期刊
CHEMICAL ENGINEERING JOURNAL
卷 361, 期 -, 页码 89-98出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2018.12.064
关键词
Hazardous wastewater; Integrated treatment; Biological oxidation; Photocatalytic ozonation
资金
- Spanish Ministerio de Economia y Competitividad (MINECO)
- European Feder Funds [CTQ2012-35789-C02-01/PPQ, CTQ2015-64944-R]
- Spanish MINECO
- Santander Universidades
The feasibility of the treatment of a complex industrial wastewater by aerobic biodegradation in a sequential batch reactor (SBR) followed by ozone-based advanced oxidation processes (AOPs) has been studied. The industrial wastewater had high organic load (TOC > 3 g L-1, COD > 12 g L-1, BOD5 > 2 g L-1) including some toxic/harmful compounds and high concentration of metal and other inorganic species. SBR treatment of the industrial wastewater diluted with urban wastewater (dilution 1:5), was successful after complete acclimation of the mixed culture (i. e.,> 50% COD and TOC removals). Nevertheless, the SBR effluent was still not acceptable to be disposed into the environment (c. a. COD 850 mg L-1) so ozonation, solar photo-ozonation and solar photocatalytic ozonation processes were investigated as further polishing treatments. Thus, the sequential combination of aerobic biodegradation and solar photocatalytic ozonation with a TiO2-based catalyst led to an effluent suitable for discharge into the aquatic environment according to environmental regulations (COD < 125 mg L-1, BOD5 < 25 mg L-1).
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