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1、超濾濃縮、純化的最佳工藝為：使用截留分子量為30KDa的陶瓷膜，跨膜壓力為0.16MPa,最適溫度為35°C。噴霧干燥的最佳工藝為：果膠濃度為15%,進風(fēng)溫度為220°C,進樣速度為3L/ho采用精制工藝一和工藝二，果膠精制收率分別為84.9%和91.7%,所得果膠各項質(zhì)量指標均達到或優(yōu)于國家標準，不同批次間質(zhì)量差異小于5%,可穩(wěn)定地獲得高品質(zhì)果膠。關(guān)鍵詞：果膠聯(lián)合提取生物提取精制工藝質(zhì)量控制AbstractResourceofthepeeloforangeinChinaisrich,which
2、isnotmadegooduseendingupwithenvironmentalpollutant.Thus,tousethishugeamountofresourceofpeeltoproducewidelyusedandhighlydemandedpectinholdsgreateconomicandsocialinterests.Thispaperestablishedjointandbiologicalproceduresofpectinextractionfromthepeelofo
3、range,andsystematicallystudiedtherefiningprocessofpectin,withefficientextraction,cleanproductionandqualitycontrolofpectinachievedattheend.Themainresultsobtainedinthispaperareasfollows:(1)Ajointextractionofpectinwasdeveloped.Namely,therawmaterialwaspr
4、etreatedwithasteamexplosion,whichwasthenextractedwithhydrochloricacidandcarbonicacidataratioof1:2.Theextractionyieldofpectinreachesashighas83.6%whentheextractiontimeis2.5h,theextractiontemperatureis80°C?extractionagentpHis2.1，andsolid-liquidratiois1:
5、30.Undertheabovecondition,degreeofesterificationoftheresultingpectinis56%,whichisbeneficialtopreparelowmethoxylpectin.Besides,theCODandBODoftheextractionwastewateraredecreasedmorethan55%and30%,respectively,whichisveryfavorabletobeappliedinpracticalpr
6、oduction.(2)BiologicalextractionwasstudiedandtheAspergillusficuumRBB-10wasdeterminedasthesuitablestrain.Theoptimalconditionforbiologicalextractionprocesswasdetermined.Namely,theextractiontimeis36h,theextractiontemperatureis25°C,pHis6.0,andthesolid-li
7、quidratiois1:15?Undertheseconditions,enzymaticactivityofprotopectinaseandpectinaseinthefermentationbrothare668.50U/mLand502.90U/mL,respectively.Meanwhile,theextractionyieldofpectinis72」％withsignificantlyhigherqualitythanthatofobtainedfi-omconventiona
8、lextractionmethodusingacid?Moreimportantly,thisisprocesswithlowenergyconsumption,lowcost,andlittleenvironmentalpollution.(3)Thepurifyingandrefiningprocedureofpectinwassystematicallystudiedandmethodsforqualityanalysisofpectinwereestablished.Twodiffere
