Page 158 - 《水资源与水工程学报》2025年第1期
P. 158

!36 "!1 #                         & ' ( ) & * + , -                               Vol.36No.1
               2025 $ 2 %               JournalofWaterResources&WaterEngineering                 Feb.,2025

            DOI:10.11705/j.issn.1672-643X.2025.01.17


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                 KLMNO:X705   PQRST:A    PUVO:1672643X(2025)01015409

                       Comparativestudyontheapplicationofbiologicalenzymesto
                                       riverandlakesedimentdewatering

                                       1
                                                                                             1
                                                 1
                                                               2
                                                                             1
                           YUANYuan,LIUSisi,CUIYongtao,LAIZhilong,LIAODexiang
                       (1.CollegeofOceanScienceandEngineering,ShanghaiMaritimeUniversity,Shanghai201306,China;
                       2.CCCCShanghaiWaterwaySurvey,DesignandResearchInstituteCo.,Ltd.,Shanghai200120,China)
                 Abstract:Toaddresstheproblemofdewateringtreatmentofriverandlakesediment,biologicalenzymes
                 suchascommonlysozyme , α amylaseandneutralproteasewereusedforconditioning.Correspondingly,
                 theinfluenceofbiologicalenzymecontent,mudconcentration,andconditioningtimeonthedewatering
                 performanceofsedimentwereinvestigated.Furthermore ,themoisturecontentofthemudcakeandthe
                 specificresistanceofthesludgeafterbiologicalenzymetreatmentweremeasuredtoinvestigatethedewate
                 ringeffectsofriverandlakesediment.Theresultsshowedthatthethreeselectedenzymescouldeffective
                 lyimprovethedewateringperformanceofriverandlakesediment ,andtheirconditioningeffectswerein
                 theorderof α amylase>neutralprotease>lysozyme.Notably,whenthe α amylasecontentwas2mg/g,
                 themudconcentrationwas11% andtheconditioningtimewas0.5h,themoisturecontentofthesedi
                                                                                                  9
                 mentwasreducedby31.72%,andthecorrespondingspecificresistancewasreducedby167×10cm/g.
                 Scanningelectronmicroscopy(SEM)resultsshowedthatafterthetreatmenttheparticlesizeofthesedi
                 mentbecamesmallerandtheintergranularporesincreasedbysizeandnumber ,whichinturnsignificant
                 lyincreasedthewaterpassagesinthemud ,therebyimprovingthedewateringperformanceofthesedi
                 ment.
                 Keywords:biologicalenzyme;dewatering;moisturecontent;specificresistanceofsludge;riverand
                 lakesediment

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