This study examined continuous mixed-culture microalgae cultivation for nutrient removal from anaerobic digestion (AD) effluents in photobioreactors, while altering the NH-N loading rate (NLR) by adjusting either the hydraulic retention time (HRT) (reactor set RH) or the influent NH-N concentration (reactor set RS). Both RH and RS demonstrated efficient nutrient removal and microalgae cultivation at NLRs of 4-10 mg NH-N/L∙d, reaching peak performance at 10 mg NH-N/L∙d. Within this range, RH obtained greater biomass yield and productivity, while RS maintained higher microalgal concentrations. The cultivated biomasses obtained from RH and RS had good settleability and suitable fatty acid compositions as a biodiesel feedstock, although their organic composition varied considerably with NLR and HRT. Parachlorella overwhelmingly dominated the reactors' microalgal communities throughout the experiment, co-existing with various microalgae-associated bacteria. Changes in NLR significantly influenced the bacterial community structures, underscoring its critical role in determining reactor performance and microalgal-bacterial community behavior.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.biortech.2023.129650 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Growth potential, biochemical properties and nutrient removal efficiency of some freshwater microalgae and their consortia from wastewater.
Int J Phytoremediation
September 2024
Department of Ecology and Environmental Science, Assam University, Silchar, Assam, India.
Article Synopsis
- The study examined the effects of different concentrations of nitrate and phosphate, alongside sewage water, on the growth and nutrient removal abilities of microalgae both in solitary and mixed cultures.
- High growth rates were achieved at increased nitrogen and phosphorus levels, with the mixed algal species proving more effective in removing phosphorus and single species excelling in nitrogen removal.
- Notably, the study found high carbohydrate, protein, and lipid contents in sewage water, along with increased antioxidant activity and accumulation of beneficial phytochemicals in the algae under nutrient-rich conditions.
Integrating electro-Fenton and microalgae for the sustainable management of real food processing wastewater.
Chemosphere
July 2024
Instituto de Energías Renovables, Universidad Nacional Autónoma de México (IER-UNAM), Priv. Xochicalco S/N, Col. Centro, Temixco, Morelos, 62580, Mexico. Electronic address:
The present study demonstrates, for the first time, the feasibility of a two-step process consisting of Electro-Fenton (EF) followed by microalgae to treat highly loaded real food processing wastewater along with resource recovery. In the first step, EF with a carbon felt cathode and Ti/RuO-IrO anode was applied at different current densities (3.16 mA cm, 4.
View Article and Find Full Text PDFDifferentiation and quantification of extracellular polymeric substances from microalgae and bacteria in the mixed culture.
Water Res
June 2024
Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ 85287-5701, United States of America.
Extracellular polymeric substances (EPS) play significant roles in the formation, function, and interactions of microalgal-bacteria consortia. Understanding the key roles of EPS depends on reliable extraction and quantification methods, but differentiating of EPS from microalgae versus bacteria is challenging. In this work, cation exchange resin (CER) and thermal treatments were applied for total EPS extraction from microalgal-bacteria mixed culture (MBMC), flow cytometry combined with SYTOX Green staining was applied to evaluate cell disruption during EPS extraction, and auto-fluorescence-based cell sorting (AFCS) was used to separate microalgae and bacteria in the MBMC.
View Article and Find Full Text PDFUnveiling the role of ferrous ion in driving microalgae granulation from salt-tolerant strains for mariculture wastewater treatment.
Sci Total Environ
May 2024
Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
Development of microalgal-bacterial granular sludge (MBGS) from saline-adapted microalgae is a promising approach for efficient mariculture wastewater treatment, whereas the elusive mechanisms governing granulation have impeded its widespread adoption. In this study, spherical and regular MBGS were successfully developed from mixed culture of pure Spirulina platensis and Chlorella sp. GY-H4 at 10 mg/L Fe concentration.
View Article and Find Full Text PDFAlga-based mathematical model of a life support system closed in oxygen and carbon dioxide.
Vavilovskii Zhurnal Genet Selektsii
December 2023
Institute of Biophysics of the Siberian Branch of the Russian Academy of Sciences, Federal Research Center "Krasnoyarsk Science Center SB RAS", Krasnoyarsk, Russia.
The purpose of the study was to compare quantitative analysis methods used in the early stages of closed-loop system prototyping with modern data analysis approaches. As an example, a mathematical model of the stable coexistence of two microalgae in a mixed flow culture, proposed by Bolsunovsky and Degermendzhi in 1982, is considered. The model is built on the basis of a detailed theoretical description of the interaction between species and substrate (in this case, illumination).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!