Organic matter removal under high loads in a fixed‐bed sequencing batch reactor with peach pit as carrier. Issue 3 (10th August 2012)

• Record Type: Journal Article
• Authors: Soltani, R. Darvishi Cheshmeh; Rezaee, A.; Godini, H.; Khataee, A. R.; Jorfi, S.
• Is Part Of: Environmental progress & sustainable energy. Volume 32:Issue 3(2013:Oct.)
• Page Start: 681
• Page End: 687
• Publication Date: 2012-08-10
• Subjects: Environmental engineering -- Periodicals; Sustainable engineering -- Periodicals; Environmental chemistry -- Periodicals; 333.7
• DOI: 10.1002/ep.11685
• Languages: English
• ISSNs: 1944-7442

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>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<sup>−3</sup> d<sup>−1</sup>) was significant. Organic matter removal efficiency was >90% at a loading rate less than 7.2 kg COD m<sup>−3</sup> d<sup>−1</sup>. When the organic loading was 12 kg COD m<sup>−3</sup> d<sup>−1</sup>, 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<sub>2</sub> mg‐VSS<sup>−1</sup> d<sup>−1</sup>) is significantly higher than suspended biomass bioactivity (2.92 ± 0.149 mg O<sub>2</sub> mg‐VSS<sup>−1</sup> d<sup>−1</sup>). As the OLR increased from 3.4 to 10 kg COD m<sup>−3</sup> d<sup>−1</sup>, the observed yield (Y<sub>obs</sub>), the specific biomass growth rate (μ<sub>overal</sub>) and the endogenous decay rate (k<sub>d</sub>) increased from 0.018 to 0.02 g VSS g<sup>−1</sup> COD<sup>−1</sup>, 0.1 to 0.2 d<sup>−1</sup>, and from 0.082 to 0.067 d<sup>−1</sup>, 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</p> </abstract>