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Organic matter removal under high loads in a fixed‐bed sequencing batch reactor with peach pit as carrier
Author(s) -
Soltani R. Darvishi Cheshmeh,
Rezaee A.,
Godini H.,
Khataee A. R.,
Jorfi S.
Publication year - 2013
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.11685
Subject(s) - sequencing batch reactor , organic matter , wastewater , chemistry , biomass (ecology) , pulp and paper industry , nuclear chemistry , batch reactor , environmental engineering , environmental science , biology , biochemistry , agronomy , organic chemistry , engineering , catalysis
In this study, the evaluation of organic matter removal at high loads from synthetic wastewater was performed using a Fixed‐bed Sequencing Batch Reactor (FSBR), in which peach pits were used instead of conventional carriers. The FSBR performance on organic matter removal at different organic loading rates (2–12 kg COD m −3 d −1 ) was significant. Organic matter removal efficiency was >90% at a loading rate less than 7.2 kg COD m −3 d −1 . When the organic loading was 12 kg COD m −3 d −1 , organic matter removal in the FSBR and SBR reactors reached 71.84 and 56.57%, respectively, indicating that the FSBR performance is significantly higher than the SBR reactor. According to the higher efficiency of SBR with media, this comparison shows that bio‐film bioactivity (7.06 ± 0.3 mg O 2 mg‐VSS −1 d −1 ) is significantly higher than suspended biomass bioactivity (2.92 ± 0.149 mg O 2 mg‐VSS −1 d −1 ). As the OLR increased from 3.4 to 10 kg COD m −3 d −1 , the observed yield (Y obs ), the specific biomass growth rate (μ overal ) and the endogenous decay rate (k d ) increased from 0.018 to 0.02 g VSS g −1 COD −1 , 0.1 to 0.2 d −1 , and from 0.082 to 0.067 d −1 , respectively, while the solid retention time (SRT) decreased from 40 to 19.8 d. © 2012 American Institute of Chemical Engineers Environ Prog, 32: 681–687, 2013