High-performance biological treatment of tuna wash processing wastewater using Yarrowia lipolytica
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RESEARCH ARTICLE
High-performance biological treatment of tuna wash processing wastewater using Yarrowia lipolytica Selma Hamimed 1
&
Taha Barkaoui 1 & Ismail Trabelsi 2 & Ahmed Landoulsi 1 & Abdelwaheb Chatti 1
Received: 1 March 2020 / Accepted: 20 August 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract It is well known that the lack of an effective treatment of tuna wash processing wastewater may pose substantial environmental and public health hazards. The present work investigates the performance of biological treatment of tuna wash processing wastewater (TWPW) by using Yarrowia lipolytica. Under optimized experimental conditions (pH “6.40–6.50” and 29 °C), Y. lipolytica reduced the pollution level of the crude and the diluted TWPW after only 7 days of incubation. The Yarrowia treatment leaded to a reduction of 66% chemical oxygen demand, 69.8% total organic carbon, 66% salinity, and phosphorus total (100%) removal of the crude TWPW, while the treated-diluted TWPW revealed significant reductions in chemical oxygen demand and total organic carbon (75% and 74%, respectively), as well as salinity (68%). Interestingly, a total removal of nitrogen and phosphorus from the diluted TWPW was obtained. Under high salinity, an important Y. lipolytica biomass of 5 g L−1 is produced with high levels of lipids and protein contents at around 336 ± 12.2 mg g−1 and 302.15 ± 5.44 mg g−1, respectively. The phytotoxicity assessment of the treated TWPW on fenugreek seeds shows promising results, which reveals the good performance of Yarrowia treatment in reducing the toxicity of this wastewater. Keywords Tuna wash processing wastewater . Biodegradation . Lipids . Yarrowia lipolitica . Phytotoxicity . Proteins
Introduction Fish-processing industries have an economical importance in coastal countries. However, such process needs high quantities of water leading to the release of significant volumes of wastewater. According to Chowdhury et al. (2010), 13,627.4 m3/day of fish wastewaters are unfettered after defrosting, washing, and cleaning. These effluents, generally discharged without an appropriate treatment, cause a serious environmental problems mainly due to their high salinity (> 10 g L−1), high concentration of organic matter (proteins,
Responsible Editor: Philippe Garrigues * Selma Hamimed [email protected] 1
Laboratory of Biochemistry and Molecular Biology, University of Carthage, Faculty of Sciences of Bizerte, CP 7021 Jarzouna, Tunisia
2
Laboratory of Treatment and Valorization of Water Rejects Water Researches and Technologies Center, Borj-Cedria Technopark, CP 8020 Soliman, Tunisia
carotenoids, biopolymers, biomaterials, and cleaning agents), and suspended matter ranging from 100 to 6100 mg L−1 (Arvanitoyannis and Kassaveti 2008; Chowdhury et al. 2010; Jemli et al. 2015). As well, these effluents have a high biological oxygen demand (BOD) (500–1500 mg L−1) and chemical oxygen demand (COD) (> 30 g L−1). Moreover, the odor is often the most significant form of air pollution in fis
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