Investigation of the Removal of 2-Nitrophenol Using Continuous Flow MSBR Reactor and Estimated Expiration

Document Type : Research Paper

Authors

Department of Chemistry, College of Scince, Yadegar-e-Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad University, Tehran, Iran

Abstract

In  this  research,  biological  removal  of  phenol  and  orthonitrophenol  (2NP)  pollutants  from wastewater  by  continuous  moving  bed  sequencing  batch  reactor  (MSBR)  was  studied.  The experiments were conducted in various operational conditions to find out the optimum level of the significant  parameters.  Best  performance  for  removal  of  Phenols  was  achieved  when  parameters were set as follows: pH=7, sludge volume=30%, influent volumetric flow rate=20 ml.min-1, number of carriers=150 and aeration flow rate= 12ml. min-1. At this optimum condition, 2NP concentration, Biochemical Oxygen Demand (BOD5) and Chemical Oxygen  Demand  (COD) indicators  reduced 84/7%, 94/8%and94%, respectively. Cost analysis for this treatment method was also assessed and final  cost  for  treatment  of  24  L  wastewater in  each  operation  was  evaluated  as  4/46$/L.  By increasing treatment sessions, fixed costs would reduce  and after treatment of 500  L wastewater, break-even point would achieve, which would turn the final costs down to 2.4 $/L.

Keywords