Efficiency studies of modified IFAS-OSA system upgraded by an anoxic sludge holding tank.

Autor: Fazelipour M; Department of Environmental Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran., Takdastan A; Environmental Health Department, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran., Borghei SM; Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran., Kiasat N; Department of Medical Mycology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran., Glodniok M; Department of Water Protection, Central Mining Institute, Katowice, Poland. mglodniok@gig.eu., Zawartka P; Department of Water Protection, Central Mining Institute, Katowice, Poland.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2021 Dec 17; Vol. 11 (1), pp. 24205. Date of Electronic Publication: 2021 Dec 17.
DOI: 10.1038/s41598-021-03556-6
Abstrakt: An upgraded integrated fixed-film activated sludge-oxic settling anoxic (IFAS-OSA) system is a new technology for reducing nutrients and excess sludge. The results showed that the average TN removal efficiency of the IFAS-OSA system was gradually increased up to 7.5%, while the PO 4 -3 -P removal efficiency increased up-to 27%, compared with that of the IFAS system. The COD removal efficiency of the IFAS-OSA system was slightly increased up-to 5.4% and TSS removal efficiency increased up to 10.5% compared with the control system. Biomass yield coefficient (Y obs ) in the IFAS and IFAS-OSA systems were 0.44 and 0.24 (gr MLSS/ gr COD). Hence, sludge production decreased by 45%. The average SVI was decreased by 48% in IFAS-OSA system compared with IFAS. This study demonstrated the better performance of the IFAS-OSA system compared to that of the IFAS system.
(© 2021. The Author(s).)
Databáze: MEDLINE
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