期刊
BIORESOURCE TECHNOLOGY
卷 340, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.125638
关键词
Mariculture wastewater; Metabolomics; Brackish water; Sea salt; Aquaculture
资金
- National Key Research and Development Program [2019YFC0408503]
- Project of Thousand Youth Talents
- Universiti Malaysia Terengganu [UMT/RMIC/2-2/25 Jld 5 (64), 55191, UMT/CRIM/2-2/5 Jilid 2 (10), 56051, 66955]
Sea salt is a more effective trigger for treating wastewater (almost 100% total nitrogen and total phosphorus removal) and producing high-quality biodiesel (330 mg/L.d). The structure equation model (SEM) further demonstrates a weakening correlation between wastewater treatment performance and microalgal status with increasing sea salt concentrations. Additionally, metabolic analysis reveals enhanced photosynthesis may be the key motivator for favorable outcomes under sea salt stimulation.
Mariculture wastewater has drawn growing attention due to associated threats for coastal environment. However, most biological techniques exhibit unfavorable performance due to saline inhibition. Furthermore, only NaCl was used in most studies causing clumsy evaluation, undermining the potential of microalgal mariculture wastewater treatment. Herein, various concentrations of NaCl and sea salt are comprehensively examined and compared for their efficiencies of mariculture wastewater treatment and biodiesel conversion. The results indicate sea salt is a better trigger for treating wastewater (nearly 100% total nitrogen and total phosphorus removal) and producing high-quality biodiesel (330 mg/L.d). Structure equation model (SEM) further demonstrates the correlation of wastewater treatment performance and microalgal status is gradually weakened with increment of sea salt concentrations. Furthermore, metabolic analysis reveals enhanced photosynthesis might be the pivotal motivator for preferable outcomes under sea salt stimulation. This study provides new insights into microalgae-based approach integrating mariculture wastewater treatment and biodiesel production.
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