微污染飲用水生物過(guò)濾試驗(yàn)研究.pdf

1、湖南大學(xué)碩士學(xué)位論文微污染飲用水生物過(guò)濾試驗(yàn)研究姓名：何元春申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：市政工程指導(dǎo)教師：余健2002.6.29AbstractThisartioleexaminestheapplicationofbiofiltrationasfinalprocessforslightly—pollutedwatertreatmenttocurrentproblemsofwidelypollutedsourcewaterBiofiltrat

2、ion，possessingtheadvantageofremovingorganicmattersandturbidityinthesamefiiter，isaneffectiveandeconomicoltechnologyFurtherstudyhasbeenconductedtoevaluatetheperformanceofbiofiitrationremovingorganicmatters、NH一N、Fe、Mnandtur

3、biditythroughpilot—plantexperimentsFurthermore，severalfactorsconsideredaffectingbiofiitrationprocesshavebeenexamined，theyare：emptycontacttime(EBCT)、watertemperature、flocs、backwashandshutdownofbiofiitersTheResultsofexperi

4、mentonbiofiitrationperformanceshowthatbiofiltrationcanremovetheorganicmatters、NFN、Fe、MnaswellasturbidityintheSamefiltereffectiyelYWhenwatertemperatureis8℃，filtrationrateis8m／h，theremovalofassimilableorganiccarbon(AOC)、bi

5、ologicallydegradableorganiccarbon(BDoc)inbiofiltersare592％～842％and413％～650％separatelywhileGAC—sandfiiteraveragebestremoval，effluentAOCislessthan50pg／L，whichcanachievebiologicallystablewaterbetterBiofilterscanalsomeetther

6、equirementofeffluenttubidityWheninfluentturbidityisbellow5NTU，theeffluentturbidityofbiofiitrationcanmaintainlessthan01NTUforalongtimeIntherageof45min～18min，increasingEBcTwillimprovetheperformanceofbiofiitersbutlessthanpr

7、oportionally：biofiltrationbehavewellinhighertemperature：theaccumulationofflocsinbiofiItermaybeactasadiffusionbarrierforbiodegradablecompounds，thusbringsomedisadvantageforbiofiltration：backwashwithnonchlorinatedwaterhasle