title: Ozonation of piggery wastewater for enhanced removal of contaminants by S. quadricauda and the impact on organic characteristics.
abstract: The feasibility of using ozonation pretreatment was investigated for a better performance of post microalgae-based wastewater remediation when treating piggery effluent which was anaerobically digested and subsequently micro-filtered. Ozonation pretreatment at a dose of 1.1mg-O3 mg-C(-1) or higher significantly improved the transmittance of light illumination through the mixed liquor by decolorizing the piggery effluent as culture media, which resulted in increasing both the productivity of algal biomass and the associated removal of inorganic nutrients from the effluent. Ozonation also converted refractory organic constituents in the piggery effluent to a large number of biodegradable fractions via both partial-mineralization and low-molecularization. These fractions were facilely removed through biological assimilation during the mixotrophic cultivation of a microalga S. quadricauda. The results revealed that ozonation could be one of the most promising strategies for the pretreatment of highly-colored piggery effluent prior to algae-based wastewater treatment.
authors.affiliation: Water Resources Research Institute, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul 143-747, South Korea.
authors.forename: Hyun-Chul
authors.initials: HC
authors.lastname: Kim
authors.affiliation: Center for Water Resources Cycle Research, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, South Korea.
authors.forename: Wook Jin
authors.initials: WJ
authors.lastname: Choi
authors.affiliation: Department of Civil and Environmental Engineering, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul 143-747, South Korea.
authors.forename: Sung Kyu
authors.initials: SK
authors.lastname: Maeng
authors.affiliation: Department of Microbial Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 143-701, South Korea.
authors.forename: Hyung Joo
authors.initials: HJ
authors.lastname: Kim
authors.affiliation: ENR Solution Co. Ltd., 60-15 Gasan-dong, Keumcheon-gu, Seoul 153-801, South Korea.
authors.forename: Han Soo
authors.initials: HS
authors.lastname: Kim
authors.affiliation: Center for Water Resources Cycle Research, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, South Korea. Electronic address: kgsong@kist.re.kr.
authors.forename: Kyung Guen
authors.initials: KG
authors.lastname: Song
mesh_terms: D000822:Animal Husbandry; D000818:Animals; D001673:Biodegradation, Environmental; D058086:Microalgae / Q000166:cytology / Q000254:growth & development / Q000378:metabolism*; D008970:Molecular Weight; D009930:Organic Chemicals / Q000302:isolation & purification*; D010126:Ozone / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D034421:Sus scrofa; D014865:Waste Disposal, Fluid; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D009930:Organic Chemicals; D010126:Ozone; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Contaminant removal; Mixotrophic microalga; Organic characterization; Ozonation; Piggery wastewater