecontrolreactor.WhentheorganicandNH3-Nloadingswerelow,capabilityof

nitrificationanddenitrificationofthesludgewasclose.Astheloadingswereincreased,thecapabilityofnitrificationanddeni-trificationofthesludgebecamedeprssed,butthatofattachedsludgebecameenhanced.Capabilityofdenitrificationofsludgeinthehybridreactorwasmuchgreaterthanthatofsludgeinthecontrolreactor.