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Biodegradation of 2,4‐dichlorophenol in Packed‐Bed Biofilm Reactor: Effect of Hydraulic Retention Time, Biogenic Substrate, and Loading Rate
Author(s) -
Patel Bhishma P.,
Kumar Arvind
Publication year - 2016
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143016x14733681695726
Subject(s) - biodegradation , 2,4 dichlorophenol , hydraulic retention time , chemistry , packed bed , substrate (aquarium) , biofilm , bioreactor , environmental chemistry , degradation (telecommunications) , chemical engineering , environmental engineering , chromatography , environmental science , wastewater , bacteria , ecology , organic chemistry , geology , biology , telecommunications , paleontology , computer science , engineering
The removal of 2,4‐dichlorophenol (2,4‐DCP) by a pure culture of Bacillus endophyticus strain immobilized on ceramic balls was studied in a packed bed biofilm reactor (PBBR). The biodegradation of 2,4‐DCP was studied in fed‐batch and continuous mode and the effect of different parameters such as hydraulic retention time (HRT), biogenetic substrate concentration, and loading rate on the removal of 2,4‐DCP were evaluated. Field emission scanning electron microscope (FESEM) results established the biofilm formation on the ceramic beads. The maximum volumetric removal rate found to be 127.2 mg/L·d at loading rate of 172.8 mg/L·d with 73.6% degradation (12.5 hours of HRT, 90 mg/L of 2,4‐DCP, 0.2 g/L of peptone). The bioreactor showed more than 98% removal of 2,4‐DCP at loading rate of 115.2 mg/L·d at 12.5 hours of HRT and 0.2 g/L of peptone. Effect of peptone showed that lower peptone concentration increases the removal efficiency; however, some peptone is necessary to maintain the 2,4‐DCP removal efficiency.