پديد آورنده :
هاشم گرم دره، ابراهيم
عنوان :
بررسي عملكرد فيلترهاي كربني در حذف نيترات از زه آب زهكش هاي زيرزميني
گرايش تحصيلي :
آبياري و زهكشي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي
صفحه شمار :
چهارده،131ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
منوچهرحيدرپور،مصطفي زاده فرد
استاد مشاور :
فرهاد موسوي، مهدي قيصري، مهران شيراني
توصيفگر ها :
آبشوي نيترات , دنيتريفيكاسيون , بيورآكتورها , ذرات چوب , برگ نخل خرما , پوشال جو , پوسته شلتوك برنج
تاريخ نمايه سازي :
29/8/90
استاد داور :
جهانگير عابدي كوپائي، عبدالمجيد لياقت، نورا... مير غفاري
كد ايرانداك :
ID397 دكتري
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
132 PInvestigation of Biofilters Performance in Nitrate Removal from Subsurface Drainage Water Seyyed Ebrahim Hashemi Garmdareh sehashemi@gmail com College of Agriculture Isfahan University of Technology Isfahan 84156 83111 Iran 1st Manouchehr Heidarpour heidar@cc iut ac ir 2nd Behrouz Mostafazadeh Fard behrouz@cc iut ac ir 1st Sayed Farhad Mousavi mousavi@cc iut ac ir 2nd Mahdi Gheysari gheysari @cc iut ac ir 3 Mehran Shirvani shirvani@cc iut ac ir rd Isfahan University of Technology College of Agriculture Department of Water Engineering Isfahan 84156 83111 Iran Isfahan University of Technology College of Agriculture Department of Soil Science Isfahan 84156 83111 Iran AbstractAgricultural fields have been frequently identified as major contributors of nitrateleaching into surface and ground waters Tile drains can act as direct pathways transferring leached nitrate to surface water Bioreactor filters are useful for the removalof nitrate from drainage water however these filters require an external carbon supplyto sustain denitrification In this study four organic carbon sources including wood barley straw rice husks and date palm leaves were used to enhance denitrification andthe effects of water velocity and influent nitrate concentration on the nitrate removalwere evaluated Cumulative nitrate removal was highest for the date palm leaf treatmentand was lowest for the wood treatment The effects were in decreasing order for datepalm leaves barley straw rice husks and wood respectively Performance of thebiofilters was improved with increasing influent nitrate concentration and decreasingwater velocity allowing for high nitrate removal rates to be achieved The resultsshowed that all the treatments reduced the effluent nitrate concentration below theUSEPA maximum contaminant level for drinking water 45 mg L 1 at the end of thestudy With increasing the water velocity available C and denitrifying enzyme activitydecreased Decreasing the available C and denitrifying enzyme activity with increasingof the water velocity demonstrated that water velocity plays an important role in the denitrification performance of the system Key Words Denitrification Nitrate removal Carbon substrate Drainage water Denitrification rate IntroductionNitrogen is a naturally occurring element that is essential to plant growth and cropproduction It is estimated that up to 60 of applied nitrogen is leached out of the rootzone 4 In agricultural regions effluent from drainage systems has been identified as amajor source of nitrate which is funneled in to tile drains and results in increased nitratein surface waters where it often results in problems such as eutrophication and unsafe
استاد راهنما :
منوچهرحيدرپور،مصطفي زاده فرد
استاد مشاور :
فرهاد موسوي، مهدي قيصري، مهران شيراني
استاد داور :
جهانگير عابدي كوپائي، عبدالمجيد لياقت، نورا... مير غفاري
