Cultivation of Microalgae in Liquid Digestate to Remove Nutrients and Organic Contaminants

Author:

Sobolewska EwelinaORCID,Borowski Sebastian,Nowicka-Krawczyk Paulina

Abstract

AbstractThe goal of this research was to assess the efficiency of the liquid digestate treatment conducted with algal, environmental isolates illuminated entirely with sunlight. The photobioreactor was exposed to natural conditions and evaluated based on the reduction of chemical oxygen demand (COD), nitrogen compounds, and soluble phosphates. Microalgal and bacterial communities growing during the treatment process were studied. A high removal rate of soluble COD (= 91%) and nutrients (= 86%) was achieved. The average concentrations of nitrogen, phosphates, and COD in the reactor effluent were 95 mgN/L, 49 mg/L, and 735 mg O2/L, respectively. The overall algae-bacteria biomass productivity of 22 mg/L/d, calculated on the total suspended solids (TSS) basis, was recorded. The microbial analysis revealed the dominance of Tetradesmus obliquus followed by Microglena sp. in the first 14 weeks of the experiment. At the end of the experimental run, Chlorella sorokiniana cells appeared as a result of illumination intensity changes. The dominating bacteria belonged to Firmicutes (26.31%), Patescibacteria (17.38%), and Actinobacteriota (14.86%) and could have been responsible for the transformation of nitrogen and oxidation of organic contaminants. The research demonstrated that natural sunlight can successfully be used for efficient liquid digestate treatment with the algae-bacterial community.

Publisher

Springer Science and Business Media LLC

Reference50 articles.

1. Xia A, Murphy JD (2016) Microalgal cultivation in treating liquid digestate from biogas systems. Trends Biotechnol 34:264–275. https://doi.org/10.1016/j.tibtech.2015.12.010

2. European Biogas Association (2020) Eba Statistical Report 2020. https://www.europeanbiogas.eu/eba-statistical-report-2020/. Accessed 20 Dec 2023

3. European Parliament and Council (2019) Regulation (EU) 2019/1009 of 5 June 2019 laying down rules on the making available on the market of EU fertilising products and amending Regulations (EC) No 1069/2009 and (EC) No 1107/2009 and repealing Regulation (EC) No 2003/2003. OJ L 170, 25.6.2019. https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A02019R1009-20230316. Accessed 6 Mar 2024

4. Franchino M, Tigini V, Varese GC et al (2016) Microalgae treatment removes nutrients and reduces ecotoxicity of diluted piggery digestate. Sci Total Environ 569–570:40–45. https://doi.org/10.1016/j.scitotenv.2016.06.100

5. Akhiar A, Battimelli A, Torrijos M, Carrere H (2017) Comprehensive characterization of the liquid fraction of digestates from full-scale anaerobic co-digestion. Waste Manag 59:118–128. https://doi.org/10.1016/j.wasman.2016.11.005

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3