Premium
Simultaneous organic carbon and nitrogen removal in an SBR controlled at low dissolved oxygen concentration
Author(s) -
Dangcong Peng,
Bernet Nicolas,
Delgenes JeanPhillipe,
Moletta Rene
Publication year - 2001
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.419
Subject(s) - sequencing batch reactor , nitrogen , chemistry , wastewater , carbon fibers , pulp and paper industry , carbon to nitrogen ratio , dissolved organic carbon , oxygen , total organic carbon , segmented filamentous bacteria , chemical oxygen demand , batch reactor , sewage treatment , environmental chemistry , activated sludge , environmental engineering , environmental science , materials science , organic chemistry , catalysis , composite number , engineering , composite material
Simultaneous organic carbon and nitrogen removal was studied in a sequencing batch reactor (SBR) fed with synthetic municipal wastewater and controlled at a low dissolved oxygen (DO) level (0.8 mg dm −3 ). Experimental results over a long time (120 days) showed that the reactor achieved high treatment capacities (organic and nitrogen loading rates reached as high as 2.4 kg COD m −3 d −1 and 0.24 kg NH 3 ‐N m 3 d −1 ) and efficiencies (COD, NH 3 ‐N and total nitrogen removal efficiencies were 95%, 99% and 75%). No filamentous bacteria were found in the sludge even though the reactor had been seeded with filamentous bulking sludge. Instead, granular sludge, which possessed high activity and good settleability, was formed. Furthermore, the sludge production rate under low DO was less than that under high DO. Significant benefits, such as low investment and less operating cost, will be obtained from the new process. © 2001 Society of Chemical Industry