12249

11220

كارشناسي ارشد

محيط زيست

اصفهان: دانشگاه صنعتي اصفهان، دانشكده عمران

1395

سيزده، 88ص.: مصور، جدول، نمودار

ص. ع. به فارسي و انگليسي

هستي هاشمي نژاد، امير تائبي

علي دهنوئي

حميدرضا پورزماني، مسعود طاهريون

1395/12/08

كتابنامه

عمران

مهندسي عمران

ID11220

Performance of Anoxic Oxic Reactor Using Electro Fenton Process in Nitrogen Organic Matter Removal from Municipal Wastewater Sayyed Ali Mirian sa miriyan@cv iut ac ir Department of Civil Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language PersianDr Hasti Hasheminejad hhasheminejad@cc iut ac irProf Amir Taebi amirth@cc iut ac irAbstractThe sewage has a lot of pollutants The existence of high density nutrients and organic materials arethe most problematic issues of sewage This research deals with the purification of organic materialsand nitrogen from sewage by the use of biological and electro fenton processes at the same time Inbiological process one anoxic reactor and three oxic reactors are used The volume of each reactoris 6 liter In this process recycling from oxic to anoxic reactor is substituted by recycling from thesludge of settling tank to the anoxic reactor After 70 days of startup the system the anoxic reactorlocation was changed and it was placed in the oxic reactor In each stage the removal efficiency ofChemical Oxygen Demand COD ammonia was investigated In the pre anoxic the efficiency ofCOD and ammonia removal from wastewater were 75 and 95 respectively The COD andammonia removal efficiency from wastewater in the post anoxic were 78 and 94 respectively Inthe next step of this experiment to investigate the treatability of raw wastewater by electrofentonprocess and improvement of biological removal efficiency effluent from the biological process werestudied by electro fenton process In electro fenton process some parameters such as H2O2 volume current density and pH were considered in three levels also time was considered in four level aseffective and important The effect of these parameters on COD and ammonium and nitrate removalefficiency were studied This process was done by the use of Response Surface Methodology RSM and Design Expert Sofware version 10 0 3 1and all the effective parameters were detected In Theoptimization process raw wastewater removal efficiency of COD nitrate and ammonia weremeasured 83 50 and 46 respectively Also in the optimized condition of the process in treatedwastewater the efficiency of COD nitrate were equal to 71 and 23 respectively At the end of theprocess the coliform test is done in order to study the effect of coliform removal from sewage on thewastewaters of biologic and combined processes The result showed that the amount of coliform inraw sewage reduced from 230000 MPN 100ml to 360 MPN 100 ml in biological process and 61MPN 100 ml in electro fenton process Key Words Anoxic Oxic Electro Fenton Nitrate Ammonium COD Response SurfaceMethodology RSM

هستي هاشمي نژاد، امير تائبي

علي دهنوئي

حميدرضا پورزماني، مسعود طاهريون