Phosphates are a major cause of eutrophication and growth of algal blooms in surface waters. The current study investigated phosphorus removal from sludge centrate effluent (SCE) of a municipal wastewater plant by packed-bed electrocoagulation (EC) reactor. Distinctively, iron (Fe), aluminum (Al) and Al-Fe hybrid scrap anodes were used. The influence of initial pHi, applied current and packed anode bed density were evaluated. Phosphorous removal efficiency of 99.99 ?as obtained at applied current of 0.20A with anode bed densities of 0.18 kg Al/m3 (pHi 5.0) and 0.48 kg Fe/m3(pHi 7.0). Optimum operating costs entailing sludge disposal, chemical, energy and electrode consumption were calculated as 0.379 US $/m3 (6.04 $/kg PO4-P) for Fe scrap, 0.494 US $/m3 (9.46 $/kg PO4-P) for Al scrap and 0.501 US $/m3 (9.59 $/kg PO4-P) for Al-Fe hybrid scraps. Phosphorus removal per electrochemically generated metal was 191.22 mg P/g Al, 104.88 mg P/g Fe, and 61.08 mg P/g (Al Fe). The molar metal to phosphorus ratio at optimum conditions were calculated as 5.41, 3.97 and 7.65 mol/mole for Al, Fe and Al-Fe, respectively. The key mechanisms for phosphorus removal were metal-phosphorus precipitation and adsorption. Herein, metal scrap anodes have been proved effective for phosphorous removal from SCE. (c) 2021 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
Publication Name (dc.title) | Phosphorous removal from anaerobically digested municipal sludge centrate by an electrocoagulation reactor using metal (Al, Fe and Al-Fe) scrap anodes |
Author/s (dc.contributor.yazarlar) | Mehmet Kobya, Philip Isaac Omwene, Sanaz Mohammadzadeh Sarabi, Sadullah Yildirim, Zubeda Ukundimana |
Publication type (dc.type) | Makale |
Language (dc.language) | İngilizce |
Publication year (dc.date.issued) | 2021 |
National/International (dc.identifier.ulusaluluslararasi) | Uluslararası |
Source (dc.relation.journal) | Process Safety and Environmental Protection |
Volume/Issue (dc.identifier.volume) | 152 |
Page (dc.identifier.startpage) | 188-200 |
ISSN/ISBN (dc.identifier.issn) | ISSN: 0957-5820; Online ISSN: 1744-3598 |
Publisher (dc.publisher) | Elsevier |
Databases (dc.contributor.veritaban) | Web of Science Core Collection |
Databases (dc.contributor.veritaban) | Sciencedirect |
Databases (dc.contributor.veritaban) | Scopus |
Index Type (dc.identifier.index) | SCI Expanded |
Index Type (dc.identifier.index) | Scopus |
Impact Factor (dc.identifier.etkifaktoru) | 6,158 / 2020-WOS / 5 Year: 6,046 |
Abstract (dc.description.abstract) | Phosphates are a major cause of eutrophication and growth of algal blooms in surface waters. The current study investigated phosphorus removal from sludge centrate effluent (SCE) of a municipal wastewater plant by packed-bed electrocoagulation (EC) reactor. Distinctively, iron (Fe), aluminum (Al) and Al-Fe hybrid scrap anodes were used. The influence of initial pHi, applied current and packed anode bed density were evaluated. Phosphorous removal efficiency of 99.99 ?as obtained at applied current of 0.20A with anode bed densities of 0.18 kg Al/m3 (pHi 5.0) and 0.48 kg Fe/m3(pHi 7.0). Optimum operating costs entailing sludge disposal, chemical, energy and electrode consumption were calculated as 0.379 US $/m3 (6.04 $/kg PO4-P) for Fe scrap, 0.494 US $/m3 (9.46 $/kg PO4-P) for Al scrap and 0.501 US $/m3 (9.59 $/kg PO4-P) for Al-Fe hybrid scraps. Phosphorus removal per electrochemically generated metal was 191.22 mg P/g Al, 104.88 mg P/g Fe, and 61.08 mg P/g (Al Fe). The molar metal to phosphorus ratio at optimum conditions were calculated as 5.41, 3.97 and 7.65 mol/mole for Al, Fe and Al-Fe, respectively. The key mechanisms for phosphorus removal were metal-phosphorus precipitation and adsorption. Herein, metal scrap anodes have been proved effective for phosphorous removal from SCE. (c) 2021 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved. |
URL (dc.rights) | https://www.sciencedirect.com/science/article/abs/pii/S0957582021002937?via=ihub |
DOI (dc.identifier.doi) | 10.1016/j.psep.2021.06.003 |
Faculty / Institute (dc.identifier.fakulte) | Mühendislik Fakültesi |
Department (dc.identifier.bolum) | Çevre Mühendisliği Bölümü |
Author(s) in the Institution (dc.contributor.author) | Mehmet KOBYA |
Kayıt No (dc.identifier.kayitno) | BL068871E8 |
Record Add Date (dc.date.available) | 2021-09-15 |
Notes (Publication year) (dc.identifier.notyayinyili) | August 2021 |
Wos No (dc.identifier.wos) | WOS:000678332500005 |
Subject Headings (dc.subject) | phosphorus |
Subject Headings (dc.subject) | electrocoagulation |
Subject Headings (dc.subject) | al and Fe scraps |
Subject Headings (dc.subject) | sludge centrate |