Auto-flocculation microalgae species Tribonema sp. and Synechocystis sp. with T-IPL pretreatment to improve swine wastewater nutrient removal

Pengfei Cheng, Dongjie Chen, Wei Liu, Kirk Cobb, Nan Zhou, Yuhuan Liu, Hui Liu, Qin Wang, Paul Chen, Chengxu Zhou, Roger Ruan

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

It is recognized coupling microalgae, which is rich in lipids or protein with wastewater treatment offers extra economic benefits that can potentially make microalgal production feasible by reducing production costs and providing environmental benefits. However, the pretreatment of high concentration nutrients such as ammonia nitrogen (NH3-N), total phosphorus (TP) and chemical oxygen demand (COD) in swine wastewater is the premise of application for microalgae in wastewater treatment. This study two auto-flocculation microalgae Tribonema sp. and Synechocystis sp. were selected for evaluation; they were cultivated in diluted swine wastewater together after it was pretreated with titanium dioxide (TiO2) plus intense pulsed light (T-IPL). The results showed that the growth of the two strains in the wastewater pretreated with T-IPL grew better than when grown without the pretreatment. The content of lipid in the two algae, cultured in the pretreated wastewater, was also higher than the lipid content from the un-pretreated wastewater; but protein content was lower. Overall, the removal efficiencies of pollutants NH3-N, TP, and COD by the two microalgae in anaerobic digestion of swine wastewater (ADSW) with T-IPL pretreatment, were higher than the removal efficiencies without pretreatment. This research also indicates that these two auto-flocculation microalgae have the potential to reduce harvesting costs. And, using T-IPL to pretreat wastewater could provide a promising method for the pretreatment of wastewater.

Original languageEnglish (US)
Article number138263
JournalScience of the Total Environment
Volume725
DOIs
StatePublished - Jul 10 2020

Bibliographical note

Funding Information:
This work was sponsored by Natural Science Foundation of Zhejiang Province ( LY20D060003 ), the Open Fund of Key Laboratory of Experimental Marine Biology, Chinese Academy of Sciences ( KF2019N03 ), the Ningbo Municipal Science and Technology Project ( 2019C10071 ), the Ningbo Municipal Natural Science Foundation ( 431901822 ), the International Postdoctoral Exchange Fellowship Program ( 20180042 ), the China Postdoctoral Science Foundation (2017T100583, 2016M600616), the Natural Science Foundation of Jiangxi Province ( 20171BAB214014 ), the Key Laboratory of Poyang Lake Ecological Environment and Resource Development ( PK2017001 ), Guangzhou Science and Technology Plan ( 201807010056 ), and the University of Minnesota Center for Biorefining.

Funding Information:
This work was sponsored by Natural Science Foundation of Zhejiang Province (LY20D060003), the Open Fund of Key Laboratory of Experimental Marine Biology, Chinese Academy of Sciences (KF2019N03), the Ningbo Municipal Science and Technology Project (2019C10071), the Ningbo Municipal Natural Science Foundation (431901822), the International Postdoctoral Exchange Fellowship Program (20180042), the China Postdoctoral Science Foundation (2017T100583, 2016M600616), the Natural Science Foundation of Jiangxi Province (20171BAB214014), the Key Laboratory of Poyang Lake Ecological Environment and Resource Development (PK2017001), Guangzhou Science and Technology Plan (201807010056), and the University of Minnesota Center for Biorefining. No conflicts, informed consent, human or animal rights are applicable. All the authors listed have approved the manuscript and agreed to authorship and submission of the manuscript for peer review.

Publisher Copyright:
© 2020

Keywords

  • Anaerobic digestion of swine wastewater
  • Cost
  • High-value products
  • Microalgae
  • Nutrient removal
  • T-IPL

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