Repository of Research and Investigative Information

Repository of Research and Investigative Information

Ilam University of Medical Sciences

Application of novel Modified Biological Aerated Filter (MBAF) as a promising post-treatment for water reuse: Modification in configuration and backwashing process

Fri May 20 02:34:44 2022

(2017) Application of novel Modified Biological Aerated Filter (MBAF) as a promising post-treatment for water reuse: Modification in configuration and backwashing process. Journal of Environmental Management. pp. 191-199. ISSN 0301-4797

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Abstract

Biological Aerated Filter (BAF) reactors due to their plentiful biomass, high shockability, high efficiency, good filtration, availability and lack of need for large land areas, are enjoying from great importance in advanced wastewater treatment. Therefore, in this study, Polystyrene Coated by Sand (PCS) was produced as a novel media and its application in a modified down-flow BAF structure for advanced wastewater treatment was assessed in two steps. In step one, the backwash effluent did not return to the system, while in step two backwash effluent returned to increase the water reuse efficiency. The backwash process was also studied through three methods of Top Backwashing (TB), Bottom Backwashing (BB), as well as Top and Bottom Backwashing Simultaneously (TBBS). The results showed that return of backwash effluent had no significant effect on the BAF effluent quality. In the second step similar to the first one with slight differences, the residual average concentrations of TSS, BOD5, and COD at the effluent were about 2.5, 8.2, and 25.5 mg/L, respectively. Additionally, in step two, the mean volume of disposal sludge/volume of treated water (v(ds)/v(tw)) decreased a large extent to about 0.088. In other words, the water reuse has increased to more than 99.91. The backwash time in methods of TB and BB were 65 and 35 min, respectively; however, it decreased in TBBS methods to 25 min. The concentrations of most effluent parameters in this system are in concordance with the 2012 EPA Agriculture Standards, even for irrigation of Non-processed agricultural crops and livestock water consumption. (C) 2017 Elsevier Ltd. All rights reserved.

Item Type: Article
Creators:
CreatorsEmail
Nikoonahad, A.UNSPECIFIED
Ghaneian, M. T.UNSPECIFIED
Mahvi, A. H.UNSPECIFIED
Ehrampoush, M. H.UNSPECIFIED
Ebrahimi, A. A.UNSPECIFIED
Lotfi, M. H.UNSPECIFIED
Salamehnejad, S.UNSPECIFIED
Keywords: BAF Water reuse Advanced wastewater treatment Polystyrene coated by sand (PCS) media waste-water phosphorus removal baf nitrogen performance filtration media technology effluent reactor Environmental Sciences & Ecology
Divisions:
Page Range: pp. 191-199
Journal or Publication Title: Journal of Environmental Management
Journal Index: ISI
Volume: 203
Identification Number: https://doi.org/10.1016/j.jenvman.2017.07.062
ISSN: 0301-4797
Depositing User: مهندس مهدی شریفی
URI: http://eprints.medilam.ac.ir/id/eprint/198

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