Comparison of anaerobic pre-treatment and aerobic post-treatment coupled to photo-Fenton oxidation for degradation of azo dyes
(2011) In Journal of Photochemistry and Photobiology, A: Chemistry 224(1). p.55-61- Abstract
- Photo-Fenton oxidation was used for treatment of synthetic textile wastewater as stand alone treatment, as pre-treatment before aerobic biological treatment and as post-treatment after anaerobic biological treatment. The processes were compared with regards to decolorization, chemical oxygen demand (COD) reduction and chemical consumption. When applying photo-Fenton alone for treatment of Remazol Red RR (100 mg/l), optimal conditions were 3.0 mM H2O2 and 0.25 mM Fe2+. These conditions resulted in complete decolorization and a residual COD of 2.9 mg/l. When reducing the H2O2 dose to 1 mM, residual COD was 22 mg/l. In the combined photo-Fenton/aerobic treatment complete decolorization and COD removal was achieved at 3 mM H2O2 and 0.25 mM... (More)
- Photo-Fenton oxidation was used for treatment of synthetic textile wastewater as stand alone treatment, as pre-treatment before aerobic biological treatment and as post-treatment after anaerobic biological treatment. The processes were compared with regards to decolorization, chemical oxygen demand (COD) reduction and chemical consumption. When applying photo-Fenton alone for treatment of Remazol Red RR (100 mg/l), optimal conditions were 3.0 mM H2O2 and 0.25 mM Fe2+. These conditions resulted in complete decolorization and a residual COD of 2.9 mg/l. When reducing the H2O2 dose to 1 mM, residual COD was 22 mg/l. In the combined photo-Fenton/aerobic treatment complete decolorization and COD removal was achieved at 3 mM H2O2 and 0.25 mM Fe2+, while 9 mg/l of residual COD remained at the H2O2 concentration 1 mM. When applying photo-Fenton as post-treatment after the anaerobic step, the residual COD was 14 mg/l independent of the H2O2 concentration being set to 1 or 3 mM, however the Fe2+ concentration needed to be increased to 2 mM, due to complex formation with the phosphate added as a macronutrient. Phytotoxicity tests showed higher residual toxicity after the photo-Fenton treatment alone than after the combined processes. Our results thereby show that incorporation of a biological step leads to improved mineralization and reduced residual toxicity at lower H2O2 doses. (C) 2011 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2233580
- author
- Jonstrup, Maria LU ; Punzi, Marisa LU and Mattiasson, Bo LU
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Aerobic, Anaerobic, Azo dyes, Combined process, Photo-Fenton
- in
- Journal of Photochemistry and Photobiology, A: Chemistry
- volume
- 224
- issue
- 1
- pages
- 55 - 61
- publisher
- Elsevier
- external identifiers
-
- wos:000297189600008
- scopus:80055018028
- ISSN
- 1873-2666
- DOI
- 10.1016/j.jphotochem.2011.09.006
- language
- English
- LU publication?
- yes
- id
- dd5dcb13-9e69-476a-86e6-fdb6bac85135 (old id 2233580)
- date added to LUP
- 2016-04-01 14:18:16
- date last changed
- 2022-03-21 23:12:13
@article{dd5dcb13-9e69-476a-86e6-fdb6bac85135,
abstract = {{Photo-Fenton oxidation was used for treatment of synthetic textile wastewater as stand alone treatment, as pre-treatment before aerobic biological treatment and as post-treatment after anaerobic biological treatment. The processes were compared with regards to decolorization, chemical oxygen demand (COD) reduction and chemical consumption. When applying photo-Fenton alone for treatment of Remazol Red RR (100 mg/l), optimal conditions were 3.0 mM H2O2 and 0.25 mM Fe2+. These conditions resulted in complete decolorization and a residual COD of 2.9 mg/l. When reducing the H2O2 dose to 1 mM, residual COD was 22 mg/l. In the combined photo-Fenton/aerobic treatment complete decolorization and COD removal was achieved at 3 mM H2O2 and 0.25 mM Fe2+, while 9 mg/l of residual COD remained at the H2O2 concentration 1 mM. When applying photo-Fenton as post-treatment after the anaerobic step, the residual COD was 14 mg/l independent of the H2O2 concentration being set to 1 or 3 mM, however the Fe2+ concentration needed to be increased to 2 mM, due to complex formation with the phosphate added as a macronutrient. Phytotoxicity tests showed higher residual toxicity after the photo-Fenton treatment alone than after the combined processes. Our results thereby show that incorporation of a biological step leads to improved mineralization and reduced residual toxicity at lower H2O2 doses. (C) 2011 Elsevier B.V. All rights reserved.}},
author = {{Jonstrup, Maria and Punzi, Marisa and Mattiasson, Bo}},
issn = {{1873-2666}},
keywords = {{Aerobic; Anaerobic; Azo dyes; Combined process; Photo-Fenton}},
language = {{eng}},
number = {{1}},
pages = {{55--61}},
publisher = {{Elsevier}},
series = {{Journal of Photochemistry and Photobiology, A: Chemistry}},
title = {{Comparison of anaerobic pre-treatment and aerobic post-treatment coupled to photo-Fenton oxidation for degradation of azo dyes}},
url = {{http://dx.doi.org/10.1016/j.jphotochem.2011.09.006}},
doi = {{10.1016/j.jphotochem.2011.09.006}},
volume = {{224}},
year = {{2011}},
}