| Title | Enhanced microalgae cultivation using wastewater nutrients extracted by a microbial electrochemical system |
|---|---|
| ID_Doc | 12267 |
| Authors | Wang, ZX; Hartline, CJ; Zhang, FZ; He, Z |
| Title | Enhanced microalgae cultivation using wastewater nutrients extracted by a microbial electrochemical system |
| Year | 2021 |
| Published | |
| Abstract | Cultivating algae using wastewater nutrients is a potential approach to realize resource recovery that can contribute to circular economy. However, growing algae directly in a wastewater has problems such as bacterial contamination and a low biomass density. To address those problems, we investigated microalgal cultivation in a photobioreactor (PBR) fed with the nutrients extracted from wastewater by a microbial nutrient recovery cell (MNRC). With an external voltage of 0.3 V, the MNRC-PBR system removed 96% of COD and recovered 44% of NH4+-N and 39% of PO43--Pat a hydraulic retention time of 7.2 h. Microalgae cultivated in the nutrient recovery medium from the MNRC had 8.3-fold biomass density and 1.4-fold lipid contents, versus that cultivated in a food wastewater containing more nutrients. More significantly, 90% of biomass yielded from the MNRC-PBR system was microalgae, much higher than similar to 30% in the food wastewater. A liquid exchange ratio of 30% achieved the highest microalgal density of 0.61 +/- 0.06 g L-1, comparable to that in a standard BG11 medium. There was a tradeoff between recycling PBR medium and microalgal growth. The accumulated salinity was observed in the extended operation of the MNRC-PBR system treating an actual food wastewater. The results of this study have demonstrated an effective approach to extract nutrients from wastewater for enhanced microalgal growth and improved biomass quality. |
Similar Articles
| ID | Score | Article |
|---|---|---|
14057
|
Mahmoud, RH; Wang, ZX; He, Z Production of algal biomass on electrochemically recovered nutrients from anaerobic digestion centrate(2022) | |
| 12496
|
Vu, MT; Vu, HP; Nguyen, LN; Semblante, GU; Johir, A; Nghiem, LD A hybrid anaerobic and microalgal membrane reactor for energy and microalgal biomass production from wastewater(2020) | |
| 29215
|
Reddy, CN; Nguyen, HTH; Noori, MT; Min, B Potential applications of algae in the cathode of microbial fuel cells for enhanced electricity generation with simultaneous nutrient removal and algae biorefinery: Current status and future perspectives(2019) | |
| 24979
|
de Morais, EG; Sampaio, ICF; Gonzalez-Flo, E; Ferrer, I; Uggetti, E; García, J Microalgae harvesting for wastewater treatment and resources recovery: A review(2023) | |
| 28240
|
Chia, SR; Ling, J; Chia, WY; Nomanbhay, S; Kurniawan, TA; Chew, KW Future bioenergy source by microalgae-bacteria consortia: a circular economy approach(2023)Green Chemistry, 25.0, 22 | |
| 24129
|
Morillas-España, A; Lafarga, T; Acién-Fernández, FG; Gómez-Serrano, C; González-López, CV Annual production of microalgae in wastewater using pilot-scale thin-layer cascade photobioreactors(2021)Journal Of Applied Phycology, 33, 6 | |
| 5442
|
Mahari, WAW; Razali, WAW; Manan, H; Hersi, MA; Ishak, SD; Cheah, W; Chan, DJC; Sonne, C; Show, PL; Lam, SS Recent advances on microalgae cultivation for simultaneous biomass production and removal of wastewater pollutants to achieve circular economy(2022) | |
| 6232
|
Li, G; Hu, RC; Wang, N; Yang, TL; Xu, FZ; Li, JL; Wu, JH; Huang, ZG; Pan, MM; Lyu, T Cultivation of microalgae in adjusted wastewater to enhance biofuel production and reduce environmental impact: Pyrolysis performances and life cycle assessment(2022) | |
| 25974
|
Sravan, JS; Hemalatha, M; Mohan, SV Cascading Integration of Electrofermentation and Photosynthesis-Low-Carbon Biorefinery in Closed Loop Approach(2023)Advanced Sustainable Systems, 7, 12 | |
| 23757
|
Uggetti, E; García, J; Alvarez, JA; García-Galán, MJG Start-up of a microalgae-based treatment system within the biorefinery concept: from wastewater to bioproducts(2018)Water Science And Technology, 78, 1 |